JP6791664B2 - Contrast agent management device - Google Patents

Description

Embodiments of the present invention relate to a contrast agent management device.

Contrast agents are agents used in diagnostic imaging to obtain high-contrast images of specific tissues such as blood vessels and tumors. Examinations using contrast media are carried out in various modalities such as X-ray CT (Computed Tomography) equipment and ultrasonic diagnostic equipment.

The amount of contrast medium administered to a subject in an examination varies depending on the type of examination and the examination site. In addition, the dose of the contrast medium varies from subject to subject depending on the body weight and gender of the subject. Therefore, in the prior art, there is provided a system for calculating the amount of contrast medium used in an examination from the body weight of a patient or the like.

However, the amount of contrast medium calculated in the prior art is an amount estimated from the body weight of the subject, etc., which is necessary for the examination, and the estimated amount of the contrast medium is not necessarily used in the actual examination. Is not always. Further, in the examination, an amount obtained by adding a margin amount to the calculated required amount of the contrast medium is prepared. That is, an extra contrast medium is prepared in the examination, and the excess contrast medium is discarded for each examination.

The contrast medium is enclosed in, for example, an ampoule, which is a disposable container for the contrast medium. An ampoule is a tubular container made of a material such as glass or plastic. For example, in the case of a glass ampoule, the drug is injected into the container in a sterile state, and then the tip is sealed to make it sterile. Can be kept. When using the drug in the ampoule, fold the tip of the ampoule and take out the encapsulated drug.

The contrast medium may be enclosed in other disposable containers called syringes and vials. Hereinafter, all disposable containers in which a drug such as a contrast medium is enclosed will be referred to as an ampoule.

Ampoules opened during the examination are discarded from a hygienic point of view, even if only a small amount of contrast medium is used. In addition, the cost of the examination is calculated based on the price and number of opened ampoules of contrast agent. Therefore, even if there are ampoules with a small amount of contrast medium used in the test, the test fee will be charged for all opened ampoules.

Japanese Patent No. 5486315

An object to be solved by the present invention is to provide a contrast medium management device capable of efficiently using a contrast medium.

The contrast medium management device according to the embodiment is composed of a calculation unit that calculates the amount of contrast medium to be prepared according to the test conditions of the subject, and a plurality of ampoules having different capacities according to the amount of the contrast medium to be prepared. , A selection unit that selects the combination of the ampoules used in the examination of the subject so that the total price of the ampoules is the lowest.

The conceptual block diagram which shows an example of the contrast agent management apparatus which concerns on 1st Embodiment. The functional block diagram which shows the functional structure example of the contrast agent management apparatus which concerns on 1st Embodiment. The flowchart which shows an example of the operation of the contrast agent management apparatus which concerns on 1st Embodiment. The schematic diagram explaining the calculation method of the required amount of the contrast medium in 1st Embodiment. The schematic diagram explaining the method of selecting the ampoule combination in the 1st Embodiment. The schematic diagram explaining the method of selecting the ampoule combination in the 2nd Embodiment. The schematic diagram explaining the method of selecting the ampoule combination in the 3rd Embodiment. A table showing examination information and contrast agent information in the fourth embodiment. The table which shows the combination number 1-9 of the ampoule in 4th Embodiment. The table which shows the combination number 10-18 of the ampoule in 4th Embodiment. The table which shows the combination 1 of examination information, contrast agent information, and an ampoule in 5th Embodiment. A table showing inventory fluctuation information in the ampoule combination 1 according to the fifth embodiment.

Hereinafter, the contrast medium management device of the embodiment will be described with reference to the drawings. In each figure, the same elements are designated by the same reference numerals, and duplicate description will be omitted.

[First Embodiment]
(1) Configuration FIG. 1 is a conceptual configuration diagram showing an example of a contrast agent management device according to the first embodiment. As shown in FIG. 1, the contrast agent management device 100A includes a storage circuit 10, a processing circuit 20a, an input circuit 30, a display 40, and a communication control device 50. The contrast agent management device 100A is connected to the injector 200, the external database 300, and the modality 400 via the electronic network 70 via the communication control device 50.

The injector 200 is a device for administering a contrast medium to a subject. The injector 200 has components such as a syringe for filling the contrast medium to be administered to the subject and a piston for injecting the contrast medium filled in the syringe into the subject at a constant amount and at a constant speed. In addition, the injector 200 includes components that control the amount of contrast agent injected into the subject and display it on a display.

The external database 300 is a part of a system operated in a hospital, for example, a radiological information system (RIS) (not shown) or a hospital information system (HIS) (HIS) (not shown). .. The external database 300 stores medical information such as contrast agent management information, patient information, or diagnostic images according to a data management program installed in RIS or HIS.

The Modality Performed Procedure Step (MPPS) is an information notification method based on the DICOM (Digital Imaging and Communication in Medicine) standard. An external database 300 such as RIS acquires and stores the implementation status of the contrast agent examination from the injector 200 according to, for example, MPPS. The implementation status of the contrast agent test includes medical information such as the weight difference before and after the use of the ampoule and the amount of the contrast medium actually used in the test.

The modality 400 includes, for example, a medical image diagnostic device such as an X-ray CT device, a magnetic resonance imaging (MRI) device, an X-ray angiography device (XA), and an ultrasonic diagnostic device. ..

The communication control device 50 implements various communication protocols according to the network form. Here, the electronic network 70 means the entire information communication network using telecommunications technology, and is a hospital backbone LAN, wireless / wired LAN, Internet network, telephone communication line network, optical fiber communication network, cable communication network, and satellite. Including communication networks and so on.

The contrast agent management device 100A may be configured to acquire medical information such as examination information and contrast agent information from the injector 200, the external database 300, the modality 400, and the like via the electronic network 70.

The storage circuit 10 of the contrast agent management device 100A is composed of, for example, semiconductor memory elements such as a RAM (Random Access Memory) and a flash memory (Flash Memory), a hard disk, an optical disk, and the like. The storage circuit 10 may be composed of a portable medium such as a USB (Universal Serial Bus) memory and a DVD (Digital Video Disk). The storage circuit 10 stores various programs (including an OS (Operating System) and the like in addition to the application program) executed in the processing circuit 20a, data necessary for executing the programs, and image data. Further, the storage circuit 10 may store various commands for controlling the OS and a GUI (Graphical User Interface) program that supports input from the input circuit 30.

The processing circuit 20a is interconnected to each hardware component constituting the contrast medium management device 100A via a system bus 60 as a common signal transmission line.

The processing circuit 20a may be configured by dedicated hardware, or may be configured to realize various functions described later by software processing by a built-in processor. Here, as an example, a case where the processing circuit 20a realizes various functions by software processing by the processor will be described.

The processors in the above description include a dedicated or general-purpose CPU (Central Processing Unit), a GPU (Graphics Processing Unit), an application specific integrated circuit (ASIC), a programmable logic device, and a field programmable gate array. It means a circuit such as (FPGA: Field Programmable Gate Array). Examples of the programmable logic device include a simple programmable logic device (SPLD: Simple Programmable Logic Device) and a compound programmable logic device (CPLD: Complex Programmable Logic Device). The processing circuit 20a realizes each function by reading and executing a program stored in the storage circuit 10 or a program directly incorporated in the processor of the processing circuit 20a.

Further, the processing circuit 20a may be composed of a single processor or a combination of a plurality of independent processors. In the latter case, a plurality of storage circuits corresponding to the plurality of processors may be provided, and the program executed by each processor may be stored in the storage circuit corresponding to the processor. As another example, one storage circuit may collectively store programs corresponding to each function of a plurality of processors.

