Facial pressure ulcer prevention device

Abstract

The present application relates to the technical field of medical devices, in particular to a face pressure sore prevention device. The device comprises a shell, a liquid storage frame, a monitoring mechanism and the like. A circular hole is formed on the top of the shell. The shell is provided with the liquid storage frame. The liquid storage frame is provided with the monitoring mechanism. The monitoring mechanism is used for monitoring the temperature of the liquid in the liquid storage frame. The monitoring mechanism, the heating pipe and the refrigeration pipe can be used to monitor the water temperature in the liquid storage frame in real time and automatically adjust the heating or refrigeration. The liquid in the input water bag can be maintained in a preset comfortable temperature range. The defects of the prior art that the temperature of the air bag is easily affected by the environment are overcome. The discomfort of the patient's face caused by the overcooling or overheating of the temperature is avoided. The constant warm support can significantly improve the comfort of the patient in the long time prone position treatment, promote the local blood circulation of the face, enhance the tissue tolerance, and further reduce the risk of pressure injury on the basis of dynamic decompression.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a facial pressure ulcer prevention device. Background Technology

[0002] In intensive care (ICU), postoperative recovery, or certain special treatments, patient positioning is crucial for treatment outcomes. For example, prone ventilation is often used to improve oxygenation in patients with acute respiratory distress syndrome (ARDS). Additionally, some patients undergoing craniocerebral surgery, back surgery, or severe burns require prolonged prone positioning. However, in this position, the patient's face is directly facing and in contact with the supporting surface. This prolonged mechanical pressure can easily lead to local soft tissue ischemia and hypoxia. If not relieved promptly, pressure injuries (pressure sores) can develop quickly, increasing patient suffering, prolonging recovery, and in severe cases, even causing skin necrosis and secondary infections.

[0003] To address the aforementioned issues, patent publication number CN219921469U discloses an "automatic pressure ulcer prevention prone headrest." This device, through the inclusion of first, second, and third pressure ulcer prevention airbags and a support unit, along with an air supply device, can automatically adjust the pressure distribution of the inner and outer airbags at regular intervals during surgery or treatment, ensuring that the patient's face sequentially contacts either the inner or outer airbag. However, despite the achievements of the aforementioned prior art in dynamic pressure reduction, the surface material of the airbags and the internal gas temperature are susceptible to environmental factors. When the ambient temperature is high or low, the surface temperature of the pressure ulcer airbag will change significantly. Since the airbag is in direct contact with the patient's facial skin for a long time, this heat conduction that fluctuates with the ambient temperature will directly affect the patient's sensitive facial skin. In a hot environment, the overheating of the airbag surface may cause the patient to sweat, feel stuffy and uncomfortable, and even increase the risk of skin maceration. In a cold environment, the cold touch will cause the patient to shiver and constrict blood vessels, which not only reduces the patient's comfort but may also interfere with the stability of the patient's vital signs and affect the smooth progress of treatment. Summary of the Invention

[0004] In view of this, the present invention provides a facial pressure ulcer prevention device that can solve the shortcomings of existing pressure ulcer prevention head frames that lack temperature regulation function and are easily affected by ambient temperature, causing the patient's face to become too hot or too cold, resulting in discomfort or even affecting vital signs.

[0005] The technical solution of the present invention is: a facial pressure ulcer prevention device, comprising a shell, a liquid storage frame, a monitoring mechanism, a heating tube, a cooling tube, a water bladder, an annular tube, a connecting tube, a solenoid valve, a water delivery mechanism, and a return mechanism. A circular hole is provided at the top of the shell. A liquid storage frame is disposed inside the shell, and a monitoring mechanism is disposed inside the liquid storage frame to monitor the temperature of the liquid within the storage frame. A heating tube and a cooling tube are disposed inside the liquid storage frame; the heating tube heats the liquid within the storage frame, and the cooling tube cools the liquid within the storage frame. Water bladders are installed at an annular interval around the edge of the circular hole in the shell. An annular tube is installed inside the shell, and a connecting tube connects the annular tube to the water bladders. A solenoid valve is installed on the connecting tube. A water delivery mechanism and a return mechanism are disposed inside the shell; the water delivery mechanism inputs the liquid from the storage frame into the annular tube, and the return mechanism returns the liquid from the annular tube back to the storage frame.

[0006] Furthermore, the monitoring mechanism includes a water temperature tester and a controller. The water temperature tester is installed inside the liquid storage container to monitor the liquid temperature inside the container, and the controller is installed on the side of the casing.

