Pressure sensing type nursing pad for preventing pressure sores

Abstract

The invention discloses a pressure induction type pressure sore prevention nursing pad, and relates to the technical field of pressure sore nursing, the pressure induction type pressure sore prevention nursing pad comprises an inner pad and a driving box, a plurality of air bag parts are adhered to the surface of the inner pad, an outer pad is composed of the plurality of air bag parts, air cavities are formed in the air bag parts, air grooves are formed in the air bag parts and located above the air cavities, and the driving box is connected with the driving box. According to the pressure sensing type nursing pad for preventing pressure sores, by arranging the air outlet holes, the heat conduction pad and the air cavity, the multiple sets of air bag parts can be controlled to conduct intermittent bulging and contracting actions, so that the stress position of the body of a patient is replaced, and the situation that the same position of the patient is pressed for a long time, and consequently pressure sores are generated is prevented; cooling air is sprayed out through the air outlet holes at the pressed position of a patient, when the patient lies on the nursing pad, heat generated at the contact position of the body of the patient and the air bag part is subjected to heat exchange and dissipation through circulating cooling liquid in the heat conduction pad, and the comfort of the patient is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pressure ulcer care, in particular to a pressure sensing type prevention of pressure ulcer care pad. BACKGROUND

[0002] Pressure ulcer, also known as pressure ulcer, bed sore, is due to local tissue long-term compression, resulting in persistent ischemia, hypoxia, malnutrition and tissue ulceration and necrosis. Skin pressure ulcer is a common problem in rehabilitation treatment and nursing. According to relevant literature reports, about 60,000 people die of pressure ulcer complications every year. The existing prevention of pressure ulcer care pad is mainly air cushion and ordinary sponge pad. The two kinds of air cushion can play a soft support role for patients, although they have ventilation, but the part of the patient contacting the care pad will still press the patient's skin for a long time, so that the patient will have pressure ulcer. SUMMARY

[0003] In view of the deficiencies of the prior art, the present application provides a pressure sensing type prevention of pressure ulcer care pad, which solves the problems raised in the background art.

[0004] In order to achieve the above purpose, the present application realizes the following technical scheme: the pressure sensing type prevention of pressure ulcer care pad comprises an inner pad and a driving box, a plurality of air bag parts are arranged on the surface of the inner pad, and the outer pad is composed of a plurality of air bag parts, a gas cavity is arranged in each air bag part, a gas groove is arranged in each air bag part and above the gas cavity, a plurality of gas outlets are arranged on the surface of each air bag part, the gas outlets are in communication with the gas grooves, a heat conduction pad is arranged on the surface of each air bag part, one end of the gas outlet extends to the outside of the heat conduction pad through the heat conduction pad, a heat conduction cavity is arranged in the heat conduction pad and outside the gas outlet, and a plurality of detectors are arranged on the surface of the inner pad.

[0005] Optionally, a first pipeline is installed in the inner pad, a second pipeline is installed in the inner pad and below the first pipeline, a third pipeline is installed in the inner pad and below the second pipeline, a fourth pipeline is installed in the inner pad and below the third pipeline, two third hoses are installed on one side of the air bag part, a first threaded head is installed at one end of the third hose, a second hose is installed on one side of the inner pad and below the first threaded head, a first rotary joint is installed at one end of the second hose, a first threaded pipe is installed at one end of the first rotary joint, the first threaded pipe is threadedly sleeved on the outside of the first threaded head, one end of the two third hoses extends to the inside of the gas cavity, and one end of the two second hoses is connected with the first pipeline and the second pipeline through the electromagnetic valve respectively.

[0006] Optionally, one side of the air bag part is provided with a first hose, one end of the first hose is provided with a second threaded head, one side of the inner pad below the second threaded head is provided with a fourth hose, one end of the fourth hose is provided with a second rotary joint, one end of the second rotary joint is provided with a second threaded pipe, the second threaded pipe is threaded on the outside of the second threaded head, one end of the first hose extends to the inside of the air tank, and one end of the fourth hose is connected with the third pipeline through a control valve.

[0007] Optionally, one side of the heat conduction pad is provided with an eighth hose, the other side of the heat conduction pad is provided with a sixth hose, one end of the sixth hose is provided with a second switch valve, one end of the second switch valve is provided with a third threaded head, one side of the inner pad is provided with a fifth hose, one end of the fifth hose is provided with a third rotary joint, one end of the third rotary joint is provided with a first switch valve, one end of the first switch valve is provided with a third threaded pipe, the third threaded pipe is threaded on the outside of the third threaded head, one end of the sixth hose extends to the inside of the air tank, and one end of the fifth hose is connected with one end of the fourth pipeline.

