TWI824907B - A method for redistribution of body pressure distribution by a support device - Google Patents

Abstract

A METHOD FOR REDISTRIBUTION OF PRESSURE PROVIDED BY A SUPPORT DEVICE.

The present invention focuses on the pressure injury appeared on one or more bony processes of the human body. When the user’ s body is supported by a supporting device such as a mattress, the body posture is acquired by referring to the measured two-dimensional pressure distribution. Next, one or more bony processes of the human body are identified by referring to the user’ s pathological information. Then, by analyzing the pressure injury probability and corresponding pressure of each bony process, the pressure applied by the supporting device to different parts of the user's body are adjusted. Thus, the risk of the pressure injury on all bony pressures are decreased.

Description

A method for a support device to redistribute body pressure distribution

The present invention relates to a method for a support device to redistribute body pressure distribution. It can improve the shortcomings of traditional pressure ulcer prevention mattresses, which cannot accurately predict pressure injuries in high-risk parts of the human body and effectively deal with them. The present invention uses artificial Intelligent technology combines the clinical research database and the driving device of the lying mattress to effectively reduce the probability of pressure injuries on the bony protrusions of the user's body.

Although directly reducing the air bag pressure on parts of the human body that are subject to greater pressure can reduce the probability of bedsores in these parts of the human body, one or more parts of the human body that are more susceptible to pressure injury are somewhat related to the parts of the human body that are subject to pressure injuries. The one or more areas with greater pressure are not exactly the same. For example, the buttocks are often not a high-risk area for pressure ulcers, but the coccyx, which is located at most ten centimeters above the buttocks, is often a high-risk area for pressure ulcers. In other words, the bony protrusions of the human body are naturally unevenly distributed, so the ability to withstand critical pressure will be different at different locations. Places with thin skin and lots of bones will have poor tolerance, and places with thick skin and lots of flesh will have poor tolerance. The patient's tolerance is better, resulting in certain specific areas becoming high-risk areas for pressure ulcers. Therefore, existing commercial products and related technological developments often cannot specifically target one or more parts of the human body that are more susceptible to pressure injuries. This is because when the user lies, sits, or lies on the support device, the areas where the user's body is subject to greater pressure are often the areas where the user's body is in direct contact with the support device, such as buttocks, thighs, calves, shoulders, and abdomen. Such as parts with more muscles, fat and subcutaneous tissue, which may be able to buffer the impact of pressure on blood circulation and body tissues. The pressure on this part can also be transferred and distributed to nearby body parts, thereby reducing the probability of injury caused by continuous pressure or sudden greater pressure.

In contrast, one or more bony protrusions (Apophysis) of the human body are almost completely covered by skin. There is less muscle, fat and subcutaneous tissue between the skin and bones, and there is also a lack of blood vessels for sufficient blood circulation, so that The pressure on the bony prominence often cannot be buffered or transferred, and is more susceptible to injury than other body parts when subjected to the same pressure. In particular, a few subcutaneous tissues and a few muscles at the bony prominence are also susceptible to long-term sustained pressure or It is caused by short-term strong pressure. That is, bony prominences are often prone to pressure injuries, even if they are not the part of the user's body that experiences the greatest pressure. Therefore, the existing methods of directly reducing the pressure on parts that are subject to higher pressure (such as adjusting the air bag volume to change the pressure on the human body in contact with the air bag) are basically unable to effectively improve the susceptibility to pressure on bony protrusions of the human body due to pressure. Injuries are a problem, even though these bony prominences are often adjacent to parts of the body that are subject to greater stress. Figure 1A shows the coordinate group of high-risk parts of the bony protrusions where the user's body is in direct contact with the support device in body postures (supine position, lateral position, and half-sleeping position).

It is generally recognized that the internal pressure of an airbag is a uniform pressure state, but the reaction pressure on the external surface of the airbag caused by external force is not uniformly distributed, and varies depending on the height and shape of the intersection between the force applying object and the surface of the airbag. As shown in Figure 1B, for example, even if a disk object and a conical object with the same weight act on the same air bag, the resulting local pressure will show a different reaction pressure distribution, and the greater the shape fluctuation, the greater the pressure. The uneven situation will also become more serious, as shown in Figure 1C.

The human body has an undulating appearance rather than a flat structure. Therefore, when the human body lies on a soft mattress, the rebound force and tension of the mattress body will cause the reaction pressure of the body pressure to follow the ups and downs and softness of the mattress. The pressure shows different degrees of uneven distribution of pressure, as shown in Figure 1C. When this mattress is When several zones of air bags are the main structure, the pressure changes of the air bags inflated in each zone will change the shape and hardness of the bed. Generally speaking, the saturation pressure is often misunderstood as the air pressure in the air bag. The saturation pressure is the saturated internal air pressure. There are two actual pressure sources: one is the body pressure, and the other is the internal pressure of the air bag.

Therefore, when the pressure of individual zone airbags is adjusted, it will be linked to the distribution pattern of the overall surface action and reaction pressure. Taking Figure 1C as an example, if the airbags in the P1 to P6 zones are inflated with equal pressure, a very high external surface pressure distribution will appear in the hip area. If more pressure is applied to the airbag in the P3 zone (for example, inflated hard), the waist will be found to be The pressure on the back gradually increases, while the pressure on the buttocks gradually decreases. This is because the total weight of the human body is fixed. If the support distribution in a certain area increases, it will inevitably cause the support force in other parts to decrease, forming a new balance. It can be known from physical principles that the air mattress can redistribute the local pressure distribution pattern of the lying body pressure and reaction force by adjusting the air bag pressure in each zone. Traditionally, it is intuitively believed that an air mattress can directly increase or decrease the surface reaction pressure of the human body by simply inflating and releasing the air pressure in the air bag. This method will not meaningfully decompress the actual surface pressure of the human body. The existing technologies all focus on the adjustment of a single air bag, that is, first calculating a single part of the human body where pressure injury may occur, and then adjusting the internal air bag pressure of the single air bag corresponding to that part. However, no matter how precise the damage location is analyzed with this method, the relative method it can deal with is still simply adjusting the internal air pressure of the corresponding single air bag, which cannot effectively adjust the relative risk parts. means.

To sum up, there is an urgent need in related industries to develop a new method and system that redistributes body pressure distribution through a support device so as to reduce or even eliminate the risk of pressure injuries to the user's body.