[0007] Furthermore, the water conveying mechanism includes a water pump, an inlet pipe, and an outlet pipe. The water pump is installed inside the housing, the inlet of the water pump is connected to the inlet pipe, the end of the inlet pipe is located inside the liquid storage frame, and the outlet of the water pump is connected to the outlet pipe.

[0008] Furthermore, the reflux mechanism includes an electromagnetic three-way valve and a reflux pipe. The electromagnetic three-way valve is installed on the annular pipe and has three connection ends. One connection end is connected to the outlet pipe, another connection end is connected to the annular pipe, and the remaining connection end is connected to the reflux pipe. The end of the reflux pipe is located inside the liquid storage frame.

[0009] Furthermore, it also includes a nebulization therapy mechanism, which includes a medicine container, a nebulizer, and an inlet tube. The medicine container is slidably arranged inside the housing, and the nebulizer is installed inside the housing. The inlet of the nebulizer is connected to the inlet tube, and the end of the inlet tube is located inside the medicine container.

[0010] Furthermore, it also includes a ventilation mechanism, which includes a ventilation plate and a fan. The ventilation plates are symmetrically arranged on the shell, and the fans are symmetrically arranged inside the shell.

[0011] Furthermore, it also includes a crash barrier, which is installed on the top of the housing to protect the patient's face.

[0012] Furthermore, it also includes friction pads, which are installed on the bottom of the housing to maintain the stability of the housing.

[0013] The beneficial effects of this invention are as follows: 1. By setting up a monitoring mechanism, heating pipe and cooling pipe, this invention can monitor the water temperature in the reservoir in real time and automatically adjust the heating or cooling to ensure that the liquid input into the water bag is maintained within the preset comfortable temperature range. This effectively overcomes the defect of the air bag temperature being easily affected by the environment in the prior art, and avoids discomfort to the patient's face caused by excessively cold or hot temperatures. Moreover, the constant temperature support not only significantly improves the patient's comfort during long-term prone treatment, but also helps to promote local blood circulation in the face and enhance tissue tolerance, thereby further reducing the risk of pressure injury on the basis of dynamic decompression.

[0014] 2. This invention uses a controller to control two sets of staggered water bladders to alternately inflate and deflate, achieving periodic switching of the patient's facial support points. This provides intermittent relief to the pressure points and avoids prolonged continuous pressure on the same area. At the same time, the reciprocating motion of the water bladders causes the patient's head to periodically rise and fall. This slight lifting and lowering motion not only further promotes facial blood circulation and prevents local tissue ischemia and necrosis, but also effectively avoids muscle stiffness and discomfort caused by maintaining a fixed posture for a long time, significantly improving the physiological benefits of treatment.

[0015] 3. This invention integrates multiple functions such as a nebulizer, a ventilation system, a shock absorber, and a friction pad. The nebulizer allows patients to receive respiratory medication while maintaining a prone position for pressure ulcer prevention treatment, eliminating the need for frequent changes in body position, thus improving treatment efficiency and reducing the risk of movement. The ventilation system can intelligently start and stop the fan according to the treatment status, ensuring both air circulation and medication concentration. The shock absorber and friction pad comprehensively enhance the safety and reliability of the prone treatment process from two dimensions: preventing accidental impact to the patient's face and ensuring the overall stability of the device. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a three-dimensional structural diagram of the controller, anti-collision plate, and friction pad of the present invention.

[0018] Figure 3 This is a three-dimensional structural diagram of the shell and the circular hole of the present invention.

[0019] Figure 4 This is a three-dimensional structural diagram of the water conveying mechanism and the return mechanism of the present invention.

[0020] Figure 5 This is a three-dimensional structural diagram of the water temperature tester, heating tube, and cooling tube of the present invention.

[0021] Figure 6This is a three-dimensional structural diagram of the annular pipe, connecting pipe, and solenoid valve of the present invention.

[0022] Figure 7 This is a three-dimensional structural diagram of the liquid container, atomizer, and inlet pipe of the present invention.

[0023] Figure 8 This is a three-dimensional structural diagram of the atomizer, air vent plate, and fan of the present invention.

