External counterpulsation positive and negative pressure air path system

Abstract

The invention discloses an external counterpulsation positive and negative pressure air path system which comprises a bearing body and an air path system, the air path system comprises an air compressor, a positive pressure tank (safety valve), a negative pressure tank (gulp valve), an electromagnetic valve and a connecting pipe fitting, one end of the air compressor is connected with the positive pressure tank through the connecting pipe fitting, and the other end of the air compressor is connected with the negative pressure tank through the connecting pipe fitting; the positive pressure tank and the negative pressure tank are respectively connected with the electromagnetic valve through connecting pipe fittings, the electromagnetic valve is divided into three pipelines, the three pipelines are communicated and connected with an air channel pipeline formed by the bearing body through the connecting pipe fittings, and finally the three pipelines are externally connected with an air bag of a terminal. The external counterpulsation device related to the design is additionally provided with a negative pressure gas path system, positive pressure is used during inflation, negative pressure is used for assisting in pumping and exhausting gas in a gas bag during the end of diastole and exhausting, so that the gas bag is quickly exhausted, and due to the fact that exhausting is more sufficient, elastic potential energy stored in the blood vessel wall is instantly converted into kinetic energy, and the gas path closed loop is formed. And the blood vessel wall is driven to rapidly rebound to try to recover to the original shape and diameter when the blood vessel wall is not pressed, so that the heart ejection accommodating capability of the artery lumen can be further improved, the end diastolic pressure is reduced, the systolic pressure is obviously reduced, the heart post-load is obviously reduced, and the counterpulsation effect is better.

Description

Technical Field

[0001] This invention discloses an external counterpulsation positive and negative pressure airway system, belonging to the field of medical device technology. Background Technology

[0002] External counterpulsation (ECP) devices have a good therapeutic effect on cardiovascular diseases. By improving blood circulation, they can produce beneficial therapeutic and rehabilitative effects on various organs of the body. In other ECP technologies, the ECP device uses a pneumatic system where a compressor pressurizes the air, and the air is directly discharged into the air during the exhaust process. This does not form a closed loop and is a one-way inflation and deflation process. The exhaust valve in this design is open, so the gas in the airbag is not completely expelled into the air, resulting in incomplete decompression of the airbag. Pressure remains at the contact point of the airbag, meaning that the blood vessels are always under pressure, which affects the therapeutic effect.

[0003] Furthermore, Chinese patent 88203328.X discloses a positive and negative pressure airflow circulation type external counterpulsation device. This device uses a computer-monitored positive and negative pressure gas distribution system to sequentially and periodically inflate and deflate the airbag via a solenoid valve. The deflated gas enters a negative pressure tank through the solenoid valve, and a pipe on the negative pressure tank introduces the gas into the air compressor pump inlet. This forms a closed gas circulation path where compressed air from the air compressor pump sequentially enters the airbag for counterpulsation before re-entering the air compressor inlet. However, the patent document lacks an actual product structure and a pressure-stabilizing design. Due to the back pressure of the airflow within the closed airflow path, it is highly susceptible to slow inflation and incomplete deflation during treatment, thus affecting the therapeutic effect.

[0004] The applicant filed a patent application on January 31, 2019, with patent number 2019101000232 and patent name "Special Gas Distribution Valve for External Counterpulsator". The solution described in that patent is the solenoid valve in the solution of this application. Summary of the Invention

[0005] To address the aforementioned problems in the existing technology, the purpose of this invention is to provide an external counterpulsation positive and negative pressure airway system that, through structural optimization, enables the air supply system and the exhaust system to form a closed loop system.

[0006] To achieve the above-mentioned objectives, the technical solution adopted by the present invention is as follows: An external counterpulsation positive and negative pressure airway system includes a carrier and an airway system. The airway system includes an air compressor, a positive pressure tank, a negative pressure tank, a solenoid valve, and connecting pipes. One end of the air compressor's exhaust is connected to the positive pressure tank via connecting pipe I, and the other end is connected to the negative pressure tank via connecting pipe II. The positive pressure tank and the negative pressure tank are respectively connected to the solenoid valve via connecting pipes III and IV. The solenoid valve is provided with a venting port. One end of connecting pipe V is connected to the venting port, and the other end is connected to the airway pipe formed by the carrier, ultimately connecting to an external terminal airbag. The airway system includes an air supply system and an exhaust system, which form a closed loop system.

[0007] Furthermore, the air supply system starts from the exhaust end of the air compressor, passes through connecting fitting I, positive pressure tank, connecting fitting III, solenoid valve, connecting fitting V, and air pipeline, and ends at the air bag. The function of the air supply system is to pressurize and supply air to the air bag at the end of the air supply system.

[0008] Furthermore, the exhaust system starts from the exhaust end of the air compressor, passes through connecting pipe II, negative pressure tank, connecting pipe IV, solenoid valve, connecting pipe V, air pipeline, and finally to the airbag. The function of the exhaust system is to quickly extract the air from the airbag and depressurize it.

[0009] Furthermore, the carrier, such as the bed or other frame, is a structural component. The carrier frame is designed as a hollow structure, forming part of the air passage between the solenoid valve and the air bag, reducing the number of external pipes. The carrier guides the air, resulting in a compact overall structure and convenient air passage installation and disassembly.

