Acute heart failure pre-hospital first-aid pressing auxiliary device

Abstract

The invention belongs to the technical field of first-aid cardiac compression, and particularly relates to an acute heart failure pre-hospital first-aid compression auxiliary device. The pressing unit is used for pressing the heart and lung of the patient; the breathing unit comprises a gas generating mechanism and a breathing tube, the gas generating mechanism is used for generating oxygen for the patient to breathe, one end of the breathing tube is communicated with the gas generating mechanism, and the other end of the breathing tube is located in the oral cavity of the patient. According to the scheme, the problem that artificial respiration needs to be operated manually is solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of emergency heart compression, and particularly relates to an acute heart failure pre-hospital emergency compression auxiliary device. BACKGROUND

[0002] Acute heart failure is an urgent medical condition that needs to be quickly identified and treated to prevent the condition from worsening. In a pre-hospital emergency environment, that is, before the patient arrives at the hospital, it is crucial to provide effective emergency measures. A heart compression auxiliary device can play an important role in this case.

[0003] At present, a heart compression auxiliary device with the publication number CN116725847A is disclosed on the market, which comprises a bed plate, straight rods symmetrically installed on both sides of the bed plate through sliding connection, a support plate fixedly installed at the top of the straight rods, an installation plate fixedly installed at one end of the support plate, a motor fixedly installed on the surface of the installation plate, a rotating disc fixedly installed at the output end of the motor, a rotating shaft fixedly installed on the surface of the rotating disc, a sliding sleeve with sliding connection sleeved on the rotating shaft, a sleeve hole matched with the rotating shaft arranged in the middle of the sliding sleeve, a connecting column fixedly installed at the bottom of the sliding sleeve, a sliding hole matched with the connecting column arranged on the surface of the support plate below the connecting column, and a pressing plate fixedly installed at the bottom of the sliding hole through the connecting column. The problem that it is difficult for a medical staff to complete the operation due to the long time consumption of the heart compression operation process and the great consumption of the physical energy of the medical staff is solved.

[0004] However, there is a problem that the air intake amount generated by mouth-to-mouth breathing rescue by a person is inaccurate, which can easily lead to the failure of cardiopulmonary resuscitation. SUMMARY

[0005] To solve the problem, the present scheme provides an acute heart failure pre-hospital emergency compression auxiliary device to solve the problem that the air intake amount generated by mouth-to-mouth breathing rescue by a person is inaccurate, which can easily lead to the failure of cardiopulmonary resuscitation.

[0006] The present scheme provides an acute heart failure pre-hospital emergency compression auxiliary device, which comprises: a bottom plate; a compression unit for compressing the heart and lungs of a patient; a breathing unit comprising a gas generating mechanism and a breathing tube, the gas generating mechanism being used to generate oxygen for the patient to breathe, and the breathing tube being in communication with the gas generating mechanism at one end and being located in the oral cavity of the patient at the other end.

[0007] The principle of the scheme is that when the pressing unit is started, the mechanical or pneumatic system starts to press the patient's chest regularly according to the preset parameters (such as 100 to 120 times of pressing per minute, and the depth of each pressing is at least 5 cm) to promote blood circulation. The gas generating mechanism is started according to the set working mode, and a proper amount of oxygen is generated every interval and delivered to the patient's oral cavity through the breathing tube. The patient inhales oxygen through the breathing tube to achieve passive artificial respiration support.

[0008] The beneficial effects of the scheme are: 1. The artificial respiration accuracy of the gas generating mechanism is high, the air intake amount is accurate, and the success rate of cardiopulmonary resuscitation can be effectively improved. 2. The scheme does not need people to perform mouth-to-mouth artificial respiration.

[0009] Further, the gas generating mechanism includes a pressing piston, a pressing cylinder, and a pressing rod, the pressing cylinder is provided with a pressing air inlet pipe and a pressing air outlet pipe, the pressing air outlet pipe is in communication with the breathing tube, the pressing air outlet pipe and the pressing air inlet pipe are both provided with a one-way valve, the pressing piston is in sliding sealing connection with the pressing cylinder, the pressing rod is in fixed connection with the pressing piston, and the pressing unit drives the pressing piston to move.

