A multifunctional safety component for non-gravity infusion sets

Abstract

The present invention relates to a multifunctional safety component for a non-gravity infusion device, comprising a shell, with a liquid inlet and a liquid outlet on both sides of the shell, a precision filter membrane is arranged inside the shell, the precision filter membrane separates the inner cavity of the shell into a liquid inlet cavity and a liquid outlet cavity, the liquid inlet cavity is connected to the liquid inlet, the liquid outlet cavity is connected to the liquid outlet, the precision filter membrane can filter out the liquid medicine and particles above 0.5um-5um in the pipeline, a one-way pressure opening mechanism installation cavity is arranged between the liquid outlet cavity and the liquid outlet, and a one-way pressure opening mechanism is installed in the one-way pressure opening mechanism installation cavity. The opening pressure of the mechanism can prevent the liquid in the soft bag from unexpectedly flowing to the patient under the action of gravity when the pump does not start working or the infusion device is taken out of the pump.

Description

Technical Field

[0001] The invention relates to the technical field of infusion, in particular to a multifunctional safety component for a non-gravity infusion device. Background Art

[0002] Infusion is an important clinical medication method. It has been more than 100 years since the birth of the infusion method. During this period, the drug container, medication pathway (infusion set) and puncture components have been improved several times, and power infusion equipment (such as infusion pumps) have also been born. Infusion has become safer and safer. However, the infusion set itself has always remained in the gravity infusion stage. Its main feature is that the infusion pipeline must be equipped with a component such as a drip pot. Its function is to provide medical staff with rough measurement and visual feedback to check whether the infusion is normal. Even when using an infusion pump, the drip pot also plays a safety role in monitoring whether self-flow occurs. It is precisely because of the existence of the drip pot that it brings many shortcomings while bringing intuitive monitoring:

[0003] 1. Due to the existence of the drip pot, the infusion container (hanging bottle, hanging bag) must be hung up, which takes up a lot of space and is not easy to move. When using an infusion pump for infusion, due to the continuation of the existing infusion system, the infusion bag or bottle still needs to be hung up, which limits the mobility;

[0004] 2. Due to the need to be hoisted and gravity-based infusion, the infusion line is relatively long and thick, generating more disposable waste, which brings greater environmental pressure to society;

[0005] 3. When using an infusion pump for infusion, no one actually monitors the drip pot to determine whether the infusion is normal. At this time, unexpected leakage of the pipeline, mechanical fatigue pump pressure drop, use of unapproved infusion sets, low ambient temperature causing the infusion set to be too hard, etc. may cause loss of infusion pressure, causing self-flow and harming the patient. To solve this problem, a drop count sensor may be an option, but its easy false alarm characteristics limit the application of this safety measure;

[0006] 4. When using an infusion pump for infusion, when removing the infusion set from the infusion pump, the flow regulator must be manually closed in advance. Human error may cause the infusion to flow out by itself. Summary of the invention

[0007] The purpose of the present invention is to solve the defects of the prior art and provide a multifunctional safety component for a non-gravity infusion set.

[0008] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0009] A multifunctional safety component for a non-gravity infusion device comprises a shell, with a liquid inlet and a liquid outlet on both sides respectively, a precision filter membrane is arranged in the shell, the precision filter membrane separates the inner cavity of the shell into a liquid inlet cavity and a liquid outlet cavity, the liquid inlet cavity is connected with the liquid inlet, the liquid outlet cavity is connected with the liquid outlet, the precision filter membrane can filter out the liquid medicine and particles larger than 0.5um-5um in the pipeline, a one-way pressure opening mechanism installation cavity is arranged between the liquid outlet cavity and the liquid outlet, and a one-way pressure opening mechanism is installed in the one-way pressure opening mechanism installation cavity.

[0010] Furthermore, the one-way pressure opening mechanism includes a mounting seat fixed in the one-way pressure opening mechanism installation cavity and an elastic pressure membrane arranged on the top of the mounting seat, the top of the one-way pressure opening mechanism installation cavity is provided with a transition port, the elastic pressure membrane corresponds to the transition port and contacts with the shoulder armors on both sides of the transition port, and the liquid outlet cavity is connected with the one-way pressure opening mechanism installation cavity through the transition port. The one-way pressure opening mechanism installation cavity is connected with the liquid outlet.

