Infusion bag auxiliary device and method for constructing temperature and pressure control model

Abstract

The application provides a transfusion auxiliary device for a transfusion bag and a method for constructing a temperature and pressure control model, and belongs to the technical field of medical auxiliary instruments. The transfusion auxiliary device for the transfusion bag comprises a bag-shaped body, a pressure adding part, a pressure sensor, a heating part, a first temperature sensor, a second temperature sensor, a temperature and pressure preset assembly, a control part, a display screen and a power supply part. After presetting a transfusion rate and temperature, the transfusion auxiliary device indirectly pressurizes and heats the transfusion bag through the pressure adding part and the heating part. The whole process is automatically processed according to the preset temperature and transfusion rate signals and the temperature and transfusion rate data are directly displayed on the display screen. The application fits an empirical model of three variables by measuring the relationship among the temperature value, the pressure value and the transfusion rate value, and the accuracy of the model is higher than that of a theoretical model calculated by a physical method and the model is easy to realize.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical auxiliary equipment, and particularly relates to an infusion auxiliary device for an infusion bag and a method for constructing a temperature and pressure control model. Background Art

[0002] At present, clinical intravenous infusions all use disposable infusion sets and mostly use infusion bags. However, in clinical practice, it is often encountered that special critically ill patients need to speed up the infusion speed during rescue or treatment. However, when the regulating valve is opened to the maximum, the flow rate cannot meet the requirement, which brings great inconvenience to the rescue and treatment work. At the same time, for patients in special conditions (such as shock patients, elderly and weak patients, patients with heavy blood loss, etc.) and / or in low ambient temperatures, the process of injecting the low-temperature liquid in the infusion bag into the patient's vein may cause the patient to suffer from hypothermia (hypothermia), which in turn poses a certain risk to the patient's life safety.

[0003] In order to solve the above problems, the methods / devices commonly used at present are as follows:

[0004] (1) Use a warm water bath to preheat the infusion bag to increase the infusion temperature of the infusion bag; a dedicated person squeezes the infusion bag to speed up the infusion rate of the infusion bag.

[0005] (2) Referring to the prior art Chinese patent CN112245710A, a disposable infusion bag with an interlayer is used, and the gas generated by the reaction between chemical agents quickly inflates the interlayer of the disposable infusion bag, thereby pressurizing the liquid in the infusion bag and accelerating the infusion rate.

[0006] (3) Referring to the prior art Chinese patent CN105411846A, an electric heating layer is provided around the periphery of the infusion bag to heat the liquid medicine in the infusion bag.

[0007] (4) Referring to the prior art Chinese patent CN112089925B, an automatically blocked heating and pressurized infusion device is used, which controls the temperature by wrapping a heater and a temperature sensor in the middle section of the infusion tube, and increases the pressure of the infusion bag wrapped inside by pressurizing the pressurized bag, thereby increasing the flow rate of the infusion bag.

[0008] However, the above existing methods / devices for accelerating the infusion rate of the infusion bag and increasing the infusion temperature have the following problems:

[0009] (1) The method of heating the infusion bag in a warm water bath and squeezing the infusion bag is time-consuming and labor-intensive. The preheated infusion bag will gradually cool down over time, and there is still a risk of causing hypothermia symptoms in the patient receiving the infusion. The method of squeezing the infusion bag cannot accurately match the infusion rate.

[0010] (2) Chinese patent CN112245710A is a disposable pressurized infusion bag, which cannot be reused, wastes resources, and is not environmentally friendly. Its pressurization method (the gas generated by the chemical reaction quickly inflates the interlayer of the infusion bag to pressurize the liquid in the infusion bag) is too rapid, and the pressurization amplitude during the pressurization process is uncontrollable, and it is impossible to maintain stable pressurized infusion for a long time. At the same time, the pressure increase of the device and the degree of enhancement of the infusion rate of its infusion bag cannot be displayed intuitively. Since the gas generated by the chemical reaction is a fixed amount, the pressurization amplitude is also a fixed value, which is only applicable to specific infusion scenarios. It is impossible to change the pressurization amplitude of the infusion bag according to the patient's actual physical condition and urgency, nor can it adjust the accelerated infusion rate of the infusion bag. At the same time, the device does not have a heating function.

[0011] (3) Chinese patent CN105411846A provides a heatable infusion bag, which is a disposable product and is discarded after the infusion is completed, resulting in serious waste of resources. The device can only adjust the heating power, but cannot visually observe the actual heating temperature corresponding to the infusion bag, resulting in the inability to match the adjusted heating power and the heating temperature, which makes it difficult to accurately control the heating temperature of the infusion bag. At the same time, the device does not have a pressurization function.

[0012] (4) Chinese patent CN112089925B controls the temperature by wrapping a heater and a temperature sensor in the middle section of the infusion tube. When the infusion rate is too fast, the heater wrapped in the middle section of the infusion tube often cannot efficiently heat the liquid medicine in the infusion tube, resulting in a certain difference between the actual infusion temperature and the expected temperature. Moreover, since the heater is wrapped in the middle section of the infusion tube (it cannot be wrapped at the end of the infusion tube, which will affect the patient's intravenous needle insertion), the middle section of the infusion tube is still a certain distance away from the patient's intravenous end, and this distance will still cause temperature loss. At the same time, the device cannot set the accurate infusion temperature and the accurate infusion rate, nor can it correlate and match the infusion temperature and the infusion rate (when the infusion rate is different, the temperature loss in the infusion tube is different). Summary of the Invention

[0013] The present invention is made to solve the above-mentioned problems, and its purpose is to provide an infusion auxiliary device for an infusion bag and a method for constructing a temperature and pressure control model.