[0010] When artificial respiration is needed, the pressing unit is started, the pressing piston is controlled to move up and down, the pressing piston moves outward, and the pressure in the pressing cylinder is reduced. At this time, the one-way valve on the pressing air inlet pipe is opened, and the oxygen in the oxygen cylinder is sucked into the pressing cylinder. The operator then pushes the pressing rod inward, the pressing piston moves inward, and the air in the pressing cylinder is compressed. As the pressure rises, the one-way valve on the pressing air outlet pipe opens, the compressed gas is discharged through the pressing air outlet pipe, and delivered to the patient through the breathing tube.

[0011] The mechanism can continuously generate and deliver compressed oxygen by manually operating the pressing rod, providing necessary breathing support for the patient. This method is especially suitable for situations where electric equipment cannot be obtained immediately in emergency situations.

[0012] Further, the pressing unit includes a pressing block and a driving mechanism, the pressing block is in fixed connection with the pressing rod, and the pressing block cooperates with the bottom plate, and the driving mechanism drives the pressing piston to reciprocate.

[0013] When the driving mechanism is started, it drives the pressing rod to move up and down. The pressing rod is connected to the pressing piston and the pressing block, so the three move synchronously: when pressing downward, the pressing block exerts pressure on the patient's chest to complete a cardiac compression; then, the pressing piston moves upward in the pressing cylinder to compress the gas in the cylinder. The compressed gas is output through the pressing air outlet pipe and delivered to the patient through the breathing tube.

[0014] The mechanism integrates cardiac compression and oxygen supply ventilation in the same set of equipment, reduces the number of components, and improves portability and on-site deployment efficiency.

[0015] Further, the driving mechanism comprises a motor, a reset spring and a cam, the motor is fixedly connected with the pressing cylinder, the shaft of the motor is fixedly connected with the cam, the cam is matched with the pressing piston, one end of the reset spring is fixedly connected with the pressing cylinder, and the other end is fixedly connected with the pressing piston.

[0016] The motor starts, the cam rotates, the cam pushes the pressing piston to move downward, the pressure in the pressing cylinder decreases, the compressed gas enters the pressing cylinder, and the pressing block presses the patient.

[0017] The cam continues to rotate and the piston loses the pushing force, and under the action of the spring or other reset device, it returns upward, high pressure is formed in the cylinder, the one-way valve of the pressing inlet pipe opens, air enters the patient's body from the breathing pipe, and the cycle is repeated, continuously producing gas and delivering it to the patient's lungs.

[0018] The mechanism can control the rotation frequency of the cam by adjusting the rotation speed of the motor, thereby adjusting the reciprocating frequency of the pressing piston, and ultimately controlling the gas supply frequency and tidal volume, so that the gas supply is more in line with the clinical standard.

[0019] Further, it also includes an adjusting mechanism, which comprises a gas supply tank, a tension spring and a gas supply piston block, the cavity of the gas supply tank is matched with the cavity of the pressing cylinder, so one end of the tension spring is fixedly connected with the gas supply tank, and the other end is fixedly connected with the gas supply piston block. The gas supply piston block is in sliding and sealing connection with the gas supply tank, the breathing pipe is in communication with the gas supply tank, the breathing pipe is provided with a pressure valve, and the pressing exhaust pipe is in communication with the gas supply tank.

[0020] The motor starts, the cam rotates and pushes the pressing piston to complete the gas compression process. The gas will enter the gas supply tank from the pressing cylinder, and as the gas pressure in the gas supply tank increases, the gas pressure drives the gas supply piston block to move to the right. When the cam runs about 30 times, the pressure in the gas supply tank reaches the set value, the pressure valve of the breathing pipe opens, so that the gas is transmitted from the breathing pipe into the patient's body, and the tension spring resets. When it returns to the initial state, the gas supply tank is at the initial atmospheric pressure, the pressure is less than the pressure valve closing pressure, and the pressure valve closes. The mechanism will perform a mechanical breathing after 30 compressions.