The input circuit 30 is a circuit for inputting a signal from an input device such as a keyboard, a mouse, a joystick, or a trackball. Here, it is assumed that the input device itself is also included in the input circuit 30. When the input device is operated by the operator, the input circuit 30 generates an input signal corresponding to the operation and outputs the input signal to the processing circuit 20a.

The display 40 is a display device such as a liquid crystal display panel, a plasma display panel, and an organic EL (Electro Luminescence) panel. The display 40 displays medical information such as ampoule combinations and subject information recommended by the contrast agent management device 100A under the control of the processing circuit 20a.

FIG. 2 is a functional block diagram showing a functional configuration example of the contrast medium management device 100A according to the first embodiment. As shown in FIG. 2, the processing circuit 20a of the contrast agent management device 100A has a calculation function 21a and a selection function 22a. The calculation function 21a and the selection function 22a are functions realized by the processor of the processing circuit 20a executing the program stored in the storage circuit 10.

The calculation function 21a is a function of estimating the required amount of the contrast medium used in the examination of the subject and calculating the recommended reserve amount of the contrast medium based on the required amount of the contrast medium. The required amount of contrast medium is estimated, for example, based on the body weight of the subject or the amount of contrast medium actually used in previous examinations. Here, as an example, the above-mentioned "recommended amount of contrast medium" is an amount obtained by adding a predetermined margin to the "required amount of contrast medium" calculated based on test conditions such as the weight of a subject. Is. The method for estimating the required amount of contrast medium will be described later.

The storage destination of the amount of the contrast medium actually used in the past examination may be any of the external database 300, the injector 200, and the storage circuit 10 of the contrast medium management device 100.

Test-related information such as the test type and the weight of the subject may also be stored in the external database 300 such as HIS or RIS, or may be stored in the storage circuit 10 of the contrast agent management device 100A. Further, the contrast medium management device 100A may be configured so that the information necessary for calculating the required amount of the contrast medium based on the calculation function 21a is input from the input circuit 30. Alternatively, the contrast agent management device 100A may be configured so that the information necessary for calculating the required amount at the time of contrast by the estimation function 21a is downloaded from the external database 300 or the like via the electronic network 70.

Hereinafter, a case where the information necessary for estimating the required amount of the contrast medium is stored in the storage circuit 10 of the contrast medium management device 100A will be described as an example. As shown in FIG. 2, the storage circuit 10 of the contrast medium management device 100A stores the test record information IA1, the test information IB1, and the contrast medium information IC1.

Examination performance information IA1 includes examination information regarding examinations performed in the past and contrast agent information used in the examinations performed in the past. Here, the examinations performed in the past include all the examinations performed before the examinations to be performed in the hospital where the contrast agent management device 100A is installed.

The test record information IA1 includes the test type, the test site, the subject information to be tested, and the contrast agent information used for each test performed in the past. The inspection type is the type of modality or the type of inspection performed for each modality. When an X-ray CT apparatus is used, there are examination types such as simple CT examination, contrast CT examination, and angiography CT examination. The inspection site is the name of the anatomical site or organ to be inspected, and is, for example, the head, chest, heart, kidney, or the like. The subject information is information including the age, sex, and weight of the subject. The contrast agent information used includes the type of contrast agent and the amount used. Contrast media are treated as different types of contrast media if they are the same drug but have different concentrations and manufacturers. The types of contrast media are distinguished by the name of the contrast medium ampoule, such as the drug name or trade name of the contrast medium.

The inspection information IB1 is inspection information regarding the inspection to be carried out in the future. Test information IB1 includes test type, test site, and subject information to be tested for the test to be performed.

The contrast agent information IC1 includes the type of contrast agent, the concentration of the contrast agent, the capacity of the ampoule of the contrast agent, and the price of the ampoule of the contrast agent.

The calculation function 21a has a function of searching the inspection record information under the same conditions as the inspection to be performed, that is, the inspection record information under the same conditions as the inspection information IB1 from the inspection record information IA1. If the test record information IA1 does not include the test record information under the same conditions as the test to be performed from now on, the calculation function 21a calculates the amount of the contrast medium required per unit weight, and the calculated amount is the weight of the subject. The required amount of contrast medium is estimated by multiplying by. The method of estimating the required amount of the contrast medium based on the calculation function 21a will be described in detail with reference to FIG. 4 described later.

The selection function 22a combines a plurality of types of ampoules of different capacities according to the recommended reserve amount calculated based on the required amount of the contrast medium, and selects the optimum combination of ampoules used in the examination of the subject. It is a function. For example, the combination of a plurality of ampoules having the lowest total price is selected by the selection function 22a as a recommended combination. The method of selecting the ampoule combination based on the selection function 22a will be described in detail with reference to FIG. 5 described later.

(2) Operation FIG. 3 is a flowchart showing an example of the operation of the contrast medium management device 100A according to the first embodiment. Hereinafter, the operation of the contrast medium management device 100A according to the first embodiment will be described with reference to FIGS. 4 and 5, according to the step numbers in the flowchart of FIG.

The processing in each step of the flowchart of FIG. 3 is realized by the processing circuit 20a calling and executing a predetermined program corresponding to the calculation function 21a and the estimation function 22a from the storage circuit 10. Hereinafter, the processing executed by the calculation function 21a and the estimation function 22a realized by the processing circuit 20a will be described for each corresponding step.

In step S101, the inspection information of the inspection to be performed is acquired by the calculation function 21a.

In step S103, the calculation function 21a calculates the recommended reserve amount of the contrast medium to be used in the examination to be performed. The recommended reserve amount is an amount obtained by adding a predetermined margin amount to the required amount estimated from the body weight of the subject to be tested. Hereinafter, the calculation process of the required amount will be described in detail with reference to FIG.

FIG. 4 is a schematic diagram illustrating a method of calculating the required amount of the contrast medium in the first embodiment. The upper part of FIG. 4 is a table showing the inspection information IB1 of the inspection to be performed from now on. The middle part of FIG. 4 is a table showing inspection record information IA1.

The test information IB1 in the upper part of FIG. 4 has a test ID of "000X", a test type of "CT", a test site of "chest", a gender of "male", an age of "40", and a weight of "75" kg. An example of the inspection information of is shown. Therefore, FIG. 4 shows a method of calculating the required amount of the contrast medium used in the examination of the examination ID “000X” recorded in the examination information IB1.

More specifically, the calculation function 21a searches the inspection record information IA1 for inspections under the same conditions as the inspection information IB1. That is, the test that matches the conditions of the test ID "000X", the test type is "CT", the test site is "chest", the sex is "male", the age is "40", and the weight is "75" kg. It is searched from the performance information IA1. The inspection record information IA1 shown in the middle part of FIG. 4 shows an example in which there is no inspection whose conditions match the above-mentioned inspection ID “000X”.

As a result of the search, when the inspection result information IA1 includes the inspection of the condition matching the condition of the inspection information IB1, the searched information is utilized by the calculation function 21a. That is, the recorded content of the item of "contrast medium used" in the inspection under the conditions matching the conditions of the inspection information IB1 included in the inspection record information IA1 is the type of contrast medium to be used in the inspection and the required amount of the contrast medium. Is used for the calculation process of the recommended reserve amount in the calculation function 21a.

On the other hand, as shown in the middle part of FIG. 4, when there is no inspection whose conditions match the above-mentioned inspection ID “000X”, an inspection similar to the conditions of the inspection ID “000X” is extracted from the inspection record information IA1 by the calculation function 21a. Will be done. An inspection similar to the condition of the inspection ID "000X" can be extracted by, for example, a search excluding some conditions from all the conditions of "000X". The required amount of contrast medium is calculated based on the test information extracted in this way.

