CN213346480U - Air cushion bed for preventing pressure damage - Google Patents
Air cushion bed for preventing pressure damage Download PDFInfo
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- CN213346480U CN213346480U CN202021783171.3U CN202021783171U CN213346480U CN 213346480 U CN213346480 U CN 213346480U CN 202021783171 U CN202021783171 U CN 202021783171U CN 213346480 U CN213346480 U CN 213346480U
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Abstract
The utility model relates to an air cushion bed for preventing pressure damage, which comprises an air cushion bed body and an air source device, wherein a plurality of groups of mutually independent air bag units arranged in a matrix form are arranged on the air cushion bed body, each air bag unit consists of a plurality of air bags, air valves are arranged on the air bags, a control module is also arranged in the air bags, each air bag is connected with an inflation branch pipe, the inflation branch pipes on the air bag groups in the same group are connected with the same inflation pipe, and the air source device is arranged on the inflation pipe; the air source device comprises a master controller and an air pump system. Its advantages are: the utility model is simple in operation, the practicality is strong, can carry out the analysis of integrating to the pressure data of each position on the air cushion bed to the air cushion of controlling different positions keeps the gas filled state, prevents that a certain specific health position overlength of patient from bearing too big vertical pressure, and fundamentally prevents to press the production of sore, alleviates medical care burden, saves medical expense.
Description
Technical Field
The utility model belongs to the technical field of clinical supplementary technique and specifically relates to a prevent air bed of pressure nature damage.
Background
Patients lying in bed for a long time have weak physical strength, loss of motion function and incapability of changing the lying position, and if nursing is not carried out properly, a large amount of sweat, excrement and urine incontinence can occur, and the bed pad is wet and dry and hot for a long time, so that skin tissues and even muscles between the bony prominences on the body surface and the bed pad are continuously pressed, are locally anoxic, invade the body by the moisture, and are subjected to vascular embolism and tissue necrosis and slough to form ulcer, which is called bedsore and is also called pressure sore. According to statistics, the incidence rate of pressure sores in hospitalized patients is 3% -12%, the incidence rate of pressure sores in elderly patients is 10% -25%, and the death rate is increased by 6 times.
The key point of solving the pressure sore lies in prevention, and along with the development of medical technology and materials, the air cushion bed also plays an important role in the pressure sore prevention and treatment work, but most of the air cushion beds are fixed in shape at present, the shape is fixed after inflation, the patient needs to turn over continuously during long-term bed rest to change the position to prevent the pressure sore, and a nursing worker needs to turn over the patient regularly in the conventional nursing process, so that the operation is complex, the workload is huge, and if a working error occurs, a certain patient is left out, and the irretrievable consequence is easy to generate.
The Chinese patent application: CN206837065U discloses an anti-pressure sore air cushion bed, which comprises a bedstead, wherein a plurality of guide through grooves are formed in a top plate of the bedstead, a plurality of divided plates are arranged to form an upper plate body, a cushion layer is fixed on the top surface of each divided plate body, a plurality of inflation bags are fixed on the top surface of the cushion layer, two placing plates are fixed on the bedstead, an inflation pump host is fixed on each placing plate, an inflation pump is arranged in each inflation pump host, a plurality of air outlet holes are formed in each inflation pump, each air outlet hole is connected with a connecting air pipe, each connecting air pipe is connected with a plurality of air distributing pipes, and each air distributing pipe is connected with a corresponding inflation bag; a plurality of rodless cylinders are fixed on the bottom surface of a top plate of the bedstead, moving plates are fixed on sliding blocks of the rodless cylinders, and the moving plates are inserted and sleeved in the guide through grooves. The device mainly realizes length adjustment according to the height of a user, and simultaneously can move the position of the inflatable bag, thereby supporting and massaging different positions of the human body without generating massaging and supporting dead angles. The Chinese patent application: CN201894708U discloses a medical bedsore air cushion bed that prevents, belong to medical apparatus field, including the air cushion bed body to and the air cushion mattress that matches with it on the air cushion bed body, the air cushion mattress passes through air duct and air supply subassembly, this technical essential lies in that the air cushion mattress comprises respectively mutual independence, and the strip gasbag unit that is wavy in succession, and the odd number strip gasbag unit of these strip gasbag units is UNICOM each other through same air duct between the strip gasbag unit of even number, and each air duct is associative with the air supply subassembly respectively through same air duct UNICOM each other. The air cushion bed has the advantage of well preventing bedsores of bedridden patients. The air cushion bed in the prior art does not have the functions of timing, fixing point and pressure, carrying out rehabilitation exercise on different parts of a patient according to requirements and preventing and treating bedsores; the effect is not good for serious patients, especially for patients who are bedridden for a long time and cannot live for self-care or paraplegia, and a large amount of nursing work is still needed, so the use is very troublesome.