[0010] Furthermore, in addition to interface I for connecting pipe V, the carrier frame also has interface II for connecting to an external airbag, and the inner cavity of the carrier frame is used as an air passage.

[0011] Furthermore, the solenoid valve has three air inlets, which are connected to three connecting pipes V. The solenoid valve has three in-feed and out-feed air channels, one air inlet channel, one air outlet channel, and a piston inside. The air inlet channel and the air outlet channel are connected to the three in-feed and out-feed air channels respectively, and the piston is installed in the air inlet channel and the air outlet channel respectively. The air inlets are connected to the in-feed and out-feed air channels. The solenoid valve has a compact structure and can quickly switch between the air supply system and the exhaust system.

[0012] Furthermore, the positive pressure tank is equipped with a pressure regulating valve and a safety valve. The safety valve is used to prevent the compressor from putting excessive pressure on the gas in the positive pressure tank and to discharge the gas. The pressure regulating valve is used to keep the positive pressure tank at a stable pressure value.

[0013] Furthermore, the negative pressure tank is equipped with an air replenishment valve to prevent the air pressure inside the negative pressure tank from becoming too low and to replenish air in real time.

[0014] The beneficial effects are as follows: The external counterpulsation device involved in this invention is equipped with a negative pressure airway system. Positive pressure is used when inflating and negative pressure is used when deflation to assist in the rapid degassing of the gas bag. As the degassing is more complete, the originally compressed blood vessels rebound and recover more quickly and thoroughly, which can further increase the ability to accommodate cardiac ejection, reduce end-diastolic pressure, significantly reduce systolic pressure, significantly reduce cardiac afterload, and make the counterpulsation effect better.

[0015] This invention optimizes the structure, making the inner cavity of the carrier part serve as a gas passage system for filling and venting, resulting in a compact overall structure that avoids gas passage entanglement. It completely solves the problem of difficult aging and maintenance of traditional PVC gas passage pipes, achieving lifetime maintenance-free operation in sync with the equipment's lifespan.

[0016] The present invention is equipped with a pressure regulating valve and a safety valve on the positive pressure tank and an air replenishment valve on the negative pressure tank. In conjunction with the solenoid valve, the air path is switched to ensure that the air supply system and the exhaust system are kept within a stable pressure range, thereby achieving rapid inflation and faster and cleaner exhaust. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a preferred embodiment of an external counterpulsation positive and negative pressure airway system provided by the present invention; Figure 2 This is a schematic diagram of a preferred embodiment of an external counterpulsation positive and negative pressure airway system provided by the present invention; Figure 3 This is a schematic diagram of a preferred embodiment of an external counterpulsation positive and negative pressure airway system provided by the present invention; Figure 4 This is a schematic diagram of a preferred embodiment of an external counterpulsation positive and negative pressure airway system provided by the present invention; Figure 5 This is a schematic diagram of a solenoid valve in a preferred embodiment of an external counterpulsation positive and negative pressure airway system provided by the present invention. Detailed Implementation

[0018] The present invention will now be described in further detail and in complete detail with reference to the accompanying drawings and preferred embodiments.

[0019] Figure 1-5The present invention provides an external counterpulsation positive and negative pressure airway system, comprising a carrier 1 and an airway system 2. The airway system 2 includes an air compressor 3, a positive pressure tank 4, a negative pressure tank 5, a solenoid valve 6, and connecting pipes 7. One exhaust end of the air compressor 3 is connected to the positive pressure tank 4 via connecting pipe I 701, and the other exhaust end is connected to the negative pressure tank 5 via connecting pipe II 702. The positive pressure tank 4 and the negative pressure tank 5 are respectively connected to the solenoid valve 6 via connecting pipe III 703 and connecting pipe IV 704. The solenoid valve 6 is provided with an air inlet for connecting... Fitting V 705 is connected to a vent at one end and to an air passage 706 formed by the carrier at the other end, ultimately connecting to the external airbag. The air system 2 includes a supply system 201 and an exhaust system 202, forming a closed loop system. The supply system 201 starts from the exhaust end of the air compressor 3, passes through connecting fitting I 701, the positive pressure tank 4, connecting fitting III 703, the solenoid valve 6, connecting fitting V 705, and the air passage 706, and ends at the airbag. The exhaust system… System 202 starts from the exhaust end of air compressor 3, passes through connecting pipe II 702, negative pressure tank 5, connecting pipe IV 704, solenoid valve 6, connecting pipe V 705, and air passage 706, to the airbag. The support body 1 frame is designed as a hollow structure, forming part of the air passage 706 between solenoid valve 6 and airbag. In addition to the interface I 101 for connecting pipe V 705, the support body 1 frame also has an interface II 102 for connecting to the external airbag. Solenoid valve 6 has three air inlets 601, corresponding to... Three connecting pipe fittings V705 are connected. The solenoid valve 6 has three air passages 602, one air inlet passage 603, one air outlet passage 604 and a piston 605. The air inlet passage 603 and the air outlet passage 604 are respectively connected to the three air passages 602, and the piston 605 is installed in the air inlet passage 603 and the air outlet passage 604 respectively. The air inlet 601 is connected to the air passages 602. The positive pressure tank 4 is equipped with a pressure regulating valve 402 and a safety valve 401, and the negative pressure tank 5 is equipped with a replenishing air valve 501.

[0020] During the procedure, the airbag is applied to the lower limbs and buttocks of the patient. Based on the patient's heart rate, the solenoid valve controls the rapid intermittent switching of the air circuit system. There are only two possible air circuit switching scenarios: one is that the air supply system is on and the exhaust system is off, and the other is that the air supply system is off and the exhaust system is on. The air compressor continuously supplies air to the positive pressure tank and pressurizes it, while exhausting air from the negative pressure tank to create negative pressure. Because the positive pressure tank is equipped with a pressure regulating valve and a safety valve, the gas inside the positive pressure tank is kept at a constant pressure. When the pressure inside the positive pressure tank is too high, the safety valve will release pressure to the constant pressure. The negative pressure tank is equipped with a replenishing valve. When the pressure inside the negative pressure tank is too low, the negative pressure tank will be inflated to a constant pressure. When the air supply system is turned on and the exhaust system is turned off, the piston in the intake passage of the solenoid valve opens and the piston in the exhaust passage closes. Under pressure, the gas in the positive pressure tank flows through connecting pipe III, the intake and return air passages of the solenoid valve, connecting pipe V, and the air pipeline to the air bag. At this time, the air bag is under pressure. When the gas in the positive pressure tank flows into the air bag, the gas pressure in the positive pressure tank will decrease. Since the air compressor is running continuously, it will automatically add gas to the positive pressure tank through connecting pipe I.

[0021] When the air supply system is shut off and the exhaust system is turned on, the piston in the intake passage of the solenoid valve closes and the piston in the exhaust passage opens. Under the suction of negative pressure, the pressurized gas that was originally in the air bag passes through the air bag, air pipeline, connecting fitting V, the inlet and outlet passages of the solenoid valve, and connecting fitting IV, and enters the negative pressure tank. After entering the negative pressure tank, the pressure inside the negative pressure tank will increase. Since the air compressor is running continuously, it will automatically draw the gas in the negative pressure tank into the air compressor through connecting fitting II.

[0022] Finally, it is necessary to state that the above embodiments are only used to further illustrate the technical solution of the present invention in detail, and should not be construed as limiting the scope of protection of the present invention. Any non-essential improvements and adjustments made by those skilled in the art based on the above content of the present invention shall fall within the scope of protection of the present invention.

Claims

1. An external counterpulsation positive and negative pressure pneumatic system, comprising a carrier and a pneumatic system, the pneumatic system comprising an air compressor, a positive pressure tank, a negative pressure tank, a solenoid valve, and connecting pipes, characterized in that: One end of the air compressor exhaust is connected to the positive pressure tank via connecting pipe I, and the other end is connected to the negative pressure tank via connecting pipe II. The positive pressure tank and the negative pressure tank are connected to the solenoid valve via connecting pipe III and connecting pipe IV, respectively. The solenoid valve is equipped with a venting port. One end of connecting pipe V is connected to the venting port, and the other end is connected to the air passage pipe formed by the carrier body, and finally connected to the air bag of the external terminal. The air passage system includes an air supply system and an exhaust system, which form a closed loop system.

2. The external counterpulsation positive and negative pressure airway system according to claim 1, characterized in that: The air supply system starts from the exhaust end of the air compressor, passes through connecting fitting I, positive pressure tank, connecting fitting III, solenoid valve, connecting fitting V, and air pipeline, and ends at the air bag.

3. The external counterpulsation positive and negative pressure airway system according to claim 1, characterized in that: The exhaust system starts from the exhaust end of the air compressor, passes through connecting fitting II, negative pressure tank, connecting fitting IV, solenoid valve, connecting fitting V, and air pipeline, and ends at the airbag.

4. The external counterpulsation positive and negative pressure airway system according to claim 1, characterized in that: The carrier is designed as a hollow structure, forming part of the air passage between the solenoid valve and the airbag.

5. An external counterpulsation positive and negative pressure airway system according to claim 4, characterized in that: In addition to interface I for connecting pipe fitting V, the support frame (bed or other) is also provided with interface II for connecting external airbags.

6. The external counterpulsation positive and negative pressure airway system according to claim 1, characterized in that: The solenoid valve has three vent ports, which are connected to three connecting pipes V. The solenoid valve has three air passages, one air inlet passage, one air outlet passage, and a piston (for charging or venting; as explained later, the air inlet and air outlet passages are equipped with pistons respectively). The air inlet and air outlet passages are connected to the three air passages, and the pistons are installed in the air inlet and air outlet passages respectively. The vent ports are connected to the air passages.

7. The external counterpulsation positive and negative pressure airway system according to claim 1, characterized in that: The positive pressure tank is equipped with a pressure regulating valve and a safety valve.

8. An external counterpulsation positive and negative pressure airway system according to claim 1, characterized in that: The negative pressure tank is equipped with a gas replenishment valve.

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