CN111888127A

CN111888127A - Pressure injury prevention nursing bed with multiple modules and control method thereof

Info

Publication number: CN111888127A
Application number: CN202010711841.9A
Authority: CN
Inventors: 吴巍巍; 程丹; 于家傲
Original assignee: First Hospital Jinlin University
Current assignee: First Hospital Jinlin University
Priority date: 2020-07-22
Filing date: 2020-07-22
Publication date: 2020-11-06

Abstract

The invention relates to a pressure injury prevention nursing bed with a plurality of modules, which comprises a bed base frame, a module mattress and a controller, wherein the module mattress is arranged on the bed base frame; the bed base frame comprises a bottom frame, a side plate frame, a front baffle, a rear baffle and side baffles; the bottom frame is a rectangular frame, four corners of the bottom frame are provided with universal wheels, and the side plate frame is a rectangular frame and is fixed on the bottom frame; the front baffle is a square plate and is fixedly erected at the front end of the side plate frame, the rear baffle is fixedly erected at the rear end of the side plate frame, and the side baffles are four rectangular plates and are connected with the side surfaces of the side plate frame in a vertical sliding manner; the modular mattress comprises a mattress module and a module frame; the mattress module comprises a soft cushion, a pressure sensor and an electric push rod; the module frame comprises a module frame I and a module frame II; the module frame I and the module frame II are hinged through a shaft rod; the module frame II is fixed on the bottom frame, the module frame I is placed on the bottom frame, and the module frame I is provided with a lifting mechanism connected with the cross beam I; the controller comprises a shell, a control panel, a PLC, a digital-to-analog converter and a buzzer. The pressure sore prevention device is used for preventing pressure sores and has the functions of pressure monitoring, alarming and pressure releasing.

Description

Pressure injury prevention nursing bed with multiple modules and control method thereof

Technical Field

The invention relates to the field of pressure sore nursing, in particular to a pressure injury prevention nursing bed with a plurality of modules and a control method thereof.

Background

For long-term bedridden patients, skin tissues and even muscles between the body surface bony prominences and the bed pad are caused by extremely weak physical strength, or sensory and motor function loss, weakness and lying position conversion and improper nursing, and ulcers, which are formed by continuous pressure, local hypoxia, vascular embolism and tissue necrosis and sloughing, are called bedsores. Bedsores are often seen in paraplegic patients. Other conditions also occur, such as bone fractures, spinal cord injuries, post-operative, extensive burns, etc. The hair-growing parts are the sacrum, ischial tuberosity, greater trochanter of femur, etc., and the calcaneus, occipital bone, anterior superior iliac spine, internal and external malleolus, etc. The formation process is divided into three stages, namely a erythema stage, a vesicular stage and an ulcer stage. The prevention of bedsores is extremely important, mainly based on careful care. Treatment includes non-surgical treatment and surgical treatment. For surgical treatment, skin flaps and the like are mostly adopted to repair the wound surface except for complete excision of ulcer.

The prior art has the following problems: 1. lack of accurate detection of pressure, medical staff cannot know the condition of pressure borne by a patient, and untimely nursing can occur, so that pressure sores cannot be completely eradicated; 2. the patient who is limited to turn over for special diseases can not use the turning-over bed; 3. manual nursing is performed, and the workload and the working strength of nurses are increased; 4. particularly, in the epidemic period of the new coronavirus pneumonia, severe pneumonia patients mostly need to lie in bed for rest, the occurrence probability of pressure sores is increased, and the cross infection probability is increased when nurses assist in turning over.

Disclosure of Invention

In order to solve the technical problems, the scheme of the invention is as follows: provided are a pressure injury prevention nursing bed having a plurality of modules and a control method thereof.