[0008] Optionally, one side of the driving box is fixedly connected with a first air pump, the driving box is provided with a cold liquid tank, one side of the cold liquid tank is fixedly connected with a first liquid pump, one end of the first liquid pump extends to the inside of the cold liquid tank, one side of the cold liquid tank is fixedly connected with a second air pump, one end of the first liquid pump extends to the inside of the cold liquid tank, the driving box is provided with a second liquid pump, one end of the second liquid pump extends to the inside of the cold liquid tank, the other end of the second liquid pump is connected with one end of the fourth pipeline through an elastic pipe, one end of the second air pump is connected with one end of the second pipeline through an elastic pipe, one end of the first air pump is connected with one end of the first pipeline through an elastic pipe, one end of the first liquid pump is provided with a seventh hose, one end of the seventh hose is provided with a fourth rotary joint, one end of the fourth rotary joint is provided with a third switch valve, one end of the third switch valve is provided with a fourth threaded pipe, one end of the eighth hose is provided with a fourth switch valve, one end of the fourth switch valve is provided with a fourth threaded head, and the fourth threaded pipe is threaded on the outside of the fourth threaded head.

[0009] Optionally, a contact cavity is installed inside the drive box, and a third air pump is provided inside the drive box and located on one side of the contact cavity. A liquid-absorbing sponge is installed inside the third air pump, and several moisture-absorbing plates are installed inside the third air pump and located on one side of the liquid-absorbing sponge. A liquid storage tank is provided inside the drive box and located below the third air pump. A liquid-absorbing cotton swab is inserted inside the liquid-absorbing sponge, and the bottom end of the liquid-absorbing cotton swab extends into the liquid storage tank. A liquid inlet is fixedly connected to one side of the drive box, and one end of the liquid inlet extends into the liquid storage tank. One end of the third pipe is connected to the inside of the third air pump through an elastic tube.

[0010] Optionally, one end of both the first and second liquid pumps extends into the interior of the cold liquid tank.

[0011] Optionally, a cooling fin is provided on one side of the cold liquid tank.

[0012] This invention provides a pressure-sensitive pressure ulcer prevention pad, which has the following beneficial effects:

[0013] 1. This pressure-sensitive pressure ulcer prevention pad features air vents, a heat-conducting pad, and an air chamber. It allows for the intermittent inflation and deflation of multiple air bladders, altering the pressure points on the patient's body and preventing prolonged pressure on the same area, which can lead to pressure ulcers. When the air bladders deflate, cool air is released through the air vents onto the pressure points. When the patient lies on the pad, the circulating cooling liquid inside the heat-conducting pad dissipates heat generated at the point of contact between the patient's body and the air bladders, ensuring patient comfort.

[0014] 2. This pressure-sensitive pressure ulcer prevention pad, by having several air bladders, a first threaded tube, and a second threaded tube, allows only one air bladder to be replaced when it is damaged, while the other parts can continue to be used without interfering with other air bladders. Damaged air vents can be replaced, and the remaining parts can still be used. Compared with existing one-piece structure pads, this reduces the cost of use. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the internal structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the left end of the inner pad of the present invention;

[0017] Figure 3 This is a schematic diagram of the right end of the inner pad of the present invention;

[0018] Figure 4 This is a schematic diagram of the outer structure of the inner pad of the present invention;

[0019] Figure 5This is a schematic diagram of the internal structure of the left end portion of the inner pad of the present invention;

[0020] Figure 6 This is a schematic diagram of the internal structure of the drive box of the present invention;

[0021] Figure 7 This is a schematic diagram of the outer structure of the drive box of the present invention;

[0022] Figure 8 For the present invention Figure 5 Enlarged view of point A;

[0023] Figure 9 For the present invention Figure 2 Enlarged view of point B;

[0024] Figure 10 For the present invention Figure 2 Enlarged view of point C;

[0025] Figure 11 For the present invention Figure 3 Enlarged view of point D;

[0026] Figure 12 For the present invention Figure 6 Enlarged view of point E.

