Method for redistributing body pressure distribution through supporting device

Abstract

The invention provides a method and a system for redistributing body pressure distribution by a support device. The invention is based on a medical mechanism to accurately relieve injury caused by pressure at the osteophysis of the body. When the body of a user is supported by a supporting device such as a mattress, the body posture of the user is calculated from the measured pressure distribution of the body on the two-dimensional mattress, and then the coordinate positions of one or more apophysis positions of the body of the user are calibrated according to the posture characteristics of the user. And then comparing and analyzing the pressure corresponding to each osseous process and the danger probability of pressure injury, and sorting the pressure and the danger probability, so as to locally or integrally adjust the shape and the hardness of the support device to redistribute the pressure distribution applied to the body of the user, thereby reducing or avoiding the danger probability of pressure injury at all the osseous processes.

Description

A method for redistributing body pressure distribution using a supporting device Technical Field

[0001] This invention relates to a method and system for redistributing body pressure using a support device. This method improves the shortcomings of traditional pressure ulcer prevention mattresses, which are unable to accurately predict and effectively treat high-risk areas of pressure injuries on the human body. By combining artificial intelligence technology with a clinical research database and the driving device of a reclining mattress, this method effectively reduces the risk of pressure injuries on the user's bony prominences. Background Art

[0002] Although directly reducing the airbag pressure on the parts of the body that are subject to greater pressure can reduce the risk of bedsores in these parts of the body, the parts of the body that are more susceptible to pressure injuries are not always the same as the parts of the body that are subject to greater pressure. For example, the buttocks are not often a high-risk area for pressure injuries, but the coccyx, located no more than ten centimeters above the buttocks, is often a high-risk area for pressure injuries. In other words, the location of bony prominences in the human body is inherently unevenly distributed, so the ability of different parts to withstand critical pressure will vary. Areas with thin skin and more bones have poor tolerance, while areas with thick skin and more flesh have better tolerance, making certain specific parts of the body high-risk for pressure injuries. Therefore, existing commercial products and related technological developments often cannot specifically treat one or more parts of the body that are more prone to pressure injuries. This is because when the user is lying, sitting, or lying on the support device, the parts of the user's body that are subject to greater pressure are often the parts that are in direct contact with the support device, such as the buttocks, thighs, calves, shoulders, and abdomen, which have more muscles, fat, and subcutaneous tissue. These parts can either buffer the impact of pressure on blood circulation and body tissues, or transfer the pressure on these parts to nearby parts of the body, thereby reducing the chance of injury caused by continuous pressure or sudden high pressure.

[0003] In contrast, one or more bony protrusions (Apophysis) of the human body are almost directly covered by the skin, with less muscle, fat and subcutaneous tissue between the skin and the bone, and there are also few blood vessels for sufficient blood circulation. As a result, the pressure on the bony protrusions is often unable to be buffered or transferred, and is more susceptible to injury than other parts of the body when subjected to the same pressure. In particular, the small amount of subcutaneous tissue and muscles at the bony protrusions are also more susceptible to injury due to continuous long-term pressure or short-term strong pressure. In other words, bony protrusions are often prone to pressure injuries, even if they are not the parts of the user's body that are subject to the greatest pressure. Therefore, the existing method of directly reducing the pressure on the parts subject to higher pressure (such as adjusting the air volume of the airbag to change the pressure on the human body when in contact with the airbag) is basically unable to effectively improve the problem of bony protrusions of the human body being prone to pressure injuries due to pressure, even if these bony protrusions are often adjacent to these parts of the body that are subject to greater pressure. FIG1A shows the coordinates of high-risk areas of bony prominences where the user's body is in direct contact with the support device in various body postures (supine position, lateral position, and half-sleeping position).

[0004] It is generally believed that the internal pressure of an airbag is in a uniform pressure state. However, the reaction pressure on the external surface caused by the external force applied to the airbag is not uniformly distributed. Instead, it varies with the height and shape of the intersection between the force-applying object and the airbag surface. For example, in Figure 1B, even if a disc-shaped object and a cone-shaped object of the same weight act on the same airbag, the local pressure effects will show different reaction pressure distributions. The greater the shape fluctuation, the more severe the uneven pressure condition will be, as shown in Figure 1C.

[0005] The human body has an undulating appearance, not a flat structure. Therefore, when a person lies on a soft mattress, the rebound force and tension of the mattress itself will inevitably cause the reaction pressure of body pressure to be unevenly distributed, varying with the mattress's height and firmness, as shown in Figure 1C. When such a mattress is primarily constructed with compartmentalized air cells, the pressure changes in each compartment can alter the shape and firmness of the mattress. The commonly used term "saturation pressure" is often misunderstood to refer to the air pressure within the air cells. Saturation pressure refers to the saturated internal air pressure. The actual pressure comes from two sources: body pressure and the internal pressure of the air cells.

[0006] Therefore, when the pressure of individual airbags is adjusted, the overall surface pressure distribution is affected. For example, in Figure 1C, if the airbags in zones P1 to P6 are inflated with equal pressure, the surface pressure distribution in the buttocks will be extremely high. If additional pressure is applied to the airbags in zone P3 (for example, by inflating them to a firm position), the pressure in the lower back will gradually increase, while the pressure in the buttocks will gradually decrease. This is because the total weight of the human body is fixed. An increase in the support force distribution in one area will inevitably cause a decrease in support force in other areas, creating a new balance. According to physical principles, an air mattress can redistribute the local pressure distribution of the lying body pressure and reaction forces by adjusting the airbag pressure in each zone. Conventional wisdom suggests that an air mattress can directly increase or decrease the surface reaction pressure of the human body simply by increasing or decreasing the air pressure in the airbags. This method does not meaningfully reduce the actual surface pressure on the human body. Existing technologies all rely on adjusting a single airbag. This involves first calculating a single area on the body where a pressure injury may occur, then adjusting the internal pressure of the corresponding airbag. However, no matter how precisely this approach analyzes the injury location, the solution remains limited to simply adjusting the internal pressure of the corresponding single airbag, failing to effectively adjust the risk area.

[0007] In summary, the relevant industry is currently in urgent need of developing a method and system for redistributing body pressure distribution by means of a support device so as to reduce or even eliminate the risk of pressure injuries to the user's body.

[0008] Summary of the Invention

[0009] Unlike the traditional method of directly inflating and deflating airbags, regulating the pressure distribution of the human body requires a comprehensive consideration and calculation of the overall pressure distribution of the human body within the air mattress and the interaction between the various airbag compartments. Understanding how to redistribute the internal gas pressure of all compartments and combine them, ultimately redistributing the reaction pressure on the human body while lying down, or achieving another desired distribution pattern, thereby eliminating the risk of epidermal pressure injuries in bedridden patients. One objective of the present invention is to provide a method for redistributing body pressure distribution within a support device. First, when a user is supported by the support device, such as when sitting or lying on a mattress, a plurality of pressure sensors within the support device are used to measure and generate a two-dimensional pressure distribution corresponding to the pressure applied by the user to the support device (or the pressure exerted by the user due to contact with the support device). Next, this two-dimensional pressure distribution is analyzed to infer the user's current body posture. Specifically, the measured pressure distribution is used to infer how the user's skeletal muscles are distributed on the support device. Calculating characteristic parameters of this pressure distribution allows the user's current posture to be interpreted. Then, the body posture is analyzed to calibrate the position of one or more bony protrusions of the user's body on the support device. In other words, it is not to find one or more places on the user's body that are under greater pressure, but to find one or more places on the user's body that are more likely to be injured due to continuous pressure or sudden high pressure. Next, it is determined whether the probability of pressure injuries corresponding to one or more bony protrusions is acceptable. For example, whether the probability of occurrence is less than or equal to the common critical probability value of all bony protrusions, or less than the individual critical probability value of each bony protrusion. If the above conditions are met, it is acceptable. If all are acceptable, no further processing will be performed. If not all are acceptable, the support force generated by one or more support units must be cyclically adjusted until the probability of pressure injuries corresponding to all bony protrusions is acceptable.