A pressure injury prevention nursing bed with a plurality of modules comprises a bed base frame, a module mattress and a controller;

the bed base frame comprises a bottom frame, a side plate frame, a front baffle, a rear baffle and side baffles; the bottom frame is a rectangular frame, and a cross beam I and a cross beam II are arranged in the frame; universal wheels are arranged at four corners of the lower part of the frame; the side plate frame is a rectangular frame formed by combining four plates, and the bottom surface of the side plate frame is fixed on the bottom frame; the front baffle is a square plate and is fixedly erected at the front end of the side plate frame, and the upper end of the front baffle is a round angle; the rear baffle is fixedly erected at the rear end of the side plate frame, the upper end of the rear baffle is provided with a fillet, and the height of the rear baffle is half of that of the front baffle; the side baffle plates are four rectangular plates and are connected with the side surfaces of the side plate frames in a vertical sliding manner, the side baffle plates slide downwards to facilitate a patient to move onto a bed or fall off the bed, and the upper sliding side baffle plates prevent the patient from falling off the bed carelessly; the side baffle is provided with a long groove above the rectangular column, so that the side baffle can be lifted to slide up and down conveniently;

the modular mattress comprises a mattress module and a module frame; the mattress module comprises a soft cushion, a pressure sensor and an electric push rod; the soft cushion is a square cushion, a rectangular plate gasket is arranged on the bottom surface, a pressure sensor is arranged in the center of the lower bottom surface of the gasket, and an electric push rod is connected below the pressure sensor; the module frame comprises a module frame I and a module frame II; the bottom surfaces of the module frame I and the module frame II are rectangular frames, square strip supporting mattress modules are arranged in the rectangular frames, n-shaped frames are arranged on the rectangular frames, and the n-shaped frames and the rectangular frames are supported by a plurality of stand columns; the front ends of two arms of an n-shaped frame of the module frame I and the module frame II are movably hinged through shaft rods, and the module frame I can tilt and descend relative to the module frame II; the module frame II is fixed on the bottom frame and is close to the rear baffle; the module frame I is placed on the bottom frame, a lifting mechanism is arranged on one square strip in the rectangular frame and connected with the cross beam I, and the lifting mechanism pushes the module frame II to tilt and descend; the mattress modules are linearly arrayed in the module frame I and the module frame II to form a module mattress, and the base of the electric push rod is fixed on the upper surface of the square strip;

the controller comprises a shell, a control panel, a PLC, a digital-to-analog converter and a buzzer; the shell is fixedly arranged on a side plate frame below the rear baffle, and a PLC, a digital-to-analog converter and a buzzer are arranged in the shell; the control panel is mounted on the surface of the shell.

Furthermore, two sides of the side plate frame are respectively fixed with four vertical columns with T-shaped sections, the lower bottom surface of each T-shaped column is fixed with a rectangular sheet-side baffle supporting sheet, and the outer side surface of each T-shaped column is provided with a row of threaded holes; two rectangular columns are arranged on the inner sides of the side baffles, T-shaped grooves matched with the T-shaped columns are formed in the rectangular columns, and circular through holes are formed in the bottom surfaces of the T-shaped grooves; the T-shaped cylinder is matched with the T-shaped groove, and a knob is arranged in the circular through hole and matched with the threaded hole;

furthermore, the lifting mechanism comprises a connecting block I, an air cylinder, a connecting block II and a connecting block III; the connecting block I is two rectangular blocks fixed on the lower surfaces of the square strips, circular holes are formed in the side walls of the rectangular blocks, bolt and nut I are arranged on the circular holes, and telescopic rods of the air cylinders penetrate through the bolts and are movably hinged with the connecting block I; the cylinder base is fixedly provided with a connecting block II, and the connecting block II is a rectangular block with a round hole on the convex side wall of the rectangular plate; connecting block III fixes on the side of crossbeam I, and connecting block III is the rectangle piece, and the upper surface of lifting the piece is equipped with two bellied rectangle pieces, and it has the round hole to open on the rectangle piece lateral wall, and bolt nut II passes connecting block II, connecting block III's round hole and makes connecting block II, connecting block III form the activity articulated.

Further, the control panel comprises a display, control buttons; the control buttons comprise a numeric keyboard, an upper selection key, a lower selection key, a left selection key, a right selection key, a confirmation button, a modification button, a bed head lifting button, a bed head descending button and a switch key.