[0027] In the diagram: 1. Inner pad; 2. Airbag section; 3. Detector; 4. Air chamber; 5. First hose; 6. Air groove; 7. Air outlet; 8. Thermal pad; 9. Thermal chamber; 10. First pipe; 11. Second pipe; 12. Second hose; 13. Third hose; 14. First threaded head; 16. First threaded tube; 17. First rotary joint; 18. Second threaded head; 20. Second threaded tube; 21. Second rotary joint; 22. Fourth hose; 23. Third pipe; 24. Fourth pipe; 25. Fifth hose; 26. Third rotary joint; 27. First switch valve; 28. 29. Three-threaded tube; 30. Third threaded head; 31. Second switch valve; 32. Sixth hose; 33. Drive box; 34. Seventh hose; 35. Fourth rotary joint; 36. Third switch valve; 37. Fourth threaded tube; 38. Fourth threaded head; 39. Eighth hose; 40. First air pump; 41. Second air pump; 42. First liquid pump; 43. Cold liquid tank; 44. Second liquid pump; 45. Third air pump; 46. Liquid-absorbing sponge; 47. Moisture-absorbing plate; 48. Liquid storage tank; 49. Liquid-absorbing cotton swab; 50. Liquid inlet hopper; 51. Cooling chip; 52. Contact cavity. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0029] Example 1

[0030] Please see Figures 1 to 12 This invention provides a technical solution: a pressure-sensitive pressure ulcer prevention pad, comprising an inner pad 1 and a drive box 32. The surface of the inner pad 1 is provided with a plurality of air bladders 2, and the outer pad is composed of the plurality of air bladders 2. Each air bladder 2 has an air cavity 4 inside, and an air groove 6 is provided inside the air bladder 2 and above the air cavity 4. Each surface of the air bladder 2 has a plurality of air outlets 7, which are connected to the interior of the air grooves 6. Each surface of the plurality of air bladders 2 is provided with a heat-conducting pad 8. One end of each air outlet 7 passes through the heat-conducting pad 8 and extends to the outside of the heat-conducting pad 8. Each heat-conducting pad 8 has a heat-conducting cavity 9 inside the heat-conducting pad 8 and outside the air outlet 7. The surface of the inner pad 1 is provided with a plurality of detectors 3.

[0031] The inner pad 1 has a first pipe 10 installed inside, a second pipe 11 installed inside the inner pad 1 and below the first pipe 10, a third pipe 23 installed inside the inner pad 1 and below the second pipe 11, and a fourth pipe 24 installed inside the inner pad 1 and below the third pipe 23. Two third hoses 13 are installed on one side of the airbag part 2. One end of each third hose 13 is fitted with a first threaded head 14. A second hose 12 is installed on one side of the inner pad 1 and below the first threaded head 14. One end of each second hose 12 is fitted with a first rotary joint 17. One end of each first rotary joint 17 is fitted with a first threaded tube 16. The first threaded tube 16 is threaded onto the outside of the first threaded head 14. One end of each of the two third hoses 13 extends into the air chamber 4. One end of each of the two second hoses 12 is connected to the first pipe 10 and the second pipe 11 respectively through a solenoid valve. The solenoid valve controls the air chamber 4 to communicate with the inside of the first pipe 10 or the second pipe 11.

[0032] The airbag 2 has a first hose 5 installed on one side, and a second threaded head 18 installed at one end of each first hose 5. The inner pad 1 has a fourth hose 22 installed on one side below the second threaded head 18. A second rotary joint 21 is installed at one end of each fourth hose 22. A second threaded tube 20 is provided at one end of each second rotary joint 21. The second threaded tube 20 is threaded on the outside of the second threaded head 18. One end of each first hose 5 extends into the air groove 6. One end of each fourth hose 22 is connected to the third pipe 23 through a control valve. The control valve controls the communication between the air groove 6 and the interior of the third pipe 23.

[0033] Among them, an eighth hose 39 is installed on one side of the heat-conducting pad 8, and a sixth hose 31 is installed on the other side of the heat-conducting pad 8. A second switch valve 30 is installed at one end of each sixth hose 31, and a third threaded head 29 is installed at one end of each second switch valve 30. A fifth hose 25 is installed on one side of the inner pad 1. A third rotary joint 26 is installed at one end of the fifth hose 25, and a first switch valve 27 is installed at one end of the third rotary joint 26. A third threaded tube 28 is installed at one end of the first switch valve 27. The third threaded tube 28 is threaded around the outside of the third threaded head 29. One end of the sixth hose 31 extends into the air groove 6. One end of the fifth hose 25 is connected to one end of the fourth pipe 24 so that the sixth hose 31 and the fifth hose 25 can be connected.

