Face pressure sore prevention system and control method

Abstract

The invention discloses a face pressure sore prevention system and a control method, an air bag adjusting module comprises a plurality of air bag units and air pressure sensors, and the air pressure sensors are used for detecting air pressure in the air bag units and are in one-to-one correspondence with the air bag units; the temperature sensing module comprises temperature sensors located on the surfaces of the airbag units, and at least one temperature sensor is fixed to each airbag unit; the pressure sensing module comprises pressure sensors fixed on the surfaces of the air bag units, the air bag units are in one-to-one correspondence with temperature sensors, and the temperature sensors are pasted and fixed on the surfaces of the pressure sensors; and the main control module is used for processing the pressure and temperature signals, dynamically controlling the independent air bag units of the air bag adjusting module to be inflated and deflated in combination with the temperature and pressure data, and triggering the body prompting module to give out a prompt when the temperature is in a global abnormal state. By arranging the main control module, the temperature sensing module, the pressure sensing module, the air bag adjusting module and the prompting module, pressure sores can be prevented and monitored, and pressure sores on the face of a patient when the patient lies prone are avoided.

Description

Technical Field

[0001] This invention relates to patient care systems, and more specifically, to a facial pressure ulcer prevention system and control method. Background Technology

[0002] Some patients often need to maintain a prone position after surgery to ensure the recovery of the surgical site and avoid tissue pressure damage. Current prone devices only have simple physical support functions and lack pressure regulation and monitoring mechanisms, making it impossible to monitor for pressure sores. Therefore, there is an urgent need to improve them. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a facial pressure ulcer prevention system and control method. By setting up a main control module, a temperature sensing module, a pressure sensing module, an airbag adjustment module, and a prompting module, pressure ulcer prevention and monitoring can be achieved to avoid pressure ulcers on the face when the patient is lying face down.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a facial pressure ulcer prevention system, comprising a pillow body, a main control module, a temperature sensing module, a pressure sensing module, an airbag adjustment module, and a prompting module;

[0005] The pillow body includes a clearance opening that is adapted to the contours of the human mouth and nose.

[0006] The airbag adjustment module includes multiple airbag units and an air pressure sensor. The airbag units are fixed to the upper part of the pillow body. Multiple airbag units form an airbag area around the outer periphery of the clearance opening. The air pressure sensor is used to detect the air pressure inside the airbag unit and corresponds to each airbag unit.

[0007] The temperature sensing module includes a temperature sensor located on the surface of the airbag unit, and each airbag unit has at least one fixed temperature sensor.

[0008] The pressure sensing module includes a pressure sensor fixed on the surface of the airbag unit. The airbag unit corresponds one-to-one with a temperature sensor. The temperature sensor is pasted and fixed on the surface of the pressure sensor to form a sensor group.

[0009] The main control module is electrically connected to the temperature sensing module, pressure sensing module, airbag adjustment module, and prompting module. The main control module is used to process pressure and temperature signals, combine temperature and pressure data, dynamically control the inflation and deflation of the independent airbag units of the airbag adjustment module, and trigger the prompting module to issue a prompt when the temperature is abnormal across the entire range.

[0010] Furthermore, the airbag adjustment module also includes an air pump, an air intake valve, and a pressure relief valve. Each airbag unit is connected to an air intake valve and a pressure relief valve. The air pump is connected to each air intake valve to supply air to the airbag unit.

[0011] Furthermore, the prompting module includes an audible and visual alarm and a Bluetooth communication module. The audible and visual alarm is used to issue audible and visual prompts, and the Bluetooth communication module is used to upload data to a mobile terminal.

[0012] Furthermore, the pressure sensor is a thin-film pressure sensor, distributed on the surface of the airbag unit and surrounding the mouth and nose avoidance opening, with a detection range of 0.2-50 kPa and a sampling frequency of ≥10 Hz;

[0013] The temperature sensor is a patch-type temperature sensor with a detection range of 30-45℃, a sampling frequency of ≥10Hz, and an accuracy of ±0.1℃.

[0014] A method for controlling a facial pressure ulcer prevention system includes the following steps:

[0015] S1. The system starts and performs facial posture monitoring;

[0016] S2. Data acquisition and processing: Temperature sensors collect the face temperature at each airbag unit in real time.