A method of controlling a pressure injury prevention care bed having a plurality of modules, comprising:

(1) pressure monitoring and alarming: the pressure threshold value and the alarm triggering time are set through the controller, the digital-to-analog converter converts the pressure threshold value and the alarm triggering time into electric signals to be transmitted to the PLC, the pressure sensor collects pressure signals to be transmitted to the transmitter, the transmitter converts the pressure signals into electric signals recognized by the PLC, the PLC recognizes and compares the two pressure electric signals, and if the pressure value collected by the pressure sensor is higher than the set pressure threshold value, the PLC makes the buzzer sound to alarm after the alarm triggering time is reached;

(2) lifting the module: presetting a pressure threshold, a module descending trigger time and a module ascending trigger time, converting the pressure threshold and the alarming trigger time into electric signals by a digital-to-analog converter and transmitting the electric signals to a PLC (programmable logic controller), acquiring pressure signals by a pressure sensor and transmitting the pressure signals to a transmitter, converting the pressure signals into the electric signals identified by the PLC by the transmitter, comparing the two pressure electric signals by the PLC, sending a signal to a control element of an electric push rod by the PLC to descend the module mattress if the pressure of the module mattress exceeds the pressure threshold and reaches the module ascending trigger time, and sending a signal to the control element of the electric push rod by the PLC to ascend and reset the module mattress after the module ascending;

(3) the bed head is lifted: the button is lifted up through the head of a bed on control panel, and head of a bed decline button control, the control element who continuously presses the head of a bed to lift up the button cylinder will make the telescopic link extension of cylinder push module frame I perk, and the control element who continuously presses head of a bed decline button cylinder will make the telescopic link of cylinder contract back and push module frame I and descend.

Advantageous effects of the invention

(1) The nursing bed is provided with the module mattress, the pressure sensor is arranged in the module mattress and used for detecting the pressure applied to the mattress, and the alarm can remind medical staff to treat the pressure sore after the pressure sore reaches a value set by setting an alarm pressure value;

(2) the mattress of the nursing bed is formed by splicing the module mattresses, the electric push rod is arranged in the module mattress to control the lifting of the single module mattress, when the local pressure is overlarge and the time is overlong, the electric push rod enables the module mattress in the range to descend, so that the part of the tissue of a patient is in a suspended state, and the pressure is released; the electric push rod is enough at the later time, and then the module mattress is lifted and reset;

(3) the mattress of the nursing bed is lifted by the intelligent control module through the PLC, the parameters are set by the control panel, and other processes are controlled and finished by the PLC without excessive manual operation.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments are briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of a pressure injury prevention care bed having a plurality of modules;

FIG. 2 is a schematic bottom view of a pressure injury prevention nursing bed with multiple modules;

fig. 3 is a schematic diagram of a mattress module construction;

FIG. 4 is a schematic diagram of a controller;

FIG. 5 is a schematic view of the connection structure of the side panel frame and the side baffle;

FIG. 6 is a schematic view of the connection structure of the lifting mechanism;

the parts and their numbers in the drawings are as follows:

the bed comprises a bed base frame 1, a bottom frame 1-1, side plate frames 1-2, front baffles 1-3, rear baffles 1-4, side baffles 1-5, cross beams I1-6, cross beams II 1-7, universal wheels 1-8, T-shaped cylinders 1-9, T-shaped grooves 1-10, knobs 1-11, threaded holes 1-12 and side baffle supporting sheets 1-13;

the device comprises a module mattress 2, a mattress module 2-1, a module frame 2-2, a cushion 2-3, a pressure sensor 2-4, an electric push rod 2-5, a gasket 2-6, a module frame I2-7, a module frame II 2-8, a rectangular frame 2-9, square strips 2-10, upright posts 2-11, an n-shaped frame 2-12, a shaft rod 2-13, a connecting block I2-14, an air cylinder 2-15, a connecting block II 2-16, a connecting block III 2-17, a bolt and nut I2-18, a bolt and nut II 2-19 and a transmitter 2-20;

the device comprises a controller 3, a shell 3-1, a control panel 3-2, a PLC3-3, a digital-to-analog converter 3-4 and a buzzer 3-5.

Detailed Description

The invention will now be described more fully hereinafter with reference to specific embodiments thereof. It should be noted that the air cylinder, the PLC, the digital-to-analog converter, the transmitter, the pressure sensor, and the display in the present invention are prior art.

The air cylinder is an SC40 × 500 standard air cylinder, the PLC is an FX2N 30MR, the digital-to-analog converter is an AD7190 module, and the transmitter is a Shengyu pressure transmitter intelligent plate; the pressure sensor is selected to be the FSR 402.

