CN207323638U - A kind of Novel rehabilitation and the air bed for preventing bedsore - Google Patents

Abstract

The utility model relates to a new type of air bed for rehabilitation and prevention of decubitus, which comprises an air bed body and a mattress arranged on the air bed body and matched with it. Arranged air bag unit, air pump system, and computer control system. The utility model has a simple structure, and can control the air pressure in the airbag unit at timing (t), constant pressure (P), and fixed point (x, y), so that the contact surface between the mattress and the patient presents a specific support surface according to the needs of the disease. It enables patients to get rehabilitation exercises unconsciously, improves the treatment effect, and shortens the hospital stay; at the same time, it can prevent and treat bedsores, and reduce the cost of patients and the burden of nursing staff.

Description

A new type of air bed for rehabilitation and prevention of decubitus

technical field

The utility model relates to the technical field of medical equipment, in particular to a novel air bed for rehabilitation and prevention of bedsores.

Background technique

Clinically, many critically ill patients are affected by various diseases and need to stay in bed for a long time. If they do not receive timely rehabilitation treatment, the patient's condition will aggravate or the recovery time will be delayed, and the treatment effect will be significantly weakened; , the blood circulation in the back is not smooth, if you don’t pay attention to turning over regularly, parts of the body (especially the bony protruding parts) are often prone to infection and death of the patient due to these reasons, which adds manpower, weakness and time to nursing.

Chinese patent 201320690919.9 discloses a medical air bed that can automatically change the pressure point, including an air bed body and an air mattress matching it on the air bed body. The strip-shaped airbag units arranged side by side in the horizontal direction are formed, the odd-numbered strip-shaped airbag units in the strip-shaped airbag units communicate with each other through the first air guide tube, and the even-numbered strip-shaped air bag units communicate with each other through the second air guide tube. The first and second air ducts are respectively connected with peristaltic pumps; the air-cushion bed can be controlled regularly, and the rate, frequency and direction of peristalsis can be controlled to prevent bed sores from occurring without affecting sleep quality. Chinese patent 201020643453.3 discloses a medical anti-decubitus air bed, which includes an air bed body and an air mattress matched with it on the air bed body. , and continuous wavy strip airbag units, the odd strip airbag units of these strip airbag units communicate with each other through the same air duct, and the even strip air bag units communicate with each other through the same air duct, each air duct Connected with the air source components respectively, the air mattress can well prevent decubitus from occurring in bedridden patients. The above-mentioned air mattress in the prior art does not have the functions of timing, fixed point, constant pressure, and on-demand rehabilitation exercises for different parts of the patient and the prevention and treatment of bedsores; the effect is not good for seriously ill patients, especially those who are bedridden for a long time and cannot take care of themselves or paraplegia patients. , still needs a lot of nursing work. Therefore, it is necessary to develop a new type of air bed for rehabilitation and prevention of decubitus, which can increase the therapeutic effect of patients, prevent and treat decubitus, reduce the burden of medical care, and save medical expenses.

Contents of the invention

The first purpose of the utility model is to provide a new type of air bed for rehabilitation and prevention of decubitus in view of the deficiencies in the prior art.

For realizing above-mentioned first object, the technical scheme that the utility model takes is:

A new type of air bed for rehabilitation and prevention of decubitus, including an air bed body, and a mattress arranged on the air bed body and matched with it, the mattress is composed of a number of airbag units that are independent of each other and arranged in a matrix , air pump system, and computer control system;

The airbag unit includes an airbag inlet, an airbag outlet, a first pressure sensing device, and an air inlet valve and an air outlet valve respectively arranged on the airbag inlet and outlet; the airbag inlet is connected to an air pump through a high-pressure pipeline, and the airbag outlet is connected to a low-pressure pipeline The inlet valve, the outlet valve and the first pressure sensing device are connected to the computer control system through wires. The first pressure sensing device senses the pressure in the airbag unit and converts it into a signal to feed back to the computer control system. The computer control system is based on The set program issues instructions to control the inflow and outflow of the air valve by controlling the opening and closing of the inlet valve and the outlet valve, so that the airbag units in different matrix positions can meet the pressure support requirements of a single point in the matrix, and the contact surface between the mattress and the patient Specific support surfaces are presented as required by the condition.