[0034] The drive housing 32 has a first air pump 40 fixedly connected to one side, a coolant tank 43 installed inside the drive housing 32, a first liquid pump 42 fixedly connected to one side of the coolant tank 43, one end of the first liquid pump 42 extending into the coolant tank 43, a second air pump 41 fixedly connected to one side of the coolant tank 43, one end of the first liquid pump 42 extending into the coolant tank 43, a second liquid pump 44 installed inside the drive housing 32, one end of the second liquid pump 44 extending into the coolant tank 43, and the other end of the second liquid pump 44 connected to one end of the fourth pipe 24 via an elastic tube. One end of the second air pump 41 is connected to the second... One end of pipe 11 is connected to the first air pump 40, and one end of the first air pump 40 is connected to one end of the first pipe 10 through an elastic tube. One end of the first liquid pump 42 is equipped with a seventh hose 33. One end of the seventh hose 33 is equipped with a fourth rotary joint 34. One end of the fourth rotary joint 34 is equipped with a third switch valve 35. One end of the third switch valve 35 is equipped with a fourth threaded tube 36. One end of the eighth hose 39 is equipped with a fourth switch valve 38. One end of the fourth switch valve 38 is equipped with a fourth threaded head 37. The fourth threaded tube 36 is threaded onto the outside of the fourth threaded head 37 so that the eighth hose 39 can be connected to the seventh hose 33.

[0035] One end of the first liquid pump 42 and the second liquid pump 44 extends into the cold liquid tank 43 so that the first liquid pump 42 and the second liquid pump 44 can circulate and cool the liquid inside the heat conduction cavity 9 to prevent the temperature of the contact area between the patient's body and the surface of the airbag 2 from overheating.

[0036] A cooling chip 51 is provided on one side of the cold liquid tank 43, which can cool the liquid inside the cold liquid tank 43.

[0037] Example 2

[0038] Please see Figure 1 , Figure 2 , Figure 6 and Figure 7The present invention provides a technical solution: a contact cavity 52 is installed inside the drive box 32; a third air pump 45 is provided inside the drive box 32 and on one side of the contact cavity 52; a liquid-absorbing sponge 46 is installed inside the third air pump 45; several moisture-absorbing plates 47 are installed inside the third air pump 45 and on one side of the liquid-absorbing sponge 46; a liquid storage tank 48 is provided inside the drive box 32 and below the third air pump 45; liquid-absorbing cotton swabs 49 are inserted inside the liquid-absorbing sponge 46, and the bottom end of the liquid-absorbing cotton swabs 49 extends into the liquid storage tank 48; and a liquid inlet 5 is fixedly connected to one side of the drive box 32. 0. One end of the inlet hopper 50 extends into the reservoir 48. One end of the third pipe 23 is connected to the inside of the third air pump 45 through an elastic tube. Cooling liquid such as menthol liquid can be placed inside the reservoir 48. It is sucked into the absorbent sponge 46 through the absorbent cotton swab 49. When the air discharged into the contact chamber 52 by the third air pump 45 passes through the absorbent sponge 46, it carries some liquid. The excess moisture is absorbed by the moisture-absorbing plate 47 and sprayed onto the part of the patient that contacts the air bag 2 through the air outlet 7, so that the patient feels cool. Other medications can also be added inside the reservoir 48.

[0039] In summary, when using this pressure-sensitive pressure ulcer prevention pad, the patient lies on the surface of the air bladder 2. The pressure applied above the air bladder 2 is detected by the detector 3. When an abnormal pressure is detected, medical staff are notified to provide care for the patient. Every so often, the solenoid valve on the air bladder 2 that needs to be contracted, connected to the second pipe 11, opens, and then the second air pump 41 starts. Through the second pipe 11, the solenoid valve, the first rotary joint 17, the first threaded pipe 16, the first threaded head 14, and the third hose 13, the gas inside the air chamber 4 is extracted and discharged, causing the air bladder 2 to contract. When the air bladder 2 that needs to be inflated, the solenoid valve on the air bladder 2 that is connected to the first pipe 10 opens, and then the first air pump 40 starts. Through the first pipe 10, the solenoid valve, the first rotary joint 17, the first threaded pipe 16, the first threaded head 14, and the third hose 13, the gas is introduced into the air chamber 4, causing the air bladder 2 to inflate. This alternating process provides support for the patient.