Therefore, there is a need for an air cushion bed capable of performing integrated analysis on pressure data at various positions on the air cushion bed, controlling air cushions at different positions to keep an inflated state, preventing a specific body part of a patient from bearing excessive vertical pressure for too long time, fundamentally preventing pressure sores, reducing medical care burden, and saving medical expenses. However, no report has been made on such a novel air cushion bed for preventing pressure injury.
Disclosure of Invention
The utility model aims at providing an air cushion bed of prevention pressure nature damage.
In order to achieve the purpose, the utility model adopts the technical proposal that:
an air cushion bed for preventing pressure damage comprises an air cushion bed body and an air source device, wherein a plurality of groups of air bag units which are independent from each other and arranged in a matrix form are arranged on the air cushion bed body, each air bag unit consists of a plurality of air bags, air valves are arranged on the air bags, a control module is further arranged inside the air bags, and the control module consists of a controller, a pressure sensor and a timer which are electrically connected with each other; each air bag is connected with an inflation branch pipe, the inflation branch pipes on the same air bag group are connected with the same inflation pipe, and the inflation pipes are provided with air source devices; the air source device comprises a master controller and an air pump system.
In the above air bed for preventing pressure injury, preferably, the air cells of the air cell units are independent from each other and combined in a matrix.
In the above air bed for preventing pressure injury, as a preferred scheme, the general controller is electrically connected to the controller in each air bag, and is configured to control inflation or deflation of the plurality of air bags simultaneously.
In the above air bed for preventing pressure damage, as a preferred scheme, the master controller is further connected with an alarm device, a temperature sensor and a humidity sensor, and the temperature sensor and the humidity sensor are arranged at set positions of the air bed body.
In the above air bed for preventing pressure injury, as a preferable solution, the control module further includes a memory for storing and recording the pressure sensor, the timer, and the air valve measurement data, the specific data for generating data or action, and the specific time.
In the air bed for preventing pressure damage, as a preferable scheme, the air bed further comprises a silencing unit for eliminating noise in the use process of the medical air bed, and the silencing unit is electrically connected with the air source device.
The utility model has the advantages that:
1. the utility model is convenient in operation, the practicality is strong, can gather in real time the pressure that each gasbag of bed bore to carry out the integrated analysis to data, to the pressure-bearing overweight and exceed the gasbag of certain length and deflate the pressure release, to the pressure-bearing light and exceed the gasbag of certain length and inflate the pressurization, prevent that health position weight distribution is uneven, can adjust the atmospheric pressure of each position of air cushion bed in a flexible way, just every gasbag all control by solitary inflation branch pipe, can adjust the atmospheric pressure of each position of air cushion bed in a flexible way, have the circulation that keeps blood in patient's health, prevent decubital effect.
2. The utility model provides a gasbag unit matrix combination can set up the treatment mode of multiple difference according to concrete in service behavior, every mode can be according to patient's demand at the site, pressure and time point make the definition, the contact surface that makes mattress and patient contact presents different contact surfaces at different times, and can carry out the wriggling massage to patient specific part through the upper and lower wriggling of gasbag unit at specific time, guide patient stands up regularly, it is not smooth to prevent that the patient from sickening the blood circulation that the bed leads to for a long time, increase patient treatment, prevention and treatment bedsore, alleviate and doctorse and nurses the burden, save the medical expense.
3. The utility model discloses in temperature sensor and humidity transducer can detect temperature information and humidity information on the air mattress and send for total controller, when the temperature on the air mattress is too high, cross low or humidity is too big, during the undersize, total controller control pressure sensor carries out appropriate inflation or gassing, realize standing up to the patient, prevent that the patient from sickening the blood circulation that the bed leads to for a long time not smooth to also solve among the prior art because can not detect air bed temperature and humidity and lead to the air bed can not exert the effect of prevention pressure sore.