[0014] The present invention provides an infusion auxiliary device for an infusion bag, which has the following characteristics: a bag-shaped body, having an opening at one end along the axial direction for the infusion bag to be embedded therein, and a through hole at the other end for the infusion port of the infusion bag to pass through; a pressurizing member connected to the bag-shaped body, for adjustable pressurization of the infusion bag embedded in the bag-shaped body, with a pressurizing power of w1; a pressure sensor disposed inside the bag-shaped body, for measuring the pressure applied to the infusion bag in real time and outputting a corresponding pressure signal P输液袋 A heating element is connected to the bag-like body and is used to heat the infusion bag embedded in the bag-like body with adjustable power, and its heating power is w2; a first temperature sensor is arranged inside the bag-like body and is used to measure the temperature of the infusion bag in real time and output a corresponding first temperature signal T2; a second temperature sensor is used to measure the room temperature of the environment in which the bag-like body is located in real time and output a corresponding second temperature signal T3; a temperature and pressure preset component includes a temperature preset component and a pressure regulating component, which are respectively used for the user to adjust the preset temperature T1 of the liquid in the infusion bag when it enters the patient's vein and the preset infusion rate v of the infusion bag 预设 The control unit is connected to the pressurizing member, the pressure sensor, the heating member, the first temperature sensor, the second temperature sensor and the temperature and pressure preset component. The control unit pre-stores a temperature and pressure control model, and the temperature and pressure control model is based on v 预设 and P 输液袋 Control the size of w1 so that the actual infusion rate of the infusion bag reaches v 预设 The temperature and pressure control model is based on T1, T2, T3 and P 输液袋 Control the size of w2 so that the actual temperature of the liquid in the infusion bag reaches T1 when it is delivered to the patient's vein; the display screen is connected to the control unit and is used to display v in real time 预设 , specific values ​​of T1, T2 and T3; and a power supply unit, which is connected to each power consumption unit of the infusion auxiliary device for the infusion bag and supplies power to it.

[0015] The infusion auxiliary device for the infusion bag provided by the present invention may also have the following features: wherein, each of the two axial side surfaces of the bag-like body has a hollow interlayer, and the two hollow interlayers form a first airbag and a second airbag respectively, and the pressurizing member is an air pump, which is connected to the first airbag and / or the second airbag, and is used to inflate air therein so that the two axial side surfaces of the bag-like body expand and thereby squeeze the infusion bag.

[0016] The infusion auxiliary device for an infusion bag provided by the present invention may also have the following features: wherein the first airbag and the second airbag are not connected to each other, the first airbag and the second airbag are respectively connected to the air pump through pipelines, and the air is supplied and pressurized by the air pump.

[0017] The infusion auxiliary device for the infusion bag provided by the present invention may also have the following features: the first airbag and the second airbag are connected through at least one passage passing through the bag-shaped body layer, and at least one of the first airbag or the second airbag is connected to the air pump through a pipeline.

[0018] The infusion auxiliary device for the infusion bag provided by the present invention may also have the following features: wherein, the heating element includes heating wires, which are evenly and densely distributed on the two axial side surfaces inside the bag-shaped body, and are used to heat the infusion bag embedded in the bag-shaped body.

[0019] The infusion auxiliary device for the infusion bag provided by the present invention may also have the following features: wherein, the heating element also includes a heat-distributing film, which is arranged on the two axial side surfaces inside the bag-shaped body and covers the surface of the electric heating wire. When the infusion bag is embedded in the bag-shaped body, the two heat-distributing films are covered on the two axial side surfaces of the infusion bag. The heat-distributing film is used to evenly conduct the heat generated by the electric heating wire to the medicine in the infusion bag. The first temperature sensor is arranged on the side of the heat-distributing film that contacts the infusion bag, and the second temperature sensor is not in direct contact with the bag-shaped body.

[0020] The infusion auxiliary device for an infusion bag provided by the present invention may also have the following features: wherein the display screen, the temperature preset component, the pressure regulating component, the second temperature sensor and the control part are integrated on the same operating unit.

[0021] The infusion auxiliary device for the infusion bag provided by the present invention may also have the following features: at least part of the bag-shaped body is a transparent area, which is used for medical staff to observe the delivery of the liquid medicine in the infusion bag in real time, and the bag-shaped body has an open end with a hanging ring for hanging at a desired position.

[0022] The present invention also provides a method for constructing a temperature and pressure control model, which has the following characteristics and is used to construct any of the above-mentioned temperature and pressure control models, comprising the following steps: S10, selecting an infusion bag of fixed volume and its corresponding infusion tube of fixed length and diameter; S20, obtaining the actual infusion rate v of the infusion bag through actual measurement. 实际 The pressure P 输液袋 Multiple sets of corresponding values ​​​​of v 实际 and P 输液袋 The smooth curve relationship P is obtained by fitting multiple groups of corresponding numerical values 输液袋 =f1(v 实际 ), since the temperature and pressure control model controls the pressurization amplitude of the pressurizing part, the actual infusion rate v 实际 With the preset infusion rate v 预设 Same, so when P 输液袋 Less than v 预设 When the preset pressure value of the corresponding infusion bag is reached, the pressure piece needs to be continuously pressurized, so the pressure control method of the temperature and pressure control model can be obtained, that is: when P 输液袋 <f1(v 预设 ), w1>0; S30, the temperature loss during the process of delivering the liquid in the infusion bag to the patient's vein through the infusion tube is recorded as ΔT, and ΔT is regarded as only related to v 实际 , T2 and T3, and multiple groups of actual tests were conducted by controlling single factor variables, and it was found that ΔT and v 实际 , T2 and T3 and fit them to obtain a smooth four-dimensional surface relationship ΔT=f2(v 实际, T2, T3); S40, w2 is determined by the preset temperature T4=T1+ΔT and T2 of the infusion bag, a single factor variable is controlled to carry out a plurality of actual tests, a plurality of corresponding numerical values of w2, ΔT, T1 and T2 are obtained, and a smooth four-dimensional surface relationship w2=f3(ΔT, T1, T2) is obtained by fitting, then w2=f3(ΔT, T1, T2)=f3[f2(v 实际 , T2, T3), T1, T2, T4>T2]; S50, the temperature and pressure control model is constructed: In the formula, v 实际 is calculated reversely by P 输液袋 . 实际

[0023] In the method for constructing the temperature and pressure control model, the plurality of corresponding numerical values can be fitted by using MATLAB software.

