JP5244896B2 - Device for blood transfusion / infusion or blood purification and method for detecting defective suction of pump in the device - Google Patents

Description

  The present invention relates to a blood transfusion / infusion device for transfusion or infusion of blood or other fluid to a patient, or a blood purification device for purifying blood by aspiration (blood removal) from a patient's blood vessel. The present invention relates to a method for detecting when suction failure occurs in a pump for performing blood transfusion, and a device for transfusion / infusion or blood purification suitable for carrying out the method.

In general, a blood transfusion device for transfusion or infusion of blood or other fluid to a patient, or a blood purification device having a transfusion function of dialysis fluid or replacement fluid as disclosed in Patent Documents 1 and 2, As a configuration for performing infusion or blood removal, a puncture needle is attached to one end, and the puncture needle requires a transfusion or infusion bag filled with blood or other liquid or blood purification. a tube having elasticity, which is connected to the back grayed or vessel by puncturing the blood vessel of a patient, through the tube, the blood filling the back grayed or other liquid or the intravascular blood aspirated, a predetermined A pump mounted on the tube to deliver the solution to a liquid delivery destination (in a patient's blood vessel, filter of a blood purification device, etc.), and the tube is brought into close contact with the tube And a bubble sensor mounted on the suction side of the pump so that the tube and the recess are in close contact with each other, and information transmitted from the bubble sensor is received to operate the pump. A control unit for controlling.

  In blood transfusion, infusion, or blood removal by this blood transfusion / infusion or blood purification device, for example, the pump is changed by the shape change of the bag accompanying the decrease in the liquid such as blood in the bag or the coagulation of the components contained in the liquid. In this case, the liquid cannot be sucked normally and air is sucked into the tube. When such a pump suction failure occurs, it is necessary to detect it and stop the pump immediately. is there.

  When air is sucked into the tube in this way, bubbles are mixed in the liquid that passes through the tube, and conventionally, the bubbles are detected by a bubble sensor attached to the tube, By transmitting the detection information to the control unit, the control unit detects that a pump suction failure has occurred, and stops the pump.

  However, inadequate pump suction in blood transfusions, infusions or blood purification devices may be a puncture that punctures a bag or blood vessel in addition to a suction failure that involves air (bubbles) mixing into the tube as described above. Some of the components in the liquid adhere to the tip of the needle and the tip of the puncture needle is clogged.In this case, the flow of liquid from the bag or blood vessel to the tube is blocked and the suction of the liquid is Although it cannot be performed, since bubbles do not enter the tube, the conventional method of detecting bubbles mixed in the liquid passing through the tube cannot detect this suction failure of the pump. For this reason, the pump is not stopped even after the occurrence of poor suction, causing the pump to idle, resulting in a state in which blood transfusion, infusion, or blood removal cannot be performed, which impedes patient treatment.

JP-A-8-191889 Japanese Patent Laid-Open No. 11-276578

  The present invention has been made in view of such a conventional situation, and the object of the present invention is not only a suction failure that involves the mixing of bubbles into the tube, but also the conventional detection. The device for blood transfusion, infusion, or blood purification that can detect the poor suction of the pump without the mixing of bubbles into the tube due to clogging of the tip of the puncture needle, and the poor suction of the pump in the device It is to provide a detection method.

  In order to achieve the above object, according to the present invention, the following device for blood transfusion / infusion or blood purification and a method for detecting poor suction of a pump in the device are provided.

[1] A puncture needle is attached to one end, and the puncture needle is used to puncture a blood vessel or blood transfusion bag filled with blood or other liquid or a blood vessel of a patient requiring blood purification. a tube having elasticity, which is connected to the back grayed or vessel, the blood filling the back grayed or other liquid or the intravascular blood was aspirated through the tube, for feeding a predetermined feeding destination A pump mounted on the tube and a recess for tightly fixing the tube by pushing the tube, and a bubble mounted so that the tube and the recess are in close contact on the suction side of the pump A device for blood transfusion, infusion, or blood purification having a sensor and a controller that receives information transmitted from the bubble sensor and controls the operation of the pump The bubble sensor has a function of detecting bubbles mixed in the liquid passing through the tube, and when the bubbles are mixed into the liquid passing through the tube, the bubble sensor detects the bubbles. as well as detection, the tube is elastically deformed by negative pressure generated within the tube by the suction side of the pump, the features, the gap serving as an air layer when the gap is formed between the bubble sensor and the tube was detected as bubbles, and sends the detection information to the control unit, said control unit, said received detection information, of the pump caused by air bubbles are mixed into the liquid that passes through the tube An apparatus for transfusion / infusion or blood purification that detects both a suction failure and a suction failure of the pump caused by clogging of the tip of the puncture needle .