Drawings
Fig. 1 is a schematic structural diagram of an air cushion bed for preventing pressure damage according to the present invention.
Fig. 2 is a schematic structural view of a part of the air bag unit on the air cushion bed for preventing pressure injury in the present invention.
FIG. 3 is a schematic cross-sectional view of the central controller in different modes of the air cushion bed and the patient interface.
Fig. 4 is a schematic partial flow diagram between the components of the air cushion bed for preventing pressure damage and the overall controller according to the present invention.
Detailed Description
The present invention will be further described with reference to the following detailed description. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes and modifications can be made by those skilled in the art after reading the disclosure of the present invention, and such equivalents also fall within the scope of the appended claims.
The reference numerals and components referred to in the drawings are as follows:
1. air cushion bed body 2, air source device 3 and air bag unit
4. Air bag 5, air valve 6 and control module
7. Controller 8, pressure sensor 9, timer
10. Inflating branch pipe 11, inflating pipe 12 and alarm device
13. Temperature sensor 14, humidity sensor 15, memory
16. Mute unit 21, master controller 22, air pump system
EXAMPLE 1 air cushion bed for preventing pressure injury
Referring to fig. 1-4, fig. 1 is a schematic structural view of an air cushion bed for preventing pressure injury according to the present invention. Fig. 2 is a schematic structural view of a part of the air bag unit on the air cushion bed for preventing pressure injury in the present invention. FIG. 3 is a schematic cross-sectional view of the central controller in different modes of the air cushion bed and the patient interface. Fig. 4 is a schematic partial flow diagram between the components of the air cushion bed for preventing pressure damage and the overall controller according to the present invention.
The device is mainly applied to solving the problem of pressure injury such as blisters, ulcers or gangrene caused by blood circulation blockage due to pressure caused by long-term bedridden patients, and skin and subcutaneous tissue ischemia, and particularly relates to an air cushion bed for preventing pressure injury, which comprises an air cushion bed body 1 and a gas source device 2, wherein a plurality of groups of mutually independent and matrix-arranged air bag units 3 are arranged on the air cushion bed body 1, the air bag units 3 are composed of a plurality of air bags 4, an air valve 5 is arranged on each air bag 4, a control module 6 is also arranged in each air bag 4, the control module is composed of a controller 7, a pressure sensor 8 and a timer 9 which are mutually and electrically connected, the pressure sensor 8 is used for measuring the pressure applied on the air cushion bed and transmitting the pressure to the controller 7, and the controller 7 judges the value read by the pressure sensor 8, and then starts the timer 9 according to the read value, thereby realizing the inflation and deflation of the air valve 5. Each air bag 4 is connected with an inflation branch pipe 10, the inflation branch pipes 10 on the same air bag group are connected with the same inflation pipe 11, and the inflation pipe 11 is provided with an air source device 2; the air source device 2 comprises a master controller 21 and an air pump system 22, when the pressure sensor 8 on the air cushion bed body senses the pressure in the air bag and converts the pressure into a signal to be fed back to the controller 7, the master controller 21 sends out an instruction according to a set program, and the air inlet and outlet amount of the air valve is controlled by opening and closing the air valve 5, so that the air bag units at different matrix positions meet the pressure supporting requirement of a single site in the matrix, and the contact surface of the air cushion bed and a patient presents a specific supporting surface according to the requirement of the state of an illness.
The specific control process is as follows: when the air bag is inflated, according to the requirements of diseases, the pressure of the air bags arranged in the matrix is set to be A by a program, the pressure sensor 8 detects that the pressure of the air bag is A1 at the time point T1, if the value read by the pressure sensor 8 is lower than a pressure set value A, a timer is started, and if the time recorded by the timer 9 exceeds a time set value T1, the controller 7 starts an air valve to inflate and pressurize the air bag until the pressure in the air bag is higher than the pressure set value A; when the air is deflated: according to the disease requirement, the pressure of the air bags arranged in the matrix is set to be P by a program, the pressure sensor 8 detects the pressure of the air bag to be P2 at the time point T1, if P2 is more than P, the pressure sensor converts the sensed pressure P2 value into an electric signal and feeds the electric signal back to the master controller 21, the master controller 21 sends an instruction to give an air valve according to the set program, the air valve is controlled to be opened, the air bag unit is deflated, when the pressure in the air bag unit reaches P, the air outlet valve is closed, the air bag unit stops deflating, and the time point is T2.