[0021] The mechanism ensures that a mechanical breathing is automatically performed after each 30 compressions through the gas cavity setting and pressure setting, strictly follows the 30:2 ratio in the CPR guidelines, and improves the standardization and effectiveness of the resuscitation operation.

[0022] Further, it also includes a nasal tube and an air bag, the nasal tube is in communication with the air bag, the nasal tube is in communication with the gas supply tank, the air bag is used to block the patient's nose when the breathing pipe exhausts, and the gas supply piston block is matched with the nasal tube.

[0023] In the inspiration stage, the air supply piston block moves to the right under the action of the press cylinder continuously supplying air. The gas enters the air supply tank through the press exhaust pipe. When the internal accumulated pressure reaches the set value, the pressure valve opens. At this time, the nasal plug pipe also enters the left side of the air supply piston block. The gas in the air supply tank enters the air bag, and the air bag expands to block the nostrils. The air pipe supplies air to the patient's lungs. Then, the air supply piston block blocks the nasal plug pipe, so that the air bag gas in the nasal plug pipe does not flow out when the air pipe supplies air to the body.

[0024] When the air supply piston block moves back to the initial position, the air supply piston block passes through the nasal plug pipe, and the nasal plug pipe is connected with the outside. Since the outside is normal atmospheric pressure, the air bag contracts, and the patient's nostrils return to a state that can breathe. The patient is allowed to exhale voluntarily.

[0025] The air bag of the present mechanism automatically blocks the nostrils during the air supply stage to prevent gas from escaping from the nasal cavity, ensuring that gas is mainly exchanged through the lungs to improve alveolar gas exchange efficiency. At the same time, the gas in the air bag does not flow out during the air supply stage, so that the nostrils are not blocked when the air pipe supplies air to the body.

[0026] Further, it further comprises a lifting unit, the lifting unit comprises a lifting cylinder, a hydraulic pump, a fixed plate and a sliding rod, the lifting cylinder and the hydraulic pump are fixedly connected with the bottom plate, the hydraulic pump is communicated with the lifting cylinder, the lifting rod of the lifting cylinder is fixedly connected with the sliding rod, the fixed plate is fixedly connected with the bottom plate, the fixed plate is provided with a sliding groove, and the sliding rod is slidably connected with the sliding groove.

[0027] In the initial state, the lifting cylinder is in the extended state, the sliding rod is located at a position of the sliding groove, and the whole device is at the highest height. After the patient lies on the bottom plate, the hydraulic pump is started, and the hydraulic pump starts to work to pump hydraulic oil out of the lifting cylinder to reduce the pressure in the lifting cylinder. The lifting rod retracts, and as the hydraulic oil flows out of the lifting cylinder, the lifting rod gradually retracts until the pressing block contacts the human body, and the hydraulic pump stops working. When the person needs to get off the bottom plate, the hydraulic pump works in reverse to send hydraulic oil into the lifting cylinder to make the lifting rod rise, and the sliding rod moves upward along the sliding groove until it returns to the initial position or the required height. The person can get off the bottom plate.

[0028] The present mechanism can adjust the height of the pressing cylinder through the lifting mechanism, so that the pressing block can adapt to different types of people.

[0029] Further, it further comprises a binding belt, the binding belt is used for binding the patient, and the binding belt is fixedly connected with the bottom plate.

[0030] Lay the patient flat on the base plate, make sure his back is in contact with the surface of the base plate. Wrap the binding belt around the corresponding parts of the patient's body (such as the chest, waist, etc.), tighten and fix it by adjusting the buckle. Make sure the binding belt is not too tight, but can effectively limit the patient's movement. When performing cardiac compression, the patient's body will not be displaced due to the compression force, ensuring accurate compression position and consistent depth. At the same time, during mechanical ventilation, the body shaking also avoids the nasal tube from falling off.

[0031] Further, it further comprises a soft block, which is spherical, and a plurality of air holes are arranged on the soft block, and the soft block is communicated with the breathing tube. The spherical soft block is not easy to fall off from the patient's mouth, and the soft block is relatively soft, and only needs to be pressed flat when taking out. The soft block is provided with a plurality of air holes, which can effectively prevent the problem that the patient's oral cavity blocks the breathing tube. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a structural diagram of an acute heart failure pre-hospital first aid compression auxiliary device, Figure 2 It is an initial state diagram of an acute heart failure pre-hospital first aid compression auxiliary device, Figure 3 It is a maximum stroke diagram of a gas sending piston block of an acute heart failure pre-hospital first aid compression auxiliary device.