[0010] Obviously, the main difference between the method of redistributing body pressure using a support device proposed in the present invention and existing methods for improving bedsores is that the method proposed in the present invention first locates one or more bony protrusions of the user's body at one or more specific locations on the support device, and then adjusts the different support forces applied by the support device to different parts of the user's body as needed, thereby reducing the pressure on the user's body at these one or more bony protrusions, thereby reducing or even eliminating the probability of pressure injuries at these bony protrusions. In other words, how to locate the bony protrusions, how to determine the probability of pressure injuries at these bony protrusions, and how to adjust the different support forces applied by the support device to different parts of the user's body to reduce or even eliminate the probability of pressure injuries at these bony protrusions are all key features of the method proposed in the present invention.

[0011] Another objective of the present invention is to address pressure injuries that are prone to occur at bony prominences and to reduce and eliminate them by adjusting the pressure applied to various parts of the user's body. Specifically, a method is proposed for redistributing body pressure on a support device. Compared to existing commercial products and prior art research and development, which focus on treating pressure sores that are prone to occur at high-pressure areas and directly reducing pressure at high-pressure areas, the present invention first determines the overall two-dimensional pressure distribution on the body surface. Then, after determining the user's body posture on the support device, the locations of the bony prominences on the support device are determined. Furthermore, after determining the probability of pressure injuries at each bony prominence, the pressure applied by the support device to the user is adjusted to reduce the probability of pressure injuries at each bony prominence. In other words, starting with the user sitting, lying, or lying prone on a support device such as an air mattress, the methods for measuring the pressure generated by the contact between the user's body and the support device, generating a two-dimensional pressure distribution relative to the user's body, and determining the user's body posture from the two-dimensional pressure distribution are similar to those of existing products / techniques. However, existing products / techniques directly identify one or more parts of the user's body that are subject to greater pressure based on the user's body posture, and directly adjust the pressure applied to these one or more parts by the support device. However, the present invention further identifies one or more bony protrusions on the user's body based on the user's body posture, and adjusts the supporting force applied by the support device to the user's body to reduce the pressure on these one or more bony protrusions and the probability of pressure injuries. In other words, the corresponding pressure of each part of the entire body pressure distribution is redistributed. Next, a new overall two-dimensional pressure distribution of the body surface is re-mapped. If the optimized two-dimensional pressure distribution is not achieved, the above steps are repeated until the optimized two-dimensional pressure distribution is achieved. In this process, the airbags of the airbag assembly are also continuously adjusted to the optimal pressure configuration.

[0012] Another object of the present invention is to provide a method for redistributing body pressure distribution by a support device, which includes obtaining a two-dimensional pressure image, obtaining characteristic parameters from the two-dimensional pressure image analysis, and obtaining body shape factors (height, weight, waist circumference, limb defects). By performing machine learning and big data comparison and judgment on the above, the lying posture and the coordinate position of each bony protrusion can be obtained, and the points that will be compressed can be obtained from the lying posture (different for lying on the front and lying on the side). According to the characteristics of the pressure image and the lying posture, the coordinate position of the specific bony protrusion can be calibrated, and the clinical database can be compared to calculate the ratio of the coordinate pressure of the dangerous part of the bony protrusion to be safe, and converted back to the shape or hardness of the support unit to meet the pressure redistribution pattern. The support device is driven while the pressure distribution is fed back, and the operation is repeated until the target pressure is met.

[0013] BRIEF DESCRIPTION OF THE DRAWINGS

[0014] FIG1A is a schematic diagram of human body postures and corresponding bony protrusions.

[0015] 1B and 1C are schematic diagrams showing the relationship between the pressure distribution of the human body and the equalized pressure inside the airbag.

[0016] 2A to 2D are schematic diagrams of a method for redistributing body pressure using a support device according to the present invention.

[0017] 3A and 3B are schematic diagrams of a system architecture of a method for redistributing body pressure using a supporting device according to the present invention.

[0018] FIG4 is a basic flow chart of a method for redistributing body pressure distribution by a support device proposed by the present invention.

[0019] 5A and 5B are schematic diagrams of the application of the present invention.

[0020]

Main component symbol description

[0021] 300: Improved pressure injury system

[0022] 301: Support device

[0023] 3011: Support unit

[0024] 3012: Pressure sensor

[0025] 3013: Interface module

[0026] 302: Control device

[0027] 309: User's Body

[0028] 410, 420, 430, 440, 450: Step boxes

[0029] The best way to implement the invention

[0030] The basic concepts of the method for redistributing body pressure on a support device proposed by the present invention are illustrated in Figures 2A to 2D. First, as shown in Figure 2A, when the user's body is positioned on the support device, the pressure exerted on different parts of the support device is measured to obtain a two-dimensional pressure distribution corresponding to the user's body posture. This diagram uses the user lying upright or lying on their side on the support device as an example. It can be seen that greater pressure is exerted on the user's shoulders and hips. Next, the user's body posture is inferred based on this two-dimensional pressure distribution. Generally, this can be done using artificial intelligence, leveraging its immense computing power and increasingly accurate learning capabilities. Then, as shown in Figure 2B, the positions of the various bony protrusions where the user's body meets the support device are demarcated based on the inferred body posture. This diagram uses the user's body posture of lying upright or lying on their side as an example, with the bony protrusions marked with a cross. The reason for identifying body posture first is that the bony protrusions contacting the support device are not identical in different body postures. For example, when lying on their side, the user's coccyx (tail vertebrae) cannot directly contact the support device, while when lying upright, the user's hip bones cannot directly contact the support device. After the body posture is identified, it is necessary to calculate which bony protrusions will be in contact with the support device to determine the coordinates of each of these bony protrusions on the support device (for example, by calibrating them based on the external contour and internal undulation features).