[2] The tube according to [1], wherein the tube is a soft tube that elastically deforms when a negative pressure of −50 to −400 mmHg (−6.67 to −53.33 kPa) is generated in the tube. For blood transfusion / infusion or blood purification.

[3] The device for blood transfusion / infusion or blood purification according to [1] or [2], wherein the tube has a Shore A hardness of 10 to 75 degrees.

[4] A puncture needle is attached to one end, and the puncture needle punctures a blood vessel or blood transfusion bag filled with blood or other liquid or a blood vessel of a patient who needs blood purification. a tube having elasticity, which is connected to the back grayed or vessel, the blood filling the back grayed or other liquid or the intravascular blood was aspirated through the tube, for feeding a predetermined feeding destination A pump mounted on the tube and a recess for tightly fixing the tube by pushing the tube, and a bubble mounted so that the tube and the recess are in close contact on the suction side of the pump and the sensor receives the information transmitted from the bubble sensor, the transfusion-infusion or device for blood purification and a control unit for controlling the operation of the pump In the method for detecting poor suction of the pump, the bubble sensor has a function of detecting bubbles mixed in the liquid passing through the tube, and the function allows the bubble to be detected in the liquid passing through the tube. When bubbles are mixed, the bubbles are detected, and if the suction failure of the pump occurs due to clogging of the tip of the puncture needle, negative pressure is generated in the tube on the suction side of the pump, and the tube is elastic. utilizing a phenomenon that deformation, even when the gap is formed between the bubble sensor and the tube by an elastic deformation of the tube, said gap serving as an air layer, is detected as bubbles, the control of the detection information sent to section, the control section, the received detection information, and suction failure of the pump caused by air bubbles are mixed into the liquid that passes through the tube, You sensing both suction and failure of the pump caused by clogging of the tip of the serial puncture needle, aspiration failure detection method of the pump in transfusion-infusion or device for blood purification.

[5] The tube according to [4], wherein the tube is a soft tube that elastically deforms when a negative pressure of −50 to −400 mmHg (−6.67 to −53.33 kPa) is generated in the tube. For detecting poor pump suction in blood transfusion / infusion or blood purification devices.

  According to the suction failure detection method of the present invention, when a suction failure of the pump occurs due to clogging of the tip of the puncture needle, a phenomenon is used in which a negative pressure is generated in the tube on the suction side of the pump and the tube is elastically deformed. Thus, it is possible to detect a suction failure of the pump that has not been detected in the past and is caused by clogging of the tip of the puncture needle and is not accompanied by bubbles mixed into the tube. Furthermore, the detection of the pump suction failure due to the clogging of the tip of the puncture needle can be performed by using the bubble sensor that has been conventionally used for detecting bubbles mixed in the liquid passing through the tube. Therefore, it is easy to implement and excellent in economic efficiency. Further, the device for blood transfusion / infusion or blood purification of the present invention, when the tube is elastically deformed by the negative pressure generated in the tube on the suction side of the pump, a gap is generated between the tube and the bubble sensor, Since the air bubble sensor detects the air layer as the gap as air bubbles and transmits the detection information to the control unit, the air layer can be suitably used for implementing the suction failure detection method of the present invention.

It is the schematic which shows an example of the apparatus for blood transfusion / infusion or blood purification used for implementation of the suction failure detection method of this invention. It is the schematic which shows another example of the apparatus for blood transfusion / infusion or blood purification used for implementation of the suction failure detection method of this invention. It is a schematic sectional drawing which shows the mounting state to the tube of a bubble sensor. It is principal part explanatory drawing which shows the state of the tube and bubble sensor when the suction failure of the pump resulting from clogging of the front-end | tip of a puncture needle has not arisen. It is principal part explanatory drawing which shows the state of a tube and a bubble sensor when the suction failure of the pump resulting from clogging of the front-end | tip of a puncture needle arises. It is principal part explanatory drawing which shows the method of detecting the bubble mixed in the liquid which passes the inside of a tube with a bubble sensor.