[0033] It is explained that the reference signs include: 1, base plate; 2, fixed plate; 3, lifting cylinder; 4, compression cylinder; 5, gas sending box; 6, lifting rod; 7, sliding groove; 8, sliding rod; 9, compression rod; 10, compression block; 11, auxiliary cylinder; 12, lifting piston; 13, compression piston; 14, cam; 15, compression intake pipe; 16, compression exhaust pipe; 18, gas sending piston block; 19, nasal tube; 20, air bag; 21, breathing tube; 22, soft block; 23, reset spring; 24, tension spring. DETAILED DESCRIPTION

[0034] As shown in the accompanying Figure 1 As shown: The scheme provides an acute heart failure pre-hospital first aid compression auxiliary device, which comprises a base plate 1, a compression unit, a breathing unit, an air bag 20 and a nasal tube 19.

[0035] The material of the base plate 1 is high-strength, light-alloy or composite material, which ensures the structural strength while reducing the overall weight. The base plate 1 serves as the basic support platform of the whole device, providing stability and carrying capacity.

[0036] The material of the fixed plate 2 is high-strength plastic or light metal. The fixed plate 2 provides guidance and support, ensuring smooth movement of the sliding rod 8 along the sliding groove 7. The fixed plate 2 is fixedly connected with the base plate 1 perpendicularly, and the middle of the fixed plate 2 is provided with a sliding groove 7.

[0037] The material of the slide bar 8 is high-strength metal or carbon fiber composite material. The slide bar 8 is fixedly connected with the lifting rod 6 and slides in the slide groove 7 to ensure stability during lifting. The slide bar 8 is fixedly connected with the pressing cylinder 4 to drive the pressing cylinder 4 to move up and down.

[0038] The material of the lifting cylinder 3 is high-strength aluminum alloy or stainless steel. The lifting cylinder 3 realizes telescopic movement through pressure change of hydraulic oil to adjust the height of the pressing block 10. The lifting cylinder 3 is in communication with the hydraulic pump. The lifting cylinder 3 is provided with a lifting piston 12 in sliding and sealing connection, one end of the lifting rod 6 is fixedly connected with the lifting piston 12, and the other end is fixedly connected with the slide bar 8.

[0039] The material of the hydraulic pump is high-efficiency hydraulic pump, and the shell is made of corrosion-resistant metal or engineering plastic. The hydraulic pump provides hydraulic power for the lifting cylinder 3 to control telescopic movement thereof. The hydraulic pump is fixedly connected with the bottom plate 1.

[0040] The material of the binding belt is high-strength nylon or polyester fiber, and the belt is provided with a buffer pad (such as foam or silica gel). The binding belt fixes the patient on the bottom plate 1 to prevent the equipment from failing due to pressing or body movement. The binding belt is fixedly connected with the bottom plate 1, surrounds the corresponding parts of the patient's body (such as the chest and waist), and is tightened through the adjusting buckle.

[0041] As shown in FIGS. 1-3, the device comprises a bottom plate 1, a lifting cylinder 3, a slide bar 8, a pressing cylinder 4, a lifting rod 6, a slide groove 7, a pressing block 10, a binding belt, a pressing piston 13, a pressing air inlet pipe 15, a pressing air outlet pipe 16, a cam 14, and a motor. Figure 1 Figure 2 The material of the pressing cylinder 4 is high-strength aluminum alloy or stainless steel. The pressing cylinder 4 is provided with a pressing air outlet pipe 16 and a pressing air inlet pipe 15. The pressing air outlet pipe 16 is in communication with the gas sending box 5, and the pressing air inlet pipe 15 is in communication with an oxygen tank or the outside. The pressing air outlet pipe 16 and the pressing air inlet pipe 15 are each provided with a one-way valve. The materials of the pressing air inlet pipe 15 and the pressing air outlet pipe 16 are medical-grade PVC or silica gel hose.