Described concrete control process is as follows:

Inflation: According to the requirements of the disease, the program sets the pressure of the airbag unit at the point (X, Y) in the airbag unit arranged in a matrix as P. At this time point T1, the first pressure sensing device detects that the pressure of the airbag unit is P1. If P1 <P, the first pressure sensing device converts the sensed pressure value P1 into an electrical signal and feeds it back to the computer control system. Inflate, when the pressure in the airbag unit reaches P, the intake valve is closed, and the airbag unit stops inflating, this time point is t2.

Deflation: According to the requirements of the disease, the program sets the pressure of the airbag unit at the point (X, Y) in the airbag unit arranged in a matrix as P, and the pressure of the airbag unit detected by the first pressure sensing device at this time point T1 is P2, if P2>P, the first pressure sensing device converts the sensed pressure P2 value into an electrical signal and feeds it back to the computer control system. When the pressure in the airbag unit reaches P, the outlet valve is closed, and the airbag unit stops deflation. This time point is t2.

Airbag unit matrix combination: different airbag unit positions (X, Y), different pressure requirements (P) and different time points (t) are combined to form different patient contact surface modes, as shown in Figure 4. Modes 1, 2, 3, As shown in 4, modes 1 and 2 indicate that the air mattress presses the contact surface of the patient at different time points t or prevents the occurrence of decubitus through different contact surfaces; mode 3 indicates that the decubitus is emptied so that the patient’s decubitus will not be under pressure , so as to achieve the purpose of treatment; Mode 4 indicates that the best contact surface should be adjusted according to the patient's body position and the size of the bedsore, so that the patient can receive proper support while lying in bed for a long time. The airbag unit matrix combination of the utility model can also set a variety of different treatment modes according to specific usage conditions. Each mode can be defined according to the patient's needs in terms of position, pressure and time point, so that the contact between the mattress and the patient The surface presents different contact surfaces at different times, and can perform peristaltic massage on specific parts of the patient through the up and down peristalsis of the airbag unit at a specific time (such as before going to bed at night), guide the patient to turn over regularly, and prevent the blood circulation caused by the patient's long-term bed rest It can increase the therapeutic effect of patients, prevent and treat bedsores, reduce the burden of medical care and save medical expenses.

The air pump system includes an air pump, a high-pressure pipeline, a low-pressure pipeline, a second pressure sensing device, a third pressure sensing device, and an end air valve; the second pressure sensing device is arranged in the high-pressure pipeline, and the third pressure sensing device The sensing device is arranged in the low pressure pipeline, the terminal air valve is arranged at the end of the high and low pressure pipeline, and the air pump, the second pressure sensing device, the third pressure sensing device and the terminal air valve are respectively connected to the computer control system through wires; The second pressure sensing device senses the air pressure in the high-pressure pipeline and converts it into a signal to feed back to the computer control system. The computer control system issues instructions according to the set program to control the high pressure by controlling the opening and closing of the air pump and the terminal air valve. The pressure in the pipeline; the third pressure sensing device senses the air pressure in the low-pressure pipeline and converts it into a signal to feed back to the computer control system. Open and close to control the pressure in the low pressure line.

Described concrete control process is as follows:

If the pressure induced by the second pressure sensing device in the high-pressure pipe is lower than the pressure in the high-pressure pipe set by the program, the end air valve is closed, and the air pump pumps air until the high-pressure pipe reaches the preset pressure requirement; The pressure sensed by the pressure sensing device is higher than the pressure in the high-pressure line set by the program, the end air valve is opened to deflate, and the air pump is closed until the high-pressure line reaches the preset pressure requirement.

The computer control system controls the air bag unit and the air pump system in each matrix at timing, fixed point and constant pressure according to the set program.

Further, the mattress is composed of independent airbag units arranged in m×n, an air pump system, and a computer control system, the m is 2-10000, and the m is 2-10000.

Further, the pressure sensing device is a pressure sensor or a barometer.

Further, the high-pressure pipeline is a three-way pipe, one of the ports is provided with a terminal air valve, and the other two ports are respectively connected to the air pump and the inlet of the air bag.

Further, the low-pressure pipeline is a three-way pipe, one port is provided with a terminal air valve, one port is connected to the outlet of the air bag, and the other port is closed.

Further, the contact surface between the airbag unit and the patient is a rectangle, and the area of the rectangle is 4-10cm ² .

