CN111870769A

CN111870769A - Epidural analgesia device and control method thereof

Info

Publication number: CN111870769A
Application number: CN202010844185.XA
Authority: CN
Inventors: 闫思俊
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-20
Filing date: 2020-08-20
Publication date: 2020-11-03
Also published as: CN111420165A

Abstract

The application relates to an epidural analgesia device and a control method thereof, the epidural analgesia device comprises an analgesia pump host and a liquid storage bag device, the liquid storage bag device comprises a first liquid storage bag, a second liquid storage bag, a liquid storage bag shell, a first connecting pipe, a second connecting pipe, a three-way valve and a main connecting pipe, the three-way valve comprises a three-way valve shell and a three-way valve inner shaft, the analgesia pump host comprises a controller, a parameter input device, a detection device, an alarm device, a display device, a three-way valve motor, a power extrusion component and a shutoff mechanism, the first liquid storage bag and the second liquid storage bag are fixed in the liquid storage bag shell, the first liquid storage bag and the second liquid storage bag are respectively connected to the three-way valve through the first connecting pipe and the second connecting pipe, an outlet of the three-way valve is connected with one side of the main connecting pipe, the main connecting pipe is, the motor shaft of the three-way valve is matched with the inner shaft of the three-way valve. The structure is simple and convenient, the cost is low, and the application range is wide.

Description

Epidural analgesia device and control method thereof

Technical Field

The present application relates to an epidural analgesic device and a control method thereof, which are mainly suitable for appropriately adjusting and supplying the concentration and the dosage of an analgesic drug.

Background

At present, medical staff continuously pumps local anesthetic with a certain concentration to an epidural space of a vertebral column of a human body by using an analgesic pump in clinical work and is used for analgesia after painless childbirth or operation. As labor progresses and time after surgery increases, the intensity of the painful stimulus becomes stronger or weaker. The anesthesia experts commonly know that the concentrations of the common drugs for epidural delivery analgesia are 0.0625-0.15% of ropivacaine and 0.04-0.125% of bupivacaine, while the concentrations of the local anesthetic prepared in the existing analgesia pump are fixed, the proper concentrations of the needed anesthetic of patients have certain difference due to individual difference, the needed anesthesia depth is in a changing state, and the clinical effects of painless delivery and postoperative analgesia cannot be met simply by adjusting the volume of the local anesthetic pumped by the analgesia pump. When the concentration of local anesthetic is higher, the motor function of the patient is blocked after the operation, which is not beneficial to the early-stage bed getting activity of the patient and even influences the patient to defecate independently. For the lying-in woman, the muscle contraction function of the lying-in woman is influenced, so that the labor capacity is insufficient, the labor process is prolonged, and even the spontaneous labor fails to increase the probability of cesarean section operation; when the local anesthesia concentration is lower, the sensory nerve block is incomplete, the pain of a patient is caused, and even the operation incision is cracked. The best effect of painless delivery cannot be achieved. Therefore, the pain-relieving pump applied at the present stage is difficult to satisfy patients or doctors. There is a clinical urgent need for an epidural analgesic device that can regulate the concentration and volume of local anesthetic.

Epidural anesthesia is the most effective method for delivery analgesia, delivery analgesia is currently performed from the active stage of the first labor stage, and the latent stage, namely delivery analgesia, is considered to prolong the second labor stage and increase the probability of cesarean delivery. However, the long latency brings intolerable pain to most puerperae, so that the puerperae has nervous and anxious mood, has more obvious stress response and is unfavorable for both mothers and infants, the analgesia of the puerperae in the situation that the puerperae cannot tolerate the pain can possibly cause adverse effect on the whole delivery process, and even the puerperae can be changed into cesarean section because the puerperae cannot tolerate the pain. Therefore, an epidural analgesia pump with adjustable local anesthesia medicine concentration is urgently needed, the delivery analgesia is performed by administering the local anesthesia medicine with low concentration in the latent period of the delivery, and the local anesthesia medicine concentration is subsequently adjusted along with the progress of the labor process, so that the pain of the puerpera is relieved, the labor process is not prolonged, and the labor process is even shortened.

Disclosure of Invention

The technical problem solved by the application is to overcome the defects in the prior art, and provide an epidural analgesic device and a control method thereof, wherein the epidural analgesic device has the advantages of simple structure, convenience in use, low cost, high automation degree and good effect.

The technical scheme adopted by the application for solving the technical problems comprises the following steps: the utility model provides an epidural analgesia device, including analgesia pump host computer, characterized by still is provided with the stock solution bag device, the stock solution bag device includes stock solution bag one, stock solution bag two, the stock solution bag shell, connecting pipe one, connecting pipe two, the three-way valve, total connecting pipe, stock solution bag one, stock solution bag two is made by the softwood matter, total connecting pipe corresponds power extrusion subassembly, a detection device, shutoff mechanism part is made by elastic material, the three-way valve includes the three-way valve shell, axle in the three-way valve, the axle is equipped with the hole that is used for communicateing one of two passageways of three-way valve or shutoff three-way valve in the three-way valve, analgesia pump host computer includes the controller, parameter input device, a detection device, an alarm device, a display device, the three-way valve motor, power extrusion subassembly, shutoff mechanism, stock solution bag one, stock solution bag two, The second connecting pipe is connected to the three-way valve, the outlet of the three-way valve is connected with one side of the main connecting pipe, the other side of the main connecting pipe is connected with the injector or the epidural catheter, the three-way valve, the first connecting pipe and the second connecting pipe are fixed on the shell of the liquid storage bag, the power extrusion component is used for extruding the liquid medicine in the main connecting pipe to be quantitatively conveyed to the epidural catheter, the shutoff mechanism is used for stopping the passage from the main connecting pipe to the epidural catheter, the liquid storage bag device and the analgesia pump host are arranged on a special frame, the liquid storage bag device is clamped on the analgesia pump host, the power extrusion component, the detection device and the shutoff mechanism are, the controller is connected with the parameter input device, the detection device, the alarm device, the display device, the three-way valve motor, the power extrusion assembly and the shutoff mechanism and controls the operation of the parameter input device, the detection device, the alarm device, the display device, the three-way valve motor, the power extrusion assembly and the shutoff mechanism according to the control logic.

This application still is provided with total connecting pipe extension pipe, and total connecting pipe opposite side sets up total connecting pipe interface, and total connecting pipe passes through total connecting pipe interface and syringe or total connecting pipe extension union coupling, can set up filtration on the total connecting pipe extension pipe, and epidural catheter is connected to total connecting pipe extension pipe rear end.

The parameter input device comprises a digital input key, a start key, a liquid medicine adding key, an exhaust key and a confirmation key, wherein the digital input key is used for parameter setting, the start key is used for starting and stopping operation of pumping, the liquid medicine adding key is used for temporarily adding set liquid medicine with one adding amount in a parameter input process and an automatic pumping process (the middle of two adjacent pumping periods and the middle of two anesthesia processes in the automatic pumping process can have idle time periods), the exhaust key is used for exhausting the set concentration liquid medicine with set exhaust capacity and air in the liquid medicine (the middle of the liquid medicine is not provided with the idle time periods), the exhaust key is used for exhausting the set concentration liquid medicine with the set exhaust capacity and the air in the liquid medicine (the middle of the liquid medicine is provided with the exhaust process, the exhaust process is continuously pumped and the middle of the liquid medicine is not provided with the idle time periods), and the, after inputting the data by the digital input key in the parameter input process, the confirmation key needs to be pressed to confirm the input data.

The front part of an inner hole of the three-way valve corresponds to the first connecting pipe or the second connecting pipe or corresponds to the inner wall of the three-way valve between the first connecting pipe and the second connecting pipe, the rear part of the inner hole of the three-way valve is provided with an arc-shaped cavity, and the arc-shaped cavity is always (in all three states) correspondingly communicated with the main connecting pipe.

This application the three-way valve hole still can be for following the arcuation recess that the three-way valve shell inner wall extends, and the arc angle that the arcuation recess corresponds is less than the arc angle between connecting pipe one, the connecting pipe two, and the arc angle that the arcuation recess corresponds is greater than the arc angle between connecting pipe one, the total connecting pipe, and the arc angle that the arcuation recess corresponds is greater than the arc angle between total connecting pipe, the connecting pipe two.

The application is also provided with a main connecting pipe clamp which is used for switching off or opening the communication of the main connecting pipe and the main connecting pipe extension pipe (connecting the epidural catheter).

The detection device is a sensor, and the three-way valve motor adopts a stepping motor or a servo motor.

The technical scheme adopted by the application for solving the technical problems comprises the following steps: the control method of the epidural pain relieving device comprises the following steps:

the liquid storage bag device and the analgesia pump host are installed: the analgesia pump main machine is installed on the special machine frame, the liquid storage bag device is installed on the connection surface of the analgesia pump main machine, so that the power extrusion assembly, the detection device and the shutoff mechanism respectively correspond to the main connection pipe, and a motor shaft of the three-way valve is clamped with an inner shaft of the three-way valve;

inputting parameters: the controller of the analgesia pump host inputs the anesthesia process quantity, each anesthesia process parameter, an additional parameter, an exhaust parameter and an anesthesia medicine quantity limiting parameter through the parameter input device, and calculates the minimum integer ratio of the pumping times of the solution A and the solution B in the pumping period after a confirmation key is pressed; if necessary, the interface of the main connecting pipe is connected with the extension pipe of the main connecting pipe (the step can be carried out in the installation step of the device), the exhaust is automatically carried out by pressing an exhaust button, and the main connecting pipe is communicated with the epidural catheter;

automatic pumping: pressing a starting key, performing one or more preset anesthesia processes until the anesthesia processes are completed, and if the key is pressed, turning to the key processing step;

in each process (applicable to an exhaust process, a liquid medicine adding process and a general anesthesia process), the controller controls the motor of the three-way valve to adjust the inner shaft of the three-way valve, the shutoff mechanism and the power extrusion component to realize the concentration adjustment of local anesthesia liquid medicine and the pump injection to the epidural catheter in each anesthesia process;

if the key operation exists in the steps of parameter input and automatic pumping, the controller transfers the key operation process to carry out key processing according to specific situations:

in the automatic pumping step, a digital input key, an exhaust key and a confirmation key are ignored (the original process is continued, the same is applied below, if the digital input key, the exhaust key and the confirmation key are not considered), if the digital input key is a starting key (the starting key is pressed for the second time, namely the stop is performed), the automatic pumping step is stopped, and the parameter input step is returned;

and in the automatic pumping step, if a liquid medicine adding key is pressed and liquid medicine is added once according to the liquid medicine adding parameters without violating the limitation of the anesthetic dosage, adding or inserting a liquid medicine adding process in an idle time period between the current anesthetic process and the next anesthetic process or an idle time period of the current anesthetic process.

If the confirmation key is not pressed in the parameter input step, disregarding the exhaust key, the liquid medicine additional key and the start key; if the confirmation key is pressed, the exhaust key is pressed to perform an exhaust process; if the exhaust key is not pressed in the parameter input process, the liquid medicine additional key and the starting key are ignored; after the exhaust button is pressed, the liquid medicine adding button is pressed to perform a liquid medicine adding process, and the automatic pumping step is performed after the start button is pressed.

Each process comprises the following steps:

s0: the controller sets an upper limit i and an upper limit j according to the minimum integer ratio of the pumping times of the solution A and the solution B in one pumping period, wherein i = 0; j = 0; initial state of the pumping process: the three-way valve is closed, the shut-off mechanism is closed, and the power extrusion component is opened (an extrusion main connecting pipe);

s1: the controller controls a three-way valve motor to communicate the solution A with the main connecting pipe through a three-way valve for pumping once, the power extrusion assembly is closed, the solution A with the primary pumping amount flows into the main connecting pipe, and the three-way valve is closed, i + 1; opening the turn-off mechanism, opening the power extrusion component, and enabling the primary pump injection solution A to flow into the epidural space; the shut-off mechanism is closed, and the power extrusion assembly is closed;

s2: if i does not reach the upper limit of i and j does not reach the upper limit of j, the controller controls a three-way valve motor to communicate the B solution with a main connecting pipe through a three-way valve and pump the B solution for one time, the power extrusion assembly is closed, the B solution with the primary pumping amount flows into the main connecting pipe, the three-way valve is turned off, a turn-off mechanism is turned on, j +1 is turned on, the power extrusion assembly is turned on, the B solution with the primary pumping amount flows into an epidural space, the turn-off mechanism is turned off, the power extrusion assembly is;

if i does not reach the upper limit of i and j reaches the upper limit of j, then go to S1;

if i reaches the upper limit of i and j reaches the upper limit of j, determining whether the pumping cycle is completed,

setting i =0 if the pumping cycle is not completed; j = 0; changing to S1 when the upper limit of i is not changed and the upper limit of j is not changed;

if the pumping cycle is completed, judging whether all the pumping cycles in the process are completed or not,

if all the pumping periods in the process are finished, the three-way valve is closed, and the shutoff mechanism is closed;

if the controller does not finish all the pumping periods in the process to judge that the upper limit parameters of i and j of the next pumping period are unchanged,

if the upper limit of I and the upper limit of j are not changed, I =0 is set; j = 0; the upper limit of i is not changed, the upper limit of j is not changed, and the step S1 is switched after the time of the next pump injection period is waited;

i =0 if the I upper limit and the j upper limit are changed; j = 0; the controller sets the new upper limit of i and the new upper limit of j, and then goes to step S1 after waiting for the next pump cycle time.

The anesthesia device has the advantages that the exhaust process, the liquid medicine adding process and the general anesthesia process are all set to be the general processes, all the processes are configured in a building block mode, an operator can operate and control the anesthesia device very easily, the anesthesia scheme can be adjusted flexibly and conveniently, and the application range is improved.

Compared with the prior art, the application has the following advantages and effects: the structure is succinct, convenient to use, and is with low costs, and degree of automation is high, and convenient incessant many anesthesia process designs, and the application is wide, and the painless childbirth of epidural retardation, postoperative analgesia anesthesia are particularly useful for.

Drawings

Fig. 1 is a schematic configuration diagram of an analgesia pump host according to an embodiment of the present application.

Fig. 2 is a schematic diagram of a reservoir device according to an embodiment of the present disclosure.

Fig. 3 is a schematic view of the connection (working) surface of the analgesia pump host and the liquid bag device according to the embodiment of the present application.

FIG. 4 is a schematic diagram of a three-way valve according to an embodiment of the present disclosure, illustrating a first connection pipe communicating with a main connection pipe.

Fig. 5 is a schematic view of a three-way valve according to an embodiment of the present invention, illustrating a state where a second connection pipe is connected to a main connection pipe.

Fig. 6 is a schematic view illustrating a state in which the three-way valve is not in communication with the first connection pipe and the second connection pipe according to the embodiment of the present disclosure.

Fig. 7 is a schematic view of an operating state of the embodiment of the present application.

Fig. 8 is a schematic view of another three-way valve according to the embodiment of the present invention, which is used to connect a first connection pipe with a main connection pipe.

Fig. 9 is a schematic view of another three-way valve according to an embodiment of the present invention, in which a second connection pipe is connected to a main connection pipe.

Fig. 10 is a schematic view illustrating a state where the three-way valve is not in communication with the first connection pipe and the second connection pipe according to another embodiment of the present disclosure.

Detailed Description

The present application will be described in further detail below with reference to the accompanying drawings by way of examples, which are illustrative of the present application and are not limited to the following examples. The front and back are referred to the flow direction of the liquid chemical.

Referring to fig. 1 to 10, the present embodiment includes an analgesic pump main unit and a liquid storage (drug solution or physiological saline) bag device. The liquid storage bag is a disposable article and comprises a first liquid storage bag A, a second liquid storage bag B, a liquid storage bag shell 15, a first connecting pipe 3, a second connecting pipe 4, a three-way valve (two-in one-out valve) 16, a main connecting pipe 13, a main connecting pipe clamp 13B and a main connecting pipe extension pipe 18, wherein the liquid storage bag (comprising the first liquid storage bag A and the second liquid storage bag B) is made of soft materials, and the main connecting pipe 13 is made of elastic materials (local parts of the liquid storage bag A and the second liquid storage bag B can be made of hard materials). The three-way valve 16 is composed of a three-way valve outer shell 16a and a three-way valve inner shaft 16b (provided with an inner hole 16c for communicating one of two channels of the three-way valve or switching off the three-way valve), the three-way valve inner shaft 16b can only be positioned in one of three states of switching on a first connecting pipe 3 or switching on a second connecting pipe 4 or not switching on the two connecting pipes through a limiting structure (the existing gear structure), the three-way valve 16 has two realization structures, the first structure is shown in figures 4-6, the front part (the left side of figure 6) of the inner hole 16c of the three-way valve is corresponding to the first connecting pipe 3 or the second connecting pipe 4 or corresponding to the inner wall of the three-way valve 16 between the first connecting pipe 3 and the second connecting pipe 4, the rear part (the. Referring to fig. 8 to 10, another structure of the three-way valve 16 is the same in basic structure, and the inner hole of the three-way valve is not the through hole + the arc groove penetrating the three-way valve 16 in the former structure, but only the arc groove 16d extending along the inner wall of the three-way valve housing 16a, that is, the arc groove part at the rear of the former structure. In the second case, when the arc-shaped groove 16d of the inner shaft 16b of the three-way valve rotates to a position between the first connecting pipe 3 and the second connecting pipe 4 (fig. 10), the three-way valve 16 is not communicated with the first connecting pipe 3 and the second connecting pipe 4; when the arc-shaped groove 16d of the inner shaft 16b of the three-way valve rotates to correspond to the first connecting pipe 3 and the main connecting pipe 13 (fig. 8), the three-way valve 16 is communicated with the first connecting pipe 3; when the arc-shaped groove 16d of the three-way valve inner shaft 16b is rotated to correspond to the second connection pipe 4 and the main connection pipe 13 (fig. 9), the three-way valve 16 communicates with the second connection pipe 4.

The first liquid storage bag A is usually used for containing high-concentration local anesthetic drugs, the second liquid storage bag B is used for containing low-concentration local anesthetic drugs or pure physiological saline, the second liquid storage bag B and the first liquid storage bag A contain the same local anesthetic drugs when the local anesthetic drugs are contained in the second liquid storage bag B, the local anesthetic drugs with any concentration can be a mixture of the physiological saline and the local anesthetic drugs, and analgesic drugs can be contained in each liquid storage bag.

The first liquid storage bag A and the second liquid storage bag B are respectively connected with the three-way valve 16 through the first connecting pipe 3 and the second connecting pipe 4, the outlet of the three-way valve 16 is connected with the main connecting pipe 13, the main connecting pipe 13 is controlled by the three-way valve 16, at most only one connecting pipe is communicated with the main connecting pipe 13 in any state, when the analgesia pump host outputs (pumps out) medicines, the shaft 16B in the three-way valve rotates to the inner hole 16c of the three-way valve to align to the first connecting pipe 3 and between the second connecting pipes 4 (in a figure 6 state), the three-way valve 16 is turned off at the moment, the main connecting pipe 13 is provided with the interface 13a in a plug-in type (through the main connecting pipe extension pipe 18 or directly) to be connected to the epidural catheter or the injector 17, the medicines. Then an analgesia pump host and a liquid storage device are installed, a main connecting pipe 13 is connected with a main connecting pipe extension pipe 18, the machine is started, parameters are set, the air is automatically exhausted by pressing an exhaust key, the epidural catheter is communicated after the air is exhausted, and the machine starts to work by pressing a start key. The controller realizes automatic transfusion through a three-way valve motor, a shutoff mechanism 12 and a power extrusion assembly 10 (the main connecting pipe clamp 13b is always in an open state and can be shut off unless medicine pumping is not needed), a port 13a (see figure 7) of the main connecting pipe 13 is communicated to a main connecting pipe extension pipe 18 during automatic transfusion, and the main connecting pipe extension pipe 18 is communicated with an epidural catheter (connected to a patient). The three-way valve 16, the first connecting pipe 3, the second connecting pipe 4 and part of the main connecting pipes (including the corresponding sensor 11, the power extrusion assembly 10 and the part of the main connecting pipes of the shutoff mechanism 12) are fixed on the liquid storage bag shell 15.

The parameter input device comprises a digital input key, a starting key, a liquid medicine adding key, an exhaust key and a confirmation key, wherein the digital input key is used for parameter setting, the starting key is used for starting and stopping operations (starting once and stopping for the second time) of pump injection, and the liquid medicine adding key is used for manual intervention in a parameter input process and an automatic pump injection process and temporarily adding the set liquid medicine. The present embodiment automatically adds a medicine by pressing a medicine liquid adding button once, and then continues the original flow after completion. The additional chemical liquid, the additional chemical liquid process time and the additional (chemical liquid) amount are input at the time of setting, namely, the additional parameters. The chemical solution adding button is suitable for two cases: 1. in the automatic pumping process, the pain of the patient is aggravated, and the patient presses the button under the permission of the doctor, so that the medicine is automatically added (usually, the medicine is added in the idle time period of the current anesthesia process, and when the idle time period between the current anesthesia process and the next anesthesia process is not enough, the next anesthesia process is delayed until the liquid medicine adding process is completed, and then the medicine is added); 2. in the parameter input process, after the confirmation key and the exhaust key are pressed, a doctor considers that the set anesthetic process has low dosage (particularly, all default parameters do not need to be changed, and only one or more than two liquid medicine adding processes need to be added to meet the requirement, because the parameters do not need to be input at the moment, only a few liquid medicine adding processes need to be added, and the method is simple and quick), and one or more than two liquid medicine adding processes need to be added. When the parameters of the application are input, an anesthetic dosage limit parameter can be set, namely the maximum anesthetic dosage in a certain time period is set, the sum of the pure anesthetic dosage converted from the additional liquid medicine amount and the automatic pump liquid medicine injection amount in any time period must be within the anesthetic dosage limit range (for example, 0.2% ropivacaine does not exceed 20 milliliters per hour), and when the sum exceeds the anesthetic dosage limit range, the button is added according to the liquid medicine, so that the button is invalid. The time period refers to the process time of adding liquid medicine once or the anesthesia process time in the automatic pumping process, for example, the automatic pumping process is divided into three processes, the first process time is 4 hours, the anesthesia dosage is limited to 0.2 percent ropivacaine and is not more than 20 milliliters per hour, the set first process anesthesia dosage is 0.2 percent ropivacaine and is 10 milliliters, and the continuous pumping is finished in the first hour in the first process; the anesthetic dosage of the second process is limited to 0.2 percent ropivacaine and is not more than 15 milliliters per hour after 6 hours of the second process, the set anesthetic dosage of the second process is 20 milliliters of 0.2 percent ropivacaine, and continuous pumping is completed in the first two hours in the second process; the third process is 12 hours, the anesthetic dosage is limited to 0.2 percent ropivacaine and is not more than 10 milliliters per hour, the set anesthetic dosage of the third process is 20 milliliters of 0.2 percent ropivacaine, and the third process is completed uniformly (the injection amount of the liquid medicine pump is the same in each hour, but the middle time is a time period without pumping injection); if the second process is carried out to the 100 th minute, the anesthetic pumping completion time is 20 minutes away from the second process, and at this time, a doctor (or a patient does not feel the doctor's consent) thinks that the anesthetic dosage needs to be added and presses a liquid medicine adding button, then the liquid medicine adding process is automatically carried out for two hours after the pumping time of the second process is completed, the liquid medicine adding process time is one time, the set anesthetic dosage is more than half an hour, and continuous pumping completion is carried out in the liquid medicine adding process for one time, the liquid medicine adding process can be carried out for at most more than one time in the second process, and if the total anesthetic dosage allows, the second process is left for 20 minutes when the liquid medicine adding button is pressed, the liquid medicine adding process is carried out first, and the liquid medicine adding process is carried out for the third process (namely, the third process is carried out for 10 minutes). If a certain anesthesia process is not continuously pumped, inserting a liquid medicine adding process in the idle time period of the anesthesia process, and if the subsequent pumping cycle of the anesthesia process cannot be carried out on time due to the fact that the liquid medicine adding process is inserted, the subsequent pumping cycle is not carried out, and the parameter is not manually adjusted. If the parameters need to be modified manually after starting, pressing a second starting key, resetting the parameters and then starting. The air release button defaults to release air according to the first anesthesia procedure mixed liquid C, and selects one of fixed air release capacities (such as 1ml, 2ml and 3 ml) by using the number input button in the parameter input process. When the air needs to be exhausted, the air exhaust button is pressed to start automatic air exhaust. The confirming key is used for realizing the function of confirming the digital input, after the data is input by the digital input key during the parameter input, the confirming key is required to be pressed to confirm the input data, the digital input key, the exhaust key and the confirming key are ignored in the process of pumping (namely, the three key operations are regarded as misoperation, no reason is taken, the same is carried out below), and only the starting key and the liquid medicine adding key can be operated; if the confirmation button is not pressed in the parameter input process, the exhaust button, the liquid medicine additional button and the start button are ignored; if the exhaust key is not pressed (namely the confirmation key is pressed and the exhaust key is pressed) in the parameter input process, the liquid medicine additional key and the starting key are ignored, and the error caused by mistaken touch of the key is prevented.

The working process of the application is as follows:

firstly, liquid medicine is manually input into a liquid storage bag (a liquid storage bag A and a liquid storage bag B):

when the first liquid storage bag A is used for preparing the A-concentration local anesthetic X, the main connecting pipe clamp 13b is opened, the inner shaft 16b of the three-way valve is manually adjusted, the first connecting pipe 3 is communicated with the main connecting pipe 13 (the second connecting pipe is in a closed state), a syringe is connected with the interface 13a of the main connecting pipe to inject a quantitative local anesthetic X stock solution into the first liquid storage bag A, then a quantitative physiological saline solution is injected according to the requirement (when the requirement does not exist, the step is the same as the following step), and the syringe is used for evacuating the gas in the first liquid storage bag A and the first connecting pipe 3, so that bubbles return to a connecting port between the three; and manually adjusting the three-way valve 16, opening the second connecting pipe 4 and the main connecting pipe 13 (the first connecting pipe 3 is closed), preparing B concentration local anesthetic X, connecting an injector through a main connecting pipe interface 13a to inject quantitative local anesthetic X into the second liquid storage bag B, injecting quantitative normal saline according to requirements, evacuating the second liquid storage bag B and the second connecting pipe 4 through the injector to enable the bubbles to return to the second connecting port of the three-way valve 16 and the second connecting pipe 4, turning off the three-way valve 16, and closing the main connecting pipe clamp 13B. If necessary, analgesic can be added into the bag.

Secondly, mounting of a liquid storage bag device and an analgesia pump host:

the analgesia pump host is installed on a special rack (not shown in the figure), the liquid storage bag device is installed on the connection surface of the analgesia pump host (the liquid storage bag device is separated from the analgesia pump host when liquid medicine is prepared, and the liquid storage bag device is moved to the working surfaces of the liquid storage bag device and the analgesia pump host after the liquid medicine is prepared, so that the power extrusion assembly 10, the sensor 11 and the shutoff mechanism 12 are respectively located at the corresponding position of the main connecting pipe 13 shown in the figure 4 and can respectively play the roles of extruding, detecting and shutting off the main connecting pipe 13), and a motor shaft of the three-way valve is connected with a.

Inputting parameters (including calculation):

the controller of the analgesia pump host inputs the number of anesthesia processes, parameters of each anesthesia process (the infusion amount and the proportion of various components of the anesthesia process, the time of the anesthesia process, the liquid medicine (A or B or the mixture C of A and B) added by pressing a liquid medicine adding key each time, the time of adding a liquid medicine process and an adding (liquid medicine) amount (adding parameters) and the times, time, distribution and pumping amount of each pumping period, the concentration of exhaust liquid medicine and the exhaust volume (exhaust parameters, the concentration of the first anesthesia process of the default mixed liquid C and 2 ml) and the limitation parameters of the anesthetic dosage through a parameter input device, the distribution of each pumping period refers to how all the pumping periods are distributed in one anesthesia process, for example, m + n ml liquid medicine needs to be input into a patient in a certain anesthesia process, the pumping amount of each pumping period is 1ml, so that m + n pumping periods are needed in total, the pumping cycles are uniformly distributed in an anesthesia process or are set in a certain time period of the anesthesia process, the pumping cycle is normally set in the first half time period of the anesthesia process, for example, the first 1/3 time period, if necessary, the liquid medicine can be added in the following idle time period through a liquid medicine adding button, or the liquid medicine can be added between the two pumping cycles through the liquid medicine adding button), and the minimum integer ratio of the pumping times of the solution A and the solution B in the pumping cycle (corresponding to the local anesthetic concentration C input by the patient) is calculated. The pump cycle is related to the minimum adjustment volume, and the sum of the times of pumping the 0.05 concentration liquid medicine and the 0.15 concentration liquid medicine in the table one is 10, so that any concentration adjustment (10 concentrations) in the table one can be realized, and the device is 0.05ml per pumping (i.e. one pumping volume, the same applies hereinafter), so that the minimum volume of which the concentration can be adjusted is 0.05 × 10=0.5 ml. Then we set the pump-out capacity to be an integer x 0.5ml, and the sum of the times of pumping 0.05 concentration liquid medicine and 0.15 concentration liquid medicine in table three is 20, so that any concentration adjustment (20 concentrations) in table three can be realized, the device pumps 0.05ml once, and then the minimum capacity of concentration adjustment is 0.05 x 20=1 ml. Then we can set the pump out capacity to an integer x 1 ml. And calculating the input quantity of the first liquid storage bag A and the input quantity of the second liquid storage bag B according to the parameters. If the anesthesia process needs to be performed three times, for example, for a pregnant woman, three stages of prenatal anesthesia, midnatal anesthesia and postnatal anesthesia recovery (or parameters are manually adjusted as required) need to be performed, the controller sets the number of the anesthesia processes to three, and each parameter of the anesthesia process needs to be input. The pumping rate can be calculated based on the time of the pumping cycle and the amount of one pump shot, and is typically in the range of 0.02 ml/sec to 0.15 ml/sec. Then the main connecting pipe interface 13a is communicated with the main connecting pipe extension pipe 18, the main connecting pipe clamp 13b is opened, and the exhaust button is pressed, so that the air is automatically exhausted in the embodiment, the controller enables the set exhaust liquid storage bag to be communicated with the main connecting pipe 13 by controlling the three-way valve motor, the shutoff mechanism 12 and the power extrusion assembly 10, and liquid and air in a rear pipeline (a three-way valve inner shaft 16c, the main connecting pipe 13 and the main connecting pipe extension pipe. After the exhaust is finished, the controller controls the three-way valve 16 to be closed, the shutoff mechanism 12 is closed (namely the main connecting pipe 13 is shut off), the power extrusion component 10 is unchanged (namely the power extrusion component is still in a state of extruding the main connecting pipe 13), the main connecting pipe extension pipe 18 is connected to the epidural catheter, and the set pump injection work is started according to a start button.

Fourthly, automatic pumping:

the controller controls a three-way valve motor to adjust an inner shaft 16b of the three-way valve, the shutoff mechanism 12 and the power extrusion assembly 10 to realize the concentration adjustment of the local anesthetic and the pumping speed V to pump and inject the local anesthetic into the patient. The basic frequency of the analgesia pump host machine controlling the three-way valve 16 is consistent with that of the shutoff mechanism 12 (power extrusion component 10), the three-way valve 16 controls the first connecting pipe 3, the second connecting pipe 4 and the main connecting pipe 13 to be alternately blocked and communicated, and the local anesthetic with the concentration of C can be automatically generated to the main connecting pipe 13. The following detailed description is given with respect to an anesthesia procedure:

suppose a C concentration local anesthetic is produced. Assuming that m ml of the solution a, n ml of the solution B are needed, and the power extrusion assembly 10 pumps 0.05ml once, and one pumping cycle is 20 times, the power extrusion assembly 10 pumps (m + n)/X times, and when X is 0.05ml, the power extrusion assembly 10 pumps (m + n) × 20 times, and the controller may calculate that the solution a is pumped several times per 20 times of pumping according to the ratio of m to n so that the ratio of the final solution a to the solution B is m: n (the solution A and the solution B are alternately switched on and off, the solution with the larger of m and n is switched on firstly, for example, if m: n is 3:2, the solution A is switched on for the first time, the solution B is switched on for the second time, if m: n is 3:2, 20 times of pumping are carried out, the pump A is carried out for 12 times, and the pump B is carried out for 8 times). If the error is larger, one or more than 20 pumps immediately following the 20 pumps can be adjusted, for example if the A solution is larger, the A solution can be decreased once and/or the B solution can be increased once in the subsequent 20 pumps; if the A solution is slightly processed similarly); for example m =30 ml: n =20 ml, m: n is 3:2, the three-way valve 16 is used for conducting and closing the solution A for 3 times and then conducting and closing the solution B for 2 times every 20 times of pumping, and the three times are alternately carried out, so that the local anesthetic with the concentration of C is generated and is delivered to the main connecting pipe 13, the main connecting pipe extension pipe 18 (the main connecting pipe extension pipe 18 can be provided with a filtering structure 18 a) and the epidural catheter.

S0, as an example of the pumping process of the solution A and the solution B, the three-way valve 16 is closed in the initial pumping state, the shutoff mechanism 12 is closed (namely the main connecting pipe 13 is closed), and the power extrusion assembly 10 is opened (namely the main connecting pipe 13 is extruded). Assuming m =30 ml: n =20 ml, the power extrusion assembly 10 pumps 0.05ml at a time, the ratio of the pumping times of the solution A to the solution B is 3:2, and i =0 is set firstly; j = 0; the upper limit of i is 3, and the upper limit of j is 2 (if the upper limit of i is larger than the upper limit of j, the principle can be the same by pumping the solution B first and then pumping the solution A).

S1: the controller controls a three-way valve motor to communicate the solution A with the main connecting pipe 13 through a three-way valve 16 and pump for one time, the power extrusion assembly 10 is closed (in a state of not extruding the main connecting pipe 13), a predetermined amount of the solution A flows into the main connecting pipe 13, and the three-way valve 16, i +1 is switched off; the shut-off mechanism 12 is opened (i.e. the main connecting pipe 13 is not shut off), the power extrusion component 10 is opened, the local anesthetic injected by the primary pump A flows into the epidural space, the shut-off mechanism 12 is closed, and the power extrusion component 10 is closed.

S2: if i does not reach the upper limit (3) and j does not reach the upper limit (2), the controller controls a three-way valve motor to communicate the B solution with a main connecting pipe 13 through a three-way valve 16 for pumping once, the power extrusion assembly 10 is closed, a predetermined amount of the B solution flows into the main connecting pipe 13, the three-way valve 16 is closed, j +1 is opened, a closing mechanism 12 is opened, the power extrusion assembly 10 is opened, the local anesthetic for pumping once flows into an epidural space, the closing mechanism 12 is closed, the power extrusion assembly 10 is closed, and S1 is switched;

if i does not reach the upper limit (3) and j reaches the upper limit (2), then go to S1;

if i reaches the upper limit (3) and j reaches the upper limit (2), it is determined whether the pumping cycle is completed (in this example, 20 times per pumping cycle are completed),

setting i =0 if the pumping cycle is not completed; j = 0; i upper limit 3, j upper limit 2, go to S1;

if the pump injection period is completed, judging whether all the pump injection periods in the anesthesia process are completed or not,

if all the pump injection periods in the anesthesia process are finished, the three-way valve 16 is closed, the shutoff mechanism 12 is closed, and the anesthesia process is exited;

if the controller does not finish all the pumping cycles in the anesthesia process to judge that the upper limit parameters of i and j of the next pumping cycle are not changed,

if the upper limit of I and the upper limit of j are not changed, I =0 is set; j = 0; i, upper limit 3, j, upper limit 2, and turning to the step S1 after waiting for the next pumping cycle time;

When a plurality of anesthesia processes are needed, the working process of the method is similar, at the moment, after one anesthesia process is completed, the anesthesia process is reset according to the parameters of the next anesthesia process, when the solution A or the solution B needs to be added again, the steps S0-S2 are added, and when the solution A or the solution B does not need to be added, the steps S0-S2 are directly switched to complete the next anesthesia process until all the anesthesia processes are completed.

The controller can be provided with multiple schemes of required local anesthetic drug concentration and pump injection speed, and each scheme can be automatically adjusted or manually adjusted after a set time period.

The three-way valve 16 can be powered by a stepping motor or a servo motor and controlled by a controller; the three-way valve 16 may also be manually adjusted to dispense the medication. After the analgesic pump host is prepared, the exhaust can be performed manually or under the control of a controller.

The controller is the brain of the whole system, intelligently controls and manages the whole system, processes detection signals and is completed by a CPU control circuit board. The main machine of the analgesia pump is the heart of the whole system and is a power source for pumping liquid.

The detection device is mainly various sensors which are arranged according to requirements, such as an infrared sensor (which is responsible for detecting the flow velocity and the flow quantity of liquid), a pressure sensor (which is responsible for detecting blockage and leakage) and an ultrasonic sensor (which is responsible for detecting bubbles), and the like, and the detection signals sensed by the sensors are amplified and then sent to a controller for signal processing, so as to obtain a control instruction and then carry out corresponding control operation. The present embodiment includes at least a sensor 11.

An alarm device: the signal sensed by the sensor is processed by the microcomputer to obtain an alarm control signal, and then the alarm device responds to the alarm control signal to attract the attention of medical personnel and simultaneously carry out correct processing. Mainly comprises a photoelectric alarm (a light emitting diode), a sound alarm (a loudspeaker and a buzzer) and the like. And (4) alarming: air bubbles, blockage, unclosed door, finished pumping, low battery voltage and abnormal stop.

Parameter input device and display device: the parameter input device is responsible for setting various parameters of the pump, such as the amount and concentration of the first liquid storage bag A and the second liquid storage bag B, the pump speed and concentration, the time and the like. The display device is responsible for displaying all parameters, the current working state and the like, and adopts an LED nixie tube and an LCD liquid crystal display for displaying.

A power supply device: a direct current power supply is adopted.

The main engine of the analgesia pump is the analgesia pump with adjustable drug concentration and capacity, so that the bad stimulation received by painless delivery parturients and postoperative patients is minimized. The patient can use the narcotic analgesics with different concentrations in different time intervals, an effective analgesic scheme is achieved, and the analgesic device is a scientific design which is close to clinical practice and has strong practicability.

Tables 1 and 2 show that 0.05ml of local anesthetic is pumped out of the power extrusion assembly 10 per extrusion. Prepared by 10 parts (namely a pump injection period of 10), the lowest pumped capacity of the main machine of the analgesic pump is 10 multiplied by 0.05=0.5ml, and the minimum parameter for adjusting the pumped liquid is 0.5ml, which is consistent with the lowest adjusting capacity of the existing analgesic pump.

Table 1-the solution a and the solution B are local anesthetic solutions with concentrations of 0.15% and 0.05%, respectively, and the preparation ratio of the solution C is prepared by 10 parts:

。

table 2-the solution a and the solution B are local anesthetic solutions with concentrations of 0.16% and 0.06%, respectively, and the preparation ratio of the solution C is prepared by 10 parts (pump cycle):

tables 3 and 4 show that 0.05ml of local anesthetic was pumped out of the powered extrusion assembly 10 per extrusion. Prepared by 20 parts (namely a pump injection period of 20), the lowest pumped capacity of the analgesia pump host is 20 multiplied by 0.05=1ml, and the minimum parameter for adjusting the pump outflow is 1ml, so that the clinical requirement can be met.

Table 3-the solution a and the solution B are local anesthetic solutions with concentrations of 0.15% and 0.05%, respectively, and the preparation ratio of the solution C is prepared according to 20 parts (the final data in the table are percentages):

table 4-a solution is a local anesthetic solution with a concentration of 0.2%, B solution is physiological saline, and 20 parts of C solution are prepared (the final data in the table are percentages):

all simple variations and combinations of the technical features and technical solutions of the present application are considered to fall within the scope of the present application.

Claims

1. The utility model provides an epidural analgesia device, including analgesia pump host computer, characterized by still is provided with the stock solution bag device, the stock solution bag device includes stock solution bag one, stock solution bag two, the stock solution bag shell, connecting pipe one, connecting pipe two, the three-way valve, total connecting pipe, stock solution bag one, stock solution bag two is made by the softwood matter, total connecting pipe corresponds power extrusion subassembly, a detection device, shutoff mechanism part is made by elastic material, the three-way valve includes the three-way valve shell, axle in the three-way valve, the axle is equipped with the hole that is used for communicateing one of two passageways of three-way valve or shutoff three-way valve in the three-way valve, analgesia pump host computer includes the controller, parameter input device, a detection device, an alarm device, a display device, the three-way valve motor, power extrusion subassembly, shutoff mechanism, stock solution bag one, stock solution bag two, The second connecting pipe is connected to the three-way valve, the outlet of the three-way valve is connected with one side of the main connecting pipe, the other side of the main connecting pipe is connected with the injector or the epidural catheter, the three-way valve, the first connecting pipe, the second connecting pipe is fixed on the shell of the liquid storage bag, the power extrusion component is used for extruding the liquid medicine in the main connecting pipe to be quantitatively conveyed to the epidural catheter, the shutoff mechanism is used for stopping the passage from the main connecting pipe to the epidural catheter, the liquid storage bag device and the analgesia pump host are installed on the special frame, the liquid storage bag device is connected to the analgesia pump host in a clamping mode, the power extrusion component, the detection device and the shutoff mechanism are matched with the main connecting pipe, a motor shaft of the three-way valve is matched with a shaft in the three.

2. The epidural pain relief device according to claim 1, wherein: the parameter input device comprises a digital input key, a start key, a liquid medicine adding key, an exhaust key and a confirmation key, wherein the digital input key is used for parameter setting, the start key is used for starting and stopping pumping, the liquid medicine adding key is used for temporarily adding set liquid medicine with once adding amount in the parameter input process and the automatic pumping process, the exhaust key is used for exhausting the set concentration liquid medicine with set exhaust capacity and air in the liquid medicine, and the confirmation key is used for realizing the function of confirming the digital input.

3. The epidural pain relief device according to claim 2, wherein: the front part of an inner hole of the three-way valve corresponds to the first connecting pipe or the second connecting pipe or corresponds to the inner wall of the three-way valve between the first connecting pipe and the second connecting pipe, and the rear part of the inner hole of the three-way valve is provided with an arc-shaped cavity which is always communicated with the main connecting pipe correspondingly.

4. The epidural pain relief device according to claim 1, wherein: the three-way valve hole is the arcuation recess that extends along three-way valve shell inner wall, and the radian angle that the arcuation recess corresponds is less than the radian angle between connecting pipe one, the connecting pipe two, and the radian angle that the arcuation recess corresponds is greater than the radian angle between connecting pipe one, the total connecting pipe, and the radian angle that the arcuation recess corresponds is greater than the radian angle between total connecting pipe, the connecting pipe two.

5. The epidural pain relief device according to claim 1, wherein: the epidural catheter is also provided with a main connecting pipe extension pipe, the other side of the main connecting pipe is provided with a main connecting pipe interface, the main connecting pipe is connected with the injector or the main connecting pipe extension pipe through the main connecting pipe interface, the main connecting pipe extension pipe is provided with a filtering structure, and the rear end of the main connecting pipe extension pipe is connected with the epidural catheter.

6. The epidural pain relief device according to claim 1 or 5, wherein: the device is also provided with a main connecting pipe clamp which is used for switching off or opening the communication between the main connecting pipe and the epidural catheter.

7. The method for controlling an epidural pain relieving device according to any one of claims 2 to 6, which comprises the following steps:

inputting parameters: the controller of the analgesia pump host inputs the number of anesthesia processes, parameters of each anesthesia process, additional parameters and exhaust parameters through the parameter input device, calculates the minimum integer ratio of the pumping times of the solution A and the solution B in the pumping period after pressing the confirmation key, automatically exhausts air according to the exhaust key, and the main connecting pipe is communicated with the epidural catheter;

automatic pumping: pressing a starting key to perform a set process until the process is completed; if a key is pressed, the key processing step is switched;

in the automatic pumping process, the digital input key, the exhaust key and the confirmation key are not taken care of, if the key is a start key, the automatic pumping process is stopped, and the parameter input process is returned;

if a liquid medicine adding key is pressed down and liquid medicine is added for one time according to the liquid medicine adding parameters in the automatic pumping process without violating the limitation of the anesthetic dosage, adding or inserting a liquid medicine adding process in an idle time period between the current anesthetic process and the next anesthetic process or the idle time period of the current anesthetic process;

8. The method of controlling an epidural pain-relieving device according to claim 7, wherein: each process comprises the following steps:

s0: the controller sets an upper limit i and an upper limit j according to the minimum integer ratio of the pumping times of the solution A and the solution B in one pumping period, wherein i = 0; j = 0; initial state of the pumping process: the three-way valve is closed, the shut-off mechanism is closed, and the power extrusion assembly is opened;