Specifically, the search is executed by the calculation function 21a under the search conditions limited to the test type "CT", the test site "chest", and the gender "male", and the test record information matching the search conditions is obtained. It is extracted from the inspection record information IA1. The broken line frame corresponding to the inspection information IB1 in the upper part of FIG. 4 indicates the above search condition.

As shown by the broken line frame for the inspection record information IA1 in the middle of FIG. 4, the inspection IDs “0001” and “0002” are extracted as the inspection record information that matches the above search conditions. The calculation function 21a extracts the body weight of the subject from the items of "subject information" of the test IDs "0001" and "0002" of the test record information IA1. Similarly, the name of the contrast medium ampoule and the amount of the contrast medium used are extracted from the item "Contrast medium used".

The type of contrast medium used in the inspection IDs "0001" and "0002" of the inspection record information IA1 shown in the upper part of FIG. 4 is "contrast agent A". Further, the examination ID "0001" has a body weight of the subject of 80 kg and the amount of the contrast medium used is 200 ml, and the examination ID "0002" has the body weight of the subject of 65 kg and the amount of the contrast medium used is 150 ml.

Based on the examination record information retrieved from the examination record information IA1, the calculation function 21a determines that the contrast agent to be used in the examination is "contrast agent A". The amount of contrast medium A used per unit weight of the human body is calculated by the calculation function 21a from the body weight of the subject extracted from the test record information IA1 and the amount of contrast medium used. Hereinafter, the amount of the contrast medium used per unit weight will be referred to as the contrast medium estimation coefficient.

The coefficient of determination of the contrast medium is, for example, a value obtained by dividing the amount of the contrast medium used for the subject by the body weight of the subject. Specifically, the coefficient of determination of the contrast medium of the examination ID "0001" is a value obtained by dividing 200 ml of the used contrast medium by 80 kg of the body weight of the subject (200 ml ÷ 80 kg = 2.50 ml / kg). Similarly, the coefficient of determination of the contrast medium of the examination ID "0002" is a value obtained by dividing 150 ml of the contrast medium used by the body weight of the subject (65 kg) (150 ml ÷ 65 kg ≈2.31 ml / kg). The coefficient of determination of the contrast medium shown on the left side of the lower part of FIG. 4 is a value rounded off to the third decimal place in order to indicate the calculation result in an easy-to-understand manner, but the actual rounding is in the embodiment of FIG. Not limited.

As shown on the left side of the lower part of FIG. 4, the coefficient of determination of the contrast medium is calculated as 2.50 ml / kg in the case of the examination ID “0001” and 2.31 ml / kg in the case of the examination ID “0002”. .. For example, the required amount of the contrast medium in the examination ID “000X” is estimated using 2.50 ml / kg, which is the larger value of the contrast medium estimation coefficients calculated by the above method. Since the body weight of the subject under the test ID "000X" is 75 kg, the required amount of the contrast medium under the test ID "000X" is a value obtained by multiplying the body weight of the subject 75 kg by the coefficient of determination of the contrast medium 2.50 ml / kg (75 kg). × 2.50 ml / kg = 187.5 ml).

The method of estimating the required amount of the contrast medium in the calculation function 21a is not limited to the mode described in FIG. For example, the type of contrast medium used may be determined for each examination type and examination site, or for each day of the week, depending on the hospital or clinical department. In such a case, the coefficient of determination of the contrast medium may be stored in the storage circuit 10 for each type of contrast medium. Further, even if the contrast medium is composed of the same agent, the concentration may differ depending on the type of the contrast medium. Examination record information Even if the concentration of the contrast medium possessed by IA1 is different from the concentration of the contrast medium used in future examinations, the contrast medium is required by converting the concentration to obtain the coefficient of determination of the contrast medium. The amount can be estimated. As described above, the required amount of contrast medium can be estimated by various methods.

An amount obtained by adding a predetermined margin amount to the required amount of the contrast medium estimated by the method described in FIG. 4 is calculated as the recommended reserve amount of the contrast medium. Specifically, for example, when the margin amount is 50 ml, the recommended preparation amount of the contrast medium in the examination ID "000X" is a value obtained by adding the margin amount 50 ml to the required amount 187.5 ml calculated from the body weight (187. 5 ml + 50 ml = 237.5 ml).

The margin amount may be determined as a fixed amount for each examination type or examination site, or may be determined as a ratio to a required amount such as 10% of the required amount of the contrast medium.

The above is the description of the process of step ST103 for calculating the recommended reserve amount of the contrast medium. Returning to FIG. 3, the explanation of the flowchart will be continued.

In step S105, the ampoule combination is selected by the selection function 22a. The ampoule combination is selected by the selection function 22a based on the recommended reserve amount of the contrast medium calculated in the process of step ST103. There are multiple ampoules of different capacities for contrast media, and each ampoule has a different price. The selection function 22a selects the ampoule combination that has the lowest total price of the combined ampoules.

FIG. 5 is a schematic diagram illustrating a method of selecting an ampoule combination according to the first embodiment. The upper part of FIG. 5 shows an example of the contrast agent information IC1 stored in the storage circuit 10. The contrast agent information IC1 includes the ampoule name, concentration (mgI / ml), volume (ml), and price (yen) of the contrast agent.

The ampoule name is, for example, a trade name or a drug name of a contrast medium, and is exemplified as "contrast medium A" and "contrast medium B" in the upper table of FIG. As shown in the upper part of FIG. 5, the concentration of "contrast agent A" is 300 mgI / ml, there are a plurality of ampoules having different volumes, and the price is different for each volume.

The price of the ampoule of contrast agent A is 3,000 yen when the volume is 200 ml, 2,500 yen when the volume is 150 ml, 2,000 yen when the volume is 100 ml, and when the volume is 50 ml. Is 1,200 yen.

In the example shown in FIG. 5, the price of ampoules is not proportional to the capacity, and even when the same capacity is used, the total price varies depending on the combination of ampoules.

In the example of FIG. 5, a method of selecting an ampoule combination for a recommended reserve amount of 237.5 ml of a contrast medium including a margin amount of 50 ml calculated for the examination ID “000X” in FIG. 4 will be described.

The type of contrast agent used in the examination ID "000X" is "contrast agent A" as in the example of FIG. The selection function 22a calculates all combinations of ampoules of the contrast medium A having a volume of 237.5 ml or more, which is the recommended preparation amount of the contrast medium. From all the calculated combinations, the combination having the lowest total price of the ampoule is selected by the selection function 22a. The lower part of FIG. 5 shows a part of ampoule combinations in which the required amount of contrast medium is 237.5 ml or more due to space limitations.

As shown in combination number 1 of ampoules for contrast medium A shown in the lower part of FIG. 5, when two ampoules having a capacity of 200 ml are combined, the total capacity is 400 ml, which is 237.5 ml or more, which is the required amount of contrast medium. Become. The total price of the ampoule in this case is 6,000 yen. The same applies hereinafter, and the combination number N indicates the case where one ampoule having a capacity of 200 ml and one ampoule having a capacity of 50 ml are combined, and the total capacity is 250 ml and the total price is 4,200 yen. is there.

As shown in the ampoule combination table shown in the lower part of FIG. 5, even if the total capacity is the same, the price varies greatly depending on the ampoule combination. For example, combination number 3, combination number 6, and combination number N have the same total capacity of 250 ml, respectively, but the total prices are 5,200 yen, 4,500 yen, and 4,200 yen, respectively.