Different from the traditional method of directly inflating and deflating air bags, when controlling the pressure distribution on the human body, the interaction between all the pressure distribution of the human body on the air bed and the air bags in each zone should be correctly controlled. influence, make overall considerations and calculations, and understand how to redistribute and combine the internal gas pressures of all partition air bags, so that the reaction pressure on the human body lying down can be redistributed evenly or achieve other expected distribution forms to eliminate Ambulatory patients are at risk for epidermal pressure injury. One object of the present invention is to provide a method for a support device to redistribute body pressure distribution: first, when the user is supported by a support device, such as when sitting or lying on a mattress, most of the pressure sensation in the support device is used The detector measures and generates a two-dimensional pressure distribution corresponding to the pressure exerted by the human body on the support device (or the pressure experienced by the human body due to contact with the support device). Then, the two-dimensional pressure distribution is analyzed to deduce the user's current body posture. That is, the measured pressure distribution is used to deduce how the skeletal muscles of the user's body are distributed on the support device, and the characteristics of the pressure distribution are calculated. Parameters can interpret the user's current posture. Then, analyze the body posture and calibrate the position of one or more bony protrusions of the user's body on the support device. That is, it is not to find the one or more places where the user's body is subject to greater pressure, but to Identify one or more areas of the user's body that are more susceptible to injury due to sustained or sudden high pressure. Next, determine whether the probability of occurrence of pressure injury corresponding to one or more bony protrusions is acceptable. For example, whether the probability of occurrence is less than or equal to a common critical probability value for all bony protrusions, or less than one of the individual bony protrusions. The critical probability value is acceptable if the above conditions are met. If all are acceptable, no further processing will be performed. If not, the support force generated by one or more support units must be adjusted cyclically until all bony protrusions correspond to the critical probability value. The probability of occurrence of pressure injury is acceptable.

Obviously, the main difference between the method of redistributing body pressure distribution by a support device proposed by the present invention and the existing method of improving bedsores is that the method proposed by the present invention first finds one or more bony protrusions on the user's body. One or more specific positions on the support device, and adjust the different support forces exerted by the support device on different parts of the user's body as necessary, so as to reduce the pressure on the user's body at this or multiple bony protrusions, thereby reducing or and even eliminate the possibility of pressure injuries occurring at these bony prominences. Probability. In other words, how to find the location of the bony prominence, how to determine the probability of pressure injury at the bony prominence, and how to adjust the different supporting forces exerted by the support device on different parts of the user's body to reduce or even eliminate the bony prominence. The probability of pressure injury is a major feature of the method proposed in this invention.

Another object of the present invention is to reduce and eliminate pressure injuries that are prone to occur at bony protrusions and adjust the pressure on various parts of the user's body, that is, to propose a method to redistribute the body pressure distribution on the support device. Compared with existing commercial products and existing technology research and development, the method focuses on bedsores that are prone to occur in places where the body is under greater pressure and directly reduces the pressure on the body where the pressure is greater. The technical feature of the present invention is to first find out the pressure on the body. The overall two-dimensional pressure distribution on the body surface. Then, after determining the body posture of the user's body on the support device, we can then find out the position of the bony protrusions of the human body on the support device. It is also necessary to determine what is happening at each bony prominence. After determining the probability of pressure injury, it is determined how to adjust the pressure exerted by the support device on the user's body to reduce the probability of pressure injury at each bony prominence. That is to say, starting from when the user is sitting, lying or lying on a support device such as an air mattress, how to measure the pressure generated by the mutual contact between the user's body and the support device, how to generate a two-dimensional pressure distribution relative to the user's body, And how to generate the user's body posture from the two-dimensional pressure distribution, etc. can be the same as existing products/technologies. However, existing products/techniques directly identify one or more parts of the user's body that are subject to greater pressure from the user's body posture, and directly adjust the pressure exerted by the support device on this or multiple parts. However, the present invention is to find out one or more bony protrusions of the user's body from the user's body posture, and adjust the support force exerted by the support device on the user's body to adjust and reduce the pressure on the one or more bony protrusions. and the probability of pressure injury, that is, redistributing the corresponding pressure to various parts of the entire body pressure distribution. Then, the new overall two-dimensional pressure distribution on the body surface is re-corresponded. If the optimized two-dimensional pressure distribution is not reached, the above steps are repeated until the optimized two-dimensional pressure distribution is achieved, where , each air bag in the air bag group will also be continuously adjusted to the optimal pressure configuration.

Another object of the present invention is to provide a method for a support device to redistribute body pressure distribution, 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) ), from the above comparison of machine learning and big data, we can get the lying posture and the coordinate positions of each bony protrusion point. From the lying posture, we can get which points will be compressed (lying upright and lying on the side are different), according to the pressure The characteristics of the image and the lying posture can be used to calibrate the coordinate position of a specific bony prominence, compare it with the clinical database, and calculate the proportion of coordinate pressure at the dangerous part of the bony prominence that needs to be reduced to be safe, and then convert it back to what shape, softness, and hardness the support unit should have. It can meet the pressure redistribution pattern, drive the support device and feed back the pressure distribution at the same time, and operate repeatedly until the target pressure is met.

300: Improving Pressure Injury Systems

301:Support device

3011:Support unit

3012: Pressure sensor

3013:Interface module

302:Control device

309:User body

410, 420, 430, 440, 450: step blocks

Figure 1A is a schematic diagram of human body posture and corresponding bony protrusions.

Figure 1B and Figure 1C are schematic diagrams of the relationship between the pressure distribution of the human body and the pressure equalization inside the airbag.

2A to 2D are schematic diagrams of a method for redistributing body pressure distribution by a support device according to the present invention.

3A and 3B are schematic diagrams of the system architecture of a method for redistributing body pressure distribution by a support device according to the present invention.

Figure 4 is a basic flow chart of a method for redistributing body pressure distribution by a support device proposed by the present invention.