[0040] The coolant inside the cold liquid tank 43, cooled by the cooling plate 51, can be pumped through the fifth hose 25 into the third rotary joint 26, the first switch valve 27, the third threaded head 29, the second switch valve 30, and then into the sixth hose 31. It then enters the heat conduction chamber 9. The coolant inside the heat conduction chamber 9 is extracted and discharged into the cold liquid tank 43 through the first liquid pump 42, the seventh hose 33, the fourth rotary joint 34, the third switch valve 35, the fourth threaded head 37, the fourth switch valve 38, and the eighth hose 39 for cooling, to prevent the temperature at the contact point between the patient and the airbag 2 from becoming too high.

[0041] Air is drawn in by the third air pump 45 and then discharged into the contact chamber 52. The liquid medicine in the reservoir 48 is drawn into the absorbent sponge 46 by the absorbent cotton swab 49. After passing through the absorbent sponge 46, the air absorbs moisture through the moisture-absorbing plate 47 and then enters the third pipe 23 through the elastic tube. The control valve corresponding to the contraction airbag 2 is opened, and then the air enters the fourth hose 22, the second rotary joint 21, the second threaded head 18 and the first hose 5 through the third pipe 23. Then the air enters the air outlet 7 through the first hose 5 and is sprayed onto the body part of the patient that was in contact with the airbag 2 through the air outlet 7.

[0042] When it is necessary to replace the airbag part 2, close the second switch valve 30 and the third rotary joint 26, then unscrew the third threaded tube 28 from the outside of the third threaded head 29, peel the heat-conducting pad 8 from the surface of the airbag part 2, then unscrew the first threaded tube 16 from the outside of the first threaded head 14, then unscrew the second threaded tube 20 from the outside of the second threaded head 18, then peel the airbag part 2 from the surface of the inner pad 1, then stick the new airbag part 2 to the surface of the inner pad 1, then screw the first threaded tube 16 to the outside of the first threaded head 14, screw the second threaded tube 20 from the outside of the second threaded head 18, stick the heat-conducting pad 8 to the surface of the airbag part 2, then screw the third threaded tube 28 to the outside of the third threaded head 29, and then open the second switch valve 30 and the first switch valve 27.

[0043] When the thermal pad 8 needs to be replaced, close the second switch valve 30 and the first switch valve 27, unscrew the third threaded tube 28 from the outside of the third threaded head 29, then close the third switch valve 35 and the fourth switch valve 38, then unscrew the fourth threaded tube 36 from the outside of the fourth threaded head 37, peel the thermal pad 8 off from the outside of the airbag part 2, then stick the new thermal pad 8 to the outside of the airbag part 2, screw the fourth threaded tube 36 to the outside of the fourth threaded head 37, and open the third switch valve 35 and the fourth switch valve 38, screw the third threaded tube 28 to the outside of the third threaded head 29, then open the second switch valve 30 and the first switch valve 27. Coolant can be added to the inside of the coolant tank 43 through the inlet valve installed on the other side of the coolant tank 43.

[0044] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A pressure-sensitive pressure ulcer prevention pad, comprising an inner pad (1) and a drive housing (32), characterized in that: The inner pad (1) is provided with several air bladders (2) on its surface, and the outer pad is composed of several air bladders (2). Each air bladder (2) has an air cavity (4) inside it. Each air bladder (2) has an air groove (6) inside it and above the air cavity (4). Each air bladder (2) has several air outlets (7) on its surface. Each air outlet (7) communicates with the inside of the air groove (6). Each air bladder (2) has a heat-conducting pad (8) on its surface. One end of each air outlet (7) passes through the heat-conducting pad (8) and extends to the outside of the heat-conducting pad (8). Each heat-conducting pad (8) has a heat-conducting cavity (9) inside it and outside the air outlet (7). Each inner pad (1) has several detectors (3) on its surface.

2. The pressure-sensitive pressure ulcer prevention pad according to claim 1, characterized in that: The inner pad (1) has a first pipe (10) installed inside it. A second pipe (11) is installed inside the inner pad (1) and below the first pipe (10). A third pipe (23) is installed inside the inner pad (1) and below the second pipe (11). A fourth pipe (24) is installed inside the inner pad (1) and below the third pipe (23). Two third flexible tubes (13) are installed on one side of the airbag portion (2). One end of each third flexible tube (13) is fitted with a first threaded head (14). The inner pad (1) has… A second hose (12) is installed on one side and below the first threaded head (14). A first rotary joint (17) is installed at one end of each second hose (12). A first threaded tube (16) is installed at one end of each first rotary joint (17). The first threaded tube (16) is threaded onto the outside of the first threaded head (14). One end of each of the two third hoses (13) extends into the air chamber (4). One end of each of the two second hoses (12) is connected to the first pipe (10) and the second pipe (11) respectively through a solenoid valve.