The utility model has the advantages that:

1. The air cushion bed of the present utility model can control the air pressure in the air bag unit at timing (t), constant pressure (P), and fixed point (x, y), so that the air bag units at different matrix positions meet the requirements of a single point in the matrix. Pressure support requirements, the contact surface between the mattress and the patient presents a specific support surface according to the needs of the condition, so that the patient can receive rehabilitation exercises unconsciously, improve the treatment effect, and shorten the hospital stay; at the same time, it can prevent and treat bedsores, reduce the cost of patients and Nursing staff burden.

2. The air mattress of the present utility model can be set with a variety of different treatment modes according to specific usage conditions. Each mode can be defined according to the patient's needs in terms of position, pressure and time point, so that the contact surface between the mattress and the patient can be It presents different contact surfaces at different times, and can perform peristaltic massage on specific parts of the patient through the up and down peristalsis of the airbag unit at a specific time (such as before going to bed at night), guide the patient to turn over at regular intervals, and prevent the patient from poor blood circulation caused by prolonged illness and bed rest , to increase the therapeutic effect of patients.

3. In the present utility model, the contact surface between the airbag unit and the patient is rectangular, and the area of the rectangle is 4-10cm ² , which is the optimal design area. If the rectangular area is too large, it is composed of airbag units The support surface has a low degree of fit with the patient, and there will be a sense of unevenness, making it uncomfortable to use; if the rectangular area is too small, the number of airbag units and air pump systems will increase under the same area size, and the manufacturing cost of the air mattress will be increased. . The limitation of the rectangular area ensures that the airbag unit can form the best contact surface suitable for the patient according to the needs, so that it can fit the patient's body parts, especially the bony protruding parts or bedsores accurately, so that the protruding parts are not under pressure, and the adjacent The position can be properly supported, which is conducive to the rehabilitation of patients who have been bedridden for a long time.

Description of drawings

Accompanying drawing 1 is the structural representation of the utility model air mattress.

Accompanying drawing 2 is the schematic plan view of mattress in the utility model.

Accompanying drawing 3 is the structure of the air bag in the utility model, and the connection diagram of air bag unit, air pump and computer control system.

Accompanying drawing 4 is the cross-sectional schematic view of the different modes of the contact surface between the air mattress and the patient under computer control.

Detailed ways

Below in conjunction with specific embodiment, further elaborate the utility model. It should be understood that these embodiments are only used to illustrate the present utility model and are not intended to limit the scope of the present utility model. In addition, it should be understood that after reading the contents of the utility model, those skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by the appended claims of the application.

The reference signs and components involved in the accompanying drawings are as follows:

1. Air bed body 2. Mattress 3. Airbag unit

4. Air pump system 5. Computer control system 6. Air bag inlet

7. Airbag outlet 8. First pressure sensing device 9. Intake valve

10. Air outlet valve 11. Air pump 12. High pressure pipeline

13. Low pressure pipeline 14. Second pressure sensing device 15. Third pressure sensing device

16. End air valve

Embodiment 1 A kind of air mattress of novel rehabilitation and prevention and treatment of decubitus

Please refer to Fig. 1-Fig. 4, accompanying drawing 1 is the structural representation of the utility model air mattress, accompanying drawing 2 is the plane schematic diagram of the mattress in the utility model, accompanying drawing 3 is the structure of the airbag in the utility model, and the airbag unit 1. A schematic diagram of the connection between the air pump and the computer control system. Accompanying drawing 4 is a cross-sectional schematic diagram of different modes of contact surfaces between the air mattress and the patient under computer control.

A new type of air bed for rehabilitation and prevention of decubitus, including an air bed body 1, and a mattress 2 arranged on the air bed body 1 and matched with it. The mattress 2 is composed of several independent and m×n An airbag unit 3 arranged in a matrix, an air pump system 4, and a computer control system 5 are formed, the value range of m is 2-10000, the value range of n is 2-10000, and the contact surface between the airbag unit 3 and the patient is Rectangle, the area of the rectangle is 4-10cm ² . The computer control system 5 controls the air pressure in the airbag unit 3 at different matrix positions, so that the airbag unit 3 presents a specific support surface on the contact surface with the patient, which can meet the needs of the patient for rehabilitation and prevention of decubitus according to the condition. The airbag unit 3 includes an airbag inlet 6, an airbag outlet 7, a first pressure sensing device 8, and an inlet valve 9 and an air outlet valve 10 respectively arranged on the airbag inlet and outlet, and the first pressure sensing device 8 is a barometer Or a pressure sensor, the airbag inlet 6 is connected to the air pump 11 through the high-pressure pipeline 12, the airbag outlet 7 is connected to the low-pressure pipeline 13, and the inlet valve 9, the outlet valve 10, and the first pressure sensing device 8 are controlled by wires and a computer The system 5 is connected, and the first pressure sensing device 8 senses the air pressure in the airbag unit 3 and converts the pressure value into an electrical signal to feed back to the computer control system 5. 9. The opening and closing of the air outlet valve 10 controls the air in and out of the airbag unit 3, so that the airbag unit 3 in different matrix positions can meet the pressure support requirements of a single point in the matrix, so that the contact surface between the mattress 2 and the patient can be adjusted according to the patient's condition. A specific support surface needs to be present.