From the combinations shown in the lower part of FIG. 5, the combination of ampoules having the lowest total price of combination number N is selected by the selection function 22a as the recommended combination. That is, a combination of one ampoule having a capacity of 200 ml and one ampoule having a capacity of 50 ml is selected as the recommended combination.

The above is the description of the process of step ST105 for executing the selection process of the ampoule combination. The explanation will be continued by returning to the flowchart of FIG.

In step S107, the display 40 displays the ampoule combination selected in step S105. The ampoule combination selected in step S105 may be configured to be stored in the external database 300, or may be configured to be stored in the storage circuit 10 of the contrast agent management device 100A.

The above is the description of the flowchart of FIG.

As described above, the contrast medium management device 100A according to the first embodiment appropriately estimates the required amount of the contrast medium used for the subject, and calculates the recommended reserve amount with a margin in this required amount. Therefore, the contrast medium management device 100A of the first embodiment can easily select the cheapest ampoule combination according to the recommended reserve amount of the contrast medium. Ampoules are available in multiple different volumes, even if the encapsulated drug is the same.

According to the contrast agent management device 100A according to the first embodiment, it is possible to efficiently select a combination of ampoules according to the amount required for the examination from among the plurality of ampoules having different capacities. In addition, the contrast agent management device 100A according to the first embodiment can recommend to the user a combination of ampoules having the lowest price.

[Second Embodiment]
In the first embodiment, a method of selecting a combination in which the total price of ampoules is the lowest price has been described. Hereinafter, the second to fifth embodiments will describe a method of selecting an ampoule combination based on other conditions such as the stock status of ampoules in addition to the total price of ampoules. Since the second and subsequent embodiments are the same as those of the first embodiment except for the method of selecting the ampoule combination, only the differences will be described.

The second embodiment relates to a method of selecting a combination of ampoules that can be provided depending on the stock status of the contrast medium in addition to the first embodiment. Since the second embodiment has the same hardware as the first embodiment shown in FIG. 2, the configuration diagram is omitted. However, in the contrast agent management device of the second embodiment, the functions realized by each component and the contents of each information stored in the storage circuit 10 are slightly different from those of the first embodiment. Therefore, the parts of the second embodiment that are different from those of the first embodiment are designated by different reference numerals from those of the first embodiment as follows. This point is the same for the third to sixth embodiments.

In the second embodiment, the code of the contrast agent management device is 100B, the code of the processing circuit is 20b, the code of the selection function is 22b, and the code of the contrast agent information is IC2.

FIG. 6 is a schematic diagram illustrating a method of selecting an ampoule combination according to the second embodiment. The upper part of FIG. 6 shows the contrast agent information IC2. The lower part of FIG. 6 shows a combination of ampoules having a capacity of 237.5 ml or more, which is the recommended preparation amount of the contrast medium, as in FIG.

The contrast medium information IC2 in the upper part of FIG. 6 shows an example in which a column of the number of ampoules in stock is added to the contrast medium information IC1 shown in the upper part of FIG. 5 in the first embodiment. The ampoule combination shown in the lower part of FIG. 6 shows a part of the ampoule combination as in FIG.

With reference to the number of ampoules in stock shown in the rightmost column of the contrast medium information IC2 in the upper part of FIG. 6, the number of stocks of contrast medium A having a capacity of 50 ml is “0”. If the inventory is zero, ampoules of that capacity cannot be combined. Therefore, the selection function 22b selects the combination so that the price of the ampoule is the lowest so as not to include the ampoule having a capacity of 50 ml which is not in stock.

In the combination list shown in the lower part of FIG. 6, combination number 3 and combination number N including ampoules having a capacity of 50 ml are hatched as combinations that cannot be selected. Of the combination numbers excluding the combination number 3 and the combination number N, the combination with the lowest total ampoule price is the combination number 6.

Therefore, combination number 6 having a total price of 4,500 yen for one ampoule having a capacity of 150 ml and one ampoule having a capacity of 100 ml is selected as a recommended combination by the selection function 22b.

The method of selecting the combination based on the number of stocks is not limited to the aspect of FIG. For example, the selection function 22b may be configured to exclude ampoules having a capacity of 50 ml, which are in stock, and to obtain a combination of ampoules having a recommended preparation amount of contrast medium of 237.5 ml or more. That is, the selection function 22b may be configured to obtain all combinations that do not include ampoules having a capacity of 50 ml and select the combination having the lowest total price from among them.

Further, when there are a plurality of combinations of ampoules in stock that have the lowest total price, the selection function 22b may be configured so as to recommend a combination including ampoules having a large capacity in stock. ..

In the above example, a method of selecting a combination that does not include an ampoule having a stock quantity of zero has been described, but the selection function 22b is configured to select a combination that does not include an ampoule whose stock quantity is less than a preset threshold value. You may. The above "in advance" is before the recommended combination is selected by the selection function 22b, for example, at the time of installation adjustment of the contrast agent management device 100B.

For example, a case of selecting a combination that does not include ampoules with a stock quantity of less than 5 will be specifically described. In the contrast agent information IC2 shown in the upper part of FIG. 6, the ampoules having a stock quantity of less than 5 have capacities of 100 ml and 50 ml. Therefore, a combination having a total capacity of 237.5 ml or more and not including each ampoule having a capacity of 100 ml and a capacity of 50 ml is selected. In the example of FIG. 6, combination number 4 having a total price of 5,000 yen is selected.

In this way, by not combining ampoules whose inventory quantity is less than the threshold value, ampoules can be used so that the inventory is not used up.

Further, the selection function 22b may be configured so as to preferentially select an ampoule whose expiration date is near on the scheduled inspection date. Specifically, information regarding the expiration date is stored in the storage circuit 10 for each ampoule held in stock. Further, by including the scheduled inspection date of each inspection in the inspection information IB2, the selection function 22b can be configured so that the combination including the ampoule whose expiration date is close to the scheduled inspection date is selected.

As described above, the contrast agent management device 100B of the second embodiment can also obtain the same effect as that of the first embodiment. In the second embodiment, it is possible to further recommend a combination of ampoules that can be provided depending on the stock status.

[Third Embodiment]
A third embodiment relates to a method of selecting an ampoule combination such that the ampoule for the margin amount of the contrast medium is different from the ampoule for the required amount in addition to the first or second embodiment. Hereinafter, the reason will be described including the points of view of the present inventors.

When observing a blood vessel using a contrast medium, the contrast medium present in the observation area is washed away by the blood flow over time. If there is no contrast medium in the observation area at the timing of blood vessel observation, a contrast medium may be added. Further, in intervention surgery in which treatment is performed with a catheter or the like while observing the inside of a subject using a contrast medium, the required amount of the contrast medium varies from operation to operation and varies depending on the progress of the operation. If the contrast medium is insufficient during the examination without considering the margin amount, the examination will be interrupted in order to prepare the contrast medium. In order to avoid such a risk, it is desirable to prepare an amount in which a margin amount is added to the required amount.

In the inspection where ampoules with the required amount plus the margin amount are prepared, the total price of all opened ampoules is included in the inspection cost even if the margin amount is not used. This is because all ampoules that have been opened are subject to disposal.

For example, the required amount of contrast medium is 187.5 ml, the margin amount is 50 ml, the recommended preparation amount is 237.5 ml in total, and one ampoule with a capacity of 250 ml is selected at a price of 4,000 yen. Consider the case. In this case, regardless of the amount of contrast medium used in the examination, one prepared ampoule is opened, and the price of this ampoule is included in the examination cost of 4,000 yen.