  Hereinafter, the present invention will be described based on specific embodiments, but the present invention should not be construed as being limited thereto, and based on the knowledge of those skilled in the art without departing from the scope of the present invention. Various changes, modifications, and improvements can be added.

  FIG. 1 is a schematic view showing an example of an apparatus for blood transfusion / infusion or blood purification used for carrying out the suction failure detection method of the present invention. The device 1 for transfusion / infusion or blood purification includes a tube 5, a pump 7, a bubble sensor 9, and a control unit (not shown).

In FIG. 1, the bag 3 is blood or other liquid (for example, dialysate or replenisher (replacement fluid) for replenishing body fluid components such as electrolytes removed from the patient's blood by dialysis and / or filtration). ) Is filled. The tube 5 has elasticity, and a puncture needle 11 is attached to one end thereof. By puncturing the bag 3 at the puncture needle 11, the tube 5 is connected to the back grayed 3, a state of the the tube 5 back grayed 3 is communicated. Pump 7 sucks the blood or other liquid filled in back grayed 3 through the tube 5, a predetermined feeding destination (within a patient's vessel, filter, etc. of the blood purification device) feeding to feeding to It is mounted on the tube 5 as a means. The bubble sensor 9 is provided with a recess 13 for tightly fixing the tube 5 to the tube 5 by being pushed in, and is mounted on the suction side of the pump 7 so that the tube 5 and the recess 13 are in close contact. The control unit (not shown) receives information transmitted from the bubble sensor 9 and controls the operation of the pump 7.

  FIG. 2 is a schematic view showing another example of a device for blood transfusion / infusion or blood purification used in the implementation of the suction failure detection method of the present invention. This is an example of the case where the device 1 for blood transfusion / infusion or blood purification is used for blood removal from a blood vessel 4 of a patient requiring blood purification. In this case, a puncture attached to one end of a tube 5 By puncturing the blood vessel 4 of the patient with the needle 11, the tube 5 is connected to the blood vessel 4, and the inside of the blood vessel 4 and the inside of the tube 5 are in communication with each other. The pump 7 is mounted on the tube 5 as a liquid feeding means for sucking blood in the blood vessel 4 through the tube 5 and feeding it to a predetermined liquid sending destination (such as a filter of a blood purification device). As in the example of FIG. 1, the bubble sensor 9 includes a recess 13 for tightly fixing the tube 5 by pushing the tube 5, and the tube 5 and the recess 13 are in close contact with each other on the suction side of the pump 7. It is so fitted. The control unit (not shown) receives information transmitted from the bubble sensor 9 and controls the operation of the pump 7.

Suction failure detection method of the present invention is a suction failure detection method of the pump 7 in these figures 1 and apparatus 1 for transfusion-infusion or blood purification, such as shown in FIG.

  As described above, the suction failure of the pump 7 includes the suction failure in which air is sucked into the tube 5 and bubbles are mixed in the liquid passing through the tube 5, and the tip of the puncture needle 11 punctured in the bag 3. Due to adhesion of components in the liquid and clogging of the tip of the puncture needle 11, the flow of liquid from the bag 3 to the tube 5 is blocked, and there is a suction failure that makes it impossible to suck the liquid itself.

  Among these, as shown in FIG. 6, detection of poor suction in which air is sucked into the tube 5 and bubbles are mixed in the liquid passing through the tube 5 is mixed into the liquid passing through the tube 5. This can be done by detecting the bubble 15 with the bubble sensor 9 attached to the tube 5.

  However, in the case of poor suction of the pump 7 caused by a component in the liquid adhering to the tip of the puncture needle 11 punctured in the bag 3 or the blood vessel 4 and clogging the tip of the puncture needle, air is sucked into the tube 5. In addition, since bubbles do not enter the liquid passing through the tube 5, it is impossible to detect a suction failure of the pump 7 by the method of detecting the bubbles in the liquid passing through the tube 5.

  Therefore, in the suction failure detection method of the present invention, when suction failure of the pump 7 occurs due to clogging of the tip of the puncture needle 11, negative pressure is generated in the tube 5 on the suction side of the pump 7, and the tube 5 is elastically deformed. Focusing on this phenomenon, the suction failure of the pump 7 due to clogging of the tip of the puncture needle 11 was detected using this phenomenon.

  FIG. 3 is a schematic cross-sectional view showing a state in which the bubble sensor 9 is attached to the tube 5. As shown in this figure, the bubble sensor 9 includes a recess 13 for tightly fixing the tube 5 to the tube 5 by pushing it in, and a suction failure of the pump 7 due to clogging of the tip of the puncture needle 11 occurs. When not, the tube 5 and the bubble sensor 9 are in close contact with each other as shown in FIG.

  On the other hand, when the suction failure of the roller pump 7 due to clogging of the tip of the puncture needle 11 occurs, the pump 7 is in spite of the state where the flow of liquid from the bag 3 or the blood vessel 4 to the tube 5 is blocked. By driving (rotating), a negative pressure is generated in the tube 5 on the suction side of the pump 7. When the tube 5 is elastically deformed and thinned by the negative pressure generated in the tube 5 (when the cross-sectional shape is flattened), as shown in FIG. A gap 17 is formed between the bubble sensor 9 and the bubble sensor 9.

  Originally, as shown in FIG. 6, the bubble sensor 9 is for detecting the bubble 15 when the bubble 15 is mixed in the liquid passing through the tube 5, but as shown in FIG. When a gap 17 is generated between the tube 5 and the bubble sensor 9, the air layer that is the gap 17 is detected as a bubble. This is erroneous detection from the original use of the bubble sensor (detection of bubbles), but in the suction failure detection method of the present invention, detection of the gap (air layer) 17 that is originally erroneous detection is performed. Thus, the suction failure of the pump 7 due to clogging of the tip of the puncture needle 11 is detected.

  Thus, according to the suction failure detection method of the present invention, when a suction failure of the pump 7 occurs due to clogging of the tip of the puncture needle 11, a negative pressure is generated in the tube 5 on the suction side of the pump 7, and the tube 5 By utilizing the phenomenon that the elastic deformation of the pump 7, the suction failure of the pump 7 which is not conventionally detected and which is not accompanied by bubbles mixed into the tube 5 due to clogging of the tip of the puncture needle 11 can be prevented. Can be detected. Further, in order to detect the suction failure of the pump 7 due to the clogging of the tip of the puncture needle 11, the bubble sensor 9 that has been used for detecting bubbles mixed in the liquid passing through the tube 5 is used as it is. Since it can be carried out, it is easy to implement and excellent in economic efficiency.

  In order to carry out the defective suction detection method of the present invention, the tube 5 constituting the device 1 for blood transfusion / infusion or blood purification has elasticity, and the pump is caused by clogging of the tip of the puncture needle 11. When a suction failure 7 occurs and a negative pressure is generated in the tube 5 on the suction side of the pump 7, it needs to be elastically deformed.

  The “deformation” in the “elastic deformation” referred to herein is 20 μm or more between the tube 5 and the bubble sensor 9 which are in close contact with each other in the initial state (a state where no negative pressure is generated in the tube 5). It means a change in the cross-sectional shape accompanied by a decrease in the cross-sectional area (including the area of the opening) of the tube 5 that causes a gap (air layer) 17.

  As a specific characteristic of the tube 5, it is preferable that the tube 5 is elastically deformed when a negative pressure of −50 to −400 mmHg (−6.67 to −53.33 kPa) is generated in the tube 5. More preferably, it is elastically deformed when a negative pressure of -100 to -350 mmHg (-13.00 to -45.50 kPa) is generated therein.

  In a hard tube that does not elastically deform even when a negative pressure of -400 mmHg (-53.33 kPa) is generated in the tube, the negative pressure in the tube is not affected even if the suction of the pump is poor due to clogging of the tip of the puncture needle The tube may not be elastically deformed due to the above, and the suction failure may not be detected. In blood transfusion and blood removal, if a high negative pressure exceeding −400 mmHg is generated in the tube, components in the blood in the tube may be destroyed (blood cells are destroyed and hemolyzed).

  On the other hand, in a tube that is too soft and elastically deforms even when a small negative pressure less than −50 mmHg (−6.67 kPa) is generated in the tube, there is a poor suction of the pump due to clogging of the tip of the puncture needle. Even if not, it may be elastically deformed, and erroneous detection is likely to occur.

  The ease of elastic deformation of the tube can be adjusted by the material, thickness, diameter, etc. of the tube. In the suction failure detection method of the present invention, the material of the tube is not particularly limited as long as it has the above-described characteristics. For example, polyacrylate resins such as polymethyl methacrylate, polycarbonate resins, poly Polyvinyl halide resins such as vinyl chloride, polyamide resins, polyolefin resins such as polyethylene, polypropylene, and poly (4-methylpentene-1) are preferable materials. Moreover, there is no restriction | limiting in particular also about the outer diameter of a tube, However, It is preferable to set it as about 2-7 mm, and it is more preferable to set it as about 5-6 mm.

  On the suction side of the pump 7, the bubble sensor 9 attached to the tube 5 was used to detect bubbles contained in the liquid flowing in the tube in a conventional blood transfusion / infusion or blood purification device. A known bubble sensor, for example, an ultrasonic bubble sensor that detects the presence or absence of bubbles based on the difference in the transmittance of ultrasonic waves between a liquid and bubbles (air) can be preferably used. In general, such a bubble sensor can detect even a minute bubble having a size of about 20 μm, and when used in the suction failure detection method of the present invention, it is between the tube 5 and the bubble sensor 9. This can be detected when a gap (air layer) 17 of 20 μm or more is formed on the surface.

  The bubble sensor 9 that detects a gap (air layer) 17 generated between the tube 5 and the bubble sensor 9 transmits the detection information to a control unit (not shown). And the control part which received this detection information detects that the suction failure of the pump 7 generate | occur | produced with the said information, and stops the operation | movement of the pump 7 or issues an alarm as needed.

  As shown in FIG. 3, the bubble sensor 9 is provided with a recess 13 for tightly fixing to the tube 5 by pushing the tube 5. The width W of the recessed portion 13 into which the tube is pushed is set to be slightly smaller than the outer diameter of the tube 5 because it needs to be in close contact with the tube 5 in an initial state (a state in which no negative pressure is generated in the tube 5). For example, when the outer diameter of the tube 5 is 5 mm, the width W of the portion into which the tube 5 of the recess 13 is pushed is preferably about 3 mm. If the dimension of the outer diameter of the tube 5 and the width W of the portion into which the tube 5 of the recess 13 is pushed is such a relationship, when the tube 5 is pushed into the recess 13, the bubble sensor 9 and the tube are caused by the elasticity of the tube 5. 5 can be brought into close contact with each other.

  The pump 7 mounted on the tube 5 has a known pump that has been used as a liquid feeding means in a conventional blood purification device or the like, for example, a rotor having a plurality of rollers attached to the outer periphery. Hold the tube used for infusion between the rotor and the inner periphery of the housing that houses the rotor, and roll the tube in the length direction while the roller crushes the tube as the rotor rotates. Thus, a roller pump configured to feed the liquid in the tube can be suitably used.

The device for blood transfusion / infusion or blood purification according to the present invention is a device for blood transfusion / infusion or blood purification that can be suitably used to carry out the suction failure detection method according to the present invention described so far. As shown in FIG. 1 and FIG. 2, the basic configuration is that a puncture needle 11 is attached to one end, and the puncture needle 11 is filled with blood or other liquids (dialysis fluid, replacement fluid, etc.). a tube 5 having elasticity which is connected to the back grayed 3 or vascular 4 by puncturing the blood vessel 4 in a patient in need of blood transfusions or bag 3 or blood purification for infusion was being filled to back grayed 3 through the tube 5 Pump 7 mounted on the tube 5 in order to suck the collected blood or other liquid or blood in the blood vessel 4 and send it to a predetermined liquid delivery destination (in the patient's blood vessel, a filter of a blood purification device, etc.) And push tube 5 The bubble sensor 9 is provided with a recess 13 for tightly fixing the tube 5 to the tube 5 so that the tube 5 and the recess 13 are in close contact with each other on the suction side of the pump 7, and information transmitted from the bubble sensor 9 is And a control unit (not shown) for receiving and controlling the operation of the pump 7.