The specific control process is as follows:

Inflation process: According to the conditions of different patients and their disease requirements, set the air pressure value in the airbag unit at a certain point (X, Y) in the airbag unit arranged in a matrix to be P, and the first pressure feeling at T1 at this time point The device detects that the pressure of the airbag unit is P1. If P1<P, the first pressure sensing device converts the pressure value P1 sensed in the airbag unit into an electrical signal and feeds it back to the computer control system. The set program sends instructions to the intake valve, controls the intake valve to open, and inflates the airbag unit. When the air pressure in the airbag unit reaches P, the intake valve closes, and the airbag unit stops inflating. This time point is T2. By controlling the air pressure P in the airbag unit, the airbag unit can be at different levels on the surface of the mattress.

Deflation process: According to the conditions of different patients and their disease requirements, set the air pressure value in the air bag unit at a certain point (X, Y) in the air bag unit arranged in a matrix to be P, and the first pressure of T1 at this time point The sensing device detects that the pressure of the airbag unit is P2. If P2>P, the first pressure sensing device converts the pressure value P2 sensed in the airbag unit into an electrical signal and feeds it back to the computer control system. The computer control system according to The pre-set program issues an instruction to give the air valve, controls the air outlet valve to close, and deflates the airbag unit. When the air pressure in the airbag unit reaches P, the air outlet valve closes, and the airbag unit stops deflation. This time point is T2. By controlling the air pressure P in the airbag unit, the airbag unit can be at different levels on the surface of the mattress.

Airbag unit matrix combination: Different airbag unit locations (X, Y), different pressure requirements (P) and different time points (t) are combined to form different patient contact surface modes. As shown in modes 1, 2, 3, and 4 in Figure 4, modes 1 and 2 indicate that the air mattress presses the contact surface of the patient at different time points t or prevents the occurrence of decubitus through different contact surfaces; When evacuating the treatment, the patient's bed sore will not be under pressure, so as to achieve the purpose of treatment; Mode 4 indicates that the best contact surface should be adjusted according to the patient's position and the size of the bed sore, so that the patient can receive proper support while lying in bed for a long time. The airbag unit matrix combination of the utility model can also set a variety of different treatment modes according to specific usage conditions. Each mode can be defined according to the patient's needs in terms of position, pressure and time point, so that the contact between the mattress and the patient The surface presents different contact surfaces at different times, and can perform peristaltic massage on specific parts of the patient through the up and down peristalsis of the airbag unit at a specific time (such as before going to bed at night), guide the patient to turn over regularly, and prevent the blood circulation caused by the patient's long-term bed rest It can increase the therapeutic effect of patients, prevent and treat bedsores, reduce the burden of medical care and save medical expenses.

The air pump system 4 includes an air pump 11, a high-pressure pipeline 12, a low-pressure pipeline 13, a second pressure sensing device 14, a third pressure sensing device 15, an end air valve 16, and the second pressure sensing device 14 and the third pressure sensing device. The induction device 15 is a barometer or a pressure sensor; the high-pressure pipeline 12 is a three-way pipe, one port is provided with a terminal air valve 16, and the other two ports are respectively connected with the air pump 11 and the air bag inlet 6; the low-pressure pipeline 13 It is a three-way pipe, one port is provided with a terminal air valve 16, one port is connected to the air bag outlet 7, and the other port is closed; the second pressure sensing device 14 is arranged in the high pressure pipeline 12, and the third pressure sensing device The device 15 is arranged in the low pressure pipeline 13, and the terminal air valves 16 are respectively arranged at the ends of the high and low pressure pipelines; the air pump 11, the second pressure sensing device 14, the third pressure sensing device 15 and the terminal air valve 16 pass through the Wire is connected with computer control system 5. The second pressure sensing device 14 senses the air pressure in the high-pressure pipeline 12 and converts it into a signal to feed back to the computer control system 5. The computer control system 5 issues instructions according to the set program, and controls the air pump 11 and the terminal air valve. The opening and closing of 16 controls the pressure in the high-pressure pipeline 12; the third pressure sensing device 15 senses the air pressure in the low-pressure pipeline 13 and converts it into an electrical signal to feed back to the computer control system 5, and the computer control system 5 The set program issues instructions to control the pressure in the low-pressure pipeline 13 by controlling the opening and closing of the terminal air valve 16; set requirements.