[0024] Explanation of reference numerals in the attached drawings: 1. Shell, 2. Circular hole, 3. Liquid storage frame, 401. Water temperature tester, 402. Controller, 5. Heating tube, 6. Cooling tube, 7. Water bladder, 8. Circular tube, 9. Connecting tube, 10. Solenoid valve, 1101. Water pump, 1102. Inlet pipe, 1103. Outlet pipe, 1201. Solenoid three-way valve, 1202. Return pipe, 13. Medicine container, 14. Nebulizer, 15. Inlet pipe, 16. Ventilation plate, 17. Fan, 18. Anti-collision plate, 19. Friction pad. Detailed Implementation

[0025] The following description is only a preferred embodiment of the present invention and does not limit the scope of protection of the present invention.

[0026] Example: A facial pressure ulcer prevention device, see below Figures 1-6 As shown, the device includes a housing 1; it also includes a liquid storage frame 3, a monitoring mechanism, heating pipes 5, cooling pipes 6, a water bladder 7, an annular pipe 8, a connecting pipe 9, a solenoid valve 10, a water supply mechanism, and a return mechanism; a circular hole 2 is provided in the middle of the top of the housing 1; a liquid storage frame 3 is provided at the rear right side of the bottom of the housing 1; a monitoring mechanism is provided inside the liquid storage frame 3 to monitor the temperature of the water inside the liquid storage frame 3; two heating pipes 5 are provided at the front upper side of the liquid storage frame 3 to heat the water inside the liquid storage frame 3; two cooling pipes 6 are provided at the front upper side of the liquid storage frame 3, located in front of the heating pipes 5, and are used to cool the water inside the liquid storage frame 3. The water in the storage box 3 is cooled; water bladders 7 are installed at annular intervals along the edge of the circular hole 2 of the shell 1, dividing all the water bladders 7 into two parts, and the two parts of the water bladders 7 are arranged in annular staggered distribution; annular pipe 8 is installed on the upper rear side of the shell 1; a connecting pipe 9 connects the annular pipe 8 and the water bladders 7; a solenoid valve 10 is installed on the connecting pipe 9, dividing all the solenoid valves 10 into two parts, and the two parts of the solenoid valves 10 are arranged in annular staggered distribution; a water supply mechanism and a return mechanism are provided inside the shell 1. The water supply mechanism is used to input the water in the storage box 3 into the annular pipe 8, and the return mechanism returns the water in the annular pipe 8 back to the storage box 3.

[0027] See Figure 2 and Figure 5As shown, the monitoring mechanism includes a water temperature tester 401 and a controller 402; the water temperature tester 401 is installed on the bottom right rear side of the liquid storage frame 3, and the water temperature tester 401 is used to monitor the temperature of the water in the liquid storage frame 3; the controller 402 is installed on the rear side of the housing 1, and the water temperature tester 401, heating tube 5, cooling tube 6 and solenoid valve 10 are all electrically connected to the controller 402.

[0028] See Figure 4 and Figure 5 As shown, the water conveying mechanism includes a water pump 1101, an inlet pipe 1102, and an outlet pipe 1103. The water pump 1101 is installed on the rear right side inside the housing 1. The water pump 1101 is electrically connected to the controller 402 and is located above the liquid storage frame 3. The inlet of the water pump 1101 is connected to the inlet pipe 1102, and the lower end of the inlet pipe 1102 is inside the liquid storage frame 3 so that the water pump 1101 can draw water out of the liquid storage frame 3 through the inlet pipe 1102. The outlet of the water pump 1101 is connected to the outlet pipe 1103.

[0029] See Figures 4-6 As shown, the reflux mechanism includes a solenoid three-way valve 1201 and a reflux pipe 1202; the bottom of the annular pipe 8 is provided with a solenoid three-way valve 1201, which is electrically connected to the controller 402. The solenoid three-way valve 1201 has three connection ends, which are distributed on the upper side, the right side and the lower side. The right connection end is connected to the water outlet pipe 1103, the upper connection end is connected to the annular pipe 8, and the lower connection end is connected to the reflux pipe 1202. The lower end of the reflux pipe 1202 is located in the liquid storage frame 3 to ensure that the water in the reflux pipe 1202 can accurately fall into the liquid storage frame 3.

[0030] Initially, solenoid valve 10 is in the closed state; When using it, first add an appropriate amount of water into the reservoir 3, then place the shell 1 on the designated position on the bed, then have the patient lie face down and place their face on top of the water bag 7, so that the patient's nose is aligned with the round hole 2, so that the patient can breathe normally through the round hole 2. Next, the pressure ulcer prevention program and temperature control program are activated via controller 402: After the pressure ulcer prevention program is activated, the controller 402 will control the opening of the solenoid valve 10 in the first part. Simultaneously, the controller 402 will control the solenoid three-way valve 1201 to create a passage between the annular pipe 8 and the outlet pipe 1103. Subsequently, the controller 402 will control the water pump 1101 to start, causing the pump to draw water from the storage box 3 through the inlet pipe 1102. This allows water to flow along the outlet pipe 1103 and the solenoid three-way valve 1201 into the annular pipe 8. The water in the annular pipe 8 then flows through the corresponding connecting pipe 9 into the water bladder 7 in the first part, causing the water bladder 7 to inflate and utilize the first part... The water bladder 7 supports the patient's face and lifts the patient's head. Once the water bladder 7 has fully inflated, the controller 402 shuts off the water pump 1101 and the solenoid valve 10 of the first part, and also controls the solenoid three-way valve 1201 to disconnect the passage between the annular pipe 8 and the outlet pipe 1103. After a period of time, the controller 402 opens the solenoid valve 10 of the first part, and simultaneously controls the solenoid three-way valve 1201 to create a passage between the annular pipe 8 and the return pipe 1202, allowing the water in the first water bladder 7 to flow through under the influence of gravity. The corresponding connecting pipe 9 enters the annular pipe 8, allowing the water in the annular pipe 8 to flow back to the reservoir 3 through the solenoid three-way valve 1201 and the return pipe 1202. During this process, the first part of the water bladder 7 gradually contracts and resets, lowering the patient's head. After the first part of the water bladder 7 has finished contracting, the controller 402 controls the solenoid valve 10 of the first part to close. At the same time, the controller 402 controls the solenoid three-way valve 1201 to disconnect the passage between the annular pipe 8 and the return pipe 1202. Then, the controller 402 controls the solenoid valve 10 of the second part to open, and at the same time, the controller 402 controls the solenoid three-way valve 1201 to open. 1. A passage is formed between the annular pipe 8 and the outlet pipe 1103. Then, the controller 402 controls the water pump 1101 to start, thereby sending the water in the storage box 3 into the second water bladder 7, so that the second water bladder 7 expands, thereby supporting the patient's face and lifting the patient's head. After the second water bladder 7 has expanded, the controller 402 controls the water pump 1101 to turn off, and at the same time controls the solenoid valve 10 of the second part to close, and controls the solenoid three-way valve 1201 to disconnect the passage between the annular pipe 8 and the outlet pipe 1103.After a period of time, the controller 402 will control the solenoid valve 10 of the second part to open. At the same time, the controller 402 will control the solenoid three-way valve 1201 to form a passage between the annular pipe 8 and the return pipe 1202, so that the water in the second part of the water bladder 7 will flow back into the reservoir 3. During this period, the second part of the water bladder 7 will gradually contract and reset, and lower the patient's head. This process is repeated, and the controller 402 can control the two parts of the water bladder 7 to alternately inflate and deflate, thereby periodically changing the contact support point between the patient's face and the device, so that the pressure on the face is intermittently relieved, avoiding the same area from bearing continuous pressure for a long time, and thus effectively preventing the formation of pressure sores. At the same time, the reciprocating process can also make the water bladder 7 periodically lift and lower the patient's head, so that the patient's head performs periodic up and down movements. This can not only further promote the blood circulation of the patient's face and prevent local tissue ischemia and necrosis due to long-term pressure, but also effectively avoid muscle stiffness and discomfort caused by the patient maintaining the same fixed posture for a long time. After the temperature control program starts, the controller 402 will control the water temperature tester 401 to turn on, so that the water temperature tester 401 continuously monitors the temperature of the water in the storage container 3. When the water temperature in the storage container 3 is lower than the preset lower limit, the water temperature tester 401 will send a signal. After receiving the signal, the controller 402 will control the heating tube 5 to turn on, so that the heating tube 5 heats the water in the storage container 3. This continues until the water temperature tester 401 detects that the water temperature in the storage container 3 is higher than the preset lower limit. Then, the water temperature tester 401 will send a signal, and after receiving the signal, the controller 402 will control the heating tube 5 to turn off. When the water temperature in the storage container 3 is higher than the preset upper limit, the water temperature tester 401 will send a signal, and after receiving the signal, the controller 402 will control the cooling tube 6 to turn on, so that the cooling tube 6 heats the water in the storage container 3. The water in the reservoir 3 is cooled until the water temperature tester 401 detects that the water temperature in the reservoir 3 is lower than the upper limit of the preset value. The water temperature tester 401 will send a signal, and the controller 402 will control the cooling pipe 6 to close after receiving the signal. In this way, the water temperature in the reservoir 3 can always be maintained within the preset comfortable temperature range. When the water is pumped into the water bag 7 and comes into contact with the patient's face, it can avoid the patient's facial blood vessels from constricting, chills or discomfort caused by excessively cold water, and also prevent the patient from sweating, skin maceration or burns caused by excessively hot water. This constant temperature support not only significantly improves the patient's comfort during long-term prone treatment, but also helps to promote local blood circulation in the face and enhance tissue tolerance, thereby further reducing the risk of pressure injury on the basis of dynamic decompression. After the patient is relieved of the prone position and the face is moved from the top of the water bladder 7, the anti-pressure ulcer program and the temperature control program are turned off by the controller 402. After the anti-pressure ulcer program is turned off, the water bladder 7 is fully contracted and reset, and all the water in the water bladder 7 flows back into the reservoir 3. After the temperature control program is turned off, the controller 402 will control the water temperature tester 401 to turn off.

[0031] See Figure 7 and Figure 8 As shown, it also includes a nebulizer, which includes a medicine container 13, a nebulizer 14, and an inlet tube 15. The medicine container 13 is slidably installed on the rear left side of the bottom of the housing 1. A handle is provided on the left side of the medicine container 13, which makes it easy for the operator to pull the medicine container 13 out to the left. The nebulizer 14 is installed in the middle of the lower side of the housing 1. The nebulizer 14 is electrically connected to the controller 402 and is located directly below the circular hole 2. The inlet of the nebulizer 14 is connected to the inlet tube 15. The inlet tube 15 is a flexible tube to ensure that the inlet tube 15 does not affect the pulling and moving of the medicine container 13. The lower end of the inlet tube 15 is inside the medicine container 13.

[0032] By setting up a nebulizer, when the patient is in a prone position and needs nebulized medication, the medication container 13 can be pulled out to the left, and an appropriate amount of medication can be added into the medication container 13. Then, the medication container 13 can be pushed back to the right, and the nebulizer 14 can be activated by the controller 402. The nebulizer 14 will then draw in the medication from the medication container 13 through the inlet tube 15 and perform nebulization. The generated medication mist can be directly applied to the patient's respiratory tract through the round hole 2 on the housing 1. This not only allows for simultaneous nebulized medication administration while the patient is in a prone position for pressure ulcer treatment, but also eliminates the need to frequently change the patient's position or interrupt the pressure ulcer treatment procedure. This improves treatment efficiency, reduces discomfort and risks caused by patient movement, and achieves synergistic effects of facial decompression and respiratory treatment.

[0033] See Figure 7 and Figure 8 As shown, it also includes a ventilation mechanism, which includes a ventilation plate 16 and a fan 17; two ventilation plates 16 are symmetrically arranged on the left and right sides of the housing 1; four fans 17 are symmetrically arranged on the left and right sides of the inner side of the housing 1, and the fans 17 are electrically connected to the controller 402.

[0034] By incorporating a ventilation mechanism, when the patient is not receiving nebulization treatment, the controller 402 can activate the fan 17 to efficiently draw fresh external air into the housing 1 through the ventilation plate 16, forming a good air convection circulation. This effectively improves the microenvironment around the patient's mouth and nose, ensuring smooth and comfortable breathing. When the patient is receiving nebulization treatment, the controller 402 controls the fan 17 to stop operating. This is intended to prevent airflow disturbances from causing the nebulized medication to be blown away or lost, ensuring that the medication mist can be concentrated and stably applied to the patient's respiratory tract, thereby guaranteeing the concentration and efficacy of the drug treatment.

[0035] See Figure 1 and Figure 2 As shown, it also includes a crash barrier 18; the crash barrier 18 is installed on the top of the housing 1 and is used to protect the patient's face.

[0036] By setting up the anti-collision plate 18, a buffer barrier can be provided for the patient's face when the patient is unconsciously agitated or adjusting their position. This can effectively prevent the patient's face from directly impacting the top of the shell 1, avoiding facial injury and significantly improving the safety and reliability of the prone position treatment process.