However, if the amount of contrast medium actually used in the examination is 187.5 ml, which is the required amount, an ampoule having a capacity of 200 ml is sufficient. If only one ampoule with a capacity of 200 ml is prepared at a price of 3,000 yen and the inspection can be performed with the prepared amount without considering the margin amount, the inspection will be performed compared to the case where the margin amount is added. The cost will be reduced by 1,000 yen. On the other hand, as described above, the amount of contrast medium actually used in the examination may not be sufficient only in the required amount.

Therefore, the present inventors have devised a configuration in which a combination of ampoules is selected so that the ampoule corresponding to the required amount and the ampoule corresponding to the margin amount can be divided. In this epoch-making configuration, an amount obtained by adding a margin amount to the required amount is prepared, but when the inspection is completed with only the required amount, it is not necessary to open the ampoule corresponding to the margin amount. In this case, the ampoule corresponding to the surplus amount is not subject to disposal as long as it is not opened, so the price of the ampoule is not included in the inspection cost. That is, when the recommended amount of preparation is prepared, but the amount of contrast medium used in the examination is less than the required amount, the examination cost is lower than when all the prepared ampoules are opened.

Hereinafter, the method of selecting the ampoule combination in the third embodiment will be described with reference to FIG. 7, but in the third embodiment, the code of the contrast agent management device is 100C, the code of the processing circuit is 20c, and the calculation is performed. The code of the function is 21c, and the code of the selection function is 22c.

FIG. 7 is a schematic diagram illustrating a method of selecting an ampoule combination according to the third embodiment. The upper part of FIG. 7 shows the recommended reserve amount of the contrast medium calculated by the calculation function 21c. For example, the required amount calculated based on the body weight of the subject is 187.5 ml. 237.5 ml is prepared as the recommended reserve amount by adding 50 ml as a margin amount to the required amount estimated from the body weight.

In the third embodiment, the selection function 22c calculates the ampoule combination for the required amount and the margin amount, and selects the combination having the lowest total price from the respective combinations.

The table on the left side of the middle row of FIG. 7 shows the combination of ampoules for the required amount of 187.5 ml, and the table on the right side of the middle row of FIG. 7 shows the combination of ampoules for the margin amount of 50 ml.

As shown by the broken line frame with respect to the table showing the ampoule combinations corresponding to the required amount on the left side of the middle row of FIG. 7, combination number 1 is selected as the ampoule combination for the required amount of 187.5 ml. Combination number 1 is a combination of one ampoule having a capacity of 200 ml and a total price of 3,000 yen.

Similarly, as shown by the broken line frame with respect to the table showing the combination of ampoules for the margin on the right side of the middle row of FIG. 7, combination number 4 is selected as the combination of ampoules for the margin of 50 ml. Combination number 4 is a combination of one ampoule having a capacity of 50 ml and a total price of 1,200 yen.

As shown in the lower part of FIG. 7, the total price when the margin amount is used is 4,200 yen because it is the total of one ampoule having a capacity of 200 ml and one ampoule having a capacity of 50 ml. On the other hand, the total price when the surplus amount is not used is 3,000 yen because one ampoule with a capacity of 200 ml is sufficient.

As described above, the same effect as that of the first or second embodiment can be obtained in the third embodiment. In addition, in the third embodiment, the combination of ampoules to be prepared is selected so that the ampoule corresponding to the required amount and the ampoule corresponding to the margin amount are separate. According to the selection method of the third embodiment, when the required amount is sufficient in the inspection, the inspection cost is lower than when the margin amount is used.

[Fourth Embodiment]
A fourth embodiment relates to a method of selecting the optimum ampoule combination for each of a plurality of tests performed within a predetermined period in addition to the first to third embodiments. The predetermined period may be, for example, one day or one month, or may be a period immediately after the contrast medium is received until immediately before the next contrast medium is received.

In the fourth embodiment, the code of the contrast agent management device is 100D, the code of the processing circuit is 20d, the code of the selection function is 22d, the code of the inspection information is IB4, and the code of the contrast agent information is IC4. To do.

FIG. 8 is a table showing the test information IB4 and the contrast agent information IC4 in the fourth embodiment. The upper table of FIG. 8 shows the inspection information IB4 to be carried out within a predetermined period. The inspection information IB4 of FIG. 8 includes three inspection information, and indicates that the three inspections are performed within a predetermined period. In addition, the inspection type and the inspection site to be carried out within a predetermined period may be different. That is, there may be a plurality of types of contrast media used within a predetermined period, and a combination of ampoules according to the required amount is selected for each type of contrast medium used in each examination.

As shown in the inspection information IB4 of FIG. 8, the inspection IDs "0011" and "0012" are the inspection type "CT" and the inspection site "chest", whereas the inspection ID "0013" is the inspection type "0013". It is "CT" and the examination site "abdomen". In the following description, the case where the same contrast medium A is used in the examination of the “chest” and the “abdomen” will be described as an example. In addition, each inspection shown in the inspection information IB4 of FIG. 8 may be carried out in the order of inspection IDs “0011”, “0012”, “0013”, or may be carried out at the same time.

In the rightmost column of the examination information IB4 shown in the upper part of FIG. 8, the recommended preparation amount of the contrast medium is shown for each examination. From top to bottom, the recommended reserves of contrast media are 237.5 ml, 260.5 ml, and 220.0 ml.

The contrast medium information IC4 in the lower part of FIG. 8 shows the price and the number of ampoules in stock of three capacities for the contrast medium A having the same concentration. The price and inventory of ampoules of each capacity are, in order from the top, the number of ampoules with a capacity of 200 ml and a price of 3,000 yen is 5, the number of ampoules with a capacity of 100 ml and a price of 2,000 yen is 2, and the capacity. However, the number of ampoules in stock at a price of 1,200 yen for 50 ml is 4.

The selection function 22d calculates an ampoule combination that exceeds the recommended reserve amount of the contrast medium for each examination performed within a predetermined period. From all these combinations, the combination with the lowest total price of the ampoules used in the inspection performed within a predetermined period is selected by the selection function 22d.

Hereinafter, a list of ampoule combinations for each inspection performed within a predetermined period will be described with reference to FIGS. 9 and 10. Note that FIGS. 9 and 10 show a part (combination numbers 1 to 18) of ampoule combinations for each inspection performed within a predetermined period due to space limitations.

FIG. 9 is a table showing combination numbers 1 to 9 of ampoules according to the fourth embodiment.

FIG. 10 is a table showing combination numbers 10 to 18 of ampoules according to the fourth embodiment.

Here, for simplification of the description, the ampoule combination for each of the inspection IDs “0011” to “0013” shall consist of two ampoules having a total capacity equal to or more than the recommended reserve amount. The third and fourth columns from the left in FIGS. 9 and 10 show the capacities of one and the other of the two ampoules corresponding to each inspection ID.

In the combination number 1 of FIG. 9, the ampoule combination for the inspection ID “0011” (recommended preparation amount of contrast medium 237.5 ml) in the first line excluding the line indicating the item name is two ampoules having a capacity of 200 ml. Similarly, in combination number 1, the ampoule combination for the inspection ID "0012" on the second line is two ampoules with a capacity of 200 ml, and the ampoule combination for the inspection ID "0013" on the third line is also two ampoules with a capacity of 200 ml. is there.

