Bedsore prevention and body position management system and method

Abstract

The invention discloses a bedsore prevention and body position management system and method.The system comprises a mattress, a multi-mode sensing unit, a central processing unit and a body position adjusting unit, the mattress is used for providing lying support for a patient, the multi-mode sensing unit is arranged on the mattress, the central processing unit is arranged on the mattress, and the body position adjusting unit is arranged on the central processing unit. The multi-mode sensing unit is used for collecting pressure distribution data, temperature and humidity data and body posture data of a bedridden patient in real time, and the central processing unit is in communication connection with the multi-mode sensing unit and used for receiving, fusing and processing the data collected by the multi-mode sensing unit and conducting bedsore risk assessment based on a preset bedsore risk model. The central processing unit is used for generating a bedsore risk level and a body position management instruction, and the body position adjusting unit is arranged in the mattress, connected with the central processing unit and used for receiving and executing the body position management instruction so as to adjust the distribution of pressure borne by the body surface of a patient. According to the system, real-time monitoring of bedsore risks and automatic body position adjustment are achieved, the nursing load is relieved, and the nursing efficiency and quality are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical care equipment, and in particular to a pressure sore prevention and body position management system and method. BACKGROUND

[0002] Long-term bedridden patients are prone to blood circulation disorders due to continuous pressure on local tissues, thereby inducing pressure ulcers (also known as pressure injuries). The conventional prevention measure in clinical practice is to rely on medical staff to turn over and pat the back of the patient at regular intervals (e.g., every 2 hours). This prevention method has problems such as high dependence on manpower, blind spots in execution, lack of data for decision-making, and lag in prevention effect. Existing pressure sore prevention equipment mainly focuses on single parameter monitoring or simple body position adjustment, lacks multi-modal data fusion and intelligent decision-making capabilities, and is difficult to achieve precise and adaptive pressure sore prevention and body position management. SUMMARY

[0003] The purpose of the present application is to provide a pressure sore prevention and body position management system and its management method, which realizes real-time monitoring of pressure sore risk and automatic adjustment of body position, reduces nursing load, and improves nursing efficiency and quality.

[0004] The purpose of the present application is achieved by adopting the following technical solutions:

[0005] A pressure sore prevention and body position management system, comprising:

[0006] A mattress for providing lying support for a patient;

[0007] A multi-modal sensing unit arranged on the mattress for real-time acquisition of pressure distribution data, temperature and humidity data, and body position attitude data of a bedridden patient;

[0008] A central processing unit in communication connection with the multi-modal sensing unit for receiving and fusing processing of the data acquired by the multi-modal sensing unit, performing pressure sore risk assessment based on a preset pressure sore risk model, and generating a pressure sore risk level and a body position management instruction;

[0009] A body position adjustment unit arranged in the mattress and connected with the central processing unit for receiving and executing the body position management instruction to adjust the pressure distribution on the patient's body surface.

[0010] In one embodiment, the multi-modal sensing unit of the pressure sore prevention and body position management system comprises:

[0011] A pressure sensing module comprising a plurality of distributed pressure sensors for acquiring pressure distribution data of the contact surface between the patient's body and the mattress to form a pressure distribution image;

[0012] a temperature and humidity sensor module comprising a plurality of temperature and humidity sensors arranged on the surface of the mattress contacting the patient's body and / or inside the mattress for collecting temperature and humidity data of the patient's skin surface;

[0013] a body position and posture sensing module comprising an inertial measurement unit for collecting body position and posture data of the patient.

[0014] In one embodiment, the pressure sensor of the anti-pressure ulcer and body position management system is a flexible pressure sensor; and / or,

[0015] The inertial measurement unit comprises at least one of an accelerometer, a gyroscope and a magnetometer.