[0024] Effects of the application

[0025] According to the infusion auxiliary device for the infusion bag and the method for constructing the temperature and pressure control model, the infusion auxiliary device for the infusion bag comprises: a bag-shaped body, one end of which is provided with an opening for embedding the infusion bag, and the other end is provided with a through hole for the infusion port of the infusion bag to pass through; a pressurizing member connected with the bag-shaped body, used for adjusting the pressure of the infusion bag embedded in the bag-shaped body, and the pressurizing power is w1; a pressure sensor arranged in the bag-shaped body, used for measuring the pressure of the infusion bag in real time and outputting the corresponding pressure signal P 输液袋 ; a heating member connected with the bag-shaped body, used for adjusting the heating power of the infusion bag embedded in the bag-shaped body, and the heating power is w2; a first temperature sensor arranged in the bag-shaped body, used for measuring the temperature of the infusion bag in real time and outputting the corresponding first temperature signal T2; a second temperature sensor, used for measuring the room temperature of the environment where the bag-shaped body is arranged and outputting the corresponding second temperature signal T3; a temperature and pressure preset assembly, comprising a temperature preset member and a pressure adjusting member, used for adjusting the preset temperature T1 of the liquid medicine in the infusion bag when entering the vein of the patient and the preset infusion rate v 预设 of the infusion bag respectively; a control part connected with the pressurizing member, the pressure sensor, the heating member, the first temperature sensor, the second temperature sensor and the temperature and pressure preset assembly, and the temperature and pressure control model is stored in the control part in advance, wherein the temperature and pressure control model controls the size of w1 according to v 预设 and P 输液袋 , so that the actual infusion rate of the infusion bag reaches v 预设 , and the temperature and pressure control model controls w2 according to T1, T2, T3 and P​输液袋 Control the size of w2 so that the actual temperature of the liquid in the infusion bag reaches T1 when it is delivered to the patient's vein; the display screen is connected to the control unit and is used to display v in real time 预设 , T1, T2, and T3; and a power supply unit connected to and supplying power to each power-consuming unit of the infusion auxiliary device for the infusion bag. Furthermore, the method for constructing a temperature and pressure control model of the present invention constructs a temperature and pressure control model by actually measuring the relationship between temperature, pressure, and infusion rate and fitting the relationship between the three variables to obtain an empirical model.

[0026] Therefore, the infusion auxiliary device for an infusion bag and the method for constructing a temperature and pressure control model of the present invention have the following beneficial effects:

[0027] (1) The infusion bag embedded therein can be automatically pressurized, thereby increasing the infusion rate of the infusion bag until the rate reaches a value preset by the user. The degree of automation is high and no manual pressurization is required. It is suitable for different infusion scenarios, thereby changing the pressurization amplitude of the infusion bag according to the patient's actual physical condition and urgency, and then quickly adjusting the infusion rate of the infusion bag.

[0028] (2) It can automatically heat the infusion bag embedded therein, thereby increasing the infusion temperature of the infusion bag until the temperature reaches the value preset by the user, with a high degree of automation. It is also suitable for different infusion scenarios (different ambient temperatures and patient physical needs), thereby adjusting different heating temperatures and effectively preventing patients from experiencing hypothermia symptoms.

[0029] (4) The display screen allows the user to observe the infusion bag's infusion speed, infusion temperature, ambient temperature and other values ​​in real time.

[0030] (5) The pressure P actually applied to the infusion bag by the infusion auxiliary device's pressurizing power w1 and heating power w2 输液袋 Combined, real-time feedback is provided between the heating and pressurizing processes and corresponding power changes are made, making the heating and pressurizing (accelerating the infusion rate of the infusion bag) process of the infusion auxiliary device for the infusion bag more precise and with smaller errors.

[0031] (6) The method of constructing a temperature and pressure control model by actually measuring the relationship between temperature, pressure, and infusion rate and fitting the three variables to obtain an actual empirical model has high practical application significance. Compared with the theoretical model calculated by physical methods, the model obtained by fitting after actual measurement has higher accuracy, and its reliability can be further improved as the amount of test data increases. At the same time, the construction method of the temperature and pressure control model is simple and easy to implement, without relying on complex theoretical calculations.

[0032] (7) The construction method of the temperature and pressure control model will add heating power and pressure power through the actual pressure P received by the infusion bag 输液袋 In combination, the heating and pressurizing processes of the infusion bag auxiliary device are real-time feedback to each other and the corresponding power changes are made, so that the heating and pressurizing (accelerate the infusion rate of the infusion bag) process of the infusion bag auxiliary device is more accurate and has smaller error. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a structure assembly perspective view of the infusion bag auxiliary device of embodiment 1 of the present application;

[0034] Figure 2 is an exploded view of the infusion bag auxiliary device of embodiment 1 of the present application;

[0035] Figure 3 is a connection relationship schematic diagram of the control part of embodiment 1 of the present application;

[0036] Figure 4 is Figure 1 is a corresponding perspective view from another angle;

[0037] Figure 5 is a radial cross-sectional schematic diagram of the infusion bag auxiliary device of embodiment 1 of the present application at a certain depth in the axial direction;

[0038] Figure 6 is Figure 5 is an enlarged view of A in

[0039] Figure 7 is a radial cross-sectional schematic diagram of the infusion bag auxiliary device of embodiment 1 of the present application at another depth in the axial direction;

[0040] Figure 8 is Figure 7 is an enlarged view of B in

[0041] Figure 9 is a cross-sectional view along the axial direction of the infusion bag auxiliary device of embodiment 1 of the present application;

[0042] Figure 10 is Figure 9 is an enlarged view of C in

[0043] Figure 11 is Figure 1 is an enlarged view of D in

[0044] Figure 12 is Figure 1 is an enlarged view of E in

[0045] Figure 13This is a perspective view of the structure and assembly of an infusion assisting device for an infusion bag according to a second embodiment of the present invention. DETAILED DESCRIPTION

[0046] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the following embodiments, in conjunction with the accompanying drawings, specifically illustrate the method for constructing an infusion auxiliary device for an infusion bag and a temperature and pressure control model of the present invention.

[0047] <Example 1>

[0048] Figure 1 is a perspective view of the structure and assembly of an infusion auxiliary device for an infusion bag according to Example 1 of the present invention; Figure 2 1 is an exploded view of the structure of the infusion auxiliary device for an infusion bag according to Example 1 of the present invention; Figure 3 It is a schematic diagram of the connection relationship of the control unit of Example 1 of the present invention.

[0049] like Figures 1 to 3 As shown, this embodiment provides an infusion auxiliary device 100 for an infusion bag, including a bag-shaped body 10, a pressure regulating part 20, a temperature regulating part 30, a detection part 40, a control part 50, a display screen 60 and a power supply part (not shown in the figure).

[0050] Figure 4 yes Figure 1 a corresponding stereogram from another angle; Figure 5 1 is a schematic diagram of a radial cross-section of the infusion auxiliary device for an infusion bag according to Example 1 of the present invention at a certain axial depth; Figure 6 yes Figure 5 Enlarged view of point A in the middle.

[0051] like Figures 1 to 6 As shown, the bag-like body 10 is a hollow transparent bag-like structure having an opening 10a, a through hole 10b, a hanging ring 10c, a first airbag 10d and a second airbag 10e.

[0052] The opening 10a is located at one end of the bag-shaped body 10 along the axial direction, and is used for the infusion bag to be embedded therein.

[0053] The through hole 10b is located at the other end of the bag-shaped body 10 along the axial direction, and is used for the infusion port of the infusion bag to pass through.

[0054] The hanging ring 10 c is located at one end of the bag-like body 10 having the opening 10 a and is used for hanging the entire bag-like body 10 at a desired location.

[0055] Each of the two axial side surfaces of the bag-shaped body 10 has a hollow interlayer, and the two hollow interlayers form a first airbag 10d and a second airbag 10e respectively.

[0056] Figure 7is a schematic radial cross-sectional view of the infusion auxiliary device for an infusion bag according to Example 1 of the present invention at another axial depth; Figure 8 yes Figure 7 Enlarged view of point B in the middle; Figure 9 1 is a cross-sectional view of the infusion assisting device for an infusion bag according to embodiment 1 of the present invention taken along the axial direction; Figure 10 yes Figure 9 Enlarged view of point C in the middle.

[0057] like Figures 1 to 10 As shown, the first airbag 10d and the second airbag 10e are connected through two passages 10f penetrating between the layers of the bag-shaped body 10, so that the pressures in the first airbag 10d and the second airbag 10e are balanced with each other.

[0058] Figure 11 yes Figure 1 Enlarged view of point D in the middle.

[0059] like Figures 1 to 11 As shown, the pressure regulating part 20 includes a pressurizing member 21 , a pipeline 22 and a pressure regulating member 23 .

[0060] The pressurizing member 21 is an electric air pump, which is connected to the first airbag 10d through a pipe 22 passing through the bottom of the bag-shaped body 10, thereby pressurizing the first airbag 10d. The pressurizing power of the pressurizing member 21 is w1.

[0061] The pressure regulating member 23 is integrated on the operating unit 70. The pressure regulating member 23 has an infusion rate increase button 23a and an infusion rate decrease button 23b, which are respectively used to increase or decrease the preset infusion rate v of the infusion bag. 预设 .

[0062] Figure 12 yes Figure 1 Enlarged view of point E in the middle.

[0063] like Figures 1 to 12 As shown, the temperature adjustment unit 30 includes a heating element 31 and a temperature preset element 32 .

[0064] The heating element 31 includes a heating wire 311 and a heat-spreading film 312 .

[0065] The heating wires 311 are evenly distributed on both axial sides of the bag-shaped body 10 and are used to heat the infusion bag embedded in the bag-shaped body 10. The heating power of the heating wires 311 is w2.

[0066] The heat-dissipating films 312 are arranged on the two axial side surfaces inside the bag-shaped body 10 and cover the surface of the heating wire 311. When the infusion bag is embedded in the bag-shaped body 10, the two heat-dissipating films 312 are wrapped around the two axial side surfaces of the infusion bag. The heat-dissipating films 312 are used to evenly conduct the heat generated by the heating wire 311 to the liquid medicine in the infusion bag.

[0067] The temperature preset component 32 is integrated on the operating unit 70 and has a temperature increase button 23a and a temperature decrease button 23b, which are respectively used to increase or decrease the preset temperature T1 of the liquid in the infusion bag when it enters the patient's vein.

[0068] like Figure 1 、 Figure 2 、 Figure 9 、 Figure 11 as well as Figure 12 As shown, the detection unit 40 includes a pressure sensor 41 , a first temperature sensor 42 , and a second temperature sensor 43 .

[0069] like Figures 1 to 12 As shown:

[0070] The pressure sensor 41 and the first temperature sensor 42 are both arranged on the side of the heat-dissipating membrane 312 that contacts the infusion bag. The pressure sensor 41 and the first temperature sensor 42 are used to measure the pressure and the real-time temperature of the infusion bag embedded in the bag-shaped body 10, respectively, and output the corresponding pressure signal P 输液袋 and a first temperature signal T2.

[0071] The second temperature sensor 43 is disposed on the operating unit 70. The second temperature sensor 43 is used to measure the room temperature of the bag-shaped body in real time and output a corresponding second temperature signal T3.

[0072] The control unit 50 is connected to the pressurizing element 21 , the pressure sensor 41 , the heating wire 311 , the first temperature sensor 42 , the second temperature sensor 43 , the pressure regulating element 23 , and the temperature preset element 32 .

[0073] The control unit 50 in this embodiment is arranged on the operating unit 70 (not shown in the figure) to improve the portability of the entire infusion auxiliary device 100 for an infusion bag; the signal lines connecting the control unit 50 and the pressure regulating component 23 and the temperature preset component 32 in this embodiment are integrated into a circle around the periphery of the pipeline 22 (not shown in the figure), thereby improving the integration of the entire infusion auxiliary device 100 for an infusion bag.

[0074] The control unit 50 is a single chip microcomputer, which receives the pressure signal P transmitted by the pressure sensor 41. 输液袋 , a first temperature signal T2 transmitted by the first temperature sensor 42, a second temperature signal T3 transmitted by the second temperature sensor 43, a preset temperature T1 adjusted by the temperature preset component 32, and a preset infusion rate v adjusted by the pressure regulating component 23 预设 .

[0075] The control unit 50 stores a temperature and pressure control model in advance.

[0076] Temperature and pressure control model for v预设 and P 输液袋 The analysis and processing are performed to control the size of the pressurizing power w1 of the pressurizing member 21, thereby causing the first airbag 10d and the second airbag 10e to be pressurized and expanded to squeeze the infusion bag, thereby increasing the infusion rate until the preset infusion rate v is reached. 预设 .

[0077] Effect of temperature and pressure control model on P 输液袋 , T1, T2 and T3 are analyzed and processed to control the heating power w2 of the heating wire 311, so that the temperature of the liquid medicine delivered to the patient's vein after the infusion bag is heated reaches T1.

[0078] The display screen 60 is connected to the control unit 50 and displays v in real time 预设 Specifically, the display screen 60 in this embodiment is integrated on the operating unit 70 .

[0079] The power supply unit (not shown) is connected to and supplies power to each power-consuming unit of the infusion bag infusion assisting device 100. Specifically, the power supply unit in this embodiment is a removable battery, thereby enhancing the portability of the entire infusion bag infusion assisting device 100.

[0080] This embodiment further provides a method for constructing a temperature and pressure control model, which is used to construct the temperature and pressure control model pre-stored in the control unit 50 mentioned in this embodiment.

[0081] The method for constructing the temperature and pressure control model in this embodiment includes the following steps:

[0082] S10, selecting an infusion bag of fixed volume and a corresponding infusion tube of fixed length and diameter.

[0083] S20, through actual measurement, the actual infusion rate v of the infusion bag is obtained 实际 The pressure P 输液袋 Multiple sets of corresponding values ​​of v 实际 and P 输液袋 The multiple corresponding values ​​of the MATLAB software were fitted to obtain a smooth curve relationship P 输液袋 =f1(v 实际 ).

[0084] In this step, the temperature and pressure control model controls the pressure amplitude of the pressurizing member 21 so that the actual infusion rate v 实际 With the preset infusion rate v 预设 Same, so when the actual pressure value P 输液袋 Less than v 预设 When the preset pressure value of the corresponding infusion bag is reached, the pressurizing member 21 needs to be continuously pressurized, so the pressure control method of the temperature and pressure control model can be obtained, that is: when P 输液袋f1(v 预设 ) when v

[0085] S30, the temperature loss of the medicine in the infusion bag during the process of being delivered to the patient's vein through the infusion tube is recorded as ΔT, and ΔT is regarded as only related to v 实际 , T2 and T3, and a single-factor variable control is performed for multiple groups of actual tests to obtain multiple corresponding values of ΔT and v 实际 , T2 and T3, and a smooth four-dimensional surface relationship ΔT = f2(v 实际 , T2, T3) is obtained by fitting the values through MATLAB software.

[0086] S40, w2 is regarded as only determined by the preset temperature T4 = T1 + ΔT and T2 of the infusion bag, a single-factor variable control is performed for multiple groups of actual tests to obtain multiple corresponding values of w2 and ΔT, T1 and T2, and a smooth four-dimensional surface relationship w2 = f3(ΔT, T1, T2) is obtained by fitting the values through MATLAB software, that is, w2 = f3(ΔT, T1, T2) = f3[f2(v 实际 , T2, T3), T1, T2], T4 > T2.

[0087] S50, a temperature and pressure control model is constructed:

[0088] In the above formula, v 实际 is obtained by reverse calculation through P 输液袋 = f1(v 实际 ).

[0089] The use and operation process of the infusion bag auxiliary device 100:

[0090] S01, the infusion bag is embedded in the bag-shaped body 10 through the opening 10a, and the infusion port of the infusion bag is arranged to pass through the through hole 10b, and then the bag-shaped body 10 is hung at the required position through the hanging ring 10c.

[0091] S02, by adjusting the pressure adjusting part 23, the display screen 60 displays the corresponding required preset infusion rate v 预设 of the infusion bag; by adjusting the temperature preset part 32, the display screen 60 displays the corresponding required preset temperature T1 of the infusion bag medicine delivered to the patient's vein end.

[0092] S03, the pressure sensor 41 measures the real-time pressure received by the infusion bag and outputs the pressure signal P 输液袋 ; the first temperature sensor 42 measures the real-time temperature of the infusion bag and outputs the first temperature signal T2; the second temperature sensor 43 measures the real-time room temperature and outputs the second temperature signal T3.

[0093] S04, the control unit 50 receives the pressure signal P 输液袋 , the first temperature signal T2, the second temperature signal T3, the preset temperature T1 and the preset infusion rate v 预设 .

[0094] The temperature and pressure control model preloaded in the control unit 50 is 预设 and P 输液袋 The analysis and processing are performed to control the size of the pressurizing power w1 of the pressurizing member 21, thereby causing the first airbag 10d and the second airbag 10e to be pressurized and expanded to squeeze the infusion bag, thereby increasing the infusion rate until the preset infusion rate v is reached. 预设 .

[0095] Effect of temperature and pressure control model on P 输液袋 , T1, T2 and T3 are analyzed and processed to control the heating power w2 of the heating wire 311, so that the temperature of the liquid medicine delivered to the patient's vein after the infusion bag is heated reaches T1.

[0096] S05. When it is necessary to adjust the infusion rate and the infusion temperature of the infusion bag, the control unit 50 can automatically control the pressure intensity and heating power of the infusion auxiliary device 100 for the infusion bag by controlling the pressure regulating component 23 and the temperature preset component 32, thereby automatically adjusting the infusion rate and the infusion temperature of the infusion bag.

[0097] <Example 2>

[0098] For the sake of convenience, in this embodiment, the same symbols are given to the same structures as in Example 1, and the same descriptions are omitted.

[0099] Figure 13 This is a perspective view of the structure and assembly of an infusion assisting device for an infusion bag according to a second embodiment of the present invention.

[0100] like Figure 13 As shown, this embodiment provides an infusion auxiliary device 101 for an infusion bag, including a bag-shaped body 10', a pressure regulating unit 20', a temperature regulating unit 30, a detection unit 40, a control unit 50, a display screen 60 and a power supply unit (not shown in the figure).

[0101] The bag-shaped body 10 ′ has an opening 10 a , a through hole 10 b , a hanging loop 10 c , a first air bag 10 d , and a second air bag 10 e .

[0102] The pressure regulating unit 20 ′ includes a pressurizing member 21 , a pipeline 22 ′ and a pressure regulating member 23 .

[0103] The bag-shaped body 10' and pressure-regulating portion 20' of this embodiment are generally similar in structure to those of the bag-shaped body 10 and pressure-regulating portion 20 of Example 1 and will not be reiterated. The only difference is that the first airbag 10d and the second airbag 10e are not interconnected (the bag-shaped body 10' of this embodiment does not have the passage 10f of Example 1). Instead, the first and second airbags 10d, 10e are each connected to the pressurizing element 21 via two pipes 22', and are independently pressurized by the pressurizing element 21.

[0104] The temperature adjustment unit 30, the detection unit 40, the control unit 50, the display screen 60 and the power supply unit (not shown) in this embodiment are generally similar to those in the embodiment 1 and will not be repeated.

[0105] Functions and Effects of the Embodiments

[0106] According to the embodiment, an infusion auxiliary device for an infusion bag is provided, which comprises: a bag-shaped body having an opening at one axial end for the infusion bag to be embedded therein, and a through hole at the other end for the infusion port of the infusion bag to pass through; a pressurizing member connected to the bag-shaped body, for adjustable pressurization of the infusion bag embedded in the bag-shaped body, with a pressurizing power of w1; a pressure sensor disposed inside the bag-shaped body, for measuring the pressure on the infusion bag in real time and outputting a corresponding pressure signal P 输液袋 A heating element is connected to the bag-like body and is used to heat the infusion bag embedded in the bag-like body with adjustable power, and its heating power is w2; a first temperature sensor is arranged inside the bag-like body and is used to measure the temperature of the infusion bag in real time and output a corresponding first temperature signal T2; a second temperature sensor is used to measure the room temperature of the environment in which the bag-like body is located in real time and output a corresponding second temperature signal T3; a temperature and pressure preset component includes a temperature preset component and a pressure regulating component, which are respectively used for the user to adjust the preset temperature T1 of the liquid in the infusion bag when it enters the patient's vein and the preset infusion rate v of the infusion bag 预设 The control unit is connected to the pressurizing member, the pressure sensor, the heating member, the first temperature sensor, the second temperature sensor and the temperature and pressure preset component. The control unit pre-stores a temperature and pressure control model, and the temperature and pressure control model is based on v 预设 and P 输液袋 Control the size of w1 so that the actual infusion rate of the infusion bag reaches v 预设 The temperature and pressure control model is based on T1, T2, T3 and P 输液袋 Control the size of w2 so that the actual temperature of the liquid in the infusion bag reaches T1 when it is delivered to the patient's vein; the display screen is connected to the control unit and is used to display v in real time 预设 , specific values ​​of T1, T2 and T3; and a power supply unit, which is connected to each power consumption unit of the infusion auxiliary device for the infusion bag and supplies power to it.

[0107] Therefore, the infusion auxiliary device for an infusion bag of this embodiment has the following beneficial effects:

[0108] (1) The infusion bag embedded therein can be automatically pressurized, thereby increasing the infusion rate of the infusion bag until the rate reaches a value preset by the user. The degree of automation is high and no manual pressurization is required. It is suitable for different infusion scenarios, thereby changing the pressurization amplitude of the infusion bag according to the patient's actual physical condition and urgency, and then quickly adjusting the infusion rate of the infusion bag.

[0109] (2) It can automatically heat the infusion bag embedded therein, thereby increasing the infusion temperature of the infusion bag until the temperature reaches the value preset by the user, with a high degree of automation. It is also suitable for different infusion scenarios (different ambient temperatures and patient physical needs), thereby adjusting different heating temperatures and effectively preventing patients from experiencing hypothermia symptoms.

[0110] (3) The display screen allows the user to observe the infusion bag's infusion speed, infusion temperature, ambient temperature and other values ​​in real time.

[0111] (4) The pressure P actually applied to the infusion bag by the infusion auxiliary device's pressurizing power w1 and heating power w2 输液袋 Combined, real-time feedback is provided between the heating and pressurizing processes and corresponding power changes are made, making the heating and pressurizing (accelerating the infusion rate of the infusion bag) process of the infusion auxiliary device for the infusion bag more precise and with smaller errors.

[0112] Furthermore, each of the two axial side surfaces of the bag-like body has a hollow interlayer, and the two hollow interlayers form a first airbag and a second airbag respectively. The pressurizing member is an air pump, which is connected to the first airbag and / or the second airbag and is used to inflate air into them so that the two axial side surfaces of the bag-like body expand and thus squeeze the infusion bag.

[0113] Furthermore, the first and second airbags are connected via at least one passageway extending between the layers of the bag-shaped body, and at least one of the first and second airbags is connected to the air pump via a pipeline. This arrangement in Example 1 balances the air pressure between the first and second airbags, allowing for more uniform compression and pressurization of the infusion bag, thereby accelerating its infusion rate.

[0114] Furthermore, the first and second airbags are not interconnected. Instead, they are each connected to an air pump via a pipeline and pressurized by the air pump. This arrangement in Example 2 allows the first and second airbags to inflate independently to squeeze and pressurize the infusion bag, preventing the entire infusion bag-use assist device from failing to pressurize if one of the airbags is damaged.

[0115] Furthermore, the heating element includes heating wires that are evenly distributed on both axial sides of the bag-shaped body to heat the infusion bag embedded in the bag-shaped body. This arrangement has the following beneficial effects:

[0116] (1) The uniformly distributed heating wires can uniformly pressurize the infusion bag; (2) When the infusion bag is pressurized by the infusion auxiliary device through expansion to increase the infusion rate, the bag body will undergo a certain amount of expansion and deformation. Because the heating wires used in this embodiment have good flexibility and deformation capabilities, they can better match the expansion and deformation process of the bag body, thereby more efficiently and evenly heating the liquid in the infusion bag.

[0117] Furthermore, the heating element also includes a heat-distributing film, which is arranged on the two axial side surfaces inside the bag-shaped body and covers the surface of the heating wire. When the infusion bag is embedded in the bag-shaped body, the two heat-distributing films are covered on the two axial side surfaces of the infusion bag. The heat-distributing film is used to evenly conduct the heat generated by the heating wire to the medicine in the infusion bag. The first temperature sensor is arranged on the side of the heat-distributing film that contacts the infusion bag, and the second temperature sensor is not in direct contact with the bag-shaped body. Such a setting has the following beneficial effects: (1) the heat-dissipating membrane enables the heat generated by the heating wire in the infusion bag to be more evenly transferred to the liquid medicine in the infusion bag during the heating process; (2) the infusion bag in this embodiment has the functions of pressurizing and heating the infusion bag at the same time, and when the infusion bag pressurizes the infusion bag by expanding to increase the infusion rate, the bag-shaped body will produce a certain expansion deformation. At this time, since the heat-dissipating membrane itself has a certain flexibility, it can better match the expansion and deformation process of the bag-shaped body, thereby heating the liquid medicine in the infusion bag more efficiently and evenly.

[0118] Furthermore, the display screen, temperature preset component, pressure regulating component, second temperature sensor, and control unit are integrated into the same operating unit. This arrangement has the following beneficial effects: (1) integration into the same operating unit improves the integration and portability of the entire infusion auxiliary device for an infusion bag; and (2) allows the user to conveniently observe the temperature and pressure values ​​measured by the corresponding temperature sensor and pressure sensor, as well as the user-preset infusion rate and infusion temperature values.

[0119] Furthermore, the bag-shaped body is made of a transparent material. This arrangement allows medical staff to observe the delivery of the liquid medicine in the infusion bag in real time, so as to understand the remaining amount of the liquid medicine.

[0120] Furthermore, one end of the bag-shaped body having an opening is provided with a hanging ring. Such arrangement can facilitate medical personnel to hang the infusion bag in a desired position with the infusion auxiliary device.

[0121] According to the method for constructing a temperature and pressure control model provided in this embodiment, it is used to construct any of the temperature and pressure control models mentioned above, and comprises the following steps: S10, selecting an infusion bag of fixed volume and its corresponding infusion tube of fixed length and diameter; S20, obtaining the actual infusion rate v of the infusion bag through actual measurement. 实际 The pressure P 输液袋 Multiple sets of corresponding values ​​of v 实际 and P 输液袋 The smooth curve relationship P is obtained by fitting multiple groups of corresponding numerical values 输液袋 =f1(v 实际 ), since the temperature and pressure control model controls the pressure amplitude of the pressurizing part, the actual infusion rate v 实际 With the preset infusion rate v 预设 Same, so when P 输液袋 Less than v 预设 When the preset pressure value of the corresponding infusion bag is reached, the pressure piece needs to be continuously pressurized, so the pressure control method of the temperature and pressure control model can be obtained, that is: when P 输液袋 <f1(v 预设 ), w1>0; S30, the temperature loss during the process of delivering the liquid in the infusion bag to the patient's vein through the infusion tube is recorded as ΔT, and ΔT is regarded as only related to v 实际 , T2 and T3, and multiple groups of actual tests were conducted by controlling single factor variables, and it was found that ΔT and v 实际 , T2 and T3 and fit them to obtain a smooth four-dimensional surface relationship ΔT=f2(v 实际 , T2, T3); S40, w2 is determined by the preset temperature T4 = T1 + ΔT and T2 of the infusion bag, and multiple groups of actual tests are performed by controlling the single factor variable to obtain multiple groups of corresponding values ​​of w2 and ΔT, T1 and T2 and fit them to obtain a smooth four-dimensional surface relationship w2 = f3 (ΔT, T1, T2), then w2 = f3 (ΔT, T1, T2) = f3 [f2 (v 实际 ,T2,T3),T1,T2], T4>T2; S50, the temperature and pressure control model is constructed: In the above formula, v 实际 By P 输液袋 =f1(v 实际 ) is calculated in reverse order.

[0122] Therefore, the method for constructing the temperature and pressure control model in this embodiment has the following beneficial effects:

[0123] (1) The method of constructing a temperature and pressure control model by actually measuring the relationship between temperature, pressure and infusion rate and fitting the actual empirical model between the three variables has high practical application significance.

[0124] (2) Compared with the theoretical model calculated by physical methods, the model obtained by fitting after actual measurement is more accurate, and its reliability can be further improved as the amount of test data increases.

[0125] (3) The construction method of the temperature and pressure control model is simple and easy to implement, and does not need to rely on complex theoretical calculations.

[0126] (4) The construction method of the temperature and pressure control model is to convert the heating power and the pressurizing power into the actual pressure P of the infusion bag. 输液袋 Combined, the heating and pressurizing processes of the infusion auxiliary device for the infusion bag can provide real-time feedback to each other and make corresponding power changes, making the heating and pressurizing (accelerating the infusion rate of the infusion bag) process of the infusion auxiliary device for the infusion bag more precise and with smaller errors.

[0127] Those skilled in the art will appreciate that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An infusion auxiliary device for an infusion bag, characterized in that: include: The bag-shaped body has an opening at one axial end for the infusion bag to be embedded therein, and a through hole at the other end for the infusion port of the infusion bag to pass through; a pressurizing member connected to the bag-shaped body and used for adjustable pressurization of the infusion bag embedded in the bag-shaped body, with a pressurizing power of w1; The pressure sensor is arranged inside the bag-shaped body and is used to measure the pressure of the infusion bag in real time and output the corresponding pressure signal P 输液袋 ; a heating element connected to the bag-shaped body and used to heat the infusion bag embedded in the bag-shaped body with adjustable power, wherein the heating power is w2; a first temperature sensor, disposed inside the bag-shaped body, for measuring the temperature of the infusion bag in real time and outputting a corresponding first temperature signal T2; A second temperature sensor is used to measure the room temperature of the environment in which the bag-shaped body is located in real time and output a corresponding second temperature signal T3; The temperature and pressure preset component includes a temperature preset component and a pressure regulating component, which are used for the user to adjust the preset temperature T1 of the liquid in the infusion bag when it enters the patient's vein and the infusion rate v of the infusion bag. 预设 ; The control unit is connected to the pressurizing element, the pressure sensor, the heating element, the first temperature sensor, the second temperature sensor and the temperature and pressure preset component. The control unit pre-stores a temperature and pressure control model. The temperature and pressure control model is based on the v 预设 and P 输液袋 Control the size of w1 so that the actual infusion rate of the infusion bag reaches v 预设 The temperature and pressure control model is based on T1, T2, T3 and P 输液袋 Controlling the value of w2 so that the actual temperature of the liquid in the infusion bag reaches T1 when it is delivered to the patient's vein; Display screen, connected to the control unit, for real-time display of v 预设 , specific values ​​of T1, T2 and T3; and The power supply unit is connected to each power consumption unit of the infusion auxiliary device for the infusion bag and supplies power to the power consumption units. The method for constructing the temperature and pressure control model includes the following steps: S10, selecting the infusion bag of fixed volume and the corresponding infusion tube of fixed length and diameter; S20, through actual measurement, obtain the actual infusion rate v of the infusion bag 实际 The pressure P 输液袋 Multiple sets of corresponding values ​​​​of v 实际 and P 输液袋 The smooth curve relationship P is obtained by fitting multiple groups of corresponding numerical values 输液袋 =f1(v 实际 ), Since the temperature and pressure control model controls the pressurization amplitude of the pressurizing member, the actual infusion rate v 实际 With the preset infusion rate v 预设 Same, so when P 输液袋 Less than v 预设 When the preset pressure value of the infusion bag corresponds to the pressure of the infusion bag, the pressure member needs to continue to pressurize, so the pressure control method of the temperature and pressure control model can be obtained, that is: when P 输液袋 <f1(v 预设 ), w1>0; S30, the temperature loss during the process of delivering the liquid medicine in the infusion bag to the patient's vein via the infusion tube is recorded as ΔT, and ΔT is regarded as only related to v 实际 , T2 and T3, and multiple groups of actual tests were conducted by controlling single factor variables, and it was found that ΔT and v 实际 , T2 and T3 and fit them to obtain a smooth four-dimensional surface relationship ΔT=f2(v 实际 ,T2,T3); S40, w2 is determined by the preset temperature T4=T1+ΔT and T2 of the infusion bag, and multiple groups of actual tests are performed by controlling the single factor variable to obtain multiple groups of corresponding values ​​of w2 and ΔT, T1 and T2 and fit them to obtain a smooth four-dimensional surface relationship w2=f3(ΔT,T1,T2), then w2=f3(ΔT,T1,T2)=f3[f2(v 实际 ,T2,T3),T1,T2],T4>T2; S50, constructing the temperature and pressure control model: In the above formula, v 实际 By P 输液袋 =f1(v 实际 ) is calculated in reverse order.

2. The infusion auxiliary device for an infusion bag according to claim 1, characterized in that: in, The two axial sides of the bag-shaped body each have a hollow interlayer, and the two hollow interlayers form a first airbag and a second airbag respectively. The pressurizing member is an air pump, which is connected to the first airbag and / or the second airbag and is used to inflate air therein so that the axial sides of the bag-shaped body expand and thus squeeze the infusion bag.

3. The infusion auxiliary device for an infusion bag according to claim 2, characterized in that: in, The first airbag and the second airbag are not connected to each other, The first airbag and the second airbag are respectively connected to the air pump through pipelines, and are pressurized by air supplied by the air pump.

4. The infusion auxiliary device for an infusion bag according to claim 2, characterized in that: in, The first airbag and the second airbag are connected through at least one passage penetrating between the layers of the bag-shaped body. At least one of the first airbag or the second airbag is connected to the air pump through a pipeline.

5. The infusion auxiliary device for an infusion bag according to claim 1, characterized in that: in, The heating element includes a heating wire, The heating wires are evenly and densely distributed on the two axial side surfaces inside the bag-shaped body, and are used to heat the infusion bag embedded in the bag-shaped body.

6. The infusion auxiliary device for an infusion bag according to claim 5, characterized in that: in, The heating element further includes a heat-spreading film. The heat-dissipating film is arranged on the two axial sides of the bag-shaped body and covers the surface of the heating wire. When the infusion bag is embedded in the bag-shaped body, the two heat-dissipating films are coated on the two axial sides of the infusion bag. The heat-dissipating films are used to evenly conduct the heat generated by the heating wire to the liquid medicine in the infusion bag. The first temperature sensor is arranged on the side of the heat-dissipating film that contacts the infusion bag. The second temperature sensor is not in direct contact with the bag-shaped body.

7. The infusion auxiliary device for an infusion bag according to claim 1, characterized in that: in, The display screen, the temperature preset component, the voltage regulating component, the second temperature sensor and the control part are integrated on the same operating unit.

8. The infusion auxiliary device for an infusion bag according to claim 1, characterized in that: in, At least part of the bag-shaped body is a transparent area, which is used for medical staff to observe the delivery status of the liquid medicine in the infusion bag in real time. One end of the bag-shaped body having the opening is provided with a hanging ring for hanging at a desired position.

9. The infusion auxiliary device for an infusion bag according to claim 1, characterized in that: in, In steps S10 to S40 , multiple groups of corresponding values ​​are fitted using MATLAB software.

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