The initial value of the number of ampoules in stock with a capacity of 200 ml is 5, as shown in the contrast medium information IC4 in the lower part of FIG. Consider the number of stocks when combination number 1 is selected. In this case, after the inspection of the inspection ID "0011" is completed, the number of ampoules in stock with a capacity of 200 ml decreases by 2 from the initial value of 5 to 3 (5th column from the left in FIG. 9, 1st row from the top). .. After that, after the inspection of the inspection ID "0012" is completed, the number decreases by 2 to 1 (5th column from the left and 2nd row from the top in FIG. 9), and 2 after the inspection of the inspection ID "0013" is completed. This decrease to -1 (5th column from the left and 3rd row from the top in FIG. 9).

It is assumed that ampoules required for inspection cannot be prepared for ampoule combinations in which the number of ampoules in stock is negative. Therefore, combination number 1 is excluded from the selection of recommended combinations.

On the other hand, the combination number 2 in FIG. 9 is the same as the combination number 1 for the inspection IDs "0011" and "0012". On the other hand, the ampoule combination for the inspection ID "0013" in the combination number 2 is different from the case of the combination number 1 in that it is one ampoule having a capacity of 200 ml and one ampoule having a capacity of 100 ml. The initial value of the number of ampoules in stock with a capacity of 100 ml is "2" as shown in the contrast medium information IC4 in the lower part of FIG. Consider the number of stocks when combination number 2 is selected. In this case, it is the same as the combination number 1 until after the inspection of the inspection ID "0012" is completed (5th to 7th columns from the left and 5th row from the top in FIG. 9). After that, after the inspection of the inspection ID "0013" is completed, the number of ampoules in stock of 200 ml is reduced by one to 0, and the number of ampoules in stock of 100 ml is reduced by one to one (5 to 5 from the left). 7th column, 6th row from the top of FIG. 9).

Combination number 2 can be selected as a recommended combination because the number of stocks does not become negative. Hereinafter, the same applies to the combination numbers 3 to 18 shown in FIGS. 9 and 10.

The combination with the lowest total price is selected by the selection function 22d from the combination numbers 2 to 10 and 12 to 18 that satisfy the highest priority condition that the number of stocks is not negative. In the examples shown in FIGS. 9 and 10, combination number 18 satisfying the above conditions is selected.

If there are multiple ampoule combinations with the lowest total price among the ampoule combinations that satisfy the above-mentioned highest priority condition, the combination is selected based on the minimum stock quantity from among the plurality of ampoule combinations with the lowest total price. May be done. The minimum stock quantity is the combination with the lowest stock quantity of ampoules in stock for each capacity after allocating ampoules for all inspections according to the selected ampoule combination.

For example, the ampoule combination having the minimum stock quantity may be selected from a plurality of ampoule combinations that satisfy the highest priority condition and have the lowest total price. In this case, by encouraging the ordering of ampoules corresponding to the minimum stock quantity, old ampoules can be actively consumed, so that it is easy to maintain the freshness of the ampoules during storage.

Alternatively, the ampoule combination having the maximum number of minimum stocks may be selected from a plurality of ampoule combinations that satisfy the highest priority condition and have the lowest total price. In this case, it is possible to avoid the risk that the ampoule inventory corresponding to the minimum inventory quantity becomes zero.

Although an example of selecting an ampoule combination in which the inventory quantity does not become negative has been described as the highest priority condition, the selection function 22d may be configured to select a combination in which the inventory quantity does not fall below a preset threshold value. The term "in advance" here is the same as described above.

For example, if 1 is set as the threshold value of the ampoule stock quantity, the selection function 22d selects a combination in which the ampoule stock quantity does not fall below 1. In this way, if the number of stocks of each volume is always maintained at one, it is possible to deal with a case where an urgent examination occurs within a predetermined period and a specific volume of contrast medium is required.

As described above, the same effect as that of the first to third embodiments can be obtained in the fourth embodiment. In addition, in the fourth embodiment, the combination of ampoules can be collectively determined for a plurality of tests performed within a predetermined period, and the number of ampoules used within the period can be predicted. Since the number of ampoules in stock can be predicted before the actual inspection is carried out, new ampoules can be ordered in advance according to the expected number of ampoules to be used, and efficient inventory management of ampoules becomes possible.

[Fifth Embodiment]
In the fifth embodiment, in addition to the fourth embodiment, the number of ampoules in stock is updated based on the number of ampoules to be received on the scheduled arrival date provided in the middle of the predetermined period, and then the predetermined period It relates to a method of selecting the optimum ampoule combination for each inspection for a plurality of inspections performed within. Here, the predetermined period in the fifth embodiment is a period in which the ampoules are scheduled to arrive at least once within that period, unlike the fourth embodiment.

In the fifth embodiment, the code of the contrast agent management device is 100E, the code of the processing circuit is 20e, the code of the selection function is 22e, the code of the inspection information is IB5, and the code of the contrast agent information is IC5. To do.

In the fifth embodiment, the inventory status is an appropriate combination from the plurality of combinations obtained based on the recommended reserve amount of the contrast medium calculated for each of the plurality of tests performed within a predetermined period. The combination with the lowest total ampoule price is selected by the selection function 22e.

FIG. 11 is a table showing the combination 1 of the examination information, the contrast agent information, and the ampoule in the fifth embodiment. The upper left side of FIG. 11 shows the examination information IB5, the upper right side of FIG. 11 shows one combination obtained based on the recommended reserve amount shown in the examination information IB5, and the lower part of FIG. 11 shows the contrast agent information. It shows IC5.

The inspection information IB5 on the upper left side of FIG. 11 shows a list of seven inspection information scheduled to be carried out during the three days from March 1, 2016 to March 3, 2016. The inspection type and the inspection site are different for each inspection, and the inspection information IB5 on the upper left side of FIG. 11 shows an example in which the inspection type is a CT apparatus or an XA (X-ray-Angiography) apparatus. In FIG. 11, for simplification of the explanation, the case where the contrast medium A is used in all the examinations shown in the examination information IB5 will be described as an example, but in reality, each examination performed within a predetermined period will be described. The type of contrast agent used may vary.

Three inspections, inspection IDs "0014", "0015", and "0016", are scheduled for March 1, 2016, and inspection IDs "0017" and "0018" are scheduled for March 2, 2016. , And on March 3, 2016, two inspections with inspection IDs "0019" and "0020" are scheduled.

Based on the recommended reserve amount in the inspection information IB5 on the upper left side of FIG. 11, the combination of ampoules required for each inspection is calculated by the selection function 22e, respectively. Here, as an example, the combination of ampoules having the lowest total price is selected in the same manner as described above without considering the number of stocks. The upper part of FIG. 11 shows an example of a combination of ampoules having the lowest total price calculated by the selection function 22e.

As shown in the rightmost column of the table of ampoule combination 1 on the upper right side of FIG. 11, the total price of this combination is 31,000 yen. Hereinafter, a case where the ampoule combination 1 shown on the upper right side of FIG. 11 has the lowest total price as compared with other combinations will be described as an example.

The inventory fluctuation information of the combination 1 is generated by the selection function 22e based on the number of stocks of the contrast agent information IC5 shown in the lower part of FIG. 11, and it is determined whether or not the combination 1 can be provided.

The contrast agent information IC5 shown in the lower part of FIG. 11 includes information on the expected arrival date and the arrival number in addition to the stock quantity. As shown in the contrast agent information IC5, the initial values of the number of ampoules in stock having a capacity of 200 ml, a capacity of 100 ml, and a capacity of 50 ml are “5”, “2”, and “4”, respectively. The expected arrival date is March 3, 2016, and the number of ampoules with a capacity of 200 ml, a capacity of 100 ml, and a capacity of 50 ml is "10", "8", and "15", respectively.

The stock quantity after the inspection carried out on March 3, 2016, which is the scheduled arrival date, is calculated by adding the stock quantity after the inspection carried out on March 2, 2016 to the stock quantity. Hereinafter, the inventory fluctuation information of the combination 1 generated by the selection function 22e will be specifically described with reference to FIG.

FIG. 12 is a table showing inventory fluctuation information in the ampoule combination 1 according to the fifth embodiment. The inventory fluctuation information indicates the number of ampoules used for each capacity used for each inspection ID and the number of ampoules in stock for each capacity assumed after each inspection is performed.

In the contrast agent information IC5 of FIG. 11, the expected arrival date is March 3, 2016. In that case, the number of arrivals is added to the number of stocks after the number of ampoules scheduled to be used in the inspection of the inspection ID "0018" on March 2, 2016, which is the day before the scheduled arrival date, is assigned.

As shown in the fifth line from the top excluding the title line in FIG. 12, in the inspection of the inspection ID "0018" on March 2, 2016, which is the day before the scheduled arrival date, one ampoule having a capacity of 200 ml was used. One ampoule with a capacity of 50 ml is planned to be used (3rd to 5th rows from the left in FIG. 12). After allocating the number of ampoules expected to be used in the inspection of inspection ID "0018" as the ampoules to be used, the number of stocks is "0", "1", "0" in the order of capacity of 200 ml, 100 ml, 50 ml. (6th to 8th columns from the left in FIG. 12).

Before the ampoules used in the inspection on March 3, 2016 are assigned, the stock quantity is added to the stock quantity after the ampoules expected to be used in the inspection on the previous day are assigned, and the stock quantity is updated. .. Specifically, after allocating ampoules that are expected to be used in the inspection of inspection ID "0018" on March 2, 2016, the number of ampoules in stock for each capacity is "200 ml, 100 ml, 50 ml" in that order. It is "0", "1", and "0". The number of arrivals is "10", "8", and "15" in the order of capacity of 200 ml, 100 ml, and 50 ml. This number of arrivals is added to the number of stocks after allocating ampoules that are expected to be used in the inspection of inspection ID "0018", and the number of contrast media in stock after addition is "10" in the order of capacity 200 ml, 100 ml, 50 ml. , "9", "15".

Based on the updated inventory quantity, ampoules expected to be used in the inspection scheduled for March 3, 2016 will be assigned. Specifically, the inspection ID "0019" scheduled for March 3, 2016 plans to use one ampoule having a capacity of 200 ml and one ampoule having a capacity of 100 ml (FIG. 12). 3rd to 5th columns from the left, 6th row from the top). The number of ampoules scheduled to be used for inspection with inspection ID "0019" is the number of ampoules scheduled to be used for inspection of inspection ID "0019" because the number of stocks after renewal is "10", "9", and "15" in the order of capacity of 200ml, 100ml, and 50ml. When subtracted, the number of stocks is "9", "8", and "15" in the order of capacity 200 ml, 100 ml, and 50 ml (6th to 8th columns from the left in FIG. 12, 6th row from the top).

Similarly, for the inspection ID "0020", one ampoule having a capacity of 200 ml and one ampoule having a capacity of 50 ml will be used (third to fifth columns from the left in FIG. 12, 7 from the top). (Line), when these ampoules are subtracted, the stock quantity is "8", "8", and "14" in the order of capacity 200 ml, 100 ml, and 50 ml (5th to 8th columns from the left in FIG. 12, from the top). 7th line).

According to the inventory fluctuation information shown in FIG. 12, the ampoule combination 1 obtained in FIG. 11 is determined by the selection function 22e to be a combination having the lowest total price and the inventory quantity does not become negative, and is recommended. Is presented to the user as a combination of.

When the ampoule combination 1 does not satisfy the inventory condition, it is determined whether or not the inventory condition is satisfied for the ampoule combination having the next lowest price after the ampoule combination 1 in the same manner as described above. The inventory condition here means that the inventory quantity will not be negative if the expected arrival quantity at a time point earlier than the present time is taken into consideration. In this way, among the ampoule combinations that satisfy the inventory conditions, the ampoule combination having the lowest total price is selected.

As for the selection algorithm, contrary to the above method, it may be determined first whether or not the inventory condition is satisfied. That is, the selection function 22e determines whether or not the inventory condition is satisfied for all ampoule combinations based on the recommended reserve amount. The selection function 22e finally selects the ampoule combination having the lowest total price from the ampoule combinations satisfying the inventory condition.

As described above, the same effect as that of the fourth embodiment can be obtained in the fifth embodiment. In addition, in the fifth embodiment, the inventory quantity can be updated based on the arrival quantity on the scheduled arrival date, and the inventory quantity can be obtained after the scheduled arrival date based on the updated inventory quantity.

As described above, according to the contrast medium management device according to the first to fifth embodiments, the optimum ampoule combination can be selected from ampoules having different capacities according to the recommended reserve amount of the contrast medium. Since the ampoule combination is determined according to the recommended reserve amount of the contrast medium, it is desirable to calculate the recommended reserve amount more accurately. Hereinafter, in the sixth embodiment, a method of accurately calculating the recommended reserve amount of the contrast medium will be described.

[Sixth Embodiment]
A sixth embodiment relates to a method of calculating an ampoule margin amount by machine learning and a statistical method based on accumulated inspection record information, in addition to the first to fifth embodiments. The sixth embodiment is the same as the first embodiment except for the method of calculating the recommended ampoule reserve amount, so only the difference will be described.

In the sixth embodiment, the code of the contrast agent management device is 100F, the code of the processing circuit is 20f, the code of the calculation function is 21f, the code of the selection function is 22f, and the code of the inspection record information is IA6. The code of the inspection information will be described as IB6.

The amount of contrast medium used varies from test to test, depending on individual differences in the subject and the degree of progress of the test. Therefore, the recommended reserve amount prepared in the test is an amount obtained by adding a predetermined margin amount to the required amount calculated from the body weight of the subject and the like. In the first to fifth embodiments, an example of obtaining a margin amount by a fixed amount input by a user or the like before the required amount is calculated or a ratio to the required amount has been described.

In many cases, the value preset by the user or the like is an amount that has an excessive margin than the actual value. This is because it is difficult to accurately predict how much to prepare before performing the test, and avoid interruption of the test due to insufficient amount of contrast prepared. Because it has to be.

However, if the recommended reserve is excessively extra compared to the amount of contrast agent actually used in the examination, the extra ampoule will be opened and the examination cost will be high.

Therefore, in the sixth embodiment, the usage record of the contrast medium such as the amount of the contrast medium actually used in the past examination and the amount of the discarded contrast medium is accumulated, and the accumulated contrast medium usage record is accumulated. The present invention relates to a method of estimating the margin amount based on the above and calculating the recommended reserve amount of the contrast medium with high estimation accuracy.

The usage record information of the contrast medium may be stored in the storage circuit 10 as the test record information IA6, or may be stored in the storage circuit 10 as data different from the test record information IA6, for example. Hereinafter, a case where the usage record of the contrast medium is accumulated as the test record information IA6 will be described as an example.

Similar to the test record information IA1 shown in FIG. 4, the test record information IA6 has information on the type and amount of the contrast medium actually used in the test in addition to the subject information for each test ID. .. The MPPS transmitted by the injector 200 to the RIS or the like includes information such as the weight difference before and after the use of the ampoule and the volume of the contrast medium actually used in the inspection.

The contrast medium management device 100F according to the sixth embodiment includes the amount of the contrast medium actually used in the inspection collected by the injector 200, the remaining amount of the contrast medium, and the contrast medium estimated by the calculation function 21f. The required amount and the margin amount may be configured to be automatically accumulated in the inspection record information IA6.

Next, a method of calculating the recommended reserve amount of the contrast medium based on the accumulated test record information 1A6 will be described. The calculation function 21f calculates the required amount of contrast medium based on the test information IB6 of the test to be performed. At this time, the margin amount is estimated based on the accumulated inspection record information IA6. Hereinafter, in order to distinguish from the margin amount accumulated in the inspection record information IA6, the margin amount estimated before the inspection is performed will be referred to as "estimated margin amount". The estimated margin calculated by the calculation function 21f is accumulated in the inspection record information IA6 as a margin after the inspection is performed.

The estimated margin is determined by using a machine learning method or a statistical method based on the required amount of contrast medium accumulated in the test record information IA6, the amount of contrast medium actually used in the test, and the remaining amount of contrast medium. Is calculated. Hereinafter, a method of obtaining the estimated margin amount by using the back pro vacation method of the reinforcement learning method, which is one of the machine learning methods, will be described as an example.

Assuming that the margin amount is Vm, the required amount of contrast medium is Ve, the amount of contrast medium actually used in the examination is Vu, and the remaining amount of contrast medium is Vd, the remaining amount of contrast medium Vd is calculated by the following formula ( It can be expressed by 1).
[Number 1]
Vd = Ve + Vm-Vu (1)

For all of Vm, Ve, Vu, and Vd as learning targets, the margin amount after learning is Em, the required amount of contrast medium after learning is Ee, and the amount of contrast medium actually used in the examination after learning is used. The remaining amount of Eu and the contrast medium after learning is Ed, and Em, Ee, Eu, and Ed are obtained by machine learning. The learning weight variable is calculated so that it becomes 0 as much as possible when the value after learning is subtracted from the value before learning. Specifically, the learning weight variables of Ee, Eu, and Ed are set to k1, k2, and k3, respectively, and k1, k2, and k3 when the equations (2) to (4) are satisfied are obtained, respectively.
[Number 2]
Ve = k1 × Ee (2)
Vu = k2 × Eu (3)
Vd = k3 × Ed (4)

The learning weight variables k1, k2, and k3 are left so that, for example, the difference between the pre-learning data (Ve, Vu, Vd), which is the actual data, and the post-learning data (Ee, Eu, Ed) is minimized. It is calculated using the sum of squared differences.

Using the learning weight variables k1, k2, and k3 obtained in the above procedure, the margin amount Em after learning, that is, the estimated margin amount can be obtained by the following equation (5). The learning weight variables k1, k2, and k3 may have negative values.
[Number 3]
Em = k1Ve + k2Vu + k3Vd (5)

The recommended reserve amount of the contrast medium is calculated by adding the estimated margin amount calculated by the above method to the required amount estimated from the body weight of the subject and the like. If the estimated margin amount is larger than the preset margin amount, the calculation function 21f may be configured to calculate the required amount of the contrast medium using the preset margin amount.

For example, when the preset margin amount is 50 ml, the estimated margin amount is adopted when the estimated margin amount is less than 50 ml, and the preset margin amount is used when the estimated margin amount is 50 ml or more. adopt.

Alternatively, the calculation function 21f may be configured to use the estimated margin when the estimated margin reaches the accuracy preset by the user. Note that "in advance" is before the estimated margin amount is calculated by the calculation function 21f. Further, the "preset accuracy" is defined as, for example, "preset accuracy" when the calculated estimated margin is included in the range of ± 10 ml with respect to the margin of 50 ml preset by the user. You may decide that you have reached it.

When the inspection is actually performed based on the estimated margin calculated by the calculation function 21f, the estimated margin is stored in the inspection record information IA6 as the margin. The estimated margin is calculated for each inspection by the above method and is updated every time the inspection is performed. Further, since the estimated margin is calculated based on the updated inspection record information IA6, the estimation accuracy of the calculated estimated margin is gradually improved.

As described above, the same effect as that of the first embodiment can be obtained in the sixth embodiment. In addition, in the sixth embodiment, since the estimated margin amount can be calculated with high accuracy by the calculation function 21f, the amount of the contrast medium used can be reduced as a whole. Therefore, the recommended preparation amount of the contrast medium can be calculated accurately, and the remaining amount of the contrast medium can be reduced, so that the examination cost can be further reduced.

According to the contrast medium management device of at least one embodiment described above, the contrast medium can be used efficiently.

The correspondence between the terms of the claims and the embodiments is as follows, for example. The correspondence shown below is an interpretation shown for reference only, and does not limit the present invention.

The calculation function is an example of the calculation unit described in the claims. Further, the selection function is an example of the selection unit described in the claims. The recommended amount of contrast medium prepared is an example of the amount of contrast medium prepared according to the claims.

Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, as well as in the scope of the invention described in the claims and the equivalent scope thereof.

100 ... Contrast agent management device 200 ... Injector 300 ... External storage device 400 ... Modality

Claims (11)

A calculation unit that calculates the amount of contrast medium to be prepared as the sum of the required amount calculated according to the test conditions of the subject and the margin amount of the contrast medium .
The combination of each ampoule is calculated for the required amount and the margin amount, and the ampoule combination having the lowest total price is selected from the required amount combinations, while the total is selected from the margin combination. By selecting the ampoule combination with the lowest price, the ampoule combination corresponding to the required amount of the contrast agent and the ampoule corresponding to the margin amount of the contrast agent are selected separately. Selection part and
To prepare
Contrast agent management device. The calculation unit estimates the required amount of the contrast medium based on the conditions for the examination of the subject, and calculates the prepared amount of the contrast medium so as to be larger than the required amount of the contrast medium.
The contrast agent management device according to claim 1. The calculation unit calculates the required amount of the contrast medium according to the body weight of the subject to be examined.
The contrast agent management device according to claim 2. The calculation unit acquires data on the usage record of the contrast medium including the sex, age, test type, and volume of the contrast medium used in the past test, and based on the acquired data, the contrast medium Calculate the required amount,
The contrast agent management device according to claim 2 or 3. The selection unit selects the combination of the ampoules having the lowest total price of the ampoules from the combinations of the ampoules excluding the ampoules whose stock quantity is below the threshold value.
The contrast agent management device according to any one of claims 1 to 4. The calculation unit calculates the prepared amount of the contrast medium by adding a predetermined margin amount to the required amount of the contrast medium.
The contrast agent management device according to any one of claims 2 to 5. The selection unit selects the combination of the ampoules assigned to each test for the plurality of tests so that the total price of all the ampoules used in the plurality of tests is the lowest.
The contrast agent management device according to any one of claims 1 to 6. The selection unit selects a combination of the ampoules used for each of the inspections for the plurality of inspections so as to satisfy the condition that the number of ampoules in stock does not fall below the threshold value.
The contrast agent management device according to claim 7. The selection unit is used for each of the plurality of inspections so as to satisfy the condition that the stock quantity of the ampoules updated based on the stock quantity of the ampoules of the contrast medium does not fall below the threshold value. Select an ampoule combination,
The contrast agent management device according to claim 7 or 8. The selection unit selects the combination of the ampoules to be used, subject to the expiration date of the ampoule of the contrast medium.
The contrast agent management device according to any one of claims 1 to 9. The calculation unit estimates the margin amount by machine learning and statistical methods based on the usage record of the contrast medium used in the past examination, and adds the estimated margin amount to the required amount of the contrast medium. Calculate the prepared amount of the contrast medium,
The contrast agent management device according to any one of claims 2 to 10.

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