  The main feature of the device for blood transfusion / infusion or blood purification according to the present invention is that the tube 5 is elastically deformed by the negative pressure generated in the tube 5 on the suction side of the pump 7, so that the space between the tube 5 and the bubble sensor 9 is When a gap is formed in the air gap, the air bubble sensor 9 detects the air layer as the gap as a bubble, and transmits the detection information to the control unit, so that the control unit pumps 7 due to clogging of the tip of the puncture needle 11. It is in the point of detecting that the suction failure is generated. In the blood transfusion / infusion or blood purification apparatus of the present invention, the bubble sensor 9 is generated between the tube 5 and the bubble sensor 9 as well as the bubbles mixed in the liquid passing through the tube 5 as described above. The gap (air layer) is also detected as a bubble, and the detection information is transmitted to the control unit. Therefore, the gap (air layer) is preferably used to implement the suction failure detection method of the present invention described above. be able to.

  As described above, in order to carry out the suction failure detection method of the present invention, the tube 5 constituting the device 1 for blood transfusion / infusion or blood purification has elasticity, and the tip of the puncture needle 11 is clogged. Therefore, when the suction failure of the pump 7 occurs and a negative pressure is generated in the tube 5 on the suction side of the pump 7, it is necessary to be elastically deformed.

  From this point of view, when the negative pressure of −50 to −400 mmHg (−6.67 to −53.33 kPa) is generated in the tube 5, the tube 5 used in the blood transfusion / infusion or blood purification apparatus of the present invention is generated. It is preferably a soft tube that elastically deforms, and it is a soft tube that elastically deforms when a negative pressure of −100 to −350 mmHg (−13.00 to −45.00 kPa) is generated. Is more preferable. If such a soft tube is used as the tube 5, a suction failure of the pump 7 occurs due to clogging of the tip of the puncture needle 11, and when the negative pressure is generated in the tube 5 on the suction side of the pump 7, it is almost certain. It is elastically deformed. Then, due to this elastic deformation, as shown in FIG. 5, a gap 17 is formed between the tube 5 and the bubble sensor 9, and the bubble sensor 9 detects this gap (air layer) 17, and the detection information is obtained. By transmitting to the control unit, the control unit detects that a suction failure of the pump 7 has occurred due to clogging of the tip of the puncture needle 11.

  In a hard tube that does not elastically deform even when a negative pressure of -400 mmHg (-53.33 kPa) is generated in the tube, the negative pressure in the tube is not affected even if the suction of the pump is poor due to clogging of the tip of the puncture needle The tube may not be elastically deformed due to the above, and the suction failure may not be detected. In blood transfusion and blood removal, if a high negative pressure exceeding −400 mmHg is generated in the tube, components in the blood in the tube may be destroyed (blood cells are destroyed and hemolyzed).

  On the other hand, in a tube that is too soft and elastically deforms even when a small negative pressure less than −50 mmHg (−6.67 kPa) is generated in the tube, there is a poor suction of the pump due to clogging of the tip of the puncture needle. Even if not, it may be elastically deformed, and erroneous detection is likely to occur.

  Examples of the soft tube that can satisfy the above-described characteristics include a tube having a Shore A hardness of 10 to 75 degrees, and if the tube has a Shore A hardness of 20 to 70 degrees, the tube is more reliably used. Can meet the characteristics. Preferred embodiments of the material and outer diameter of the tube used in the blood transfusion / infusion or blood purification apparatus of the present invention, and elements (such as bubble sensors) other than the tube constituting the blood transfusion / infusion or blood purification apparatus of the present invention These are the same as the aspects described in the description of the suction failure detection method of the present invention.

  Note that the bubble sensor in the conventional blood transfusion / infusion or blood purification device is intended exclusively to detect bubbles mixed in the liquid passing through the tube. The generation of a gap with the bubble sensor must be avoided because it causes false detection (the gap is detected as a bubble). Therefore, unlike the blood transfusion / infusion or blood purification apparatus of the present invention, the conventional blood transfusion / infusion or blood purification apparatus has a negative pressure (−400 mmHg) that is generated in the tube due to clogging of the tip of the puncture needle. A hard tube (a tube having a Shore A hardness of 76 degrees or more) is used that does not elastically deform at a negative pressure (about a negative pressure) and can maintain a close contact state with the bubble sensor.

  The present invention relates to a blood transfusion / infusion device for transfusion or infusion of blood or other fluid to a patient, or a blood purification device for purifying blood by aspiration (blood removal) from a patient's blood vessel. It can be used as a method for detecting when a suction failure occurs in the pump for performing the operation, and a device for blood transfusion / infusion or blood purification suitable for carrying out the method.

1: device for blood transfusion / infusion or blood purification, 3: bag, 4: blood vessel, 5: tube, 7: pump, 9: bubble sensor, 11: puncture needle, 13: recess, 15: bubble, 17: gap ( Air layer).

Claims (5)

One end needle is mounted on the back grayed at the puncture needle, by blood or other liquids to puncture the blood vessel of a patient in need of bags or blood purification for transfusion or infusion filled or a tube having elasticity, which is connected to the vessel, the tube the blood is sucked in the blood or other liquid or the vessel filled to back grayed, in order to feed the predetermined liquid transfer destination through the tube A bubble sensor mounted on the pump and a recess for tightly fixing the tube by pushing the tube, and mounted on the suction side of the pump so that the tube and the recess are in close contact with each other; A device for transfusion, infusion, or blood purification having a controller that receives information transmitted from the bubble sensor and controls the operation of the pump;
The bubble sensor has a function of detecting bubbles mixed in the liquid passing through the tube, and detects bubbles when bubbles are mixed into the liquid passing through the tube. , the tube is elastically deformed by negative pressure generated within the tube by the suction side of the pump, when the gap is formed between the bubble sensor and the tube also, the gap serving as an air layer, bubble was detected as, and sends the detection information to the control unit,
When the control unit receives the detection information and bubbles are mixed in the liquid passing through the tube, the pump suction failure and the pump suction failure caused by clogging of the tip of the puncture needle A device for blood transfusion, infusion, or blood purification that detects both .   2. The blood transfusion according to claim 1, wherein the tube is a soft tube that elastically deforms when a negative pressure of −50 to −400 mmHg (−6.67 to −53.33 kPa) is generated in the tube. Device for infusion or blood purification.   The device for blood transfusion / infusion or blood purification according to claim 1 or 2, wherein the tube has a Shore A hardness of 10 to 75 degrees. One end needle is mounted on the back grayed at the puncture needle, by blood or other liquids to puncture the blood vessel of a patient in need of bags or blood purification for transfusion or infusion filled or a tube having elasticity, which is connected to the vessel, the tube the blood is sucked in the blood or other liquid or the vessel filled to back grayed, in order to feed the predetermined liquid transfer destination through the tube A bubble sensor mounted on the pump and a recess for tightly fixing the tube by pushing the tube, and mounted on the suction side of the pump so that the tube and the recess are in close contact with each other; receives information transmitted from the bubble sensor, the transfusion-infusion or device for blood purification and a control unit for controlling the operation of the pump A suction failure detection method of the serial pump,
The bubble sensor has a function of detecting bubbles mixed in the liquid passing through the tube, and detects bubbles when bubbles are mixed into the liquid passing through the tube. When the pump suction failure occurs due to clogging of the tip of the puncture needle, a negative pressure is generated in the tube on the suction side of the pump, and the tube is elastically deformed. when the gap between the bubble sensor and the tube caused by deformation, the gap serving as an air layer, is detected as bubbles, and sends the detection information to the control unit,
Wherein the control unit is, the received detection information, and suction failure of the pump caused by air bubbles are mixed into the liquid that passes through the tube, the suction failure of the pump caused by clogging of the tip of the puncture needle detect both the suction defect detection method of the pump in the transfusion-infusion or device for blood purification.   5. The transfusion / transfusion according to claim 4, wherein the tube is a soft tube that elastically deforms when a negative pressure of −50 to −400 mmHg (−6.67 to −53.33 kPa) is generated in the tube. A method for detecting poor suction of a pump in an infusion or blood purification apparatus.

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