[0017] Pressure sensors collect facial pressure data at each airbag unit in real time.

[0018] The data collected by the temperature and pressure sensors are fed back to the main control module for processing, and the main control module records the initial temperature data.

[0019] S3. Pressure sore detection: When the main control module receives a temperature reading from a temperature sensor that exceeds a set value, it determines the area as high-risk and marks it. , ...... ;

[0020] S4. Facial pressure adjustment: The main control module controls the airbag adjustment module to adjust the airbag pressure of the airbag unit located in the high-risk area and the airbag unit adjacent to it.

[0021] S5. After the airbag pressure is adjusted, if the main control module collects data from the temperature sensor located in the high-risk area and the temperature drops below the set value within 2 minutes, the high-risk area will be deactivated. ;

[0022] If the temperature does not drop within two minutes, proceed to step S3 to adjust the facial pressure.

[0023] S6. If the high-risk area is lifted, normal monitoring will continue.

[0024] Furthermore, after the system is started, each airbag unit in the airbag area inflates to the baseline pressure threshold, and the pressure sensor collects the pressure data within the airbag unit. Feedback is sent to the main control module;

[0025] Facial posture monitoring: After the airbag unit is compressed, the main control module determines whether the patient's facial posture remains stable based on the fluctuation of the air pressure sensor values ​​in each airbag unit.

[0026] If the fluctuation value is less than the set value for 5 consecutive seconds, the facial posture is considered stable, and step S2 is performed; if the fluctuation value exceeds the set value within 5 seconds, the calculation is recalculated after the fluctuation value is exceeded.

[0027] Furthermore, in step S2, the main control module needs to perform Kalman filtering on the data collected by the temperature sensor and pressure sensor to eliminate noise interference, and calculate the denoised pressure value. and temperature values .

[0028] Furthermore, in step S3, pressure ulcer assessment includes local temperature anomaly assessment and global temperature anomaly assessment.

[0029] Judgment of local temperature anomalies:

[0030] When the number of airbag units in a high-risk area is less than 50% of the total number of airbag units, it is judged as a local temperature anomaly.

[0031] Global temperature anomaly detection:

[0032] Set the threshold for the proportion of anomalies across the entire domain. When the number of airbag units marked as high-risk areas for pressure ulcers accounts for the proportion of the total number of airbag units. This was determined to be a global temperature anomaly.

[0033] When the temperature sensor detects that the temperature exceeds the temperature threshold If the temperature rises for more than 30 seconds, or the temperature rise exceeds the initial temperature by more than 2°C and lasts for more than 30 seconds, it is determined to be a high-risk area.

[0034] Furthermore, when the main control module determines that there is a local temperature anomaly, it proceeds normally to step S4;

[0035] When the main control module determines that the temperature across the entire range is abnormal, the main control module controls the prompting module, and the prompting module’s audible and visual alarm sounds a warning and pushes the abnormal information to the mobile terminal via the Bluetooth communication module.

[0036] If the temperature is abnormal across the entire range, and the risk is eliminated, the patient adjusts their position, and the system restarts facial posture monitoring; if the risk is not eliminated, the prone position is canceled, and the system is shut down.

[0037] Furthermore, it also includes methods for regulating the pressure of the airbag unit:

[0038] Pressure regulation methods include:

[0039] Numerical setting: Set the baseline pressure threshold Pressure equilibrium threshold Pressure ulcer high-risk area blood pressure reduction threshold Blood pressure reduction threshold There are five, namely , , , and ;

[0040] Normal adjustment: When the pressure difference between adjacent airbag units At that time, the main control module controls the airbag adjustment module to inflate and deflate until the pressure difference is reached. ;

[0041] High-risk zone adjustment: When a certain airbag unit is in a high-risk zone, the main control module controls the corresponding airbag unit's pressure relief valve to open until the corresponding airbag... Maintain this pressure value for 2 minutes;

[0042] If the temperature value collected by the temperature sensor at the airbag unit drops below the set value during the pressure holding period, the high-risk flag is removed; if the temperature value collected by the temperature sensor at the airbag unit is greater than or equal to the set value during the pressure holding period, the pressure of the corresponding airbag continues to be adjusted. Until the high-risk marker is removed; if the airbag unit lowers the pressure threshold for all high-risk pressure ulcer areas. If the high-risk marker is still not removed after all adjustments are made, the main control module will control the audible and visual alarm of the prompt module to issue a prompt and push the abnormal information to the mobile terminal via the Bluetooth communication module.

[0043] In summary, the present invention has the following beneficial effects:

[0044] The facial pressure ulcer prevention system in this embodiment, through modular design and closed-loop control logic, realizes posture monitoring, precise temperature and pressure acquisition, anticipatory prediction of pressure ulcer risk, and dynamic adjustment of airbag pressure during the face-prone lying process. It effectively solves the problem of traditional prone lying devices lacking a pressure ulcer monitoring mechanism, and can significantly reduce the incidence of facial pressure ulcers in prone lying patients, improving nursing safety and comfort. Attached Figure Description

[0045] Figure 1 This is a top view of the pillow body in this embodiment;

[0046] Figure 2 This is a partial cross-sectional view of the pillow body in this embodiment;

[0047] Figure 3 This is a schematic diagram of this embodiment;

[0048] Figure 4 This is the control flowchart for this embodiment.

[0049] Reference numerals: 1. Pillow body; 101. Clearance opening; 102. Notch; 103. First stop block; 104. Second stop block; 2. Airbag area; 3. Sensor group; 4. Protective membrane; 5. Main control module; 6. Temperature sensing module; 601. Temperature sensor; 7. Pressure sensing module; 701. Pressure sensor; 8. Airbag adjustment module; 801. Airbag unit; 802. Air pressure sensor; 803. Air pump; 804. Intake valve; 805. Pressure relief valve; 9. Indication module; 901. Audible and visual alarm; 902. Bluetooth communication module; 10. Power module; 11. Mobile terminal. Detailed Implementation

[0050] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] like Figures 1 to 4 As shown, this embodiment discloses a facial pressure ulcer prevention system, including a pillow body 1, a main control module 5, a temperature sensing module 6, a pressure sensing module 7, an airbag adjustment module 8, a prompting module 9, and a power supply module 10.

[0052] like Figure 1 As shown, the pillow body 1 is filled with supporting sponge. The pillow body 1 includes an avoidance opening 101, a notch 102, a first stop 103, and a second stop 104. The avoidance opening 101 is a ring-shaped structure that conforms to the contour of the human mouth and nose. The notch 102 is located at the bottom of the pillow body 1 and connects the avoidance opening 101 to the outside of the pillow body 1. The notch 101 can be used to avoid tubes such as suction tubes. There is one first stop 103, which can limit the top of the patient's head. There are two second stops 104, which are located on both sides of the avoidance opening 101 and are used to limit the sides of the patient's head. By setting the first stop 103 and the second stop 104, the patient's head can be limited, which is convenient for the patient to lie face down. Preferably, the first stop 103 and the second stop 104 are designed to be detachable and are fixed to the pillow body 1 by Velcro.

[0053] The power module 10 has a built-in lithium battery located inside the pillow body 1. It is equipped with a charging interface and is electrically connected to the main control module 5, temperature sensing module 6, pressure sensing module 7, airbag adjustment module 8, and prompting module 9 to provide stable power to the entire system.

[0054] The airbag adjustment module 8 is the system's execution module, including multiple airbag units 801, air pressure sensor 802, air pump 803, air intake valve 804, and pressure relief valve 805.

[0055] The airbag unit 801 is fixed to the upper part of the pillow body 1. Multiple airbag units 801 form a continuous airbag area 2 around the outer periphery of the avoidance opening 101. In this embodiment, there are 11 airbag units 801, which are distributed on the outside of the avoidance opening 101 to cover the main pressure areas of the patient's face such as the forehead, cheekbone, and jaw when the patient is lying face down. The airbag unit 801 is made of medical TPU material with a thickness of 0.4mm. It has the characteristics of anti-aging, leak-proof and good flexibility. The inflation pressure adjustment range of a single airbag unit 801 is 5-40kPa.

[0056] The air pressure sensor 802 is used to detect the air pressure inside the airbag unit 801. It is a miniature piezoresistive air pressure sensor, which corresponds one-to-one with the airbag unit 801. It is built into the inner wall of each airbag unit 801, with a detection accuracy of ±0.1kPa and a sampling frequency of ≥10Hz. It is used to detect the air pressure value inside the airbag unit 801 in real time and feed the data back to the main control module 5 to form the airbag pressure monitoring.

[0057] Both the intake valve 804 and the pressure relief valve 805 are miniature electromagnetic control valves, corresponding one-to-one with the airbag unit 801. Each airbag unit 801 has an intake valve 804 connected to its intake end and a pressure relief valve 805 connected to its pressure relief end.

[0058] The air pump 803 is a miniature diaphragm air pump, which is connected to the air intake valve 804 of each airbag unit 801 through the main air passage to provide inflation power for the airbag unit 801.

[0059] The main control module 5 controls the opening and closing of the air pump 803 and valves (inlet valve 804 and pressure relief valve 805) to achieve independent inflation and deflation of a single airbag unit 801, thereby adjusting the pressure on different areas of the patient's face when lying prone and preventing pressure sores.

[0060] The temperature sensing module 6 includes a temperature sensor 601 located on the surface of the airbag unit 801. Each airbag unit 801 has at least one temperature sensor 601 fixed to it. The pressure sensing module 7 includes a pressure sensor 701 fixed to the surface of the airbag unit 801. The temperature sensor 601 is pasted and fixed to the surface of the pressure sensor 701 to form a sensor group 3. A 0.2mm thick protective film 4 is attached to the outside of the sensor group 3. The temperature sensing module 6 and the pressure sensing module 7 realize the synchronous and accurate acquisition of facial temperature and pressure data. The airbag unit 801 corresponds one-to-one with the sensor group 3. In this embodiment, there are 11 sensor groups 3, which correspond to and match the airbag units 801.

[0061] The pressure sensor 701 is made of flexible thin-film piezoresistive material with a thickness of 0.1mm. It can conform to the surface deformation of the airbag unit 801, with a detection range of 0.2-50kPa, a sampling frequency of ≥10Hz, and a detection accuracy of ±0.2kPa. Its detection surface faces the patient's face and is used to collect the pressure value of the patient's face at the corresponding position of the airbag unit 801 in real time.

[0062] The temperature sensor 601 is a patch-type temperature sensor, a high-precision NTC thermistor with a detection range of 30-45℃, a sampling frequency of ≥10Hz, and a detection accuracy of ±0.1℃. It is directly attached to the surface of the pressure sensor 701 and separated from the patient's face only by a protective film 4. It can accurately collect the real-time temperature value of the facial skin, and the patch-type design avoids detection errors caused by the temperature sensor coming into contact with air.

[0063] The data collected by temperature sensor 601 and pressure sensor 701 are fed back to the main control module 5, processed by the main control module 5 and recorded in real time.

[0064] The prompting module 9 includes an audible and visual alarm 901 and a Bluetooth communication module 902. The audible and visual alarm 901 is used to issue audible and visual prompts, and the Bluetooth communication module 902 is used to upload data to the mobile terminal 11. The Bluetooth communication module 902 is integrated with the main control module 5 and is electrically connected to the main control module 5. The Bluetooth communication module 902 can upload the system's real-time temperature and pressure data, high-risk pressure ulcer zone markings, abnormal prompt information, etc., to the mobile terminal 11 (nurse station computer, medical staff's mobile phone / tablet) to realize remote abnormal prompts and improve nursing efficiency.

[0065] The main control module 5 uses an MCU controller and is electrically connected to the temperature sensing module 6, pressure sensing module 7, airbag adjustment module 8, and prompting module 9, respectively. The main control module 5 has built-in data processing algorithms, facial posture monitoring algorithms, pressure ulcer risk assessment algorithms, and airbag pressure adjustment algorithms, and can realize the following core functions:

[0066] ① Receive and process the data collected by temperature and pressure sensor 601 and air pressure sensor 701, and eliminate noise interference through Kalman filtering algorithm to obtain accurate and effective data;

[0067] ② Determine whether the patient's facial posture is stable based on the fluctuation of the air pressure sensor 802 in the airbag adjustment module 8;

[0068] ③ Combine the temperature data collected and processed by temperature sensor 601 to determine the high-risk area of ​​pressure ulcers and distinguish between local temperature abnormalities and global temperature abnormalities.

[0069] ④ Based on the pressure ulcer risk assessment results, send inflation / deflation commands to the airbag adjustment module 8 to achieve dynamic adjustment of airbag pressure;

[0070] ⑤ When the temperature across the entire region is abnormal, the alert module 9 is triggered to issue an abnormal alert and control the data upload.

[0071] A method for controlling a facial pressure ulcer prevention system includes the following steps:

[0072] S1. The system starts and performs facial posture monitoring;

[0073] System startup:

[0074] When the system power is turned on, power module 10 supplies power to all modules, and main control module 5 completes self-test; then main control module 5 controls air pump 803 to work, inflating each airbag unit 801 to the basic pressure threshold. The air pressure sensor 802 collects the air pressure values ​​of each airbag unit 801 in real time. The pressure is fed back to the main control module 5. Once the air pressure value of each airbag unit 801 is stable, the initial inflation preparation is completed.

[0075] Facial posture monitoring:

[0076] The patient lies face down on the pillow 1, and the head is positioned by the first stop 103 and the second stop 104. The face is in contact with the airbag area 2. Each airbag unit 801 deforms under the pressure of the face. The air pressure sensor 802 detects the air pressure fluctuation value of the airbag unit 801 in real time. Based on the fluctuation of the air pressure sensor 802 value in each airbag unit 801, the main control module 5 determines whether the patient's facial posture remains stable.

[0077] The main control module 5 activates the facial posture monitoring algorithm. The judgment criteria are: if the air pressure fluctuation value of each airbag unit 801 is less than ±1kPa within 5 consecutive seconds, the patient's facial posture is determined to be stable and the next data acquisition stage is entered; if the air pressure fluctuation value of any airbag unit 801 exceeds ±1kPa within 5 seconds, the facial posture is determined to be unstable, and the main control module 5 restarts the timing until the stability condition is met, so as to avoid temperature and pressure data acquisition errors caused by head shaking.

[0078] S2, Data Acquisition and Processing;

[0079] Temperature sensor 601 collects the facial temperature at each airbag unit 801 in real time; pressure sensor 701 collects the facial pressure at each airbag unit 801 in real time; the data collected by temperature sensor 601 and pressure sensor 701 are fed back to main control module 5 for processing. Main control module 5 performs Kalman filtering on the data collected by temperature sensor 601 and pressure sensor 701 to eliminate noise interference and calculates the denoised pressure value. and temperature values At the same time, the initial temperature data (i.e., the average temperature in the first 10 seconds after the posture stabilizes) is recorded as the benchmark value for subsequent pressure ulcer judgment.

[0080] The state equation for temperature Kalman filtering is: ;

[0081] The observation equation is: ;

[0082] The state equation for a pressure Kalman filter is: ;

[0083] The observation equation is: ;

[0084] in, The pressure state value at time k. Let A be the temperature state value at time k, A=1 be the state transition matrix, and B=0 be the control input matrix. To control the input, For pressure process noise (variance) ), Temperature process noise (variance) ), , These are the pressure and temperature sensor observations at time k, respectively, and H=1 represents the observation matrix. For pressure observation noise (variance) ), Temperature observation noise (variance) The denoised pressure value is obtained through iterative calculation. and temperature values .

[0085] S3. Assessment of pressure ulcers;

[0086] When the main control module 5 receives a temperature value from the temperature sensor 601 that exceeds the set value, it determines the area to be high-risk and marks it. , ...... ;

[0087] Specifically, the temperature sensor 601 corresponding to a single airbag unit 801 senses that the temperature exceeds the temperature threshold. If the duration is ≥30 seconds, or the temperature rises ≥2℃ from the initial temperature for ≥30 seconds, then the location corresponding to the airbag unit 801 is determined to be a high-risk area for pressure ulcers and is marked as such. If not satisfied, mark as .

[0088] After marking high-risk areas, the main control module 5 needs to perform local temperature anomaly judgment and global temperature anomaly judgment.

[0089] Judgment of local temperature anomalies:

[0090] When the number of airbag units 801 in the high-risk area is less than 50% of the total number of airbag units 801 (i.e., the number of airbag units 801 in the high-risk area is less than 6), it is judged as a local temperature abnormality. When the main control module 5 judges that the local temperature is abnormal, it proceeds normally to step S4 and enters the airbag pressure adjustment stage.

[0091] Global temperature anomaly detection:

[0092] Set the threshold for the proportion of anomalies across the entire domain. When the number of airbag units 801 marked as high-risk areas for pressure ulcers accounts for the proportion of the total number of airbag units 801. If there are ≥6 abnormal temperatures, it is determined that the temperature is abnormal across the entire range. When the main control module 5 determines that the temperature is abnormal across the entire range, the main control module 5 controls the prompting module 9. The sound and light alarm 901 of the prompting module 9 issues a prompt and pushes the abnormal information to the mobile terminal 11 through the Bluetooth communication module 902.

[0093] Furthermore, when the temperature is abnormal across the entire area, medical staff need to conduct a risk assessment based on the patient's actual condition. If the risk is eliminated after the assessment, the system will restart from the facial posture monitoring stage after the patient adjusts their position. If the risk is not eliminated, medical staff will instruct the patient to stop lying prone, shut down the system, and avoid facial pressure sores.

[0094] S4, Facial Pressure Adjustment;

[0095] The main control module 5 controls the airbag adjustment module 8 to adjust the airbag pressure of the airbag unit 801 located in the high-risk area and the airbag unit 801 adjacent to it. In case of local temperature abnormalities, the main control module 5 starts the airbag pressure adjustment algorithm to adjust the pressure of the airbag unit 801 in the high-risk area and the adjacent area, and sets the pressure equalization threshold to ensure the overall force balance on the face.

[0096] The pressure adjustment method for the airbag unit 801 includes:

[0097] Numerical setting: Set the baseline pressure threshold Pressure equilibrium threshold Pressure ulcer high-risk area blood pressure reduction threshold Blood pressure reduction threshold There are five, namely , , , and ;

[0098] High-risk area adjustment:

[0099] When a certain airbag unit 801 is in a high-risk area, the main control module 5 controls the corresponding airbag unit 801 to open the pressure relief valve 805 until the corresponding airbag... Maintain this pressure value for 2 minutes;

[0100] If the temperature value collected by the temperature sensor 601 at the airbag unit 801 drops below the set value during the pressure holding period, the high-risk flag is removed; if the temperature value collected by the temperature sensor 601 at the airbag unit 801 is greater than or equal to the set value during the pressure holding period, the pressure of the corresponding airbag continues to be adjusted. Until the high-risk marker is removed; if the airbag unit 801 lowers the pressure threshold for all high-risk pressure ulcer areas. If the high-risk marker is not removed after all adjustments are made, the main control module 5 controls the sound and light alarm 901 of the prompt module 9 to issue a prompt and push the abnormal information to the mobile terminal 11 through the Bluetooth communication module 902.

[0101] Specifically, the main control module 5 controls the opening of the pressure relief valve 805 of the airbag unit 801 corresponding to the high-risk area until the air pressure drops to the first pressure reduction threshold. The pressure value is maintained for 2 minutes; if the temperature at this location drops below the set value within 2 minutes, the high-risk marker is removed. If the temperature does not decrease within 2 minutes, continue depressurizing until the second depressurization threshold is reached. This process continues, gradually reducing the pressure until the temperature drops. If the temperature still does not drop after all five threshold levels have been adjusted, the main control module 5 triggers the prompting module 9 to issue an abnormal prompt.

[0102] Normal adjustment: When the pressure difference between adjacent airbag units 801 At that time, the main control module 5 controls the airbag adjustment module 8 to inflate and deflate until the pressure difference is reached. Avoid applying too much or too little pressure to any part of the face.

[0103] S5. After the airbag pressure is adjusted, if the temperature collected by the temperature sensor 601 in the high-risk area drops below the set value within 2 minutes, the high-risk area is released.

[0104] If the temperature does not drop within 2 minutes, then perform the facial pressure adjustment in step S3 again.

[0105] S6. If the high-risk area is lifted, pressure sensor 701 and temperature sensor 601 continue to collect data in real time and enter the continuous monitoring stage until the system is shut down.

[0106] The facial pressure ulcer prevention system in this embodiment, through modular design and closed-loop control logic, realizes posture monitoring, precise temperature and pressure acquisition, anticipatory prediction of pressure ulcer risk, and dynamic adjustment of airbag pressure during the face-prone lying process. It effectively solves the problem of traditional prone lying devices lacking a pressure ulcer monitoring mechanism, and can significantly reduce the incidence of facial pressure ulcers in prone lying patients, improving nursing safety and comfort.

[0107] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A facial pressure ulcer prevention system, characterized in that, It includes a pillow body (1), a main control module (5), a temperature sensing module (6), a pressure sensing module (7), an airbag adjustment module (8), and a prompting module (9); The pillow body (1) includes a relief opening (101) that is adapted to the contour of the human mouth and nose; The airbag adjustment module (8) includes multiple airbag units (801) and an air pressure sensor (802). The airbag units (801) are fixed on the upper part of the pillow body (1). The multiple airbag units (801) form an airbag area (2) around the outer periphery of the clearance opening (101). The air pressure sensor (802) is used to detect the air pressure inside the airbag unit (801) and corresponds one-to-one with the airbag unit (801). The temperature sensing module (6) includes a temperature sensor (601) located on the surface of the airbag unit (801), and each airbag unit (801) has at least one temperature sensor (601) fixed in place; The pressure sensing module (7) includes a pressure sensor (701) fixed on the surface of the airbag unit (801). The airbag unit (801) corresponds one-to-one with the temperature sensor (601). The temperature sensor (601) is pasted and fixed on the surface of the pressure sensor (701) to form a sensor group (3). The main control module (5) is electrically connected to the temperature sensing module (6), pressure sensing module (7), airbag adjustment module (8) and prompt module (9) respectively. The main control module (5) is used to process pressure and temperature signals, combine temperature and pressure data, dynamically control the independent airbag unit (801) of the airbag adjustment module (8) to inflate and deflate, and trigger the body prompt module (9) to issue a prompt when the temperature is abnormal in the whole range.

2. The facial pressure ulcer prevention system according to claim 1, characterized in that, The airbag adjustment module (8) also includes an air pump (803), an air intake valve (804), and a pressure relief valve (805). Each airbag unit (801) is connected to an air intake valve (804) and a pressure relief valve (805). The air pump (803) is connected to each air intake valve (804) for supplying air to the airbag unit (801).

3. The facial pressure ulcer prevention system according to claim 1, characterized in that, The prompting module (9) includes an audible and visual alarm (901) and a Bluetooth communication module (902). The audible and visual alarm (901) is used to issue audible and visual prompts, and the Bluetooth communication module (902) is used to upload data to the mobile terminal (11).

4. The facial pressure ulcer prevention system according to claim 1, characterized in that, The pressure sensor (701) is a thin-film pressure sensor, distributed on the surface of the airbag unit (801) and surrounding the mouth and nose avoidance opening (101). The detection range of the pressure sensor (701) is 0.2-50kPa and the sampling frequency is ≥10Hz. The temperature sensor (601) is a patch-type temperature sensor with a detection range of 30-45℃, a sampling frequency of ≥10Hz, and an accuracy of ±0.1℃.

5. A control method for a facial pressure ulcer prevention system, applied to a facial pressure ulcer prevention system as described in any one of claims 1-5, characterized in that, Includes the following steps: S1. The system starts and performs facial posture monitoring; S2, Data acquisition and processing: Temperature sensor (601) collects the face temperature at each airbag unit (801) in real time; The pressure sensor (701) collects the facial pressure at each airbag unit (801) in real time; The data collected by the temperature sensor (601) and the pressure sensor (701) are fed back to the main control module (5) for processing, and the main control module (5) records the initial temperature data; S3. Pressure sore detection: When the main control module (5) collects a temperature value fed back by the temperature sensor (601) that exceeds the set value, it is determined to be a high-risk area and marked. , ...... ; S4. Facial pressure adjustment: The main control module (5) controls the airbag adjustment module (8) to adjust the airbag pressure of the airbag unit (801) located in the high-risk area and the airbag unit (801) adjacent to the airbag unit (801). S5. After the airbag pressure is adjusted, if the temperature collected by the temperature sensor (601) located in the high-risk area drops below the set value within 2 minutes, the high-risk area is released. If the temperature does not drop within 2 minutes, repeat the facial pressure adjustment in step S3. S6. If the high-risk area is lifted, normal monitoring will continue.

6. The control method for a facial pressure ulcer prevention system according to claim 5, characterized in that, After the system is started, each airbag unit (801) in the airbag area (2) is inflated to the basic pressure threshold, and the pressure sensor (802) collects the pressure data in the airbag unit (801). Feedback is sent to the main control module (5); Facial posture monitoring: After the airbag unit (801) is compressed, the main control module (5) determines whether the patient's facial posture remains stable based on the fluctuation of the values ​​of the air pressure sensor (802) in each airbag unit (801). If the fluctuation value is less than the set value for 5 consecutive seconds, the facial posture is considered stable, and step S2 is performed; if the fluctuation value exceeds the set value within 5 seconds, the calculation is recalculated after the fluctuation value is exceeded.

7. The control method for a facial pressure ulcer prevention system according to claim 5, characterized in that, In step S2, the main control module (5) needs to perform Kalman filtering on the data collected by the temperature sensor (601) and the pressure sensor (701) to eliminate noise interference and calculate the denoised pressure value. and temperature values .

8. The control method of the facial pressure ulcer prevention system according to claim 5, characterized in that, In step S3, pressure ulcer assessment includes local temperature anomaly assessment and global temperature anomaly assessment; Judgment of local temperature anomalies: When the number of airbag units (801) in the high-risk area is less than 50% of the total number of airbag units (801), it is judged as a local temperature abnormality. Global temperature anomaly detection: Set the threshold for the proportion of anomalies across the entire domain. When the number of airbag units (801) marked as high-risk areas for pressure ulcers accounts for the proportion of the total number of airbag units (801) This was determined to be a global temperature anomaly. When the temperature sensor (601) senses that the temperature exceeds the temperature threshold If the temperature rises for more than 30 seconds, or the temperature rise exceeds the initial temperature by more than 2°C and lasts for more than 30 seconds, it is determined to be a high-risk area.

9. The control method for a facial pressure ulcer prevention system according to claim 8, characterized in that, When the main control module (5) determines that there is a local temperature abnormality, it proceeds normally to step S4; When the main control module (5) determines that the temperature of the entire area is abnormal, the main control module (5) controls the prompt module (9), the sound and light alarm (901) of the prompt module (9) issues a prompt and pushes the abnormal information to the mobile terminal (11) through the Bluetooth communication module (902); If the risk is eliminated when the temperature is abnormal across the entire range, the patient adjusts their position and the system re-monitors facial posture. If the risk is not eliminated, the prone position will be canceled and the system will be shut down.

10. The control method of the facial pressure ulcer prevention system according to claim 5, characterized in that, It also includes the airbag unit (801) pressure regulation method: Pressure regulation methods include: Numerical setting: Set the baseline pressure threshold Pressure equilibrium threshold Pressure ulcer high-risk area blood pressure reduction threshold Blood pressure reduction threshold There are five, namely , , , and ; Normal adjustment: When the pressure difference between adjacent airbag units (801) At that time, the main control module (5) controls the airbag adjustment module (8) to inflate and deflate until the pressure difference is reached. ; High-risk zone adjustment: When a certain airbag unit (801) is in a high-risk zone, the main control module (5) controls the pressure relief valve (805) of the corresponding airbag unit (801) to open until the corresponding airbag... Maintain this pressure value for 2 minutes; If the temperature value collected by the temperature sensor (601) at the airbag unit (801) drops below the set value during the pressure holding period, the high-risk flag is removed; if the temperature value collected by the temperature sensor (601) at the airbag unit (801) is greater than or equal to the set value during the pressure holding period, the pressure of the corresponding airbag continues to be adjusted. Until the high-risk marker is removed; if the airbag unit (801) lowers the pressure threshold for all high-risk pressure ulcer areas. If the high-risk marker is not removed after all adjustments are made, the main control module (5) controls the sound and light alarm (901) of the prompt module (9) to issue a prompt and push the abnormal information to the mobile terminal (11) through the Bluetooth communication module (902).

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