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

The basic concept of a method for redistributing body pressure distribution by a support device proposed by the present invention is shown in Figures 2A to 2D. First, as shown in Figure 2A, when the user's body is located on the support device, the two-dimensional pressure distribution corresponding to the user's body posture is obtained by measuring the pressure on different parts of the support device. The figure shown here is used For example, if a user is lying down or on his side on a support device, it can be seen that there will be greater pressure on the parts corresponding to the user's shoulders and buttocks. Then, the user's body posture is estimated based on this two-dimensional pressure distribution. Generally speaking, artificial intelligence can be used to perform the estimation, so as to use artificial intelligence Huge computing power and the ability to learn more and more accurately. Then, as shown in Figure 2B, the positions of the bony protrusions where the user's body meets the support device are calibrated based on the calculated user's body posture. Here, the user's body posture is shown as lying upright or on the side. Take lying down as an example and mark the bony protrusions with a cross shape. The reason why body posture needs to be identified first is that the bony protrusions in contact between the user's body and the support device are not exactly the same in different body postures. For example, when lying on the side, the user's coccyx (tail vertebra) cannot be in direct contact with the support device. When lying down, the user's hip bone cannot be in direct contact with the support device. After the body posture is identified, it is necessary to calculate which bony protrusions will connect with the support device to determine the coordinates of these bony protrusions on the support device (for example, calibrate based on the outer contour and internal undulation characteristics ).

As shown in Figure 2C, the part of the user's body that is subject to greater pressure is not necessarily the bony protrusion of the user's body (triangular mark), although the two are often adjacent to each other. As shown in Figure 2D, along the straight line A-A running through the middle of the human body from head to tail, different parts of the human body receive different amounts of pressure, but one or more parts will always bear a pressure that is no less than this critical pressure value. From It can be clearly understood from the picture that the pelvis will directly correspond to the point where the critical pressure is greater (high-risk area pressure), but there are also more muscles and fat here to buffer and disperse the pressure, so the pressure peaks are not absolutely the same. In actual strain areas, this is a safe zone. In contrast, a certain segment of the spine that directly bears pressure like a skin and bones (for example, Sacrum Suffering) has a lower critical pressure and becomes a relative danger zone. If the pressure is continuously accumulated for more than three hours, tissue abnormalities will occur. The varying pressure is used as the critical pressure value for inducing pressure ulcers. The critical pressure for pressure injury is related to body shape, posture, and health status, and can be defined from clinical research data or pressure injury literature data. It must be noted that previous technologies all use inference to directly preset the location of the pressure peak as the strained area, and then directly adjust the air pressure in the air bag where the pressure peak is located, resulting in the fact that it is still unable to effectively alleviate the damage to the actual strained area. Therefore, the present invention proposes that when the user's body weight is fixed, the pressure on different parts of the human body can be adjusted to reduce or even eliminate any stress on the human body. The probability that a part will bear a pressure higher than this critical pressure value, that is, undergo pressure reconfiguration. Since the user's body weight is constant, reducing the pressure in one part will inevitably increase the pressure in other parts. Therefore, a major principle when adjusting the pressure on various parts of the human body is to make the human body prone to pressure injuries after adjustment. The pressure on one or more parts of the human body is less than this critical pressure value. After adjustment, it is better to make the pressure on any part of the human body less than this critical pressure value, instead of just reducing it after adjustment from being greater than this before adjustment. The critical pressure value is just for each part of the human body. In addition, when actually adjusting each support unit (such as airbags) to adjust the pressure on various parts of the user's body, it is generally necessary to minimize the number of support units that need to be adjusted (such as the number of airbags whose inflation levels are adjusted). .

The basic system architecture of the method for redistributing body pressure distribution by a support device proposed by the present invention is shown in Figures 3A to 3B. The improved pressure injury system 300 thus includes at least a support device 301 and a control device 302 , and the support device 301 at least includes a plurality of support units 3011 , a plurality of pressure sensors 3012 and an interface module 3013 . These support units 3011 are located inside the support device 301 and are arranged in a two-dimensional array (first two-dimensional array), and can generate the same or different support forces respectively. These pressure sensors 3012 are located between the support units 3011 and the specific side of the support device 301 used to contact the user's body (or to support the user's body), and are arranged with each other to form a two-dimensional structure located inside the support device 301 Array (the second two-dimensional array). Thereby, these support units 3011 can respectively generate support forces to support the user's body who is sitting, lying or lying on a specific side of the support device 301, and the pressure sensor 3012 can sense the user's body located on the specific side. The pressure on each part produces a two-dimensional pressure distribution corresponding to the user's body posture. The interface module 3013 is connected to the support unit 3011 and the pressure sensor 3012 respectively to transmit information for adjusting the support force generated by one or more support units 3011, and to receive the information measured by the one or more pressure sensors 3012. The pressure value from this specific side (that is, the pressure value between the user's body and the support device). The interface module 3013 is connected to the control device 302, and through the control device 302 The support force generated by the support unit 3011 is adjusted according to the measurement results of the pressure sensor 3012, thereby adjusting the pressure on different parts of the entire user's body located on a specific side. The control device 302 can analyze the two-dimensional pressure distribution and thereby calculate 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. The control device 302 generates pressure on at least one bony protrusion. When the probability of injury is unacceptable, the at least one support force generated by at least one support unit is cyclically adjusted until the probability of pressure injury occurring at one or more bony protrusions where the user's body and the support device contact each other is acceptable.

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 program (App) for interacting with the support device 301, such as a smart phone, a tablet, a notebook computer, a desktop computer, etc., and the interface module 3013 can It is any wired or wireless communication module, such as 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 bodies, or they can be two hardware bodies integrated together. For example, one control device 302 corresponds to multiple support devices 301 to simplify simultaneous operation. Care for multiple installations.

The system proposed by the present invention for a support device to redistribute body pressure distribution has the following commonly used options, because the present invention is aimed at adjusting the pressure on the bony protrusions of the human body to reduce and eliminate the probability of pressure injuries at the bony protrusions. , and as shown in Figure 1B above, the area of any human bony prominence is often not much different from the size of a coin. Therefore, in order to accurately locate the position of each bony protrusion on the supporting device 301, the distance between adjacent pressure sensors 3012 often cannot be several integer multiples of the coin size. Some test results show that adjacent pressure sensors 3012 can be The distance between the pressure sensors should be kept less than three centimeters, such as the distance between the edges of each other is less than three centimeters, or the distance between the centers of each other is less than three centimeters. The support unit 3011 can adjust the supporting force generated by the air bag by adjusting its inflation degree, considering the air bag and the pressure sensor 3012 In terms of both sizes, the distribution density 3012 of these pressure sensors is usually higher than the distribution density of these support units 3011. A plurality of airbags that are smaller in size and more densely arranged with each other can also 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 on a specific side of the support device 301 when the user is in contact with the support device 301, due to how the user will The part of the body posture appearing on a specific side of the support device 301 can be changed at any time. Therefore, the pressure sensors 3012 are often arranged in a two-dimensional array (the first two-dimensional array) with each other, and the support units 3011 are usually arranged with each other. Arranged into another two-dimensional array (the second two-dimensional array), the different pressures caused by different parts of the user's body on a specific side of the support device 301 can be completely and accurately measured.

In addition, each support unit 3011 can change the support force it generates to change the different pressures it causes on different parts of the user's body. And since the outline of the human body is not like a rectangular parallelepiped with only straight edges, when the user's body is When supported by a plurality of support units 3011, different support units 3011 that contact different parts of the user's body 309 often have different adjustable contours to appropriately support the user's body and adjust the support force exerted on the user's body. That is, the support unit 3011 can adjust its vertical height, hardness, or even its horizontal size, and by changing the amount or flow rate of fluids such as gas or liquid flowing through the interior, the support unit 3011 can change the supporting force and force generated by it. /or size outline. Since the support device 301 is used to reduce the damage caused by excessive and/or prolonged pressure on the user's body, the support unit 3011 will have already generated respective support forces (whether they are the same) before the user is located on this specific side. or different). Before the user's body is supported by the support device 301, a plurality of air bags serving as these support units 3011 have been inflated to different heights to properly support the user's body and reduce the user's discomfort. In addition, the surface of the specific side is covered with a soft or deformable material to reduce the pressure on the user's body when the user's body comes into contact with the specific side.

The control device 302 may have built-in artificial intelligence for processing information from the pressure sensor 3012 and adjusting the support force generated by the support unit 3011. The control device 302 can use artificial intelligence to perform the method of improving pressure injuries proposed by the present invention, thereby using various databases, various reference information, and tests performed one by one to continuously optimize the artificial intelligence and become more and more accurate. Correctly improve pressure injuries. The control device 302 can use artificial intelligence to analyze the two-dimensional pressure distribution measured by these pressure sensors 3012 and deduce the body posture of the user on the support device 301. It can also use artificial intelligence to calibrate the body according to the user's body posture. The position of one or more bony protrusions on a specific side of the support device 301 . The control device can use artificial intelligence to determine the probability of pressure injury at each bony prominence, or when the probability of pressure injury at at least one bony prominence is unacceptable, such as when it is greater than a critical probability value common to all bony protrusions. or are respectively greater than the respective critical probability values at each bony prominence, the support force generated by at least one support unit 3011 is cyclically adjusted until the probability of pressure injury occurring at all bony protrusions is acceptable. Or the artificial intelligence can be trained by referring to the relationship between the body posture and the position of one or more bony protrusions obtained by other methods, or it can be trained by referring to the improvement results of adjusting one or more support units for pressure injuries. This artificial intelligence.

As shown in Figure 4, the present invention proposes a basic flow chart of a system for a support device to redistribute body pressure distribution: First, as shown in step block 410, a support device is provided, and the support device has a plurality of support units and a plurality of pressure sensors. The support units can generate respective support forces respectively and are arranged in a first two-dimensional array with each other, and these pressure sensors are located between the support units and a specific side of the support device and are arranged with each other in a second two-dimensional array. dimensional array. Next, as shown in step block 420, when the user is supported on this specific side, the pressure sensor measures and generates a two-dimensional pressure distribution. Next, as shown in step block 430, the two-dimensional pressure distribution is analyzed to derive the user's body posture. Then, as shown in step block 440, the user's body posture is analyzed, and each of the one or more bony protrusions of the user's body is calibrated. from the position of this support device. Finally, as shown in step block 450, it is determined whether the pressure injury occurrence probabilities corresponding to all bony protrusions are acceptable, for example, they are lower than the common critical probability value of all bony protrusions or less than the respective critical probability values of each bony protrusion. If the probability value is yes, then stop adjusting the support force generated by these support units. If not, adjust the support force generated by one or more support units cyclically until the corresponding pressure injury probability at all bony protrusions is acceptable. In other words, when the user is supported by the support device, a two-dimensional pressure distribution between the user's body and the specific side of the support device is measured, and then the two-dimensional pressure distribution is analyzed to find the direct relationship between the user's body and the specific side of the support device. one or more bony protrusions in contact (especially the respective positions of each bony protrusion on a specific side of the support device), and finally adjust the different support forces exerted by the support device on different parts of the user's body until the user's body is in contact with the support device The pressure at each bony prominence in direct contact with a specific side is reduced to an acceptable range.

Obviously, the mainstream commercial approach is to directly reduce the pressure on the places where the user's body is subject to greater pressure. The specific content of step blocks 410 and 420 of the present invention is to calibrate the pressure distribution on various parts of the user's body. The position of one or more bony protrusions between the user's body and the support device requires a two-dimensional pressure distribution corresponding to the support force applied to the user's body from a specific side of the support device. Moreover, the commercial method directly adjusts the pressure on certain parts. The present invention needs to process the two-dimensional pressure distribution as shown in step block 430 to step block 450 to obtain the overall bony protrusion position, and at the same time reduce the Adjustments related to the chance of pressure injuries occurring at these bony prominences.

In step block 430, there are two options for analyzing the two-dimensional pressure distribution to deduce the user's body posture: Option one is to analyze the two-dimensional pressure distribution and deduce the user's body posture with reference to the user's physiological information. The stress on the protrusion is usually not the point where the user's body receives the greatest force. The two-dimensional pressure distribution can only show the amount of pressure on each position on a specific side of the support device, and cannot directly display the position of each bony prominence. Therefore, it is necessary to correspond to the user's body according to the specific details of the user's body. The two-dimensional pressure distribution of the body is calculated, and the user's body posture on the support device is deduced, such as lying, lying down, sitting, lying upright, lying on the side, prone, limbs spread in a large shape, hands on the chest, legs Straighten, put your hands under your head, sit cross-legged, kneel, sit on all fours, lie down, prone, side-lying, hands and feet crossed, and various body postures. For example, the part of the two-dimensional pressure distribution corresponding to the prosthetic limb or assistive device can be excluded based on whether the user has prosthetic limbs or assistive devices and their size outline. Therefore, part of the two-dimensional pressure distribution does not correspond to any part of the user's body. bony prominence. It can also be used to reduce the possibility of treatment according to the user's disability status, such as missing limbs, in the process of analyzing which body posture the two-dimensional pressure distribution may correspond to. If the user is missing an arm and does not have a prosthetic limb, There is no need to consider the body position in which both hands are in contact with a specific side of the support. Furthermore, it can also be based on the user's body shape and the user's disease status, such as whether the user is fat around the waist, abdomen, thighs, hips or limbs, or whether the user has edema, sarcoma, fractures, bone curvature or joint stiffness and other diseases and the extent of the disease. , when analyzing the body posture corresponding to the two-dimensional pressure distribution, it is more efficient to locate the parts of the bones corresponding to the body posture in the two-dimensional pressure distribution.

On the other hand, the user's height, limb length, and weight are basic user physiological information, which can be used to determine whether the parts with higher pressure in the two-dimensional pressure distribution should correspond to the same user's body and exclude those with the user. A signal of being too heavy or too light that is independent of the body (at least independent of the position of the user's bones). Alternatively, another option is to analyze the two-dimensional pressure distribution and derive the body posture with reference to a database model, where the database model contains a plurality of two-dimensional pressure distributions generated by previous tests and a verified corresponding majority. body posture. In other words, by comparing with a large amount of data, you can find a previous two-dimensional pressure distribution that is closest to the current two-dimensional pressure distribution (or find some previous two-dimensional pressure distributions that are quite close), and then use the corresponding The previous body posture of the previous two-dimensional pressure distribution (or when these previous two-dimensional pressure distributions all correspond to a certain previous body posture) or directly as the current body posture The posture may be used as a starting point to estimate the current body posture. Obviously, the former option can accurately deduce the user's body posture based on their personal conditions, while the latter option can quickly deduce their body posture.

In step block 440, there are four commonly used options for how to analyze the user's body posture to determine the respective positions of one or more bony protrusions of the user's body on the support device. One method is to first calibrate one or more body parts based on body posture and two-dimensional pressure distribution, and then calibrate the position of one or more bony protrusions on the support device based on the user's physiological information. For example, first determine which parts of the body have the larger pressure parts in the two-dimensional pressure distribution that correspond to this body posture, and then determine one or more bones in each body part based on various information related to the user's body. The respective positions of the protrusions in each high-pressure part. For example, when the body posture is lying on the back, first determine which parts of the head, shoulders, hips or limb joints correspond to the greater pressure, and then judge the user's body based on the general human body structure such that the occipital bone is approximately in the middle of the head when lying on the back. The bony protrusions such as the occipital bone are at the specific location of the support device.

Another method is to first analyze the body posture to estimate the position of the body's skeletal muscles on the support device, and then perform graphic calculations to calibrate the position of one or more bony protrusions on the support device. That is, after obtaining the user's body posture, the distribution status of each bone and muscle in the user's body in this body posture is first determined based on the general human body structure or even the user's physiological information, and then based on the two-dimensional The pressure distribution is converted to correspond to the position on the support device, and finally the position of each bony protrusion on the support device is calibrated from the position of the bone on the support device based on the general human body structure or the user's physiological information.

It is also possible to first introduce information on which bony protrusions of the body are prone to pressure trauma in different body postures based on the results of one or more clinical studies, and then calibrate one or more bony protrusions based on the user's body posture and the two-dimensional pressure distribution. in the position of this support device. For example, thousands of experimental results show that pressure trauma is particularly likely to occur in a semi-recumbent position with an upper body tilt angle of 66 degrees. For the ischium, when the user's body posture is a semi-recumbent position with an upper body tilt angle of 66 degrees, the position of the ischium of the user's body on the support device is calibrated only from the two-dimensional pressure distribution and the user's body posture.

Another option is to first convert the user's three-dimensional human body structure into a two-dimensional projection on the plane where these pressure sensors are located based on the user's body posture and the user's physiological information, and then compare this two-dimensional pressure distribution with each other. The position of one or more bony protrusions on the supporting device is then calibrated. For example, first determine how the user's body with such a body posture will be distributed in the three-dimensional space based on the specific details of the user's body, and then project it onto the support device to obtain a two-dimensional projection parallel to the plane where these pressure sensors are located. , then first find three reference points in the skeletal part of the two-dimensional projection and calibrate their coordinates (because the three points form a plane), and then connect these reference points to generate a datum plane and a datum line, and the body posture will be related to the support Each bony prominence point in direct contact with the device is gradually converted to coordinates relative to these three reference points, and the coordinates of each bony prominence on the supporting device are obtained.

In step block 450, there are two options for how to adjust one or more support forces produced by all support units according to the occurrence probability of pressure injuries 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 occurrence of pressure injury at each bony protrusion and generate a decompression strategy sorted according to the probability of occurrence, and then adjust the results of one or more support units separately in a loop. And apply one or more supporting forces on different parts of the user's body until the probability of occurrence of pressure injury corresponding to all bony protrusions is acceptable, for example, they are less than the critical probability value common to all bony protrusions or individually smaller than these bones. The respective critical probability values of the protrusions. That is, after finding the position 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 prominence divided by the area of the bony protrusion). Then, based on the results of previous medical research, we can judge the probability of pressure injury at each bony protrusion under the influence of factors such as pressure and contour shape, and then according to the probability of pressure injury. Shun Starting from the bony prominences that are most susceptible to pressure injury, gradually reduce the probability of pressure injury until all bony protrusions have an acceptable probability of pressure injury.

Another option is to adjust the support force generated by one or more support units after identifying one or more bony protrusions. If the probability of pressure injury corresponding to all bony protrusions cannot be achieved, it is acceptable. , such as being less than the common critical probability value of all bony protrusions or individually smaller than the respective critical probability values of these bony protrusions, then the pressure generated by one or more support units and applied to different parts of the user's body is again adjusted. or more support until the probability of pressure injury corresponding to all bony prominences is acceptable. That is, a trial and error method 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 Find a configuration of support units that gives an acceptable probability of pressure injury to all bony prominences.