[0031] As shown in Figure 2C, the areas of the body subject to greater pressure are not necessarily bony prominences (indicated by triangles), although they are often adjacent. As shown in Figure 2D, along line AA, which runs through the center of the human body from head to tail, different parts of the body experience varying levels of pressure, but one or more areas will always experience a pressure level not less than the critical pressure value. The figure clearly shows that the pelvis corresponds directly to the area of ​​higher critical pressure (high-risk pressure zone). However, this area also has more muscle and fat to buffer and distribute the pressure, so the peak pressure is not necessarily equivalent to the actual strain site; it is actually a safe zone. In contrast, a section of the spine that directly bears pressure (e.g., sacrum strain) has a lower critical pressure and becomes a relatively high-risk zone. If the pressure exceeds three hours of continuous cumulative pressure, the pressure level at which tissue changes occur is the critical pressure for inducing pressure ulcers. The critical pressure for pressure injuries is related to body shape, posture, and health status, and can be defined based on clinical research data or data from pressure injury literature. It should be noted that prior art techniques have all relied on inference, directly presetting the location of the pressure peak as the strain site and then directly adjusting the airbag pressure at the location of the pressure peak. This results in an ineffective reduction of damage to the actual strain site. Therefore, the present invention proposes that, when the user's body weight remains constant, the pressure applied to different body parts can be adjusted to reduce or even eliminate the probability of any body part being subjected to pressure exceeding a critical pressure value, i.e., pressure reconfiguration. Since the user's body weight is constant, reducing the pressure on one part will inevitably increase the pressure on other parts. Therefore, a key principle when adjusting the pressure applied to various body parts is to ensure that, after adjustment, the pressure applied to one or more body parts susceptible to pressure injury is below the critical pressure value. It is even more ideal to ensure that the pressure applied to any body part is below the critical pressure value after adjustment, rather than simply reducing the pressure applied to any body part that was above the critical pressure value before adjustment. Furthermore, when adjusting the pressure applied to various body parts by adjusting the individual support units (e.g., airbags), it is generally advisable to minimize the number of support units that need to be adjusted (e.g., the number of airbags whose inflation level is adjusted).

[0032] The basic system architecture of the method for redistributing body pressure distribution using a support device proposed in the present invention is shown in Figures 3A and 3B. The pressure injury improvement system 300 includes at least a support device 301 and a control device 302, and the support device 301 includes at least a plurality of support units 3011, a plurality of pressure sensors 3022, and an interface module 3013. The support units 3011 are located inside the support device 301 and are arranged in a two-dimensional array (a first two-dimensional array) and can generate the same or different support forces. The pressure sensors 3012 are located between the support units 3011 and the specific side of the support device 301 that contacts the user's body (or supports the user's body), and are arranged in a two-dimensional array (a second two-dimensional array) inside the support device 301. In this way, these support units 3011 can respectively generate support forces to support the user's body who is sitting, lying, or sprawling on a specific side of the support device 301, and the pressure sensor 3012 can sense the pressure exerted on various parts of the user's body on the specific side, thereby generating a two-dimensional pressure distribution corresponding to the user's body posture. The interface module 3013 is respectively connected to the support units 3011 and the pressure sensors 3012 to transmit information used to adjust the support forces respectively generated by one or more support units 3011, and to receive the pressure values ​​from this specific side (i.e., the pressure values ​​between the user's body and the support device) respectively measured by one or more pressure sensors 3012. The interface module 3013 is connected to the control device 302, and the control device 302 adjusts the support forces generated by the support units 3011 according to the measurement results of the pressure sensors 3012, thereby adjusting the pressure exerted on different parts of the entire user's body on the specific side. The control device 302 can analyze the two-dimensional pressure distribution and use it to infer the user's body posture, and then calibrate the position of one or more bony protrusions of the user's body on this specific side. When the probability of pressure injury occurring at at least one bony protrusion is unacceptable, the control device 302 cyclically adjusts at least one supporting force generated by at least one supporting unit until the probability of pressure injury occurring at one or more bony protrusions where the user's body and the supporting device contact each other is acceptable.

[0033] The control device 302 of the present invention can interact with the support device 301 through the interface module 3013, such as receiving measurement data from the pressure sensor 3012 and controlling the support unit 3011 to adjust the support force applied to different parts of the user's body. The control device 302 can be any electronic device with a built-in application (App) for interacting with the support device 301, such as a smartphone, tablet, laptop, desktop computer, etc., and the interface module 3013 can be any wired or wireless communication module, such as a cable, Bluetooth module, Wi-Fi module, infrared module, and wireless communication module. Moreover, the support device 301 and the control device 302 can be two separate hardware components or two integrated hardware components. For example, one control device 302 can correspond to multiple support devices 301 to simplify the task of taking care of multiple devices at the same time.

[0034] The system for redistributing body pressure within a support device proposed in the present invention has several commonly used options. Since the present invention is intended to adjust the pressure applied to bony prominences to reduce and eliminate the likelihood of pressure injuries at these prominences, and as shown in FIG1B , the area of ​​any bony prominence is often comparable to the size of a coin, in order to accurately locate each bony prominence on the support device 301, the distance between adjacent pressure sensors 3012 cannot be an integer multiple of the coin size. Some testing results indicate that the distance between adjacent pressure sensors can be maintained at less than three centimeters, such as less than three centimeters between edges or less than three centimeters between centers. The support force generated by the airbags in the support unit 3011 can be adjusted by adjusting the degree of inflation. Considering the size of both the airbags and the pressure sensors 3012, the distribution density of the pressure sensors 3012 is typically higher than that of the support units 3011. Alternatively, multiple smaller, more densely packed airbags can be used as the support unit 3011. In addition, in order to effectively measure the degree of contact (expressed by the pressure received) between different parts of the user's body and different parts of the specific side of the support device 301 when the user contacts the support device 301, since the user's body posture on the part of the specific side of the support device 301 can change at any time, the pressure sensors 3012 are often arranged together in a two-dimensional array (a first two-dimensional array), and the support units 3011 are usually arranged together in another two-dimensional array (a second two-dimensional array), so as to fully and accurately measure the different pressures caused by different parts of the user's body on the specific side of the support device 301.

[0035] Furthermore, each support unit 3011 can vary the support force it generates to adjust the pressure applied to different parts of the user's body. Since the human body is not a rectangular solid with only straight edges, when the user's body is supported by multiple support units 3011, the different support units 3011 contacting different parts of the user's body 309 often have different adjustable profiles, thereby appropriately supporting the user's body and adjusting the support force applied to the user's body. That is, the support units 3011 can adjust their vertical height, hardness, or even their horizontal dimensions. By varying the amount or flow rate of fluid, such as gas or liquid, flowing through them, the support units 3011 can vary their generated support force and / or dimensional profile. Since the support device 301 is designed to reduce damage to the user's body caused by excessive and / or prolonged pressure, the support units 3011 will generate their respective support forces (whether the same or different) before the user is positioned on that particular side. Before the user's body is supported by the support device 301, the air cells of the support units 3011 are inflated to different heights, thereby properly supporting the user's body and reducing discomfort. Furthermore, the surface of this specific side is covered with a soft or deformable material to reduce the pressure exerted on the user's body when the user's body comes into contact with this specific side.

[0036] The control device 302 may have built-in artificial intelligence for processing information from the pressure sensors 3012 and adjusting the support force generated by the support unit 3011. The control device 302 may use artificial intelligence to execute the method for improving pressure injuries proposed in the present invention, thereby continuously optimizing the artificial intelligence and improving pressure injuries with increasing accuracy and precision using various databases, various reference information, and tests that have been performed. The control device 302 may use artificial intelligence to analyze the two-dimensional pressure distribution measured by the pressure sensors 3012 and infer the body posture of the user on the support device 301. The control device 302 may also use artificial intelligence to calibrate the position of one or more bony protrusions of the body on a specific side of the support device 301 based on the user's body posture. The control device may use artificial intelligence to determine the probability of pressure injuries at each bony protrusion. When the probability of pressure injuries at at least one bony protrusion is unacceptable, such as when the probability is greater than a common critical probability value for all bony protrusions or when the probability is greater than a critical probability value for each bony protrusion, the control device may cyclically adjust the support force generated by at least one support unit 3011 until the probability of pressure injuries at all bony protrusions is acceptable. Alternatively, the artificial intelligence may be trained by referring to the relationship between body posture and the position of one or more bony protrusions obtained by other means, or by referring to the improvement results of adjusting one or more support units on pressure injuries.

[0037] As shown in FIG4 , the present invention proposes a basic flow chart of a system for redistributing body pressure distribution using a support device: First, as shown in step box 410, a support device is provided, the support device having a plurality of support units and a plurality of pressure sensors. The support units can respectively generate their own support forces and are arranged in a first two-dimensional array relative to each other, and the pressure sensors are located between the support units and a specific side of the support device and are arranged in a second two-dimensional array relative to each other. Secondly, as shown in step box 420, when the user is supported on this specific side, the pressure sensor measures and generates a two-dimensional pressure distribution. Then, as shown in step box 430, the two-dimensional pressure distribution is analyzed to infer the user's body posture. Then, as shown in step box 440, the user's body posture is analyzed to calibrate the positions of one or more bony protrusions of the user's body in the support device. Finally, as shown in step box 450, it is determined whether the probability of pressure injury occurrence corresponding to all bony protrusions is acceptable, for example, they are all lower than the common critical probability value of all bony protrusions or lower than the individual critical probability value of each bony protrusion. If so, the adjustment of the support force generated by these support units is stopped. If not, the support force generated by one or more support units is cyclically adjusted until the probability of pressure injury occurrence corresponding to all bony protrusions is acceptable. In other words, when the user is supported by the support device, a two-dimensional pressure distribution is measured between the user's body and a specific side of the support device, and then the two-dimensional pressure distribution is analyzed to find one or more bony protrusions that the user's body directly contacts the specific side of the support device (especially the respective positions of each bony protrusion on this specific side of the support device). Finally, the different support forces applied by the support device to different parts of the user's body are adjusted until the pressure at each bony protrusion that the user's body directly contacts the specific side of the support device is reduced to an acceptable range.

[0038] Obviously, the mainstream commercial approach is to directly reduce the pressure on the user's body where it is most stressed. However, the specific content of step 410 and step 420 of the present invention is to calibrate the location of one or more bony protrusions between the user's body and the support device based on the pressure distribution of various parts of the user's body. Therefore, it is necessary to obtain a two-dimensional pressure distribution corresponding to the supporting force applied to the user's body by a specific side of the support device. Moreover, the commercial approach directly adjusts the pressure on certain parts, while the present invention requires processing the two-dimensional pressure distribution to obtain the comprehensive location of bony protrusions, as shown in step 430 to step 450, and simultaneously making relevant adjustments to reduce the probability of pressure injuries at these bony protrusions.

[0039] In step 430, there are two options for analyzing the two-dimensional pressure distribution to infer the user's body posture: Option 1 is to analyze the two-dimensional pressure distribution and infer the user's body posture based on the user's physiological information. Since the forces on bony prominences are generally not the greatest on the user's body, the two-dimensional pressure distribution can only display the pressure magnitude at each location on a specific side of the support device and cannot directly indicate the location of each bony prominence. Therefore, it is necessary to further map the two-dimensional pressure distribution to the user's body based on the specific details of the user's body and infer the user's body posture on the support device, such as lying, reclining, sitting, lying upright, lying on the side, prone, spread-eagled, hands placed on the chest, legs stretched out, hands under the head, sitting cross-legged, kneeling, on all fours, lying down, prone, lying on the side, and crossed arms and legs. For example, based on whether the user has a prosthetic limb or assistive device and its size and contour, the portion of the two-dimensional pressure distribution corresponding to the prosthetic limb or assistive device can be excluded. As a result, some of the two-dimensional pressure distribution does not correspond to any bony prominences on the user's body. The user's disability, such as limb loss, can also be used to reduce the number of possible considerations when analyzing the body posture to which the two-dimensional pressure distribution may correspond. For example, if the user is missing an arm and does not have a prosthetic limb, there is no need to consider a body posture in which both hands contact a specific side of the support device. Furthermore, the user's body type and medical conditions, such as whether the user is overweight in the waist, abdomen, thighs, hips, or limbs, or whether the user has edema, tumors, fractures, bone curvature, or joint stiffness, and the severity of the disease, can be used to more efficiently locate the bones in the two-dimensional pressure distribution that correspond to the body posture when analyzing the body posture to which the two-dimensional pressure distribution corresponds.

[0040] On the other hand, the user's height, limb length, and weight are all basic physiological information that can be used to determine which areas of higher pressure in the two-dimensional pressure distribution correspond to the same user and to eliminate overweight or underweight signals that are unrelated to the user's body (at least, unrelated to the user's bone position). Alternatively, another option is to analyze the two-dimensional pressure distribution and infer body posture by referring to a database model. This database model contains a large number of two-dimensional pressure distributions generated by previous tests and a large number of verified corresponding body postures. In other words, by comparing with a large amount of data, a previous two-dimensional pressure distribution that is closest to the current two-dimensional pressure distribution (or several similar previous two-dimensional pressure distributions) can be found. The previous body posture corresponding to this previous two-dimensional pressure distribution (or when these previous two-dimensional pressure distributions all correspond to a certain previous body posture) can then be used directly as the current body posture or as a starting point for inferring the current body posture. Obviously, the former option allows for accurate inference of the user's body posture based on their individual conditions, while the latter option allows for faster inference of the body posture.

[0041] In step 440, there are four common options for analyzing the user's body posture to calibrate the positions of one or more bony protrusions on the user's body within the support device. One option is to first calibrate one or more body parts based on the body posture and the two-dimensional pressure distribution, and then calibrate the positions of one or more bony protrusions within the support device based on the user's physiological information. For example, first determine which body parts correspond to which pressure portions in the two-dimensional pressure distribution, and then determine the positions of one or more bony protrusions within each body part within each pressure portion based on various information related to the user's body. For example, when the body posture is supine, first determine which pressure portion corresponds to the head, shoulders, buttocks, or limb joints, and then determine the specific positions of the user's occipital bone and other bony protrusions within the support device based on the general human anatomy, such as the occipital bone being approximately located in the middle of the head when supine.

[0042] Another approach is to first analyze the user's posture to infer the position of the body's bones and muscles on the support device, and then perform graphical calculations to calibrate the position of one or more bony protrusions on the support device. Specifically, after determining the user's posture, the distribution of the user's bones and muscles in this posture is determined based on general anatomy or even physiological information. The corresponding positions on the support device are then calculated based on the two-dimensional pressure distribution. Finally, the positions of the bony protrusions on the support device are demarcated based on the general anatomy or physiological information.

[0043] Alternatively, information can be first introduced based on one or more clinical research results to determine which bony prominences are most susceptible to pressure injuries in different body postures. The position of one or more bony prominences on the support device can then be calibrated based on the user's body posture and this two-dimensional pressure distribution. For example, if thousands of experimental results show that pressure injuries are particularly likely to occur on the ischial bones in a semi-recumbent position with the upper body tilted at a 66-degree angle, then when the user's body posture is in the semi-recumbent position with the upper body tilted at a 66-degree angle, the position of the user's ischial bones on the support device can be calibrated solely based on the two-dimensional pressure distribution and the user's body posture.

[0044] Another option is to first convert the user's three-dimensional anatomy into a two-dimensional projection on the plane where the pressure sensors are located based on the user's body posture and physiological information, and then compare this two-dimensional pressure distribution to calibrate the position of one or more bony protuberances on the support device. For example, the user's body posture is first determined based on the user's specific details to determine how the user's body will be distributed in three-dimensional space. This projection is then projected onto the support device to obtain a two-dimensional projection parallel to the plane where the pressure sensors are located. Next, three reference points are identified in the skeletal portion of the two-dimensional projection and their coordinates are calibrated (because three points form a plane). These reference points are then connected to generate a reference plane and a reference line. The coordinates of each bony protuberance that will directly contact the support device in this body posture are gradually converted relative to these three reference points to obtain the coordinates of each bony protuberance on the support device.

[0045] In step box 450, there are two options for how to adjust one or more supporting forces generated by all support units according to the probability of pressure injury at each bony protrusion to reduce or eliminate pressure injuries at all bony protrusions: one is to first compare with one or more medical models to determine the probability of pressure injury at each bony protrusion and generate a decompression strategy sorted by the probability of occurrence, and then cyclically adjust the one or more supporting forces generated by one or more support units and applied to different parts of the user's body until the probability of pressure injury at all bony protrusions is acceptable, for example, all less than the common critical probability value of all bony protrusions or individually less than the critical probability value of each of these bony protrusions. That is, after finding the location of each bony protrusion, the pressure on each bony protrusion is found from the two-dimensional pressure distribution (or it can be regarded as the supporting force on a certain bony protrusion divided by the area of ​​this bony protrusion). Then, based on the results of previous medical research, the probability of each bony protrusion suffering a pressure injury under the influence of factors such as the pressure size and contour shape is determined. Then, starting from the bony protrusion that is most prone to pressure injury, the probability of pressure injury is gradually reduced in order of the size of the probability of pressure injury until the probability of pressure injury on all bony protrusions is acceptable.

[0046] Another option is to adjust the support force generated by one or more support units after finding one or more bony protrusions. If the probability of pressure injuries corresponding to all bony protrusions cannot be made acceptable, such as being less than a critical probability value common to all bony protrusions or less than the critical probability value of each of these bony protrusions individually, then adjust the one or more support forces generated by one or more support units and applied to different parts of the user's body again until the probability of pressure injuries corresponding to all bony protrusions is acceptable. In other words, trial and error can also be used, such as using the computing power of a computer or mobile device to quickly analyze and test a large number of possible configurations of each support unit applying various support forces to different parts of the user's body until a configuration of support units is found that can make the probability of pressure injuries at all bony protrusions acceptable.

[0047] In step box 450, one or more support forces generated by all support units are adjusted based on the probability of pressure injury at each bony protrusion to reduce or eliminate pressure injuries at all bony protrusions. There are four options: the first option is to first find a specific bony protrusion among one or more bony protrusions whose corresponding pressure injury probability is the highest, and then adjust the support force generated by one or more support units until the probability of pressure injury at the specific bony protrusion is less than this critical probability value, and then cycle according to the corresponding pressure injury probability of one or more other bony protrusions that have not yet been processed, until the probability of pressure injury at all bony protrusions is less than this critical probability value. That is, based on whether it is greater than the critical probability value, the risk level of pressure injury at each bony protrusion is judged and whether the support force applied by the support unit has been adjusted to an acceptable standard, and the process is started from the bony protrusion with the highest risk, and the probability of pressure injury at each bony protrusion is reduced one by one until it is below the acceptable critical probability value.

[0048] Option 2: When there are M bony prominences with corresponding pressure injury probabilities greater than zero, only the N bony prominences with the highest pressure injury probabilities are adjusted by adjusting the pressure generated by one or more support units to ensure that the pressure injury probabilities at all N bony prominences are no greater than the critical probability value, where M and N are both positive integers and M is greater than N. This is because completed tests have found that in various human postures, the probability of pressure injuries is often higher or more severe at certain bony prominences. While other bony prominences may also develop pressure injuries, their probability and severity are significantly lower. Therefore, by simply adjusting the bony prominences with the highest pressure injury probabilities, the probability of pressure injuries at other unadjusted bony prominences can essentially be reduced to no greater than the critical probability value.

[0049] Option 3: When there are M bony protuberances whose corresponding pressure injury probability is greater than zero, the pressure reduction strategy for adjusting the pressure generated by one or more support units is to reduce the pressure at the bony protuberance with the highest pressure injury probability by X1%, reduce the pressure at the bony protuberance with the second highest pressure injury probability by X2%, and so on until the pressure at the bony protuberance with the lowest pressure injury probability is reduced by X. M %, where X1, X2, until X M are all greater than zero and X1 is greater than or equal to X2, X2 is greater than or equal to X3, and so on until X M-1 Greater than or equal to X M .

[0050] Option 4: When there are M bony protuberances whose corresponding pressure injury probability is greater than the critical probability value, the pressure reduction strategy for adjusting the pressure generated by one or more support units is to reduce the pressure at the bony protuberance with the highest pressure injury probability by X1%, reduce the pressure at the bony protuberance with the second highest pressure injury probability by X2%, and so on until the pressure at the bony protuberance with the Nth highest pressure injury probability is reduced by X. n %, and the pressure reduction is not set for other bony protrusions with lower probability of pressure injury at their corresponding positions. Here, X1, X2, until X N are all greater than zero and X1 is greater than or equal to X2, X2 is greater than or equal to X3, and so on until X N-1 Greater than or equal to X N , where M and N are both positive integers and N is greater than N. Here, these two options are further variations of the previous options, simplifying the repeated testing of various possible support unit configurations. Instead, they directly reduce the pressure on each of the multiple bony protrusions in proportion to the probability of pressure injuries occurring. The greater the probability of pressure injuries, the more the pressure is reduced, so that the probability of pressure injuries occurring on each bony protrusion can be reduced by adjusting the pressure. Of course, this adjustment method is also based on the empirical rules obtained from many previously completed tests, and each variable M, N, X1, X2..X N ..X M These are all variables that can be adjusted.

[0051] Since in existing commercial products, only the pressure at the location with higher pressure is reduced (or the supporting force generated by the supporting unit corresponding thereto is reduced), in order to reduce the probability of pressure injury at a certain bony protrusion without excessively increasing the probability of pressure injury at other bony protrusions in the present invention, the supporting force generated by one or more supporting units is adjusted simultaneously (or the pressure at one or more parts of the user's body is adjusted simultaneously), thereby simultaneously keeping the probability of pressure injury at one or more bony protrusions lower than a common critical probability value or the critical probability value of each bony protrusion. That is, even if the probability of pressure injury at only one and a single bony protrusion is greater than the acceptable critical probability value, it is not necessary to adjust only the supporting force applied by one or more supporting units closest to this bony protrusion, but it is still possible to adjust the supporting force applied by one or more supporting units farther away from this bony protrusion. After all, under the premise that the user's body weight remains unchanged (even when the total weight of the user's clothes, etc. is added), the redistribution of the different supporting forces applied by each support unit must be considered to avoid reducing the pressure on a certain bony protrusion to an acceptable level while increasing the pressure on another bony protrusion to an unacceptable level.

[0052] In addition, in step box 450, the support units may be adjusted to the expected configuration to be obtained by computer simulation calculation first, and then the support units may be adjusted accordingly. Alternatively, the configuration values ​​of the support units may be adjusted continuously to obtain the desired configuration of the support units. Purely in the spirit of the present invention, both approaches are acceptable. In particular, many tests that have been conducted previously have found that in general medical applications, it is often only necessary to adjust less than five times to obtain a configuration of the support force that should be applied to each support unit so that the probability of pressure injuries at all bony protrusions is acceptable. Therefore, whether using computer simulation or actual adjustment, the final desired result can be achieved quickly, and no non-negligible side effects will be caused to the user's body during the process. That is, one option is to first use computer simulation to obtain a specific adjusted two-dimensional support force distribution that can make the probability of pressure injuries corresponding to all bony protrusions less than this critical probability value, and then actually adjust the support force generated by one or more support units based on this specific adjusted two-dimensional support force distribution. Another option is to obtain a specific adjusted two-dimensional support force distribution that can make the probability of pressure injuries corresponding to all bony protrusions less than this critical probability value, and then actually adjust the support force generated by these support units. Therefore, when this specific adjusted two-dimensional support force distribution is obtained, the support forces generated by these support units have already been adjusted.

[0053] The method for redistributing body pressure using a support device of the present invention may also utilize artificial intelligence to perform steps 430, 440, and / or 450. For example, artificial intelligence may be used to analyze the two-dimensional pressure distribution to infer the user's body posture, and the artificial intelligence may be trained by comparing the obtained two-dimensional pressure distribution and the user's body posture with the two-dimensional pressure distribution and the user's body posture obtained by other methods. Alternatively, artificial intelligence may be used to analyze the body posture to locate the positions of one or more bony protuberances on the user's body on the support device, and the artificial intelligence may be trained by comparing the obtained positions of one or more bony protuberances with the positions of one or more bony protuberances obtained by other methods. For example, artificial intelligence may be used to determine whether the probability of pressure injuries corresponding to all bony protuberances is less than a critical probability value, and to determine how to adjust the support force generated by one or more support units so that the probability of pressure injuries corresponding to all bony protuberances is less than the critical probability value, and the artificial intelligence may be trained by the improvement in pressure injuries caused by the adjustments made to one or more support units.

[0054] The artificial intelligence used can be further adjusted and optimized by executing any of the above step boxes using artificial intelligence and comparing the results obtained by the artificial intelligence with those obtained by other methods; or by executing all three step boxes using artificial intelligence and comparing the pressure injury probability obtained by the artificial intelligence with the pressure injury probability without adjustment. For example, when the correspondence between various human body shapes and various dangerous bony prominences is classified into several groups after accumulating a large number of cases, the human body shape obtained through artificial intelligence processing can be directly compared with these accumulated cases to determine the possible dangerous bony prominences. The human body shape based on the corresponding relationship can also be used to provide feedback and correct such correspondence by comparing the possible dangerous bony prominences identified by artificial intelligence.

[0055] As described above, an embodiment of the present invention provides a method for redistributing body pressure distribution using a support device, which includes the following steps: first, providing a support device to support a lying human body, wherein the support device has a plurality of support units and a plurality of pressure sensing units, wherein the plurality of pressure sensors are located between the plurality of support units and the lying human body, and are continuously monitored in an adjustment process by the plurality of pressure sensors, wherein the plurality of support units are arranged to form one or more two-dimensional arrays, and different support units can generate their own supporting forces respectively, and the plurality of pressure sensors are arranged to form one or more two-dimensional arrays, wherein the initial internal average pressure of the plurality of support units is a specific saturated internal air pressure, and this specific saturated internal air pressure can be measured using a specific value measured by a Shore hardness tester as a reference, and the two dimensions here refer to the X and Y axis directions formed by the plane in which the support units are distributed, and the distribution density of these pressure sensors is higher than the distribution density of these support units. In addition, the above-mentioned pressure sensors are arranged in a two-dimensional array, the above-mentioned support units are arranged in a two-dimensional array, and the distance between the edges of at least two pressure sensors is less than three centimeters, and the distance between the centers of at least two pressure sensors is less than three centimeters, and at least one support unit can adjust at least one of the following: horizontal size, vertical size and hardness, wherein at least one support unit can change the support force it generates by changing the fluid inside it, and at least one support unit can change its dimensional profile by changing the fluid inside it.

[0056] When a person's body contacts and applies pressure to a specific side of the support device, the multiple pressure sensors perform a pressure distribution measurement step to scan a pressure image of the person lying down. These pressure sensors measure the pressure exerted by the person's body on the support device, generating a two-dimensional pressure distribution. This two-dimensional pressure distribution refers to the vertical pressure exerted by the body force at a two-dimensional coordinate position on a position perpendicular to the plane. This two-dimensional pressure distribution is then interpreted and analyzed to generate at least one characteristic parameter. The characteristic parameter further includes boundary shape, the number and arrangement of regional centers of gravity, local peak pressure points, the size and configuration of the line connecting the center of gravity and peak pressure points, and an estimated configuration ratio. The body condition parameters further include measurements, height, weight, and special factors. Then, a lying posture comparison step is performed based on the characteristic parameters and body shape factors to compare and identify the lying posture. The body shape factors include height, weight, waist circumference, limb defects, etc., and the body shape factors can also be obtained from a clinical data database. The lying posture comparison step is an artificial intelligence comparison learning step to infer the user's lying posture in the given situation and classify it into various categories such as supine, left side, right side, prone, and whether the hands and feet are crossed. All steps can be compared, judged, analyzed, and automatically controlled by artificial intelligence machine learning and big data. Afterwards, a bone protrusion coordinate calibration step is performed based on the lying posture and the characteristic parameters to identify the two-dimensional coordinate position of important skeletal muscles lying on the mattress, and calibrate at least one bone protrusion of the lying person's body and the bone protrusion coordinates of the bone protrusion pressing on the support device. Secondly, a pressure injury probability judgment step is performed to detect the local peak pressure corresponding to the bony protrusion coordinates, and at the same time, the probability of pressure injury at at least one of the bony protrusion points is judged, and a risk level is generated for each of the bony protrusion points. The higher the risk level, the higher the local peak pressure at the bony protrusion point, which means the probability of pressure injury is higher. The above-mentioned pressure injury probability judgment step is to judge whether the size of the support pressure is likely to cause pressure injury by using the patient type in the clinical research database, and after calculating the pressure injury probability of multiple bony protrusion points, the risk level is generated for the pressure injury probability of multiple bony protrusion points, and the risk levels are ranked accordingly.

[0057] Then, a risk ranking step is performed based on the risk level to generate a risk ranking for the probability of pressure injury at at least one of the bony protrusions. Based on the risk ranking, the support force allocated to at least one of the bony protrusion coordinates is recalculated, and redistribution model parameters are generated to facilitate the redistribution of the support force required for all the support units of the multiple two-dimensional arrays. Afterwards, an air pressure configuration is generated based on the redistribution model parameters to perform a body pressure distribution redistribution procedure. The individual shapes and hardness of the support units located at the high-risk area for pressure injury are adjusted according to the air pressure configuration, wherein the air pressure configuration includes the air pressure data required to be regulated for all the support units located at the bony protrusions with the risk level. Based on this, the support pressure borne by the support unit when the human body lies on the support device is redistributed, and the local peak pressure corresponding to the high-risk area for pressure injury is reduced.

[0058] In addition, before performing the redistribution procedure of the body pressure distribution, a pressure reduction procedure is first performed according to the pressure reduction percentage and / or the pressure reduction value to reduce the specific saturated internal air pressure, wherein the redistribution model parameters further include the pressure reduction percentage and / or the pressure reduction value, and the pressure reduction percentage is 5% to 35% of the original saturated internal air pressure, and preferably 15% to 25% of the saturated internal air pressure, wherein the pressure reduction percentage is the pressure reduction ratio of the previous saturated internal air pressure. Finally, the pressure distribution measurement step is repeated to generate an updated two-dimensional pressure distribution, and the above steps are repeated based on the updated two-dimensional pressure distribution. If the two-dimensional pressure distribution shows that the local peak pressure corresponding to the high-risk area for pressure injury fails to make the probability of pressure injury at each bony protrusion lower than the predetermined critical probability value, the human body lying pressure image must be scanned cyclically and the redistribution model parameters must be adjusted in batches using the updated two-dimensional pressure distribution until the two-dimensional pressure distribution shows that the probability of pressure injury at each bony protrusion is lower than the critical probability value. If it is not lower than the critical probability value, the risk reduction step is repeated until the risk is reduced to below the critical probability value.

[0059] The pressure distribution adjustment method of the present invention is completely different from the single airbag adjustment method currently used on the market. The method and system for redistributing body pressure distribution in a support device proposed in the present invention aims to find an optimized overall pressure distribution image and adjust the corresponding overall airbag pressure composition accordingly, rather than identifying a single pressure point and adjusting a single airbag. The support device redistribution system proposed in the present invention aims to reduce the surface pressure of the airbags at vulnerable areas of the body, rather than the internal pressure of the airbags. Adjusting the internal pressure of the airbags merely changes the distribution of the supporting force, so that the surface pressure at the most coordinate locations can be adjusted with the minimum number of airbags. As shown in Figure 5A, lowering the pressure of airbag P4 will increase the pressure of airbags P3 and P5. In addition, the internal pressure of each airbag affects the firmness and height of each mattress area. Therefore, combining multiple airbags with different internal pressures will produce different body support pressure distribution images (outside the airbags) for the sleeper, with some areas receiving more pressure and others receiving less pressure, because the overall weight remains unchanged. The present invention can map various pressure distribution methods within the airbag to different pressure distribution images outside the airbag to find the optimal overall pressure distribution method for avoiding pressure sores. As shown in Figure 5B, the present invention will continuously activate the airbag and simultaneously scan the overall pressure image (initially as shown in the leftmost pressure distribution image), then synchronously calculate and feedback control to continuously optimize the surface pressure, and finally obtain an optimized pressure distribution image (such as the rightmost pressure distribution image).

Claims

1. A method for redistributing body pressure distribution by a supporting device, characterized in that: Include: A support device is provided for supporting a reclining human body, the support device comprising a plurality of support units and a plurality of pressure sensing units. The plurality of pressure sensing units are located between the plurality of support units and the reclining human body and are continuously monitored by the plurality of pressure sensing units during an adjustment process. The plurality of support units are arranged to form one or more two-dimensional arrays, and different support units can generate their own supporting forces. The plurality of pressure sensors are arranged to form one or more two-dimensional arrays, wherein the initial internal average pressure of the plurality of support units is a specific saturated internal pressure, and the two dimensions herein refer to the X and Y axes formed by the plane in which the support units are distributed. When a human body contacts and applies pressure to a surface on a specific side of the support device, the plurality of pressure sensors perform a pressure distribution measurement step to scan a pressure image of the lying human body, measure the pressure of the lying human body on the support device, and generate a two-dimensional pressure distribution, wherein the two-dimensional pressure distribution refers to the vertical pressure caused by the body force at the two-dimensional coordinate position on the position perpendicular to the plane; Interpreting and analyzing the two-dimensional pressure distribution and generating at least one characteristic parameter; performing a lying posture comparison step according to the characteristic parameter and the body shape factor to compare and identify the lying posture; performing a bony protuberance coordinate calibration step based on the lying posture and the characteristic parameters to identify the two-dimensional coordinate positions of important skeletal muscles lying on the mattress, and calibrating at least one bony protuberance of the lying person's body and the bony protuberance coordinates where the bony protuberance presses on the support device; performing a pressure injury probability determination step to detect the local peak pressure corresponding to the bony prominence coordinates, and simultaneously determining the probability of a pressure injury occurring at at least one of the bony prominences, and generating a risk score for each bony prominence, wherein a higher risk score indicates a higher local peak pressure at the bony prominence, and thus a higher probability of a pressure injury occurring thereat; performing a risk ranking step based on the risk to generate a risk ranking for the probability of pressure injury occurring at at least one of the bony protuberances, and recalculating and distributing the support force of at least one of the bony protuberance coordinates based on the risk ranking, and generating a redistribution model parameter to facilitate redistribution of the support force required for all the support units of the multiple groups of two-dimensional arrays simultaneously; and The air pressure configuration is generated by the redistribution model parameters to perform the body pressure distribution redistribution process, and the individual shape and hardness of the support unit located at the high-risk area of ​​pressure injury are adjusted according to the air pressure configuration. The air pressure configuration includes the air pressure data required to be regulated by the support unit located at the bony protrusion with the risk level. Based on this, the support pressure borne by the support unit when the human body lies on the support device is redistributed, and the local pressure corresponding to the high-risk area of ​​pressure injury is reduced. Peak pressure.

2. The method according to claim 1, characterized in that The aforementioned body shape factors include height, weight, waist circumference, limb defects, etc., and the body shape factors can also be obtained from a clinical data database.

3. The method according to claim 1, characterized in that The above-mentioned lying posture comparison step is an artificial intelligence comparison learning step to calculate the user's lying posture in the current situation and classify it into various categories such as lying on the back, lying on the left side, lying on the right side, sleeping on the stomach, and whether the hands and feet are crossed. All steps can be compared, judged, analyzed and automatically controlled by artificial intelligence machine learning and big data.

4. The method according to claim 1, wherein It further includes performing a pressure reduction procedure to reduce the specific saturated internal air pressure according to the pressure reduction percentage and / or the pressure reduction value before performing the redistribution procedure of the body pressure distribution, wherein the redistribution model parameters further include the pressure reduction percentage and / or the pressure reduction value, and the pressure reduction percentage is 5% to 35% of the original saturated internal air pressure, and preferably 15% to 25% of the original saturated internal air pressure, wherein the pressure reduction percentage is the pressure reduction ratio of the previous saturated internal air pressure.

5. The method according to claim 1, wherein The method further includes repeating the pressure distribution measurement step and generating an updated two-dimensional pressure distribution, and repeating the above steps according to the updated two-dimensional pressure distribution. If the two-dimensional pressure distribution shows that the local peak pressure corresponding to the high-risk area for pressure injury fails to make the probability of pressure injury at each bony protrusion lower than a predetermined critical probability value, the lying human body pressure image must be scanned cyclically and the redistribution model parameters must be adjusted in batches using the updated two-dimensional pressure distribution until the two-dimensional pressure distribution shows that the probability of pressure injury at each bony protrusion is lower than the critical probability value. If it is not lower than the critical probability value, the risk reduction step is repeated until the risk is reduced to below the critical probability value.

6. The method according to claim 1, characterized in that The method further includes at least one of the following: the distribution density of the pressure sensors is higher than the distribution density of the support units, the pressure sensors are arranged in a two-dimensional array, and the support units are arranged in a two-dimensional array.

7. The method according to claim 1, characterized in that It further includes at least one of the following: the distance between the edges of at least two pressure sensors is less than three centimeters, and the distance between the centers of at least two pressure sensors is less than three centimeters.

8. The method according to claim 1, characterized in that The support unit can adjust at least one of the following: horizontal size, vertical size, and hardness, and the support unit can change the support force generated and its size profile by changing the fluid inside it.

9. A method for redistributing body pressure distribution by a supporting device, characterized in that: Include: A support device is provided, the support device comprising a plurality of support units and a plurality of pressure sensors, the pressure sensors being located between the support units and a specific side of the support device, the support units being arranged to form a first two-dimensional array, and different support units being capable of independently generating their own support forces, and the pressure sensors being arranged to form a second two-dimensional array; Using these pressure sensors to measure and generate a two-dimensional pressure distribution when the user is supported on this particular side; Analyze the two-dimensional pressure distribution and infer the user's body posture; Analyzing the body posture to locate the position of one or more bony protrusions of the user's body on the support device; and Determine whether the probability of pressure injuries corresponding to all bony protrusions is acceptable. If so, stop adjusting the support force generated by these support units. If not, cyclically adjust the support force generated by one or more support units until the probability of pressure injuries corresponding to all bony protrusions is acceptable.

10. The method according to claim 9, characterized in that Furthermore, at least one of the following is included: The distribution density of the pressure sensors is higher than the distribution density of the support units; These pressure sensors are arranged in a two-dimensional array; These support units are arranged in a two-dimensional array; The distance between the edges of at least two pressure sensors is less than three centimeters; The distance between the centers of at least two pressure sensors is less than three centimeters; At least one of the support units can adjust at least one of the following: horizontal size, vertical size, and hardness; At least one supporting unit can change the supporting force generated by changing the fluid inside the supporting unit; and At least one of the support units can have its dimensional profile changed by changing the fluid within the support unit.

11. The method according to claim 9, characterized in that Furthermore, at least one of the following is included: Before the user is supported by the support device, all support units generate the same support force; Before the user is supported by the supporting device, at least two supporting units generate different supporting forces.

12. The method according to claim 9, characterized in that Furthermore, at least one of the following is included: Analyzing the two-dimensional pressure distribution and calculating the body posture with reference to the user's physiological information, where the user's physiological information includes at least one of the following: user height, user weight, user limb length, user body shape, user disability status, user disease status, size outline of the prosthesis used by the user, and size outline of the assistive device used by the user; Analyzing the two-dimensional pressure distribution and inferring the body posture by referring to a database model, wherein the database model includes a plurality of two-dimensional pressure distributions generated by previous tests and a plurality of corresponding verified body postures; One or more body parts are calibrated based on body posture and two-dimensional pressure distribution, and the position of one or more bony protuberances on the support device is calibrated based on the user's physiological information, wherein the body posture further includes one of the following: lying posture, prone posture, side-lying posture, and crossed posture, and the user's physiological information includes one of the following: user height, user weight, user body shape, user disability status, user disease status, size outline of the prosthesis used by the user, and size outline of the assistive device used by the user; Analyzing body posture to infer the position of the body's skeletal muscles on the support device, and then performing graphic calculations to calibrate the position of one or more bony protrusions on the support device; Based on one or more clinical studies, information is introduced on which bony protrusions are more likely to experience pressure injuries in different body postures, and then the position of one or more bony protrusions on the support device is calibrated according to the user's body posture and the two-dimensional pressure distribution; and Based on the user's body posture and physiological information, the user's three-dimensional body structure is converted into a two-dimensional projection on the plane where these pressure sensors are located, and then compared with this two-dimensional pressure distribution to calibrate the position of one or more bony protrusions in this support device.

13. The method according to claim 9, characterized in that Also includes one of the following: The criterion for determining whether the pressure injury probability corresponding to all bony prominences is acceptable is whether the pressure injury probability corresponding to all bony prominences is no greater than the common critical probability value of these bony prominences; The criterion for determining whether the pressure injury occurrence probability corresponding to all bony prominences is acceptable is whether the pressure injury occurrence probability corresponding to each bony prominence is no greater than its respective critical probability value. Comparing with one or more medical models to determine the probability of pressure injury at each bony prominence and generating a decompression strategy ranked by probability, cyclically adjusting the support force generated by one or more support units until the probability of pressure injury at all bony prominences is acceptable; as well as After finding one or more bony protrusions, the support force generated by one or more support units is adjusted. If the probability of pressure injuries corresponding to all bony protrusions cannot be made acceptable, the support force generated by one or more support units is adjusted cyclically until the probability of pressure injuries corresponding to all bony protrusions is acceptable.

14. The method according to claim 9, characterized in that Also includes one of the following: Identify one or more bony prominences with the highest probability of pressure injury occurrence, then adjust the support force generated by one or more support units until the probability of pressure injury occurrence at this specific bony prominence is acceptable. Then, adjust the force in the order of the corresponding pressure injury probability of one or more other bony prominences that have not yet been treated until the probability of pressure injury occurrence at all bony prominences is acceptable. When the probability of pressure injury occurrence at the locations of M bony protuberances is greater than zero, only the pressure generated by one or more support units is adjusted for the N bony protuberances with higher probability of pressure injury occurrence, so that the probability of pressure injury occurrence at the locations of these N bony protuberances is no greater than the critical probability value, where M and N are both positive integers and M is greater than N; When the probability of pressure injury at the corresponding locations of M bony protrusions is greater than zero, the decompression strategy for adjusting the pressure generated by one or more support units is to reduce the pressure at the bony protrusion with the highest probability of pressure injury by X1%, reduce the pressure at the bony protrusion with the second highest probability of pressure injury by X2%, and so on until the pressure at the bony protrusion with the lowest probability of pressure injury is reduced by X. M %, where X1, X2, until X M are not less than zero and X1 is greater than or equal to X2, X2 is greater than or equal to X3, and so on until X M-1 Greater than or equal to X M ; as well as When there are M bony protuberances whose corresponding pressure injury probability is greater than zero, the pressure reduction strategy for adjusting the pressure generated by one or more support units is to reduce the pressure at the bony protuberance with the highest pressure injury probability by X1%, reduce the pressure at the bony protuberance with the second highest pressure injury probability by X2%, and so on until the pressure at the bony protuberance with the Nth highest pressure injury probability is reduced by X1. n %, and for other bony protrusions where the probability of pressure injury is lower, no pressure reduction is set. Here, X1, X2, until X N are all greater than zero and X1 is greater than or equal to X2, X2 is greater than or equal to X3, and so on until X N-1 Greater than or equal to X N , where M and N are both positive integers and M is greater than N.

15. The method according to claim 9, characterized in that Also includes one of the following: First, a computer simulation is used to obtain a specific adjusted two-dimensional support force distribution that can make the probability of pressure injuries corresponding to all bony prominences acceptable, and then the support force generated by one or more support units is actually adjusted based on the specific adjusted two-dimensional support force distribution; as well as When obtaining a specific adjusted two-dimensional support force distribution that can make the probability of pressure injuries corresponding to all bony protrusions acceptable, the support forces generated by these support units are actually adjusted. Therefore, when obtaining this specific adjusted two-dimensional support force distribution, the support forces generated by these support units have already been adjusted.

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