[0037] See Figure 1 and Figure 2 As shown, it also includes a friction pad 19; the friction pad 19 is installed at the bottom of the housing 1, and the friction pad 19 is used to maintain the stability of the housing 1.

[0038] By setting up friction pad 19, the static friction between the device and the bed surface is increased by utilizing its high coefficient of friction. When the water bag 7 periodically inflates and deflates, causing the patient's head to move up and down, the friction pad 19 can effectively counteract the resulting horizontal force and vibration, preventing the shell 1 from sliding, shifting, or tipping over. This ensures that the device always stays in the preset correct position, guaranteeing both the continuity and accuracy of treatment, and avoiding patient discomfort or safety hazards caused by device displacement.

[0039] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present application. Therefore, the content of this specification should not be construed as a limitation of the present application.

Claims

1. A facial pressure ulcer prevention device, comprising a housing (1), characterized in that, It also includes a liquid storage frame (3), a monitoring mechanism, a heating pipe (5), a cooling pipe (6), a water bladder (7), a ring pipe (8), a connecting pipe (9), a solenoid valve (10), a water supply mechanism, and a return mechanism. A round hole (2) is opened at the top of the housing (1). A liquid storage frame (3) is installed inside the housing (1). A monitoring mechanism is installed inside the liquid storage frame (3) to monitor the liquid temperature inside the liquid storage frame (3). A heating pipe (5) and a cooling pipe (6) are installed inside the liquid storage frame (3). The heating pipe (5) is used to heat the liquid inside the liquid storage frame (3). The cooling pipe (6) is used to cool the liquid in the storage box (3). Water bags (7) are installed at annular intervals on the edge of the round hole (2) of the shell (1). An annular pipe (8) is installed inside the shell (1). A connecting pipe (9) connects the annular pipe (8) and the water bag (7). A solenoid valve (10) is installed on the connecting pipe (9). A water supply mechanism and a return mechanism are provided inside the shell (1). The water supply mechanism is used to input the liquid in the storage box (3) into the annular pipe (8). The return mechanism returns the liquid in the annular pipe (8) back to the storage box (3).

2. The facial pressure ulcer prevention device according to claim 1, characterized in that, The monitoring mechanism includes a water temperature tester (401) and a controller (402). The water temperature tester (401) is installed inside the liquid storage box (3). The water temperature tester (401) is used to monitor the liquid temperature inside the liquid storage box (3). The controller (402) is installed on the side of the housing (1).

3. The facial pressure ulcer prevention device according to claim 1, characterized in that, The water conveying mechanism includes a water pump (1101), an inlet pipe (1102), and an outlet pipe (1103). The water pump (1101) is installed inside the housing (1). The inlet of the water pump (1101) is connected to the inlet pipe (1102). The end of the inlet pipe (1102) is located inside the liquid storage frame (3). The outlet of the water pump (1101) is connected to the outlet pipe (1103).

4. A facial pressure ulcer prevention device according to claim 3, characterized in that, The reflux mechanism includes an electromagnetic three-way valve (1201) and a reflux pipe (1202). The electromagnetic three-way valve (1201) is installed on the annular pipe (8). The electromagnetic three-way valve (1201) has three connection ends. One connection end is connected to the outlet pipe (1103), another connection end is connected to the annular pipe (8), and the remaining connection end is connected to the reflux pipe (1202). The end of the reflux pipe (1202) is located in the liquid storage frame (3).

5. A facial pressure ulcer prevention device according to claim 1, characterized in that, It also includes a nebulization therapy mechanism, which includes a medicine container (13), a nebulizer (14) and an inlet pipe (15). The medicine container (13) is slidably arranged inside the housing (1), and the nebulizer (14) is installed inside the housing (1). The inlet of the nebulizer (14) is connected to the inlet pipe (15), and the end of the inlet pipe (15) is inside the medicine container (13).

6. A facial pressure ulcer prevention device according to claim 1, characterized in that, It also includes a ventilation mechanism, which includes a ventilation plate (16) and a fan (17). The ventilation plate (16) is symmetrically arranged on the housing (1), and the fan (17) is symmetrically arranged inside the housing (1).

7. A facial pressure ulcer prevention device according to claim 1, characterized in that, It also includes a crash plate (18), which is installed on the top of the housing (1) and is used to protect the patient's face.

8. A facial pressure ulcer prevention device according to claim 1, characterized in that, It also includes a friction pad (19), which is installed on the bottom of the housing (1) and is used to keep the housing (1) stable.

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