In step block 450, one or more support forces generated by all support units are adjusted according to the occurrence probability of pressure injuries at each bony protrusion to reduce or eliminate pressure injuries at all bony protrusions. There are four options: One option is to first identify one or more bony protrusions at a specific bony prominence that has the highest probability of occurrence of pressure injury, and then adjust the support force generated by one or more support units until the corresponding bony prominence. The probability of occurrence of pressure injury is less than this critical probability value, and then the cycle is continued in sequence according to the probability of occurrence of pressure injury corresponding to one or more other bony protrusions that have not yet been treated, until the probability of occurrence of pressure injury corresponding to all bony protrusions is less than This critical probability value. That is, whether it is greater than the critical probability value is used as a criterion to determine the risk of pressure injury at each bony protrusion and as a criterion to determine whether the support force exerted by the support unit has been adjusted to an acceptable standard, and from the bony protrusion with the highest risk Start treatment at each bony prominence and reduce the probability of pressure trauma at each bony prominence one by one until it is below the acceptable critical probability value.

Option 2: When there are M bony protrusions whose positions correspond to pressure injuries that have a higher probability of occurrence, only the N bony protrusions whose positions correspond to a higher probability of pressure injuries will be adjusted by adjusting one or more supports. The pressure generated by the unit causes the probability of occurrence of pressure injury corresponding to the position of these N bony protrusions to be less than this critical probability value, where M and N are both positive integers and M is greater than N. This is because some completed tests have found that in various human postures, pressure injuries are more likely to occur or are more severe in certain bony protrusions, while pressure injuries may also occur in other bony protrusions. The probability of occurrence and severity of occurrence are obviously low. Therefore, when adjusting, as long as the adjustments are made to a few bony protrusions where pressure injuries occur, the pressure on other bony protrusions that have not been adjusted can basically be adjusted incidentally. The probability of sexual injury is also reduced to no more than this critical probability value.

Option 3: When there are M bony protrusions with a corresponding probability of pressure injury greater than zero, the decompression strategy when adjusting the pressure generated by one or more support units is to maximize the probability of pressure injury corresponding to their location. Reduce _the pressure at _a certain bony prominence by The pressure at the lowest bony prominence is reduced _by X _M %, where X ₁ , _{X 2 ,} and _up to X _M are all greater than zero _, and _XM .

Option 4: When there are M bony protrusions with a probability of pressure injury corresponding to their position greater than this critical probability value, the decompression strategy when adjusting the pressure generated by one or more support units is to adjust their position corresponding to the occurrence of pressure injury. _The pressure at the bony prominence with _the highest probability of occurrence is reduced by The pressure at a certain bony prominence with the _Nth highest _probability of injury is reduced by X ₂ , until X _N is greater than zero and X ₁ is greater than or equal to X ₂ , X ₂ is greater than or equal to X ₃ , and so on until X _N-1 is 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 changes of the previous option, which simplifies the repeated testing of various possible configurations of these support units, but directly reduces the probability of pressure injuries at multiple bony protrusions in proportion. The pressure on each of these bony protrusions is greater, and the greater the probability of pressure injury, the greater the proportion of the pressure will be reduced, so that the pressure on the bony protrusions can be adjusted to reduce the probability of pressure injury. Of course, this adjustment method is also based on the rules of thumb obtained from numerous previous tests, and each variable M, N, X ₁ , X ₂ ..X _N ..X _M is an adjustable variable.

Since existing commercial products can only reduce the pressure at the place where the pressure is greater (or reduce the support force generated by the support unit corresponding to the place), but in the present invention, in order to reduce a certain bony protrusion, It will not excessively increase the probability of pressure injury at other bony protrusions. It is the support force generated by adjusting one or more support units at the same time (or at the same time adjusting one or more of the user's body). pressure on multiple parts), thereby simultaneously keeping the probability of pressure injury at one or more bony protrusions below a common critical probability value or the respective critical probability value at each bony prominence. That is to say, even if the probability value of pressure injury at only one and a single bony prominence is greater than the acceptable critical probability value, the adjustment does not necessarily only involve adjusting the one or more support units closest to this bony prominence. The support force exerted by the bony protrusion may still be adjusted to the support force exerted by one or more support units further away from this bony prominence. After all, on the premise that the weight of the user's body remains unchanged (even on the premise that the total weight of the user's clothing, etc. remains unchanged), the redistribution of the different support forces exerted by each support unit must be considered. This is to avoid the situation that when the pressure on one bony prominence is reduced to an acceptable level, the pressure on another bony prominence is increased to an unacceptable level.

In addition, in step block 450, the final need to adjust the support units to the expected configuration can be obtained through computer simulation calculations and then the support units can be adjusted accordingly, or through continuous actual practice. Adjust the configuration values of these support units to obtain the required configuration of these support units. Both approaches are possible within the spirit of the present invention. In particular, many previous tests have found that in general medical applications, it often only takes less than five adjustments to achieve an acceptable level of pressure injury at all bony protrusions. The configuration method of how much support force each support unit should exert. Therefore, using computer simulation or actual adjustment, the final required results can be quickly achieved, and the process will not cause non-negligible side effects on the user's body. 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 injury corresponding to all bony protrusions less than this critical probability value, and then adjust the two-dimensional support force distribution based on this specific value. The dimensional support force distribution actually adjusts the support force generated by one or more support units, and another option is to obtain a specific adjustment process that can make the probability of pressure injury corresponding to all bony protrusions less than this critical probability value. The two-dimensional support force distribution is the support force generated by the actual adjustment of these support units. Therefore, when this specific adjusted two-dimensional support force distribution is obtained, the support forces generated by these support units have been adjusted.

The method for redistributing body pressure distribution by a support device of the present invention can also use artificial intelligence to perform step 430, step 440 and/or step 450. For example, an artificial intelligence is used to analyze the two-dimensional pressure distribution to calculate the user's body posture, and the two-dimensional pressure distribution and the user's body posture obtained by it are compared with the two-dimensional pressure distribution and the user's body obtained by other methods. The comparison results of postures are used to train this artificial intelligence. Or use an artificial intelligence to analyze the body posture to calibrate the position of one or more bony protrusions of the user's body on the support device, and use the obtained one or more bony protrusions to compare with those obtained by other methods. The artificial intelligence is trained by comparing the positions of one or more bony protrusions. For example, an artificial intelligence is used to determine whether the probability of occurrence of pressure injury corresponding to all bony protrusions is not greater than a critical probability value and to determine how to adjust the support force generated by one or more support units so that all The probability of occurrence of pressure injury corresponding to the bony protrusion is not greater than this critical probability, and the artificial intelligence is trained through the improvement of the pressure injury through the adjustment results of one or more support units.

Above, you can use artificial intelligence to execute any of the step blocks and compare the results obtained by artificial intelligence with the results obtained by other methods; or by using artificial intelligence to execute these three step blocks and compare the pressure obtained by artificial intelligence. The damage chance is compared with the unadjusted pressure damage chance to further adjust and optimize the artificial intelligence used. For example, when the corresponding relationships between various human body postures and various dangerous bony protrusions are classified into several groups of correspondences after accumulating a large number of cases, the human body postures obtained through artificial intelligence processing can be directly compared with these accumulated Cases are compared with each other to obtain the possible dangerous bony protrusions. The corresponding relationship can also be fed back and corrected by combining the human body shape based on the human body shape and the possible dangerous bony protrusions calibrated using artificial intelligence.

As mentioned above, embodiments of the present invention provide a method for a support device to redistribute body pressure distribution, which includes the following steps: first, a support device is provided to support a human body lying down. The support device has a plurality of support units and a plurality of A pressure sensing unit, a plurality of the pressure sensors are located between a plurality of the support units and a lying human body, and the plurality of the pressure sensors are used for continuous monitoring during the adjustment process, the plurality of the support units A plurality of the pressure sensors are arranged into a group or a plurality of groups of two-dimensional arrays, and different support units can generate respective supporting forces respectively, and a plurality of the pressure sensors are arranged into a group or a plurality of groups of two-dimensional arrays, Among them, the initial internal average pressure of multiple support units is a specific saturated internal air pressure. This specific saturated internal air pressure can be measured using a specific value measured by a Shaw hardness tester as a benchmark, and the two-dimensional here refers to the support In the X and Y axis directions formed by the plane where the units are distributed, 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 edges of at least two pressure sensors is less than three centimeters. The distance between the centers of the detectors is less than three centimeters. And at least one support unit can adjust at least one of the following; horizontal size, vertical size and softness and hardness, wherein at least one support unit can change the support force generated by changing the fluid inside it, and at least one support unit can change the support force generated by it through Changing the fluid inside changes its size and profile.

When the human body surface contacts and exerts pressure on the surface of a specific side of the support device, a plurality of the pressure sensors perform a pressure distribution measurement step to scan the lying pressure image of the human body and measure the body pressure of the lying human body. The pressure on the support device generates a two-dimensional pressure distribution, where the above-mentioned two-dimensional pressure distribution refers to the vertical pressure caused by the force of the body located at the two-dimensional coordinate position in the direction perpendicular to the plane. Next, interpret and analyze the two-dimensional pressure distribution and generate at least one characteristic parameter, wherein the above-mentioned characteristic parameters further include the boundary shape, the number and configuration of the regional center of gravity, the local peak point of the pressure, the size configuration of the connecting line between the center of gravity and the peak value, and the estimated structure. Body proportions, and this body condition parameter also includes body measurements, height, weight, and special factors. Then, a lying posture comparison step is performed based on the characteristic parameters and the body shape factor to compare and identify a lying posture. The body shape factor includes height, weight, waist circumference, limb defects, etc., and the body shape factor can also be taken from clinical practice. data database, and the lying posture comparison step is an artificial intelligence comparison learning to calculate the user's lying posture on the support device, and classify it into lying on the back, lying on the left side, lying on the right side, There are various classifications such as sleeping on the stomach and whether hands and feet are crossed, and all steps can be compared, judged, analyzed and automatically controlled through machine learning and big data through artificial intelligence. Then, a bony prominence coordinate calibration step is performed 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 calibrate at least one bony prominence of the body of the lying human body. , and the coordinates of the bony protrusion that the bony protrusion presses on the supporting device. Secondly, a pressure injury probability determination step is performed to detect a local peak pressure corresponding to the bony protrusion coordinates, and simultaneously determine the pressure injury occurrence probability of at least one bony protrusion point, and generate a pressure injury probability for each bony protrusion point respectively. A risk degree, wherein the higher the risk degree, the higher the local peak pressure of the bony protrusion point, which means the higher the probability of pressure injury. The above-mentioned step of judging the probability of pressure injury is based on a clinical research data The type of patient in the database is used to determine whether the support pressure is adequate. It is easy to cause pressure injury, and after calculating the probability of occurrence of pressure injury at multiple bony protrusions, the risk will be generated for the probability of occurrence of pressure injury at multiple bony protrusions, and the risk will be ranked accordingly.

Then, perform a risk ranking step based on the risk to generate a risk ranking for the probability of occurrence of pressure injury at at least one bony protrusion point, and recalculate the support assigned to at least one bony prominence coordinate based on the risk ranking. force, and generates a redistribution model parameter, so as to redistribute the supporting force required by each support unit of the two-dimensional array of the complex group at the same time. After that, a pneumatic configuration is generated by the redistribution model parameters to perform a redistribution process of the integrated pressure distribution, and the individual shape and hardness of the support unit located at the high-risk location of pressure injury are driven and adjusted according to the pneumatic configuration. Among them, the air pressure configuration includes all the air pressure data that need to be controlled by the support unit located at the bony protrusion point with the risk level, so as to redistribute the support pressure borne by the support unit when the human body lies on the support device. , and reduce the local peak pressure corresponding to the high-risk part of pressure injury.

In addition, before performing the redistribution process of the body pressure distribution, a pressure reduction process is first performed according to a pressure reduction percentage and/or a pressure reduction value to first 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, where the pressure reduction percentage is the The pressure reduction ratio of the previously saturated internal 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 the pressure corresponding to the high-risk part of pressure injury, If the local peak pressure fails to reduce the occurrence probability of pressure injury at each bony protrusion point below a predetermined critical probability value, the human body lying pressure image must be scanned cyclically and batch adjusted by the updated two-dimensional pressure distribution. The model parameters are redistributed until the two-dimensional pressure distribution shows that the probability of occurrence of pressure injury at each bony protrusion point is lower than the critical probability value. If it is not lower than the critical probability value, the process of risk reduction steps is repeated. , until the risk is reduced to the critical probability value.

The pressure distribution adjustment method of the present invention is completely different from the method of adjusting a single air bag currently used on the market. The support device proposed by the present invention redistributes the body pressure distribution method and system to find the optimal overall pressure distribution image. , based on which the corresponding overall airbag pressure composition is adjusted, rather than finding a single pressure point and adjusting a single airbag technology. The purpose of the support device redistributing the body pressure distribution system proposed by the present invention is to reduce the surface pressure of the air bag at the easily injured parts of the body surface, rather than the internal pressure of the air bag. The purpose of adjusting the internal pressure of the air bag is only to change the distribution mode of the support force, so as to use the lowest pressure. The number of air bags can adjust the body surface pressure at the maximum coordinate position. As shown in Figure 5A, lowering the pressure of the P4 air bag will increase the pressure of the P3 and P5 air bags. In addition, the internal pressure of each air bag will affect the softness, hardness and height shape of the mattress in each area. Therefore, the combination of several air bags with different internal pressures will cause different body support to the body pressure distribution of the sleeper. In the pressure distribution image (outside of the air bag), if there are more parts, there will be fewer parts, because the total weight remains unchanged. The present invention can correspond to different pressure distribution images outside the airbag according to various pressure distribution methods inside the airbag to find the optimal overall pressure distribution method to avoid pressure ulcers. As shown in Figure 5B, the present invention will continue to operate. air bag, and simultaneously scan the overall pressure image (initially as the pressure distribution image on the far left), and then perform synchronous calculations and feedback control to continuously optimize the surface pressure, and finally obtain an optimized pressure distribution image (as the pressure distribution image on the far right) ).

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Claims (10)

A method for a support device to redistribute body pressure distribution, including: providing a support device to support a human body lying down. The support device has a plurality of support units and a plurality of pressure sensing units, and the plurality of pressure sensing units are located at a plurality of Between the support unit and a lying human body, a plurality of the pressure sensing units are continuously monitored during the adjustment process. The plurality of support units are arranged into a group or a plurality of groups of two-dimensional arrays, and different The support unit can generate its own support force respectively, and the plurality of pressure sensors are arranged with each other to form a group or a plurality of groups of two-dimensional arrays, wherein the initial internal pressure equalization of the plurality of support units is a specific saturation Internal air pressure, and the two dimensions here refer to the X and Y axis directions formed by the distribution plane of the support unit; when the human body surface contacts and exerts pressure on the surface of a specific side of the support device, a plurality of such pressures The sensor performs a pressure distribution measurement step to scan the lying pressure image of the human body, and measures the pressure of the lying human body on the support device, and generates a two-dimensional pressure distribution, wherein the above-mentioned two-dimensional pressure distribution is Refers to the amount of vertical pressure caused by the body force at the two-dimensional coordinate position in the direction perpendicular to the plane; interpret and analyze the two-dimensional pressure distribution and generate at least one characteristic parameter; perform the calculation based on the characteristic parameter and the integrated factor A lying posture comparison step is used to compare and identify a lying posture; a bony prominence coordinate calibration step is performed 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 Calibrate at least one bony prominence of the body of the lying human body and the bony prominence coordinates of the bony protrusion that presses on the support device; perform a pressure injury probability determination step to detect the bony protrusion coordinates corresponding to A local peak pressure is determined, and the probability of pressure injury of at least one bony protrusion point is determined, and each bony protrusion point is divided into A risk degree is generated, wherein the higher the risk degree, the higher the local peak pressure of the bony protrusion point, which means the higher the probability of pressure injury; a risk ranking step is performed based on the risk degree to at least A probability of occurrence of pressure injury at the bony protrusion point generates a risk ranking, and according to the risk ranking, recalculates and distributes the support force of at least one bony prominence coordinate, and generates a redistribution model parameter to facilitate redistribution of the bony prominence point. All the support units in the two-dimensional array of the plurality of groups simultaneously have the required support strength; and a pneumatic configuration is generated by the redistribution model parameters to perform a redistribution process of the integrated pressure distribution, and the adjustment is driven based on the pneumatic configuration. 1. The individual shape and hardness of the support unit in areas at high risk of crushing. The method as described in claim 1, wherein the above-mentioned 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 method as described in claim 1, wherein the above lying posture comparison step is a comparative learning of artificial intelligence to calculate the lying posture of the user on the support device and classify it into supine lying posture. , lying on the left side, lying on the right side, sleeping on the stomach and whether the hands and feet are crossed, etc., and all steps can be judged, analyzed and automatically controlled by artificial intelligence through machine learning and big data comparison. The method described in claim 1 further includes performing a pressure reduction procedure according to a pressure reduction percentage and/or a pressure reduction value to first reduce the specific saturated internal air pressure before performing the redistribution procedure of the body pressure distribution, The redistribution model parameters further include the pressure reduction percentage and/or the pressure reduction value, wherein the pressure reduction percentage is a pressure reduction ratio to the previously saturated internal air pressure. The method of claim 4, wherein the pressure reduction percentage is 5% to 35% of the original saturated internal air pressure, and the pressure reduction percentage is preferably 15% to 25% of the original saturated internal air pressure. The method of claim 1 further includes repeating the pressure distribution measurement step and generating an updated two-dimensional pressure distribution, and repeating the above steps based on the updated two-dimensional pressure distribution. If the two-dimensional pressure distribution shows the The local peak pressure corresponding to the high-risk parts of pressure injury cannot make every If the probability of occurrence of pressure injury at the bony protrusion is lower than a predetermined critical probability value, then the lying pressure image of the human body must be scanned cyclically and the redistribution model parameters must be adjusted in batches based on the updated two-dimensional pressure distribution until the The two-dimensional pressure distribution shows that the probability of occurrence of pressure injury at each bony protrusion point is lower than the critical probability value. If it is not lower than the critical probability value, the process of reducing the risk is repeated until the risk is reduced below up to the critical probability value. The method of claim 1 further includes at least one of the following: the distribution density of the pressure sensor is higher than the distribution density of the support units. The method of claim 1 further includes at least one of the following: the edge distance between at least two pressure sensors is less than three centimeters, and the center distance between at least two pressure sensors is less than three centimeters. The method of claim 1, wherein the above-mentioned support unit can adjust at least one of the following: horizontal size, vertical size, and softness and hardness, and the support unit can change the supporting force generated by it by changing the fluid inside it. Dimensional outline. The method as described in claim 1, wherein the above-mentioned air pressure configuration includes all the air pressure data that need to be regulated by the support unit located at the bony protrusion point with the risk level, thereby redistributing the time when the human body lies on the support device. , the support pressure endured by the support unit, and reduce the local peak pressure corresponding to the high-risk location of pressure injury.

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