Referring to fig. 3, in the present embodiment, it is preferable that the air bags 4 on the air bag unit 3 are respectively independent and arranged in a transverse direction, and a plurality of air bags 4 are combined in a matrix form, and the shape of the air bags 4 may be an oval or rectangular structure. And the branch inflation pipe 10 controls each single air bag 4, so that the air bags can present different heights, and the height can be adjusted appropriately according to different pressure, and the specific operation is as follows: because different air bag sites, different pressure requirements and different time points are combined to form different modes of the contact surfaces of different patients, as shown in modes 1, 2, 3 and 4 in fig. 3, the modes 1 and 2 indicate that the air cushion bed body presses the contact surfaces of the patients at different time points or prevents bedsores through the different contact surfaces; the mode 3 indicates that the bedsore part is subjected to emptying treatment, and the bedsore part of a patient cannot be stressed, so that the treatment purpose is achieved; mode 4 indicates that the best contact surface is adjusted as required according to patient's position and bedsore size, can receive suitable support when making the patient bed up for a long time. The utility model discloses a 3 matrix combinations of gasbag unit still can set up the treatment mode of multiple difference according to concrete in service behavior, every mode can be according to patient's demand at the site, pressure and time point make the definition, the contact surface that makes mattress and patient contact presents different contact surfaces at different times, and can carry out the wriggling massage to patient specific part through the upper and lower wriggling of gasbag unit at specific time (before sleeping as the evening), guide patient stands up regularly, it is not smooth to prevent that the patient from sickening the blood circulation that the bed leads to for a long time, increase patient treatment, prevention and treatment bedsore, alleviate and doctorse and nurses the burden, save the medical expense.
In the present embodiment, the general controller 21 is preferably electrically connected to the controller 7 in each air bag 4 for controlling the inflation or deflation of a plurality of air bags 4 simultaneously. The master controller 21 can control the air pressure in different matrix site air bags in a timing and constant pressure mode according to a set program, and control the air pressure in the air pump system, so that the air cushion bed body presents a specific supporting surface at a specific time point, and the requirements of patient rehabilitation and bedsore prevention are met according to the state of an illness.
In this embodiment, it is preferred that total controller 21 still be connected with alarm device 12, temperature sensor 13 and humidity transducer 14, just temperature sensor 13 and humidity transducer 14 set up the settlement position at the air cushion bed body, temperature sensor 13 and humidity transducer 14 can set up on the inflatable mattress apart from head of a bed 8/15 bed length, apart from the both sides position along 1/2 bed width (this setting can match the temperature and the humidity of daily patient's perineum department), just temperature sensor 13 and humidity transducer 14 can be used for detecting temperature information and humidity information on the air cushion bed body. The temperature information detected by the temperature sensor is sent to the signal input end on the master controller 21 through the signal output end, the humidity information detected by the humidity sensor is sent to the signal input end on the master controller through the signal output end, so that the master controller obtains the temperature information and the humidity information on the air cushion bed body, when the master controller judges that the temperature information on the air cushion bed body is greater than or less than a temperature set value and the humidity information on the air cushion bed body is greater than or less than a humidity set value, the alarm device 12 takes measures to prompt a command, the controller 7 positioned in the air bag starts to operate after receiving the command of the master controller, the operation command of inflation or deflation is carried out, so as to assist a patient to turn over and change the body position, prevent a certain specific body part of the patient from bearing excessive vertical pressure for too long time, and fundamentally prevent pressure sores from generating, reducing the working pressure of the nursing staff.
In this implementation, it is preferable that the control module 6 further includes a memory 15 for storing and recording the measurement data, the generated data, or the specific data and the specific time of the action of the pressure sensor 8, the timer 9, and the air valve 5, so as to facilitate medical staff to accurately record the daily information of the patient, make a reasonable treatment plan for the patient, reduce the pain of the patient, and enable the body of the patient to recover to the health faster.
In this embodiment, it is preferable that the bed further comprises a silencing unit 16 for eliminating noise during use of the medical air cushion bed, and the silencing unit 16 is electrically connected to the air source device 2. The silencing unit 16 in the device can reduce the noise of the air cushion bed body in the using process, so that a patient feels more comfortable; the mute unit is electrically connected with the air source device, and can be started simultaneously when the master controller and the air pump system are started, so that the use is more convenient.
The utility model discloses a use method: in the using process, a patient lies on the air cushion bed body, when the patient needs to realize a massage effect, medical staff sets instructions on the master controller, the master controller sends out control signals, the air pump system and the mute unit are started simultaneously, a plurality of air bags on the air bag units are inflated and exhausted at intervals, time intervals are set, the master controller can control the air bags to slowly and uniformly exhaust air from left to right and inflate the air bags, the air pump system circularly reciprocates until preset time is reached, and the air pump system stops inflating or exhausting the air bags; meanwhile, the inflation and air extraction degrees of all the chambers can be controlled, so that different massage amplitudes are realized; because each air bag is respectively connected with the inflation branch pipe, the pressure position of the air bag can be controlled independently and better, so that the patient can lie on the air cushion bed stably, and the side slip of the patient in the massage process is avoided; if the turning effect needs to be realized, the patient lies on the air cushion bed, the master controller is operated to set a program, the master controller sends out a control signal, the air pump fills the air bags on the whole air bag units with air, and the air pressure in the whole air bags on the air bag units on the left side and the right side is controlled, so that different turning amplitudes are realized.
It should be noted that: the utility model can collect the pressure born by each air bag of the bed body in real time, integrate and analyze the data, deflate and release the pressure for the air bag with overweight pressure bearing and exceeding a certain time, inflate and pressurize the air bag with overweight pressure bearing and exceeding a certain time, prevent the uneven weight distribution of the body part, and effectively and fundamentally prevent the pressure sore; the temperature sensor and the humidity sensor can detect temperature information and humidity information on the inflatable mattress and send the temperature information and the humidity information to the master controller, when the temperature on the inflatable mattress is too high or too low or the humidity is too high or too low, the master controller controls the pressure sensor to carry out proper inflation or deflation so as to turn over a patient and prevent unsmooth blood circulation caused by long-time sickbed sickening of the patient, thereby solving the problem that the air cushion bed can not play a role in preventing pressure sores due to the fact that the temperature and the humidity of the air cushion bed can not be detected in the prior art; the utility model provides an gasbag unit matrix combination can set up multiple different treatment mode according to concrete in service behavior, each mode can be according to patient's demand make the definition at the position, pressure and time point, the contact surface that makes mattress and patient contact presents different contact surfaces at different times, and can carry out the wriggling massage to patient's specific part through the upper and lower wriggling of gasbag unit at specific time (like before sleeping at night), guide the patient and turn over regularly, prevent that the blood circulation that the long-time sick bed of patient leads to of sickening is not smooth, increase patient treatment, prevent and treat bedsore, alleviate and doctorse and nurses the burden, save medical expenses; just the utility model discloses in every gasbag all control by solitary branch pipe of aerifing, can adjust the atmospheric pressure at each position of air bed in a flexible way, have the circulation that keeps blood in patient's health, prevent decubital effect, also improved patient's comfort level simultaneously.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and additions can be made without departing from the principles of the present invention, and these improvements and additions should also be regarded as the protection scope of the present invention.
Claims (6)
1. The air cushion bed for preventing pressure damage is characterized by comprising an air cushion bed body and an air source device, wherein a plurality of groups of air bag units which are independent from each other and arranged in a matrix form are arranged on the air cushion bed body, each air bag unit consists of a plurality of air bags, an air valve is arranged on each air bag, a control module is also arranged in each air bag, and each control module consists of a controller, a pressure sensor and a timer which are electrically connected with each other; each air bag is connected with an inflation branch pipe, the inflation branch pipes on the same air bag group are connected with the same inflation pipe, and the inflation pipes are provided with air source devices; the air source device comprises a master controller and an air pump system.
2. The pressure injury prevention air cushion bed according to claim 1, wherein the air cells of said air cell units are independent and combined in a matrix form.
3. The pressure injury prevention air cushion bed according to claim 1, wherein the master controller is electrically connected to the controller in each air cell for controlling the inflation or deflation of the plurality of air cells simultaneously.
4. The air cushion bed for preventing pressure injury according to claim 1, wherein the master controller is further connected with an alarm device, a temperature sensor and a humidity sensor, and the temperature sensor and the humidity sensor are arranged at set positions of the air cushion bed body.
5. The pressure injury preventive air cushion bed according to claim 1, wherein the control module further comprises a memory for storing and recording pressure sensor, timer and air valve measurement data, specific data for generating data or action and specific time.
6. The air cushion bed for preventing pressure injury according to claim 1, further comprising a silencing unit for eliminating noise during use of the air cushion bed for medical use, wherein the silencing unit is electrically connected to the air supply device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021783171.3U CN213346480U (en) | 2020-08-24 | 2020-08-24 | Air cushion bed for preventing pressure damage |
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| CN202021783171.3U CN213346480U (en) | 2020-08-24 | 2020-08-24 | Air cushion bed for preventing pressure damage |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113509337A (en) * | 2021-08-03 | 2021-10-19 | 绍兴康特宝医疗科技有限责任公司 | Intelligent mattress and adjusting method thereof |
| CN113599102A (en) * | 2021-08-26 | 2021-11-05 | 绍兴市人民医院 | Leakage-proof air cushion bed with three horses |
| CN113712752A (en) * | 2021-09-13 | 2021-11-30 | 游通涵 | Inflatable mattress capable of being accurately controlled and control method thereof |
| CN114041966A (en) * | 2021-11-25 | 2022-02-15 | 重庆英湃尔医疗科技有限公司 | Negative plate return circuit pad system of self-adaptation regulation |
| CN114052711A (en) * | 2021-12-14 | 2022-02-18 | 王磊 | Warning, preventing and treating device for skin subcutaneous tissue injury |
| CN114732613A (en) * | 2022-03-22 | 2022-07-12 | 华中科技大学同济医学院附属协和医院 | Sore nursing bed is pressed in prevention |
| CN115337161A (en) * | 2022-08-16 | 2022-11-15 | 重庆医药高等专科学校附属第一医院 | Mattress system for preventing skin pressure injury and pressure regulating method |
| CN115645181A (en) * | 2022-12-14 | 2023-01-31 | 山东大学 | Pressure sore prevention pad and control method |
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2020
- 2020-08-24 CN CN202021783171.3U patent/CN213346480U/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113509337A (en) * | 2021-08-03 | 2021-10-19 | 绍兴康特宝医疗科技有限责任公司 | Intelligent mattress and adjusting method thereof |
| CN113599102A (en) * | 2021-08-26 | 2021-11-05 | 绍兴市人民医院 | Leakage-proof air cushion bed with three horses |
| CN113712752A (en) * | 2021-09-13 | 2021-11-30 | 游通涵 | Inflatable mattress capable of being accurately controlled and control method thereof |
| CN114041966A (en) * | 2021-11-25 | 2022-02-15 | 重庆英湃尔医疗科技有限公司 | Negative plate return circuit pad system of self-adaptation regulation |
| CN114041966B (en) * | 2021-11-25 | 2024-02-13 | 重庆英湃尔医疗科技有限公司 | Negative plate loop pad system capable of being adjusted in self-adaptive mode |
| CN114052711A (en) * | 2021-12-14 | 2022-02-18 | 王磊 | Warning, preventing and treating device for skin subcutaneous tissue injury |
| WO2023109478A1 (en) * | 2021-12-14 | 2023-06-22 | 王磊 | Warning, prevention and treatment device for skin subcutaneous tissue injury |
| CN114732613A (en) * | 2022-03-22 | 2022-07-12 | 华中科技大学同济医学院附属协和医院 | Sore nursing bed is pressed in prevention |
| CN115337161A (en) * | 2022-08-16 | 2022-11-15 | 重庆医药高等专科学校附属第一医院 | Mattress system for preventing skin pressure injury and pressure regulating method |
| CN115645181A (en) * | 2022-12-14 | 2023-01-31 | 山东大学 | Pressure sore prevention pad and control method |
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