[0016] In one embodiment, the central processing unit of the anti-pressure ulcer and body position management system comprises:

[0017] a data fusion module for fusing the pressure distribution data, the temperature and humidity data and the body position and posture data;

[0018] a risk assessment module for assessing the pressure ulcer risk level based on the fused data and the preset pressure ulcer risk model;

[0019] a decision module for generating the body position management instruction according to the pressure ulcer risk level.

[0020] In one embodiment, the preset pressure ulcer risk model of the anti-pressure ulcer and body position management system is constructed based on at least one of pressure-time integral, temperature and humidity influence factor and body position and posture duration.

[0021] In one embodiment, the body position adjusting unit of the anti-pressure ulcer and body position management system comprises a plurality of independently controllable air bag groups, and the pressure distribution on the patient's body surface is changed by adjusting the inflation and deflation state of the air bags.

[0022] In one embodiment, the body position adjusting unit of the anti-pressure ulcer and body position management system comprises an adjustable support mechanism, and the patient's body position is changed by adjusting the support height and angle of the support mechanism.

[0023] In one embodiment, the anti-pressure ulcer and body position management system further comprises a human-computer interaction terminal, which is in communication connection with the central processing unit, is used for visually displaying at least one of the pressure distribution data, the temperature and humidity data, the body position and posture data, the pressure ulcer risk level, the body position management instruction and the operation reminding information, and accepts user instructions.

[0024] In one of the embodiments, the anti-pressure ulcer and body position management system further comprises a wireless communication module connected to the central processing unit, configured to wirelessly transmit at least one of the pressure distribution data, the temperature and humidity data, the body position data, the pressure ulcer risk level and the alarm information to a nurse station central monitoring system and / or a mobile terminal of a medical staff.

[0025] An anti-pressure ulcer and body position management method using the anti-pressure ulcer and body position management system, comprising the following steps:

[0026] S1: controlling the multi-modal sensing unit to collect pressure distribution data, temperature and humidity data and body position data of a bedridden patient;

[0027] S2: the central processing unit receives and fuses the data collected by the multi-modal sensing unit, performs pressure ulcer risk assessment based on a preset pressure ulcer risk model, and generates a pressure ulcer risk level;

[0028] S3: the central processing unit generates a corresponding body position management instruction according to the pressure ulcer risk level;

[0029] S4: the body position adjusting unit receives and executes the body position management instruction to automatically adjust the pressure distribution on the patient's body surface.

[0030] Compared with the prior art, the anti-pressure ulcer and body position management system has at least the following beneficial effects:

[0031] The anti-pressure ulcer and body position management system provided by the present application combines a mattress, a multi-modal sensing unit, a central processing unit and a body position adjusting unit, realizes real-time assessment of pressure ulcer risk of a bedridden patient and intelligent management of body position through multi-modal sensing, data fusion analysis and automatic body position adjustment, thereby effectively reducing the incidence of pressure ulcers, reducing the work burden of nursing staff and improving the quality of nursing.

[0032] The multi-modal sensing unit of the anti-pressure ulcer and body position management system integrates a pressure sensing module, a temperature and humidity sensor module and a body position sensing module, realizes comprehensive monitoring of the patient and provides accurate data basis for subsequent risk assessment and body position adjustment.

[0033] The central processing unit of the anti-pressure ulcer and body position management system automatically generates a body position management instruction based on a pressure ulcer risk model, realizing personalized nursing.

[0034] The body position adjusting unit of the anti-pressure ulcer and body position management system automatically executes the instruction, reducing the burden of medical staff.

[0035] The anti-pressure ulcer and body position management system further comprises a human-computer interaction terminal and a wireless communication module, which not only facilitates medical staff to view data and operate control in real time, but also realizes multi-terminal collaborative management. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a schematic diagram of the air bag group of the anti-bedsore and body position management system of an embodiment of the present application;

[0037] Figure 2 is a schematic diagram of the support mechanism of the anti-bedsore and body position management system of an embodiment of the present application.

[0038] In the figure: 1, mattress; 2, central processing unit; 3, body position adjusting unit; 31, air bag group; 32, support mechanism; 41, pressure sensing module; 42, temperature and humidity sensor module; 43, body position posture sensing module; 5, human-computer interaction terminal. DETAILED DESCRIPTION

[0039] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments, however, can be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the inventive concept of example embodiments to those skilled in the art. Like reference numerals refer to like elements throughout the figures, and thus a repetitive description of like elements will be omitted.

[0040] The words expressing position and direction described in the present application are described by taking the drawings as an example, but changes can also be made as needed, and the changes made are included in the protection scope of the present application.

[0041] As shown in Figure 1 and Figure 2 , the embodiments of the present application provide an anti-bedsore and body position management system, which comprises a mattress 1, a multi-modal sensing unit, a central processing unit 2 and a body position adjusting unit 3.

[0042] The mattress 1 is used to provide lying support for patients, and the material thereof adopts a soft, breathable and wear-resistant medical-grade fabric (for example, a polyester fiber and polyurethane composite fabric). The mattress 1 is internally provided with mounting slots adapted to the multi-modal sensing unit and the body position adjusting unit 3, so as to ensure that the multi-modal sensing unit is in full contact with the patient's body surface to collect accurate data, and at the same time, ensure that the action of the body position adjusting unit 3 does not affect the comfort of the patient. The size of the mattress 1 can be designed as a single bed size (such as 190 cm x 90 cm) or a double nursing bed size (such as 200 cm x 150 cm) according to clinical needs, so as to adapt to different nursing scenes.

[0043] The multi-modal sensing unit is arranged on the mattress 1, and specifically can be embedded in the surface layer of the mattress 1 or the inside close to the surface layer, and is in direct or indirect contact with the patient's body surface. The multi-modal sensing unit is used to collect the pressure distribution data, temperature and humidity data and body position posture data of the lying patient in real time, so as to provide a data basis for subsequent risk assessment and body position adjustment.

[0044] Specifically, as shown in Figure 1 and Figure 2 The multi-modal sensing unit can include a pressure sensing module 41, a temperature and humidity sensor module 42, and a body position and posture sensing module 43.

[0045] The pressure sensing module 41 includes a plurality of distributed pressure sensors, which can be preferably flexible pressure sensors (such as flexible piezoresistive sensors based on graphene, carbon nanotubes), with a thickness of less than 2 mm, which can be bent to adapt to the deformation of the mattress 1, avoiding affecting the comfort of the patient. A plurality of pressure sensors are arranged in a matrix (such as a 20x30 sensor array), covering the main stress area of the mattress 1 (such as the area corresponding to the patient's torso, hips, legs), which can collect the pressure distribution data of the contact surface between each part of the patient's body and the mattress 1, and then transmit the data converted into electrical signals to the central processing unit 2, and then form an intuitive pressure distribution image (such as a heat map form), which is convenient for medical staff to observe the local pressure concentration situation.

[0046] The temperature and humidity sensor module 42 includes a plurality of temperature and humidity sensors (such as SHT30 high-precision temperature and humidity sensors), which are arranged on the surface of the mattress 1 and the patient's body surface (such as fixed inside the mattress 1 fabric by sewing or pasting) and / or inside the mattress 1 (close to the body surface contact layer), preferably additional sensors are added in the area of the mattress 1 corresponding to the patient's bony parts (sacrococcygeal part, scapular part, heel part) to monitor the skin temperature and humidity of the parts prone to pressure ulcers. The measurement range of the temperature and humidity sensor is temperature 0-50℃ (accuracy ±0.3℃), humidity 0-100% RH (accuracy ±2% RH), which can collect the temperature and humidity data of the patient's skin surface in real time, reflecting the microenvironment state of the skin. High temperature and high humidity environment can accelerate the softening of the cuticle layer of the skin, reduce the resistance of the skin, and increase the risk of pressure ulcers, so this data is an important indicator for pressure ulcer risk assessment.

[0047] The body position and posture sensing module 43 includes an inertial measurement unit (IMU), which preferably includes an accelerometer, a gyroscope, and a magnetometer (such as MPU9250 9-axis inertial measurement unit), which can be integrated into a small package module (size less than 10mmx10mmx3mm), arranged in the middle area of the mattress 1 (corresponding to the patient's torso position) or directly fixed on the patient's clothes (such as the waist position). The inertial measurement unit can calculate the body position and posture data of the patient by collecting the acceleration, angular velocity and magnetic field intensity data of the patient's body, combined with a data fusion algorithm (such as Kalman filter algorithm), including the patient's lying angle (such as supine, left lateral recumbent 30°, right lateral recumbent 45°), body position duration (such as supine for 1.5 hours) etc., which provides a basis for determining whether the patient needs to adjust the body position.

[0048] The central processing unit 2 is in communication connection with the multi-modal sensing unit through wired (such as USB, RS485) or wireless (such as Bluetooth, WiFi) mode, for receiving and fusing processing the data collected by the multi-modal sensing unit, performing pressure sore risk assessment based on the preset pressure sore risk model, generating pressure sore risk level and body position management instructions. The central processing unit 2 can adopt an embedded processor (such as STM32H7 series single-chip microcomputer) or an industrial computer, which has data storage, operation and instruction generation functions.

[0049] Specifically, the central processing unit 2 can include a data fusion module, a risk assessment module and a decision module.

[0050] The data fusion module receives the raw data transmitted by the pressure sensing module 41, the temperature and humidity sensor module 42 and the body position sensing module 43, first pre-processes the data (such as removing noise and filling missing values), and then uses a multi-source data fusion algorithm (such as weighted average method, D-S evidence theory) to fuse different types of data. For example, the local maximum pressure value in the pressure distribution data, the skin humidity value in the temperature and humidity data, and the body position duration in the body position attitude data are fused to obtain comprehensive data that can fully reflect the current pressure sore risk state of the patient, avoiding the limitations of single data assessment.

[0051] The risk assessment module assesses the pressure sore risk level based on the fused data and the preset pressure sore risk model. The preset pressure sore risk model is constructed based on clinical big data, and its input parameters include at least one of pressure-time integral (i.e. the product of local pressure and duration, reflecting the cumulative effect of tissue compression), temperature and humidity influence factor (such as when the humidity exceeds 60%, the risk coefficient increases by 1.2 times), body position attitude duration (such as supine position lasting more than 2 hours, the risk coefficient increases by 1.5 times), and the output parameter is the pressure sore risk level (such as low risk, medium risk, high risk, extremely high risk). For example, when the pressure-time integral exceeds 30 kPa·h, the skin humidity exceeds 70%, and the supine position lasts for 2.5 hours, the risk assessment module determines that it is high risk, and generates the corresponding risk prompt information.

[0052] The decision module generates the body position management instruction according to the pressure sore risk level. Different risk levels correspond to different body position adjustment strategies: for example, when the risk is low (risk level 1), there is no need to actively adjust the body position, and only the nursing staff needs to be reminded to check every 3 hours; when the risk is medium (risk level 2), a slight pressure adjustment instruction is generated (such as adjusting the local air bag pressure to reduce 10%); when the risk is high (risk level 3), a body position turning instruction is generated (such as adjusting from supine to left lateral decubitus 30°); when the risk is extremely high (risk level 4), an emergency body position adjustment instruction is generated (such as immediately turning the body position and increasing the air cushion inflation amount), and an alarm is triggered at the same time. The body position management instruction includes specific adjustment parameters such as air bag inflation and deflation pressure value, adjustment angle and speed of the support mechanism 32, etc., to ensure accurate execution by the body position adjustment unit 3.

[0053] The body position adjustment unit 3 is arranged in the mattress 1 and connected to the central processing unit 2 through a wired manner (such as a PWM control signal line) for receiving and executing the body position management instruction to adjust the pressure distribution on the patient's body surface.

[0054] Specifically, the body position adjustment unit 3 can adopt one or a combination of the following two implementation modes:

[0055] As shown in Figure 1 The first air bag group 31 adjustment mode, the body position adjustment unit 3 includes a plurality of independently controllable air bag groups 31 (such as head air bag group 31, torso air bag group 31, hip air bag group 31, leg air bag group 31, each group containing 3-5 independent air bags), each air bag is equipped with an independent inflation pump (such as a micro diaphragm pump) and a solenoid valve, the central processing unit 2 controls the start and stop of the inflation pump and the opening and closing of the solenoid valve, adjusts the inflation and deflation state (such as inflation pressure, inflation time) of the air bag, and then changes the pressure distribution on the patient's body surface. For example, when it is detected that the sacrococcygeal pressure of the patient is too high, the central processing unit 2 controls the deflation of the corresponding air bag in the hip air bag group 31 to reduce the support force in this area, so that the pressure is transferred to the surrounding tissue, achieving pressure dispersion; at the same time, the leg air bag group 31 can be controlled to inflate to lift the legs and promote blood circulation in the lower extremities.

[0056] As shown in Figure 2As shown, the second support mechanism 32 adjusts the body position adjustment unit 3 to include an adjustable support mechanism 32 (such as a support assembly composed of a motor-driven lead screw slide or a hydraulic push rod), which is arranged in the back and leg areas of the mattress 1. By controlling the rotation direction and speed of the motor through the central processing unit 2, the support height and angle of the support mechanism 32 (such as the back support mechanism 32 which can be adjusted at an angle of 0-60°, and the leg support mechanism 32 which can be adjusted at an angle of 0-45°) can be adjusted, thereby changing the patient's body position (such as adjusting from supine to semi-recumbent position, knee lying position, etc.). For example, when the patient needs to turn over, the support mechanism 32 can first raise the patient's back by 30°, and then push the patient's body to one side through the side support assembly to achieve a smooth turn over, avoiding the discomfort or secondary injury of the patient caused by manual turn over.

[0057] The system workflow is as follows: first, install the mattress 1 on the bed body, and then send the acquisition instruction to the multi-modal sensing unit through the central processing unit 2 after the patient lies on the mattress 1. The pressure sensing module 41, the temperature and humidity sensor module 42, and the body position sensing module 43 of the multi-modal sensing unit collect the patient's pressure distribution data, temperature and humidity data, and body position data, respectively. The central processing unit 2 receives and fuses the pressure distribution data, temperature and humidity data, and body position data, performs pressure sore risk assessment based on the pre-set pressure sore risk model, generates a pressure sore risk level and a body position management instruction, and the support mechanism 32 or multiple air bags of the body position adjustment unit 3 receive and execute the instruction to adjust the patient's body position.

[0058] The above system, through the combination of the mattress 1, the multi-modal sensing unit, the central processing unit 2, and the body position adjustment unit 3, realizes real-time evaluation of the pressure sore risk of bedridden patients and intelligent management of the body position through multi-modal sensing, data fusion analysis, and automatic body position adjustment, thereby effectively reducing the incidence of pressure sores, reducing the work burden of nursing staff, and improving the quality of nursing.

[0059] As shown in Figure 1 and Figure 2 In one embodiment, the anti-pressure sore and body position management system further includes a human-computer interaction terminal 5, which is in wired (such as HDMI) or wireless (such as WiFi) communication connection with the central processing unit 2, and can be a touch screen tablet computer, an industrial touch screen, etc., which is arranged beside the nursing bed or at the nurse station. The functions of the human-computer interaction terminal 5 include:

[0060] Data visualization display: at least one of the pressure distribution data (such as pressure heat map), temperature and humidity data (such as real-time temperature curve, humidity value), body position data (such as body position angle diagram, body position duration countdown), pressure ulcer risk level (such as different color indicator light: green-low risk, yellow-medium risk, red-high risk), body position management instruction (such as "about to perform left lateral recumbent 30° adjustment") and operation reminder information (such as "please check the patient's skin condition") is displayed in the form of chart, image, etc.

[0061] User instruction receiving: medical staff can input instructions through touch operation, such as manually adjusting body position adjustment parameters (such as increasing air bag pressure), modifying the threshold value of pressure ulcer risk model (such as adjusting the supine duration threshold value from 2 hours to 1.5 hours according to the patient's condition), suspending the automatic body position adjustment function, etc., realizing the combination of manual intervention and automatic control.

[0062] The setting of the man-machine interaction terminal 5 facilitates the real-time viewing of data and operation control by medical staff.

[0063] In one of the embodiments, the anti-pressure ulcer and body position management system further comprises a wireless communication module (such as 4G / 5G module, LoRa module), which is connected with the central processing unit 2 through UART interface, for wirelessly sending at least one of the pressure distribution data, temperature and humidity data, body position data, pressure ulcer risk level and alarm information (such as high risk warning, equipment failure alarm) to the nurse station central monitoring system and / or the mobile terminal (such as smart phone, smart bracelet) of medical staff. For example, when the patient has high risk, the wireless communication module can immediately send alarm information (including patient bed number, risk level, specific data) to the nurse station monitoring system, and send a short message or APP push reminder to the medical staff responsible for the patient, to ensure that the medical staff intervene in time. The setting of the wireless communication module realizes multi-terminal collaborative management.

[0064] As shown in Figure 1 and Figure 2 The embodiment of the present application also provides an anti-pressure ulcer and body position management method, which adopts the anti-pressure ulcer and body position management system, and comprises the following steps: S1-S4.

[0065] S1: controlling the multi-modal sensing unit to collect the pressure distribution data, temperature and humidity data and body position data of the bedridden patient.

[0066] Specifically, the central processing unit 2 sends a data acquisition instruction to the multi-modal sensing unit, the matrix pressure sensor of the pressure sensing module 41 acquires the contact pressure of each part of the patient with the mattress 1 in real time, generates pressure distribution raw data, the temperature and humidity sensor module 42 acquires the temperature and humidity data of the skin surface of the patient and the microenvironment of the mattress 1, and the inertial measurement unit of the body position and posture sensing module 43 acquires the acceleration and angular velocity data of the patient, and calculates the body position and posture data. The data collected by each module is transmitted to the central processing unit 2 at a preset frequency (such as 1 time / second).

[0067] S2: The central processing unit 2 receives and fuses the data collected by the multi-modal sensing unit, performs pressure sore risk assessment based on a preset pressure sore risk model, and generates a pressure sore risk level.

[0068] Specifically, the data fusion module of the central processing unit 2 pre-processes the received raw data (such as removing noise data caused by slight movement of the patient, and filling in missing data caused by temporary sensor failure), and then uses a multi-source data fusion algorithm to fuse the pressure distribution data, temperature and humidity data, and body position and posture data into comprehensive data. The risk assessment module of the central processing unit 2 inputs the fused comprehensive data into a preset pressure sore risk model, and the model calculates according to parameters such as pressure-time integral, temperature and humidity influence factor, and body position duration, outputs the corresponding pressure sore risk level (such as low risk, medium risk, high risk, and extremely high risk), and stores the risk level information in the memory of the central processing unit 2, and simultaneously transmits it to the human-computer interaction terminal 5.

[0069] S3: The central processing unit 2 generates corresponding body position management instructions according to the pressure sore risk level.

[0070] Specifically, the decision module of the central processing unit 2 generates individualized instructions for different risk levels according to a preset risk-instruction corresponding rule:

[0071] If the risk level is low risk (such as pressure-time integral ≤20kPa·h, humidity ≤60%, and body position duration ≤1.5 hours), the instruction “continuous monitoring, check every 3 hours” is generated, and the body position adjusting unit 3 does not need to be started.

[0072] If the risk level is medium risk (such as 20kPa·h<pressure-time integral ≤30kPa·h, 60%<humidity ≤70%, and 1.5 hours<body position duration ≤2 hours), the instruction “local air bag pressure adjustment” is generated (such as controlling the sacrococcygeal air bag to deflate 10%, reducing the local pressure).

[0073] If the risk level is high (e.g. 30 kPa-h < pressure-time integral ≤ 40 kPa-h, 70% < humidity ≤ 80%, 2 hours < body position duration ≤ 2.5 hours), the “body position turning” instruction is generated (e.g. “adjust from supine to left lateral decubitus 30°, adjust the back support mechanism 32 angle to 30°, adjust the leg support mechanism 32 angle to 15°”).

[0074] If the risk level is extremely high (e.g. pressure-time integral > 40 kPa-h, humidity > 80%, body position duration > 2.5 hours), the “emergency body position adjustment + alarm” instruction is generated, which not only controls the body position adjustment unit 3 to perform rapid turning, but also triggers the sound and light alarm, and sends an emergency reminder to the nurse station and the medical staff mobile terminal through the wireless communication module.

[0075] S4: The body position adjustment unit 3 receives and executes the body position management instruction, and automatically adjusts the pressure distribution on the patient's body surface.

[0076] Specifically, if it is the air bag group 31 adjustment mode: the control module of the body position adjustment unit 3 receives the air bag inflation and deflation instruction sent by the central processing unit 2, controls the inflation pump of the corresponding air bag to start (or stop) and the electromagnetic valve to open (or close), adjusts the pressure in the air bag to the value required by the instruction (e.g. reduces the hip air bag pressure from 80 kPa to 70 kPa), thereby changing the contact pressure of the patient's hips with the mattress 1, and achieving pressure dispersion.

[0077] If it is the support mechanism 32 adjustment mode: the motor drive module of the body position adjustment unit 3 receives the support angle adjustment instruction sent by the central processing unit 2, controls the motor to rotate at a preset speed, drives the lead screw sliding table or hydraulic push rod to move, adjusts the height and angle of the support mechanism 32 to the value required by the instruction (e.g. raises the back support mechanism 32 from 0° to 30°, and pushes the lateral support mechanism 32 to tilt the patient's body to the left by 30°), thereby achieving smooth turning of the patient's body position and relieving local tissue pressure.

[0078] During the body position adjustment process, the multi-modal sensing unit continuously collects data and feeds back to the central processing unit 2, and the central processing unit 2 monitors the adjustment effect in real time: if the patient's risk level after adjustment decreases to the safe range (e.g. from medium risk to low risk), the adjustment is stopped; if the risk level does not decrease after adjustment (e.g. due to the patient's excessive weight, the pressure is still too high), a secondary adjustment instruction is generated (e.g. further reduce the air bag pressure or adjust the support mechanism 32), to ensure the accuracy of the body position adjustment and the comfort of the patient.

[0079] The above method, by combining the multi-modal sensing unit, the central processing unit 2 and the body position adjusting unit 3, realizes real-time evaluation of the bedridden patient's risk of bedsores and intelligent management of the body position through multi-modal sensing, data fusion analysis and automatic body position adjustment, thereby effectively reducing the incidence of bedsores, reducing the work burden of nursing staff, improving the nursing effect and nursing quality, and realizing personalized body position management, adapting to different patient needs.

[0080] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application without departing from the principles and purposes of the present application, and all these changes should be within the protection scope of the claims of the present application.

Claims

1. A pressure ulcer prevention and positioning management system, characterized in that, include: Mattress (1), used to provide lying support for the patient; A multimodal sensing unit is installed on the mattress (1) to collect pressure distribution data, temperature and humidity data and body posture data of bedridden patients in real time; The central processing unit (2) is communicatively connected to the multimodal sensing unit and is used to receive and process the data collected by the multimodal sensing unit, perform pressure ulcer risk assessment based on the preset pressure ulcer risk model, and generate pressure ulcer risk level and body position management instructions. A body position adjustment unit (3) is disposed in the mattress (1) and connected to the central processing unit (2) for receiving and executing the body position management instructions to adjust the pressure distribution on the patient's body surface.

2. The pressure ulcer prevention and positioning management system as described in claim 1, characterized in that, The multimodal sensing unit includes: The pressure sensing module (41) includes multiple distributed pressure sensors for collecting pressure distribution data of various parts of the patient's body in contact with the mattress (1) to form a pressure distribution image. Temperature and humidity sensor module (42), the temperature and humidity sensor module (42) includes multiple temperature and humidity sensors, the temperature and humidity sensors are disposed on the surface and / or inside the mattress (1) and the patient's body surface, for collecting temperature and humidity data of the patient's skin surface; The posture sensing module (43) includes an inertial measurement unit for collecting the patient's posture data.

3. The pressure ulcer prevention and positioning management system as described in claim 2, characterized in that, The pressure sensor is a flexible pressure sensor; and / or, The inertial measurement unit includes at least one of an accelerometer, a gyroscope, and a magnetometer.

4. The pressure ulcer prevention and positioning management system as described in claim 1, characterized in that, The central processing unit (2) includes: The data fusion module is used to fuse pressure distribution data, temperature and humidity data, and body posture data. The risk assessment module is used to assess the pressure ulcer risk level based on the fused data and the preset pressure ulcer risk model; The decision module is used to generate the body positioning management instructions based on the pressure ulcer risk level.

5. The pressure ulcer prevention and positioning management system as described in claim 1, characterized in that, The preset pressure ulcer risk model is constructed based on at least one parameter among pressure-time integral, temperature and humidity influence factors, and body posture duration.

6. The pressure ulcer prevention and positioning management system as described in claim 1, characterized in that, The body position adjustment unit (3) includes multiple independently controllable airbag groups (31), which can change the pressure distribution on the patient's body surface by adjusting the inflation and deflation state of the airbags.

7. The pressure ulcer prevention and positioning management system as described in claim 1, characterized in that, The body position adjustment unit (3) includes an adjustable support mechanism (32), which changes the patient's body position by adjusting the support height and angle of the support mechanism (32).

8. The pressure ulcer prevention and positioning management system as described in claim 1, characterized in that, It also includes a human-computer interaction terminal (5), which is communicatively connected to the central processing unit (2) and is used to visually display at least one of the pressure distribution data, temperature and humidity data, body posture data, pressure ulcer risk level, body posture management instructions and operation reminder information, and to accept user instructions.

9. The pressure ulcer prevention and positioning management system as described in claim 1, characterized in that, It also includes a wireless communication module, which is connected to the central processing unit (2) and is used to wirelessly transmit at least one of the pressure distribution data, temperature and humidity data, body position data, pressure ulcer risk level and alarm information to the nurse station central monitoring system and / or the mobile terminal of medical staff.

10. A method for preventing bedsores and managing body position, employing the bedore prevention and body position management system as described in any one of claims 1-9, characterized in that, Includes the following steps: S1: Control the multimodal sensing unit to collect pressure distribution data, temperature and humidity data, and body posture data of bedridden patients; S2: The central processing unit (2) receives and integrates the data collected by the multimodal sensing unit, performs pressure ulcer risk assessment based on the preset pressure ulcer risk model, and generates a pressure ulcer risk level; S3: The central processing unit (2) generates corresponding position management instructions based on the pressure ulcer risk level; S4: The body position adjustment unit (3) receives and executes the body position management command and automatically adjusts the pressure distribution on the patient's body surface.

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