3. The pressure-sensitive pressure ulcer prevention pad according to claim 2, characterized in that: A first hose (5) is installed on one side of each airbag part (2), and a second threaded head (18) is installed at one end of each first hose (5). A fourth hose (22) is installed on one side of each inner pad (1) and below the second threaded head (18). A second rotary joint (21) is installed at one end of each fourth hose (22). A second threaded tube (20) is provided at one end of each second rotary joint (21). The second threaded tube (20) is threaded on the outside of the second threaded head (18). One end of each first hose (5) extends into the air groove (6). One end of each fourth hose (22) is connected to a third pipe (23) through a control valve.

4. The pressure-sensitive pressure ulcer prevention pad according to claim 3, characterized in that: An eighth hose (39) is installed on one side of the heat-conducting pad (8), and a sixth hose (31) is installed on the other side of the heat-conducting pad (8). A second switch valve (30) is installed at one end of each of the sixth hoses (31), and a third threaded head (29) is installed at one end of each of the second switch valves (30). A fifth hose (25) is installed on one side of the inner pad (1). A third rotary joint (26) is installed at one end of the fifth hose (25), and a first switch valve (27) is installed at one end of the third rotary joint (26). A third threaded tube (28) is installed at one end of the first switch valve (27), and the third threaded tube (28) is threaded around the outside of the third threaded head (29). One end of the sixth hose (31) extends into the air groove (6), and one end of the fifth hose (25) is connected to one end of the fourth pipe (24).

5. The pressure-sensitive pressure ulcer prevention pad according to claim 4, characterized in that: A first air pump (40) is fixedly connected to one side of the drive box (32). A cold liquid tank (43) is installed inside the drive box (32). A first liquid pump (42) is fixedly connected to one side of the cold liquid tank (43). One end of the first liquid pump (42) extends into the cold liquid tank (43). A second air pump (41) is fixedly connected to one side of the cold liquid tank (43). One end of the first liquid pump (42) extends into the cold liquid tank (43). A second liquid pump (44) is installed inside the drive box (32). One end of the second liquid pump (44) extends into the cold liquid tank (43). The other end of the second liquid pump (44) is connected to one end of a fourth pipe (24) through an elastic tube. One end of the first air pump (40) is connected to one end of the second pipe (11) through an elastic tube. One end of the first air pump (40) is connected to one end of the first pipe (10) through an elastic tube. One end of the first liquid pump (42) is equipped with a seventh hose (33). One end of the seventh hose (33) is equipped with a fourth rotary joint (34). One end of the fourth rotary joint (34) is equipped with a third switch valve (35). One end of the third switch valve (35) is equipped with a fourth threaded tube (36). One end of the eighth hose (39) is equipped with a fourth switch valve (38). One end of the fourth switch valve (38) is equipped with a fourth threaded head (37). The fourth threaded tube (36) is threaded around the outside of the fourth threaded head (37).

6. The pressure-sensitive pressure ulcer prevention pad according to claim 5, characterized in that: The drive box (32) has a contact cavity (52) installed inside. A third air pump (45) is installed inside the drive box (32) and on one side of the contact cavity (52). A liquid-absorbing sponge (46) is installed inside the third air pump (45). Several moisture-absorbing plates (47) are installed inside the third air pump (45) and on one side of the liquid-absorbing sponge (46). A liquid storage tank (48) is installed inside the drive box (32) and below the third air pump (45). A liquid-absorbing cotton swab (49) is inserted inside the liquid-absorbing sponge (46). The bottom end of the liquid-absorbing cotton swab (49) extends into the liquid storage tank (48). A liquid inlet (50) is fixedly connected to one side of the drive box (32). One end of the liquid inlet (50) extends into the liquid storage tank (48). One end of the third pipe (23) is connected to the inside of the third air pump (45) through an elastic tube.

7. The pressure-sensitive pressure ulcer prevention pad according to claim 6, characterized in that: One end of both the first liquid pump (42) and the second liquid pump (44) extends into the interior of the cold liquid tank (43).

8. The pressure-sensitive pressure ulcer prevention pad according to claim 7, characterized in that: A cooling plate (51) is provided on one side of the cold liquid tank (43).

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