Example I

The structure of the pressure injury prevention nursing bed with a plurality of modules is shown in figures 1-6: comprises a bed base frame 1, a module mattress 2 and a controller 3;

the bed base frame 1 comprises a bottom frame 1-1, side plate frames 1-2, front baffles 1-3, rear baffles 1-4 and side baffles 1-5; the bottom frame 1-1 is a rectangular frame 2-9, and a cross beam I1-6 and a cross beam II 1-7 are arranged in the frame; the four corners of the lower part are provided with universal wheels 1-8; the side plate frame 1-2 is a rectangular frame formed by combining four plates, and the bottom surface of the side plate frame is fixed on the bottom frame 1-1; the front baffle plate 1-3 is a square plate and is fixedly erected at the front end of the side plate frame 1-2, and the upper end of the front baffle plate is a round angle; the rear baffle plate 1-4 is fixedly erected at the rear end of the side plate frame 1-2, the upper end of the rear baffle plate is provided with a fillet, and the height of the rear baffle plate is half of that of the front baffle plate 1-3; the side baffles 1-5 are four rectangular plates and are connected with the side surfaces of the side plate frames 1-2 in a vertical sliding manner, the side baffles 1-5 slide downwards to facilitate a patient to move onto a bed or fall off the bed, and the upper sliding side baffles 1-5 prevent the patient from falling off the bed carelessly; the side baffle 1-5 is provided with a long groove above the rectangular column, so that the side baffle 1-5 can be lifted to slide up and down conveniently;

the module mattress 2 comprises a mattress module 2-1 and a module frame 2-2; the mattress module 2-1 comprises a cushion 2-3, a pressure sensor 2-4 and an electric push rod 2-5; the soft cushion 2-3 is a square cushion, a rectangular plate gasket 2-6 is arranged on the bottom surface, a pressure sensor 2-4 is arranged in the center of the lower bottom surface of the gasket 2-6, and an electric push rod 2-5 is connected below the pressure sensor 2-4; the module frame 2-2 comprises a module frame I2-7 and a module frame II 2-8; the bottom surfaces of the module frame I2-7 and the module frame II 2-8 are rectangular frames 2-9, square strips 2-10 are arranged in the rectangular frames 2-9 to support the mattress module 2-1, the upper surface of the rectangular frames 2-9 is an n-shaped frame 2-12, and the n-shaped frame 2-12 and the rectangular frames 2-9 are supported by a plurality of upright posts 2-11; the front ends of two arms of the n-shaped frame 2-12 of the module frame I2-7 and the module frame II 2-8 are movably hinged through a shaft lever 2-13, and the module frame I2-7 can tilt and descend relative to the module frame II 2-8; the module frame II 2-8 is fixed on the bottom frame 1-1 and is close to the rear baffle 1-4; the module frame I2-7 is placed on the bottom frame 1-1, a lifting mechanism is arranged on a square strip 2-10 in the rectangular frame 2-9 and connected with the cross beam I1-6, and the lifting mechanism pushes the module frame II 2-8 to tilt and descend; the mattress modules are linearly arrayed in the module frames I2-7 and the module frames II 2-8 to form a module mattress, and the bases of the electric push rods 2-5 are fixed on the upper surfaces of the square strips 2-10;

the controller 3 comprises a shell 3-1, a control panel 3-2, a PLC3-3, a digital-to-analog converter 3-4 and a buzzer 3-5; the shell 3-1 is fixedly arranged on a side plate frame 1-2 below the rear baffle plate 1-4, and a PLC3-3, a digital-to-analog converter 3-4 and a buzzer 3-5 are arranged in the shell; the control panel 3-2 is mounted on the surface of the shell.

Two sides of the side plate frame 1-2 are respectively fixed with four vertical columns 1-9 with T-shaped sections, the lower bottom surfaces of the T-shaped columns 1-9 are fixed with rectangular sheet-side baffle supporting sheets 1-13, and the outer side surfaces of the T-shaped columns are provided with a row of threaded holes 1-12; two rectangular columns are arranged on the inner sides of the side baffles 1-5, T-shaped grooves 1-10 matched with the T-shaped columns 1-9 are formed in the rectangular columns, and circular through holes are formed in the bottom surfaces of the T-shaped grooves 1-10; the T-shaped column body 1-9 and the T-shaped groove 1-10 are matched with each other to realize that the side baffle plate 1-5 can slide up and down on the side plate frame 1-2, a knob 1-11 matched with a threaded hole 1-12 is arranged in the circular through hole, the tail end of the knob 1-11 is a threaded column, and the side baffle plate 1-5 can be fixed through the knob 1-11;