[0042] The pressing piston 13 is in sliding and sealing connection with the inside of the pressing cylinder 4. The material of the pressing piston 13 is wear-resistant metal or high-performance plastic, and the surface is coated with a lubricating layer.

[0043] The material of the motor is high-efficiency direct current motor, and the shell is made of corrosion-resistant metal or engineering plastic. The motor provides power to drive the cam 14 to rotate. The motor is fixedly connected with the pressing cylinder 4, and the shaft of the motor is fixedly connected with the cam 14.

[0044] ​​When the pressure valve opens, the motor needs to be manually controlled to close, and when the gas in the gas tank 5 is released, the pressure valve is closed, and then the motor is manually opened again to perform the pressing operation. Considering that manual control is too cumbersome, those skilled in the art can consider additionally setting a controller, electrically connecting the controller with the pressure valve and the motor, and writing a control program for the motor and the pressure valve (when the pressure in the gas tank 5 reaches the set value, the pressure valve opens, and the motor stops; when the gas in the gas tank 5 is released, the pressure valve closes, and the motor starts), so that automatic control can be completed.

[0045] The pressing block 10 is made of soft and elastic material (such as silica gel) to avoid causing harm to the patient's skin. The pressing block 10 directly contacts and presses the patient's chest to simulate the action of heart compression. The pressing block 10 is fixedly connected with the pressing piston 13 through the pressing rod 9 and is used in cooperation with the bottom plate 1.

[0046] The reset spring 23 is made of high-elasticity steel wire or carbon fiber composite material. The reset spring 23 helps the pressing piston 13 to reset after the cam 14 loses the pushing force. One end of the reset spring 23 is fixedly connected with the pressing cylinder 4, and the other end is fixedly connected with the pressing piston 13.

[0047] The cam 14 is made of wear-resistant metal or engineering plastic. The cam 14 pushes the pressing piston 13 to move up and down to realize heart compression. The cam 14 is fixedly connected with the motor shaft, and the cam 14 is in contact with the pressing piston 13.

[0048] An auxiliary cylinder 11 is further arranged between the pressing block 10 and the pressing piston 13, and the auxiliary cylinder 11 is used to keep the pressing block 10 balanced under force.

[0049] As shown in the accompanying drawings: Figure 2 , Figure 3 The gas tank 5 is made of high-strength plastic or light metal. The right side of the gas tank 5 is open, and the opening size allows the gas delivery piston block 18 to sealably slide out. The gas tank 5 serves as an intermediate container, receives the compressed gas from the pressing cylinder 4, and further compresses and delivers the gas to the patient. The cavity of the gas tank 5 can make the pressing cylinder 4 perform 30 times of gas delivery to make the gas tank 5 reach the set pressure of the pressure valve. Moreover, by changing the cavity of the gas tank 5 and the diameter of the breathing tube 21, those skilled in the art can control the gas delivery time of the breathing tube 21 to be about 4-6 seconds and the pressing time to be about 15-18 seconds.

[0050] The gas delivery piston block 18 is made of wear-resistant metal or high-performance plastic and is coated with a lubricating layer on the surface. The gas delivery piston block 18 seals and slides in the gas tank 5, compresses the gas, and pushes the gas to the breathing tube 21 and the air bag 20. The gas delivery piston block 18 is in sealable sliding connection with the gas tank 5. ​

[0051] The tension spring 24 is made of high-elasticity steel wire or carbon fiber composite material. The tension spring 24 provides restoring force and tension when the air delivery piston block 18 moves back. One end of the tension spring 24 is fixedly connected to the air delivery box 5, and the other end is fixedly connected to the air delivery piston block 18.

[0052] The breathing tube 21 is made of medical-grade PVC or silicone tubing. The breathing tube 21 delivers compressed gas from the air delivery box 5 to the patient's soft block 22. One end of the breathing tube 21 is connected to the air delivery box 5, and the other end is connected to the soft block 22. The breathing tube 21 is equipped with a pressure valve.

[0053] The soft block 22 is made of soft, skin-friendly silicone or medical-grade rubber. The soft block 22 is for the patient to hold in their mouth for easy oxygen inhalation. The soft block 22 is connected to the breathing tube 21 to prevent the breathing tube 21 from falling out.

[0054] The nasal cannula 19 is made of medical-grade PVC or silicone tubing. The nasal cannula 19 guides compressed gas from the air supply box 5 to the cuff 20 to block the patient's nostrils. The nasal cannula 19 is connected to the air supply box 5, and the air delivery piston block 18 reaches the position shown in the attached diagram. Figure 3 When the nasal cannula 19 is in the right-hand position, it is connected. The nasal cannula 19 is located to the left of the air delivery piston block 18. In the initial state and immediately after artificial respiration, the nasal cannula 19 is located to the right of the air delivery piston block 18 (as shown in the attached figure). Figure 2 As shown), during the gas supply and storage phases, the gas delivery piston block 18 blocks the nose plug tube 19. When the gas delivery piston block 18 reaches its maximum stroke on the right side, the nose plug tube 19 is located on the left side of the gas delivery piston tube and is in a connected state.

[0055] The airbag 20 is made of soft, expandable medical-grade rubber or silicone. During the inflatable phase, the airbag 20 automatically seals the nostrils to prevent air from escaping from the nasal cavity. Upon completion of inflatable operation, the airbag 20 is in a contracted state, ensuring the patient can breathe. The airbag 20 is connected to the nasal cannula 19.

[0056] like Figures 1-3 As shown: In practice, the patient lies on the base plate 1, and the lifting cylinder 3 moves the compression block 10 to a position that fits the patient. The motor starts, driving the cam 14 to rotate. The cam 14 pushes the compression piston 13 downward, completing one heart compression and drawing air in through the air intake pipe 15. When the compression piston 13 moves upward, the air in the compression cylinder 4 is compressed and enters the air supply box 5 through the compression exhaust pipe 16.

[0057] With the continuous pressing of the exhaust pipe 16 to send gas into the gas sending box 5, the gas sending piston block 18 will gradually move to the right, and the tension spring 24 will be continuously stretched to generate pressure in the gas sending box 5. After about 30 times of pressing, the gas sending piston block 18 moves to the set position, at this time, the nasal plug pipe 19 is located on the left side of the gas sending piston block 18, and the air bag 20 in the nasal plug pipe 19 expands to block the patient's nostrils. The gas sending box 5 also reaches the set pressure, and the pressure valve opens, and the gas is delivered to the soft block 22 through the breathing pipe 21 for the patient to inhale. At the same time, during the gas supply process, as the gas sending piston block 18 moves back, the gas sending piston block 18 will block the nasal plug pipe 19 to prevent the gas in the air bag 20 from flowing back, resulting in a weakened plugging effect.

[0058] When the gas sending piston block 18 returns to the original position, the gas sending box 5 returns to atmospheric pressure, the pressure valve closes, and at the same time, the nasal plug pipe 19 comes to the right side of the gas sending piston block 18, the nasal plug pipe 19 is connected with the outside, and the air bag 20 is contracted, so that the patient can breathe.

[0059] The beneficial effects of the present scheme are: 1. The device integrates heart compression and automatic oxygen supply function, reduces the demand for additional manpower, and enables a single first aid personnel to manage multiple key life support measures at the same time. 2. The soft block 22 is convenient for the patient to hold, and can also prevent the problem of falling of the breathing pipe 21. 3. The mechanism ensures that mechanical breathing is automatically performed once after 30 times of compression through gas cavity setting and pressure setting, strictly following the 30:2 ratio in the CPR guidelines, improving the standardization and effectiveness of the resuscitation operation. 4. The air bag 20 of the mechanism automatically blocks the nostrils during the gas supply stage to prevent gas from escaping from the nasal cavity, ensuring that gas is mainly exchanged through the lungs to improve alveolar gas exchange efficiency. At the same time, during the gas supply stage, the gas in the air bag 20 will not be lost, resulting in that the nostrils are not blocked when the breathing pipe 21 is supplying gas into the body.

[0060] The above is only an embodiment of the present application, and the specific structure and characteristics of the scheme are not described in detail. It should be noted that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application. The protection scope claimed in this application should be subject to the content of its claims, and the specific implementation mode and the like recorded in the specification can be used to explain the content of the claims.

Claims

1. A pre-hospital emergency chest compression assist device for acute heart failure, comprising: Base plate (1); Compression unit: Used for compressing the patient's heart and lungs; Its characteristic is that it further includes: Breathing unit: The breathing unit includes a gas generating mechanism and a breathing tube (21). The gas generating mechanism is used to generate oxygen for the patient to breathe. One end of the breathing tube (21) is connected to the gas generating mechanism, and the other end is located in the patient's mouth.

2. The pre-hospital emergency chest compression assist device for acute heart failure according to claim 1, characterized in that, The gas-generating mechanism includes a pressing piston (13), a pressing cylinder (4), and a pressing rod (9). The pressing cylinder (4) is provided with a pressing air inlet pipe (15) and a pressing exhaust pipe (16). The pressing exhaust pipe (16) is connected to the breathing tube (21). Both the pressing exhaust pipe (16) and the pressing air inlet pipe (15) are provided with one-way valves. The pressing piston (13) is slidably and sealed to the pressing cylinder (4). The pressing rod (9) is fixedly connected to the pressing piston (13). The pressing unit drives the pressing piston to move.

3. The pre-hospital emergency chest compression assist device for acute heart failure according to claim 2, characterized in that, The pressing unit includes a pressing block (10) and a driving mechanism. The pressing block (10) is fixedly connected to the pressing rod (9), and the pressing block (10) cooperates with the base plate (1). The driving mechanism drives the pressing piston (13) to reciprocate.

4. The pre-hospital emergency chest compression assist device for acute heart failure according to claim 3, characterized in that, The drive mechanism includes a motor, a return spring (23) and a cam (14). The motor is fixedly connected to the pressing cylinder (4), the shaft of the motor is fixedly connected to the cam (14), the cam (14) cooperates with the pressing piston (13), one end of the return spring (23) is fixedly connected to the pressing cylinder (4), and the other end is fixedly connected to the pressing piston (13).

5. The pre-hospital emergency chest compression assist device for acute heart failure according to claim 4, characterized in that, It also includes an adjustment mechanism, which includes an air supply box (5), a tension spring (24) and an air supply piston block (18). The cavity of the air supply box (5) is matched with the cavity of the pressing cylinder (4). One end of the tension spring (24) is fixedly connected to the air supply box (5) and the other end is fixedly connected to the air supply piston block (18). The air delivery piston block (18) is slidably sealed to the air delivery box (5), the breathing tube (21) is connected to the air delivery box (5), the breathing tube (21) is equipped with a pressure valve, and the press exhaust pipe (16) is connected to the air delivery box (5).

6. The pre-hospital emergency chest compression assist device for acute heart failure according to claim 5, characterized in that, It also includes a nasal tube (19) and an air bag (20), the nasal tube (19) being connected to the air bag (20) and the air delivery box (5), the air bag (20) being used to block the patient's nose when the breathing tube (21) is vented, and the air delivery piston block (18) cooperating with the nasal tube (19).

7. The pre-hospital emergency chest compression assist device for acute heart failure according to claim 1, characterized in that, It also includes a lifting unit, which includes a lifting cylinder (3), a hydraulic pump, a fixed plate (2) and a slide rod (8). The lifting cylinder (3) and the hydraulic pump are both fixedly connected to the base plate (1). The hydraulic pump is connected to the lifting cylinder (3). The lifting rod (6) of the lifting cylinder (3) is fixedly connected to the slide rod (8). The fixed plate (2) is fixedly connected to the base plate (1). The fixed plate (2) is provided with a sliding groove (7). The slide rod (8) is slidably connected to the sliding groove (7).

8. The pre-hospital emergency chest compression assist device for acute heart failure according to claim 1, characterized in that, It also includes a binding strap for binding the patient and the binding strap is fixedly connected to the base plate (1).

9. The pre-hospital emergency chest compression assist device for acute heart failure according to claim 1, characterized in that, It also includes a soft block (22), which is spherical and has multiple air holes. The soft block (22) is connected to the breathing tube (21).

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