The specific control process is as follows:

If the air pressure sensed by the second pressure-sensing device in the high-pressure pipeline is lower than the air pressure value in the high-pressure pipeline set by the program, the second pressure-sensing device converts the sensed air pressure into an electrical signal and feeds it back to the computer control system , the computer control system sends instructions to the terminal air valve and air pump according to the preset program, and the terminal air valve is controlled to close, and the air pump pumps air to the high-pressure pipeline until the air pressure in the high-pressure pipeline reaches the preset pressure requirement; if the high-pressure pipeline The air pressure value sensed by the second pressure sensing device in the road is higher than the air pressure value in the high-pressure pipeline set by the program, and the second pressure sensing device converts the sensed air pressure value into an electrical signal and feeds it back to the computer control system. The system sends instructions to the terminal air valve and air pump according to the preset program, and controls the terminal air valve to open for deflation, and the air pump is closed until the air pressure in the high-pressure pipe reaches the preset pressure requirement.

If the air pressure sensed by the third pressure-sensing device in the low-pressure pipeline is higher than the air pressure value in the low-pressure pipeline set by the program, the third pressure-sensing device converts the sensed air pressure into an electrical signal and feeds it back to the computer control system , the computer control system sends instructions to the terminal air valve according to the preset program to control the opening of the terminal air valve so that the air pressure in the low-pressure pipeline reaches the preset pressure requirement; since the low-pressure pipeline is used to deflate the airbag unit, The air pressure in the low-pressure line needs to be lower than the air pressure in the airbag unit, so this step only needs the deflation process.

The computer control system can perform timing and constant pressure control on the air pressure in the airbag unit 3 at different matrix points according to the set program, and control the air pressure in the air pump system 4, so that the mattress 2 can be at a specific time point ( t) Present a specific support surface to meet the needs of patients for rehabilitation and prevention of decubitus according to the condition.

It should be noted that in this embodiment, the mattress is composed of a number of mutually independent airbag units arranged in a matrix, an air pump system, and a computer control system. The computer control system controls the air pressure in the airbag units at different matrix positions Size, so that the airbag unit presents a specific support surface on the contact surface with the patient. This design allows the airbag units at different matrix unit positions to be combined into different patient contact surface modes according to program settings. prevent the occurrence of bedsores; Mode 3 means to vacate the bedsore so that the patient’s bedsore will not be under pressure, so as to achieve the purpose of treatment; Mode 4 means to adjust the best contact surface according to the patient’s position and the size of the bedsore so that the patient Proper support while lying in bed for long periods of time. The airbag unit matrix combination of the utility model can also set a variety of different treatment modes according to specific usage conditions. Each mode can be defined according to the patient's needs in terms of position, pressure and time point, so that the contact between the mattress and the patient The surface presents different contact surfaces at different times, and can perform peristaltic massage on specific parts of the patient through the up and down peristalsis of the airbag unit at a specific time (such as before going to bed at night), guide the patient to turn over regularly, and prevent the blood circulation caused by the patient's long-term bed rest It can increase the therapeutic effect of patients, prevent and treat bedsores, reduce the burden of medical care and save medical expenses.

In this embodiment, the air pump system includes an air pump, a high-pressure pipeline, a low-pressure pipeline, a second pressure sensing device, a third pressure sensing device, and an end air valve. The air pump, the second pressure sensing device, and the third pressure sensing device The device and the terminal air valve are respectively connected to the computer control system through wires, and the computer control system issues instructions according to the set program to control the air pressure in the high and low pressure pipelines of the air pump system; this design can realize the control of the air pressure in the high and low pressure pipelines Precise control is carried out to make the air pressure in the pipeline meet the preset requirements of the program to ensure the smooth progress of the inflation and deflation process of the airbag unit.

In this embodiment, the contact surface between the airbag unit and the patient is a rectangle, and the area of the rectangle is 4-10cm ² , and the area of the rectangle is the optimal design area. If the area of the rectangle is too large, the support composed of the airbag unit If the fit between the surface and the patient is low, there will be a feeling of unevenness, making it uncomfortable to use; if the rectangular area is too small, the number of airbag units and air pump systems will be increased under the same area size, and the manufacturing cost of the air mattress will be increased. The limitation of the rectangular area ensures that the airbag unit can form the best contact surface suitable for the patient according to the needs, so that it can fit the patient's body parts, especially the bony protruding parts or bedsores accurately, so that the protruding parts are not under pressure, and the adjacent The position can be properly supported, which is conducive to the rehabilitation of patients who have been bedridden for a long time.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the premise of the utility model method, some improvements and supplements can also be made, and these improvements and supplements also It should be regarded as the protection scope of the present utility model.

Claims (6)

1. a novel air bed for rehabilitation and prevention and treatment of decubitus, comprising an air bed bed body (1), and a mattress (2) arranged on the air bed bed body and matched therewith, characterized in that the mattress ( 2) It is composed of several airbag units (3), air pump system (4) and computer control system (5) which are respectively independent and arranged in a matrix; the airbag unit (3) includes an airbag inlet (6), an airbag outlet (7), the first pressure sensing device (8), and the inlet valve (9) and the outlet valve (10) that are respectively arranged on the inlet and outlet of the airbag; the inlet of the airbag (6) is connected by a high-pressure pipeline (12) The air pump (11), the outlet of the air bag (7) are connected to the low-pressure pipeline (13), the inlet valve (9), the outlet valve (10) and the first pressure sensing device (8) are connected to the computer control system (5) through wires ; The first pressure sensing device (8) senses the pressure in the airbag unit (3) and converts it into a signal to feed back to the computer control system (5), and the computer control system (5) sends instructions according to the set program, through the control The opening and closing of the air inlet valve (9) and the air outlet valve (10) controls the inflow and outflow of the air valves, so that the airbag units (3) in different matrix positions can meet the pressure support requirements of a single point in the matrix, and the mattress (2) and The patient contact surface presents a specific support surface according to the needs of the disease; the air pump system (4) includes an air pump (11), a high-pressure pipeline (12), a low-pressure pipeline (13), a second pressure sensing device (14), a second Three pressure sensing devices (15), terminal air valve (16); the second pressure sensing device (14) is arranged in the high pressure pipeline (12), and the third pressure sensing device (15) is arranged in the low pressure pipeline (13), the terminal air valve (16) is arranged at the end of the high and low pressure pipeline, the air pump (11), the second pressure sensing device (14), the third pressure sensing device (15) and the terminal air valve (16) ) are respectively connected to the computer control system (5) through wires; the second pressure sensing device (14) senses the air pressure in the high-pressure pipeline (12) and converts it into a signal to feed back to the computer control system (5), and the computer The control system (5) issues instructions according to the set program, and controls the pressure in the high-pressure pipeline (12) by controlling the opening and closing of the air pump (11) and the terminal air valve (16); The air bag unit (3) and the air pump system (4) in each matrix are controlled by a predetermined program timing, fixed point, and constant pressure. 2. according to the described air bed of claim 1, it is characterized in that, described mattress (2) is by the air bag unit (3), air pump system (4) that is mutually independent and arranged in m * n respectively, and computer control system ( 5) Composition, the m is 2-10000, and the n is 2-10000. 3. The air mattress according to claim 1, characterized in that, the first pressure sensing device (8) is a pressure sensor or a barometer. 4. The air bed according to claim 1, characterized in that, the high-pressure pipeline (12) is a three-way pipe, one of the ports is provided with a terminal air valve (16), and the other two ports are respectively connected to the air pump (11) Connect with airbag inlet (6). 5. The air mattress according to claim 1, characterized in that, the low-pressure pipeline (13) is a three-way pipe, one port is provided with a terminal air valve (16), and one port is connected with the air bag outlet (7), Another port is closed. 6 . The air mattress according to claim 1 , characterized in that, the contact surface between the airbag unit ( 3 ) and the patient is a rectangle, and the area of the rectangle is 4-10 cm ² .