the lifting mechanism comprises a connecting block I2-14, an air cylinder 2-15, a connecting block II 2-16 and a connecting block III 2-17; the connecting blocks I2-14 are two rectangular blocks fixed on the lower surfaces of the square strips 2-10, circular holes are formed in the side walls of the rectangular blocks, bolts and nuts I2-18 are arranged on the circular holes, and telescopic rods of the cylinders 2-15 penetrate through the bolts to be movably hinged with the connecting blocks I2-14; a connecting block II 2-16 is fixed on the base of the cylinder 2-15, and the connecting block II 2-16 is a rectangular block with a round hole on the convex side wall of the rectangular plate; the connecting blocks III 2-17 are fixed on the side faces of the cross beams I1-6, the connecting blocks III 2-17 are rectangular sheets, two raised rectangular blocks are arranged on the upper surfaces of the lifting sheets, circular holes are formed in the side walls of the rectangular blocks, and the bolts and nuts II 2-19 penetrate through the connecting blocks II 2-16 and the circular holes of the connecting blocks III 2-17 to enable the connecting blocks II 2-16 and the connecting blocks III 2-17 to form movable hinges; the air cylinder 2-15 pushes the module frame I2-7 to tilt and descend relative to the module frame II 2-8.

The control panel 3-2 comprises a display and control buttons; the control buttons comprise a numeric keyboard and are used for inputting pressure and time parameters, an upper selection key, a lower selection key, a left selection key and a right selection key, selecting functions, confirming a button to confirm an execution instruction, modifying the buttons and setting parameters, tilting a bed head lifting button module frame I2-7, putting down a bed head lowering button module frame I2-7 and switching on and off a machine key.

Example II

The invention relates to a control method of a pressure injury prevention nursing bed with a plurality of modules, which comprises the following steps:

(1) pressure monitoring and alarming: the pressure threshold value and the alarm triggering time are set through the controller 3, the digital-to-analog converter 3-4 converts the pressure threshold value and the alarm triggering time into electric signals to be transmitted to the PLC3-3, the pressure sensor 2-4 collects the pressure signals to be transmitted to the transmitter 2-20, the transmitter 2-20 converts the pressure signals into electric signals recognized by the PLC3-3, the PLC3-3 recognizes and compares the two pressure electric signals, and if the pressure value collected by the pressure sensor 2-4 is higher than the set pressure threshold value, the PLC3-3 enables the buzzer 3-5 to sound and alarm after the alarm triggering time is reached;

(2) lifting the module: presetting a pressure threshold value and a module descending trigger time, when the module rises for triggering time, the digital-to-analog converter 3-4 converts a pressure threshold value and alarm triggering time into electric signals to be transmitted to the PLC3-3, the pressure sensor 2-4 collects pressure signals to be transmitted to the transmitter 2-20, the transmitter 2-20 converts the pressure signals into electric signals recognized by the PLC3-3, the PLC3-3 recognizes and compares the two pressure electric signals, if the pressure of the mattress module 2-1 exceeds the pressure threshold value and reaches the module lifting triggering time, the PLC3-3 sends a signal to a control element of the electric push rod 2-5 to enable the mattress module 2-1 to descend, and after the module lifting triggering time is reached, the PLC3-3 sends a signal to a control element of the electric push rod 2-5 to enable the mattress module 2-1 to ascend and reset;

(3) the bed head is lifted: through a bed head lifting button and a bed head descending button on the control panel 3-2, the telescopic rods of the air cylinders 2-15 are extended to push the module frames I2-7 to tilt up by continuously pressing a control element of the bed head lifting button air cylinder 2-15, and the telescopic rods of the air cylinders 2-15 are retracted to push the module frames I2-7 to descend by continuously pressing a control element of the bed head descending button air cylinder 2-15.

The above-mentioned embodiments are merely descriptions of the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention, and various modifications and improvements made to the technical solutions of the present invention by those skilled in the art should fall into the protection scope of the present invention without departing from the design concept of the present invention, and the technical contents of the present invention as claimed are all described in the technical claims.