[0011] Furthermore, the one-way pressure opening mechanism includes a spring fixed in the one-way pressure opening mechanism installation cavity and a movable plunger arranged on the top of the spring, the top of the one-way pressure opening mechanism installation cavity is provided with a transition port, the movable plunger corresponds to the transition port and contacts with the shoulder armors on both sides of the transition port, and the liquid outlet cavity is connected with the one-way pressure opening mechanism installation cavity through the transition port. The one-way pressure opening mechanism installation cavity is connected with the liquid outlet.

[0012] Furthermore, a breathable filtering mechanism is provided on the shell.

[0013] Furthermore, the air-permeable filtering mechanism comprises an air-permeable hole connected to the liquid inlet cavity, and an air-permeable membrane is provided at the air-permeable hole.

[0014] Furthermore, a precision pressure transmission mechanism is provided on the shell.

[0015] Furthermore, the precision pressure transmission mechanism includes a pressure transmission port connected to the liquid inlet cavity or the liquid outlet cavity, and a precision pressure transmission membrane is provided at the pressure transmission port, and the precision pressure transmission membrane is in contact with the force sensor on the infusion pump.

[0016] Furthermore, the precision pressure transmission mechanism is a precision pressure sensor disposed on the inner wall of the liquid inlet cavity or the liquid outlet cavity, and the signal of the precision pressure sensor is connected to the circuit of the infusion pump through a cable or a conductive node placed on the surface of the multifunctional safety component to transmit the pressure signal to the infusion pump. The precision pressure sensor can be a 1630 disposable pressure sensor of MEAS.

[0017] Furthermore, the liquid inlet is connected to an infusion pump tube of an infusion pump, and the liquid outlet corresponds to the patient through an infusion pipeline.

[0018] Furthermore, the material of the precision filtration membrane is medical-grade microporous hydrophilic filter membrane materials such as nuclear pore membrane, polyethersulfone (PES) or nylon; the material of the elastic pressure membrane is 0.2-2mm medical silicone rubber or other medical-grade elastic materials; the material of the breathable membrane is polytetrafluoroethylene (PTFE), polypropylene (PP) and other hydrophobic filter membrane materials; the material of the precision pressure conduction membrane is 0.1-0.3mm thick PVC, PE, silicone and other medical-grade film materials.

[0019] The beneficial effects of the present invention are as follows: 1. Compared with the traditional gravity infusion device, the infusion device used in the present invention eliminates the drip pot and uses the infusion soft bag which is becoming a development trend as the liquid medicine container. The soft bag does not need to be hung up and can be placed near the pump, which is convenient for movement;

[0020] 2. The multifunctional safety component used in the present invention is provided with a one-way pressure opening mechanism, the opening pressure of which can prevent the liquid in the soft bag from unexpectedly flowing to the patient under the action of gravity when the pump has not started working or the infusion set has been taken out of the pump. At the same time, the opening pressure establishes a pressure threshold Pk (greater than the pressure provided by conventional gravity infusion, generally between 10Kpa-50Kpa). When the pump is working, the liquid medicine will flow to the patient through the one-way valve only when the pressure Pw generated in the pipeline after the pump is greater than the opening pressure threshold Pk, and this pressure threshold can be measured by a force (pressure) sensor arranged on the pump or built into the pipeline, which avoids the risk of infusion caused by uncontrolled pump pressure caused by factors such as improper coordination between the pump and the pipeline, wear of the pump itself, the influence of temperature factors on the hardness and elasticity of the pipeline, and unqualified mechanical dimensions of the pipeline;

[0021] 3. The multifunctional safety component is equipped with a precision pressure transmission mechanism or a built-in precision pressure sensor (such as: MEAS 1630 disposable pressure sensor). The precision pressure transmission mechanism can accurately transmit the pressure in the infusion tube after the pump to the force sensor on the infusion pump to obtain the pressure value in the tube, or directly transmit the signal to the infusion pump through the precision pressure sensor built into the pipeline. The infusion pump determines whether the pump pressure is out of control based on the actual measured pressure value in the pipeline during work.

[0022] 4. The infusion pump used in the present invention is provided with a force sensor (such as Honeywell's force sensor) that measures the pressure in the tube through the precision pressure transmission mechanism in the multifunctional safety component of the infusion set, or obtains the pressure value in the tube from the pressure sensor built into the infusion set, and is provided with analysis software to identify and determine whether there is a risk of pump pressure loss of control;

[0023] 5. The housing of the multifunctional safety component of the present invention is provided with a breathable filter mechanism, which includes a breathable hole connected to the liquid inlet cavity, and a breathable membrane is provided at the breathable hole. The breathable membrane can filter out the air in the pipeline during the infusion and discharge it to the outside of the infusion set, playing the role of filtering gas while quickly exhausting air;

[0024] 6. A precision filter membrane is provided in the shell, which divides the inner cavity of the shell into a liquid inlet cavity and a liquid outlet cavity. The liquid inlet cavity is connected to the liquid inlet, and the liquid outlet cavity is connected to the liquid outlet. The precision filter membrane can filter out the liquid medicine and particles larger than 0.5um-5um in the pipeline to ensure that the liquid medicine entering the liquid outlet cavity from the liquid inlet cavity is clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a front schematic diagram of the multifunctional safety component in Example 1 of the present invention;

[0026] Figure 2 This is a schematic diagram of the reverse side of the multifunctional safety component in Example 1 of the present invention;

[0027] Figure 3 is a cross-sectional schematic diagram of a multifunctional safety component in Example 1 of the present invention;

[0028] Figure 4 It is a cross-sectional schematic diagram of the working state of the multifunctional safety component in Example 1 of the present invention;

[0029] Figure 5 This is a schematic diagram of the coordination between the infusion set and the infusion pump composed of the multifunctional safety component in Example 1 of the present invention;

[0030] Figure 6 This is a front view of a multifunctional safety component in Example 2 of the present invention;

[0031] Figure 7 This is a schematic diagram of the reverse side of the multifunctional safety component in Example 2 of the present invention;

[0032] Figure 8 is a cross-sectional schematic diagram of a multifunctional safety component in Example 2 of the present invention;

[0033] Fig. 9 It is a cross-sectional schematic diagram of the working state of the multifunctional safety component in Example 2 of the present invention;

[0034] Fig.10 This is a schematic diagram of the coordination between the infusion set and the infusion pump composed of the multifunctional safety component in Example 2 of the present invention;

[0035] Fig.11 It is a schematic diagram of the working principle of the corresponding infusion system of the present invention. DETAILED DESCRIPTION

[0036] The following is a further description of this patent in conjunction with specific embodiments and drawings:

[0037] Example 1

[0038] like Figures 1 to 5 , Fig.11 As shown, a multifunctional safety component for a non-gravity infusion device, the multifunctional safety component 100 includes a shell 1, with a liquid inlet 2 and a liquid outlet 3 on both sides of the shell 1 respectively, a precision filter membrane 4 is arranged in the shell 1, the precision filter membrane 4 divides the inner cavity of the shell 1 into a liquid inlet cavity 5 and a liquid outlet cavity 6, the liquid inlet cavity 5 is connected with the liquid inlet 2, the liquid outlet cavity 6 is connected with the liquid outlet 3, the liquid inlet 2 is connected with the infusion pump tube of the infusion pump, the liquid outlet 3 corresponds to the patient through the infusion pipeline, the precision filter membrane 4 can filter out the particles larger than 0.5um-5um in the medicine solution and the pipeline, a one-way pressure opening mechanism installation cavity 7 is arranged between the liquid outlet cavity 6 and the liquid outlet 3, and a one-way pressure opening mechanism is installed in the one-way pressure opening mechanism installation cavity 7.

[0039] The one-way pressure opening mechanism comprises a mounting seat 8 fixed in the one-way pressure opening mechanism mounting cavity 7 and an elastic pressure membrane 9 arranged on the top of the mounting seat 8. The top of the one-way pressure opening mechanism mounting cavity is provided with a transition port 10. The elastic pressure membrane 9 corresponds to the transition port 10 and contacts with shoulder armors 11 on both sides of the transition port 10. The liquid outlet cavity 6 is connected with the one-way pressure opening mechanism mounting cavity 7 through the transition port 10. The one-way pressure opening mechanism mounting cavity 7 is connected with the liquid outlet 3.

[0040] Furthermore, a precision pressure transmission mechanism is provided on the housing 1, and the precision pressure transmission mechanism includes a pressure transmission port 12 connected to the liquid inlet cavity 5 or the liquid outlet cavity 6, and a precision pressure transmission membrane 13 is provided at the pressure transmission port 12, and the precision pressure transmission membrane 13 is in contact with the force sensor on the infusion pump. It should be noted that the drawings of the present application only list the case where the precision pressure transmission mechanism is arranged outside the liquid inlet cavity 5, but the technical solution of arranging the precision pressure transmission mechanism outside the liquid outlet cavity 6 also falls within the protection scope of the present application.

[0041] Furthermore, the housing 1 is provided with an air-permeable filter mechanism, which includes an air-permeable hole 14 communicating with the liquid inlet chamber 5 , and an air-permeable membrane 15 is provided at the air-permeable hole 14 .

[0042] Among them, the material of the precision filtration membrane 4 is medical-grade microporous hydrophilic filter membrane materials such as nuclear pore membrane, polyethersulfone (PES) or nylon; the material of the elastic pressure membrane 9 is 0.2-2mm medical silicone rubber or other medical-grade elastic materials; the material of the breathable membrane 15 is polytetrafluoroethylene (PTFE), polypropylene (PP) and other hydrophobic filter membrane materials; the material of the precision pressure conduction membrane 13 is 0.1-0.3mm thick PVC, PE, silicone and other medical-grade film materials.

[0043] The principles and steps of the system corresponding to this multifunctional safety component are as follows:

[0044] a. Place the prepared infusion soft bag 18 around the infusion pump 16 (e.g., in the bag on the side of the pump, in the storage box on the top or side of the pump, etc.);

[0045] b. Insert the needle of the infusion set 17 into the liquid outlet of the liquid medicine container. The liquid medicine flows from the liquid medicine container through the needle, the upper infusion pipeline, and the infusion pump tube to the multifunctional safety component 100 under the action of gravity. The air in the tube is discharged through the breathable membrane 15 and the breathable hole 14 of the multifunctional safety component 100 until the liquid medicine fills the chamber where the breathable membrane 15 and the breathable hole 14 are located.

[0046] c. Clamp the infusion set 17 onto the infusion pump 16, and also clamp the multifunctional safety component 100 onto the corresponding clamping position on the infusion pump 16, so that the precision pressure transmission mechanism of the multifunctional safety component 100 is in close contact with the force sensor on the pump (the pressure in the pipeline can be measured through the contact surface, P=F / S);

[0047] d. Use the fast forward function of the pump to fill the pipeline behind the multifunctional safety component 100 with liquid medicine. At the same time, it can be seen through the pump interface that the internal pressure of the pipeline behind the multifunctional safety component 100 should be greater than or equal to the opening pressure threshold Pk of the elastic pressure membrane 9 of the one-way pressure opening mechanism (greater than the pressure provided by conventional gravity infusion, generally between 10Kpa-50Kpa). At the same time, the pump software judges this pressure and discovers the risk of insufficient pump pressure in advance;

[0048] e. Press the start button to start the infusion. At the same time, the pump automatically monitors the pressure in the pipeline behind the multifunctional safety component 100, and promptly alarms when it finds a loss of pressure;

[0049] f. After the infusion is completed, the infusion set 17 is taken out from the pump, and the elastic pressure membrane 9 of the one-way pressure opening mechanism is reset to automatically close the transition port 10 to avoid self-flow.

[0050] Example 2

[0051] like Figures 6 to 10 As shown, the difference between this embodiment and embodiment 1 is that the one-way pressure opening mechanism can be preferably another structure, which includes a spring 19 fixed in the one-way pressure opening mechanism installation cavity 7 and a movable plunger 20 arranged on the top of the spring 19, the top of the one-way pressure opening mechanism installation cavity is provided with a transition port 10, the movable plunger 20 corresponds to the transition port 10 and contacts with the shoulder armor 11 on both sides of the transition port 10, and the liquid outlet cavity 6 is connected with the one-way pressure opening mechanism installation cavity 7 through the transition port 10. The one-way pressure opening mechanism installation cavity 7 is connected with the liquid outlet 3.

[0052] This embodiment mainly controls the contact and separation of the movable plunger 20 and the transition port 10 by the expansion and contraction of the spring 19, thereby achieving the effect of automatic closure of the pipeline and avoiding self-flow.

[0053] Example 3

[0054] like Figure 8 , Fig. 9 , Fig.10 As shown, the difference between this embodiment and embodiment 1 is that the precision pressure transmission mechanism is a precision pressure sensor 21 arranged on the inner wall of the liquid inlet cavity 5 or the liquid outlet cavity 6. The precision pressure sensor 21 can be a 1630 disposable pressure sensor of MEAS. The signal of the precision pressure sensor 21 is connected to the circuit of the infusion pump 16 through a cable 22 or a conductive node placed on the surface of the multifunctional safety component, and the pressure signal is transmitted to the infusion pump 16. The precision pressure sensor can be a 1630 disposable pressure sensor of MEAS. Compared with the precision pressure transmission membrane 13 in embodiment 1, the precision pressure sensor has more direct pressure transmission. The infusion pump determines whether the pump pressure is out of control according to the actual measured pressure value in the pipeline during operation.

[0055] The advantages of the present invention are as follows: 1. Compared with the traditional gravity infusion device, the infusion device of the present invention eliminates the drip pot and uses the infusion soft bag which is becoming a development trend as the liquid medicine container. The soft bag does not need to be hung up and can be placed near the pump, which is convenient for movement;

[0056] 2. The multifunctional safety component used in the present invention is provided with a one-way pressure opening mechanism, the opening pressure of which can prevent the liquid in the soft bag from unexpectedly flowing to the patient under the action of gravity when the pump has not started working or the infusion set has been taken out of the pump. At the same time, the opening pressure establishes a pressure threshold Pk (greater than the pressure provided by conventional gravity infusion, generally between 10Kpa-50Kpa). When the pump is working, the liquid medicine will flow to the patient through the one-way valve only when the pressure Pw generated in the pipeline after the pump is greater than the opening pressure threshold Pk, and this pressure threshold can be measured by a force (pressure) sensor arranged on the pump or built into the pipeline, which avoids the risk of infusion caused by uncontrolled pump pressure caused by factors such as improper coordination between the pump and the pipeline, wear of the pump itself, the influence of temperature factors on the hardness and elasticity of the pipeline, and unqualified mechanical dimensions of the pipeline;

[0057] 3. The multifunctional safety component is equipped with a precision pressure transmission mechanism or a built-in precision pressure sensor (such as: MEAS 1630 disposable pressure sensor). The precision pressure transmission mechanism can accurately transmit the pressure in the infusion tube after the pump to the force sensor on the infusion pump to obtain the pressure value in the tube, or directly transmit the signal to the infusion pump through the precision pressure sensor built into the pipeline. The infusion pump determines whether the pump pressure is out of control based on the actual measured pressure value in the pipeline during work.

[0058] 4. The infusion pump used in the present invention is provided with a force sensor (such as Honeywell's force sensor) that measures the pressure in the tube through the precision pressure transmission mechanism in the multifunctional safety component of the infusion set, or obtains the pressure value in the tube from the pressure sensor built into the infusion set, and is provided with analysis software to identify and determine whether there is a risk of pump pressure loss of control;

[0059] 5. The housing of the multifunctional safety component of the present invention is provided with a breathable filter mechanism, which includes a breathable hole connected to the liquid inlet cavity, and a breathable membrane is provided at the breathable hole. The breathable membrane can filter out the air in the pipeline during the infusion and discharge it to the outside of the infusion set, playing the role of filtering gas while quickly exhausting air;

[0060] 6. A precision filter membrane is provided in the shell, which divides the inner cavity of the shell into a liquid inlet cavity and a liquid outlet cavity. The liquid inlet cavity is connected to the liquid inlet, and the liquid outlet cavity is connected to the liquid outlet. The precision filter membrane can filter out the liquid medicine and particles larger than 0.5um-5um in the pipeline to ensure that the liquid medicine entering the liquid outlet cavity from the liquid inlet cavity is clean.

[0061] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A multifunctional safety component for a non-gravity infusion device, comprising a housing, with a liquid inlet and a liquid outlet on both sides of the housing, characterized in that: The shell is provided with a precision filter membrane, which divides the inner cavity of the shell into a liquid inlet cavity and a liquid outlet cavity. The liquid inlet cavity is connected to the liquid inlet, and the liquid outlet cavity is connected to the liquid outlet. A one-way pressure opening mechanism installation cavity is provided between the liquid outlet cavity and the liquid outlet. A one-way pressure opening mechanism is installed in the one-way pressure opening mechanism installation cavity. The one-way pressure opening mechanism includes an elastic deformation component. The top of the one-way pressure opening mechanism installation cavity is provided with a transition port. The top of the elastic deformation component corresponds to the transition port and contacts with the shoulder armor on both sides of the transition port. The liquid outlet cavity passes through the transition port. The port is connected with the installation cavity of the one-way pressure opening mechanism, and the installation cavity of the one-way pressure opening mechanism is connected with the liquid outlet. When the pressure generated in the pipeline after the pump is greater than the opening pressure threshold Pk of the one-way pressure opening mechanism, the top of the elastic deformation component is separated from the transition port, and the medical liquid will flow to the patient through the installation cavity of the one-way pressure opening mechanism. When the pressure generated in the pipeline after the pump is less than the opening pressure threshold Pk of the one-way pressure opening mechanism, the top of the elastic deformation component contacts the transition port, thereby playing a role of automatic closure of the pipeline to avoid self-flow.

2. A multifunctional safety component for a non-gravity infusion device according to claim 1, characterized in that: The one-way pressure opening mechanism includes a mounting seat fixed in the mounting cavity of the one-way pressure opening mechanism and an elastic pressure membrane arranged on the top of the mounting seat. The elastic pressure membrane corresponds to the transition port and contacts with the shoulder armors on both sides of the transition port.

3. A multifunctional safety component for a non-gravity infusion device according to claim 1, characterized in that: The one-way pressure opening mechanism includes a spring fixed in the one-way pressure opening mechanism installation cavity and a movable plunger arranged on the top of the spring. The movable plunger corresponds to the transition port and contacts with the shoulder armors on both sides of the transition port.

4. A multifunctional safety component for a non-gravity infusion device according to claim 2 or 3, characterized in that: The shell is provided with an air permeable filtering mechanism.

5. A multifunctional safety component for a non-gravity infusion device according to claim 4, characterized in that: The air permeable filtering mechanism comprises an air permeable hole communicated with the liquid inlet cavity, and an air permeable membrane is arranged at the air permeable hole.

6. A multifunctional safety component for a non-gravity infusion device according to claim 2 or 3, characterized in that: The shell is provided with a precise pressure transmission mechanism.

7. A multifunctional safety component for a non-gravity infusion device according to claim 6, characterized in that: The precision pressure transmission mechanism comprises a pressure transmission port connected to the liquid inlet cavity or the liquid outlet cavity, a precision pressure transmission membrane is arranged at the pressure transmission port, and the precision pressure transmission membrane contacts the force sensor on the infusion pump.

8. A multifunctional safety component for a non-gravity infusion device according to claim 6, characterized in that: The precision pressure transmission mechanism is a precision pressure sensor arranged on the inner wall of the liquid inlet cavity or the liquid outlet cavity. The signal of the precision pressure sensor is connected to the circuit of the infusion pump through a cable or a conductive node placed on the surface of the multifunctional safety component to transmit the pressure signal to the infusion pump.

9. A multifunctional safety component for a non-gravity infusion device according to claim 1, characterized in that: The liquid inlet is connected to an infusion pump tube of an infusion pump, and the liquid outlet corresponds to the patient through an infusion pipeline.

10. A multifunctional safety component for a non-gravity infusion device according to claim 7, characterized in that: The material of the precision filtration membrane is nuclear pore membrane, polyethersulfone (PES) or nylon medical grade microporous hydrophilic filter membrane material; the material of the elastic pressure membrane is 0.2-2mm medical silicone rubber medical grade elastic material; the material of the breathable membrane is polytetrafluoroethylene (PTFE) and polypropylene (PP) hydrophobic filter membrane material; the material of the precision pressure conduction membrane is 0.1-0.3mm thick PVC, PE, silicone medical grade film material.

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