Claims

1. A pressure injury prevention care bed having a plurality of modules, characterized by: comprises a bed base frame, a module mattress and a controller;

the bed base frame comprises a bottom frame, a side plate frame, a front baffle, a rear baffle and side baffles; the bottom frame is a rectangular frame, and a cross beam I and a cross beam II are arranged in the frame; universal wheels are arranged at four corners of the lower part of the frame; the side plate frame is a rectangular frame formed by combining four plates, and the bottom surface of the side plate frame is fixed on the bottom frame; the front baffle is a square plate and is fixedly erected at the front end of the side plate frame, and the upper end of the front baffle is a round angle; the rear baffle is fixedly erected at the rear end of the side plate frame, the upper end of the rear baffle is provided with a fillet, and the height of the rear baffle is half of that of the front baffle; the side baffle plates are four rectangular plates and are connected with the side surfaces of the side plate frames in a vertical sliding manner;

the modular mattress comprises a mattress module and a module frame; the mattress module comprises a soft cushion, a pressure sensor and an electric push rod; the soft cushion is a square cushion, a rectangular plate gasket is arranged on the bottom surface, a pressure sensor is arranged in the center of the lower bottom surface of the gasket, and an electric push rod is connected below the pressure sensor; the module frame comprises a module frame I and a module frame II; the bottom surfaces of the module frame I and the module frame II are rectangular frames, square strip supporting mattress modules are arranged in the rectangular frames, n-shaped frames are arranged on the rectangular frames, and the n-shaped frames and the rectangular frames are supported by a plurality of stand columns; the front ends of two arms of the n-shaped frame of the module frame I and the module frame II are movably hinged through a shaft lever; the module frame II is fixed on the bottom frame and is close to the rear baffle; the module frame I is placed on the bottom frame, and a lifting mechanism is arranged on one square strip in the rectangular frame and connected with the cross beam I; the mattress modules are linearly arrayed in the module frame I and the module frame II to form a module mattress, and the base of the electric push rod is fixed on the upper surface of the square strip;

2. A pressure injury prevention care bed having a plurality of modules as recited in claim 1, wherein: four vertical columns with T-shaped sections are fixed on two sides of the side plate frame respectively, a rectangular sheet-side baffle supporting sheet is fixed on the lower bottom surface of each T-shaped column, and a row of threaded holes are formed in the outer side surface of each T-shaped column; two rectangular columns are arranged on the inner sides of the side baffles, T-shaped grooves matched with the T-shaped columns are formed in the rectangular columns, and circular through holes are formed in the bottom surfaces of the T-shaped grooves; the T-shaped column body is matched with the T-shaped groove, and a knob is arranged in the circular through hole and matched with the threaded hole.

3. A pressure injury prevention care bed having a plurality of modules as recited in claim 1, wherein: the side baffle is provided with a long groove above the cuboid column.

4. A pressure injury prevention care bed having a plurality of modules as recited in claim 1, wherein: the lifting mechanism comprises a connecting block I, an air cylinder, a connecting block II and a connecting block III; the connecting block I is two rectangular blocks fixed on the lower surfaces of the square strips, circular holes are formed in the side walls of the rectangular blocks, bolt and nut I are arranged on the circular holes, and telescopic rods of the air cylinders penetrate through the bolts and are movably hinged with the connecting block I; the cylinder base is fixedly provided with a connecting block II, and the connecting block II is a rectangular block with a round hole on the convex side wall of the rectangular plate; connecting block III fixes on the side of crossbeam I, and connecting block III is the rectangle piece, and the upper surface of lifting the piece is equipped with two bellied rectangle pieces, and it has the round hole to open on the rectangle piece lateral wall, and bolt nut II passes connecting block II, connecting block III's round hole and makes connecting block II, connecting block III form the activity articulated.

5. A pressure injury prevention care bed having a plurality of modules as recited in claim 1, wherein: the control panel comprises a display and a control button; the control buttons comprise a numeric keyboard, an upper selection key, a lower selection key, a left selection key, a right selection key, a confirmation button, a modification button, a bed head lifting button, a bed head descending button and a switch key.

6. A pressure injury prevention care bed having a plurality of modules as recited in claim 1, wherein: the pressure sensor is connected with a transmitter.

7. The method for controlling the pressure injury prevention nursing bed with a plurality of modules as claimed in claims 1-6, comprising the following steps: