CN117503538B - Air mattress capable of automatically implementing prone position ventilation auxiliary treatment and control system thereof - Google Patents

Abstract

The invention discloses an air mattress capable of automatically implementing prone position ventilation auxiliary treatment and a control system thereof. The advantage utilizes each region to control odd-even alternately to fill gassing, realize prone position and normal automatic switch of position of lying on back, the complex operation when having solved current device prone position and position of lying on back and switch over, need the inconvenient problem of manual adjustment operation, static mattress on the pad body has been increaseed simultaneously, support area pressure distribution is more even, it fills gassing to carry out odd-even circulation in turn to the region that the gas strip formed through three way solenoid valve, but head, shoulder dynamic fluctuation decompression when realizing prone position and normal automatic switch over of position control of lying on back, but no straight pressurized position, through gassing the cavity at three cavity gas strip middle parts of thorax department again, play the effect of decompressing patient's thorax portion, improve prone position mechanical ventilation's effect.

Description

Air mattress capable of automatically implementing prone position ventilation auxiliary treatment and its control system

Technical Field

The present invention specifically relates to an air mattress and a control system capable of automatically implementing prone position ventilation auxiliary treatment.

Background technique

Severe COVID-19 patients are often accompanied by acute respiratory distress syndrome. Acute respiratory distress syndrome (ARDS) refers to a syndrome of acute respiratory failure caused by severe diseases inside and outside the lungs, with diffuse damage to pulmonary capillaries and increased permeability as the basis, pulmonary edema, hyaline membrane formation and atelectasis as the main pathological changes, and progressive respiratory distress and refractory hypoxemia as the clinical features. ARDS is a typical manifestation of the late stage of acute lung injury. The disease has an acute onset, rapid development, extremely poor prognosis, and a mortality rate of more than 50%. The key to the treatment of ARDS lies in the primary disease and its cause, such as handling the trauma well, finding the infection focus sooner or later, and using sensitive antibiotics against the pathogenic bacteria to stop the inflammatory response from further damaging the lungs; more urgently, it is necessary to correct the patient's severe hypoxia in time to win precious time for the treatment of the underlying disease, among which the main treatment method is mechanical ventilation;

The "New Coronavirus Diagnosis and Treatment Plan (Trial Tenth Edition)" issued by the General Office of the National Health Commission pointed out that for the treatment of severe and critical patients, especially severe ARDS patients, prone ventilation should be performed for more than 12 hours a day if human resources are sufficient. Prone ventilation is to use turning equipment or manual operation to allow patients to undergo mechanical ventilation in the prone position to improve the oxygenation capacity of ARDS patients. However, when prone ventilation is used for treatment, patients are in the prone position for more than 12 hours every 24 hours. Long-term prone treatment under intensive care leads to an increased frequency of pressure injuries, which can lead to prolonged hospitalization, patient pain, possible surgical intervention, and increased nursing costs. Prevention of pressure injuries in body parts such as the face, chest, perineum, knee joints and toes, which are not at risk when the patient is in the supine position, but face great risks when the patient is in the prone position;

At present, there are a few imported brands of anti-bedsore air mattresses on the market that can achieve prone ventilation function, but they all have many shortcomings and cannot be fully promoted and applied. The prone ventilation air mattresses on the existing market mainly achieve the prone mechanical ventilation function by adjusting the air pressure regulating valve of a single air chamber to inflate and deflate a certain air chamber. When switching between prone and supine positions, this structure requires too many manually operated regulating valves, and adjusting the degree of deflation requires experience, and the replicability is not strong; at the same time, this device has no support for the patient's head at all, and the patient's shoulders are always supported by force, and all the pressure is on the shoulders, which makes the patient's shoulders prone to bedsores; in addition, the existing devices are not designed to decompress the patient's chest and abdominal cavities, and the chest and abdomen feel strong. The pressure, especially the pressure on the chest cavity, will squeeze the lungs and affect the effect of prone mechanical ventilation.

In Chinese patent 202120598348.0, the title is a nursing mattress for critically ill patients with prone position ventilation and prevention of pressure sores, which includes a pad body, characterized in that: the nursing mattress also includes a bronchus, a regulating valve, a main air pipe, and a trachea joint. The mattress body is provided with a calf adjustment area, a thigh adjustment area, a hip adjustment area, an abdominal vacant area, a chest adjustment area, a chest lifting area, an intubation area, and a head adjustment area from one end in sequence; a number of auxiliary airbags are provided in the calf adjustment area, the thigh adjustment area, and the chest adjustment area; a hip airbag is provided inside the hip adjustment area, and a hip airbag through groove is provided in the middle of the hip airbag, a chest airbag is provided inside the chest lifting area, and a chest airbag through groove is provided in the middle of the chest airbag, and a number of head airbags are provided in the head adjustment area; the auxiliary airbag, hip airbag, chest airbag, and head airbag are connected to the bronchus and then connected to the main airway, the bronchus is provided with a regulating valve, and the main airway is provided with a trachea joint.

As shown in the attached figure of patent 202120598348.0, this patent mainly utilizes the inflating of multiple airbags to achieve fitting to the human body and realize the function of prone position, but the adjustment of different airbags requires adjusting the regulating valve on each bronchus. This structure requires too many manually operated regulating valves, and the adjustment of the degree of deflation requires experience, and the replicability is not strong. At the same time, the patient's chest and abdominal cavities are not designed for decompression. The chest and abdominal oppression is strong, especially the chest cavity is compressed, which will squeeze the lungs and affect the effect of mechanical ventilation in the prone position.

Summary of the invention

The technical problem to be solved by the present invention is that the existing device mentioned in the background technology has no chest decompression design, resulting in a strong sense of chest and abdominal oppression, and the existing device is cumbersome to operate when switching between prone and supine positions, and requires manual adjustment, which is inconvenient to use.

In order to solve the problem that the above-mentioned existing devices are complicated to operate when switching between prone and supine positions, and need to be manually adjusted and are inconvenient to use, the present invention proposes a control system that can automatically implement a prone ventilation-assisted treatment air mattress; it is achieved through the following technical solutions: a control system that can automatically implement a prone ventilation-assisted treatment air mattress, including a data acquisition unit, which is used to collect pressure data of each air strip in the mattress body and the opening and closing conditions of each three-way solenoid valve, and then send the collected results to a data processing unit;

The pressure data includes the current pressure data, the highest pressure data, the lowest pressure data, the duration of each pressure data and the switching duration between two different pressure data of the gas bar during the process from the start to the stop of the device;

The opening and closing data of the three-way solenoid valve includes the opening and closing time of each interface of the three-way solenoid valve, as well as the duration of opening and closing;

The data processing unit is used to send relevant parameter instructions to the control unit according to the preset parameters selected on the touch screen, and the control unit sends an operation instruction to the three-way solenoid valve connected to the air pump, the operation instruction includes the opening and closing time of the air pump and the opening and closing time of each interface of the three-way solenoid valve and the duration of keeping the opening and closing, and the data packet generated by the operation instruction is sent to the data analysis unit, and the data packet is marked by the activation time, and each group of data under this parameter collected by the data acquisition unit is sent to the data analysis unit;

The data analysis unit is used to analyze and judge the corresponding parameter data in each data packet sent by the data processing unit, and compare and analyze the data generated by the preset parameters after execution with the standard data. According to the comparison and analysis results, the abnormal value of a certain point in the corresponding data packet is obtained, and the importance of the abnormal value is judged. Finally, it is sent to the touch screen pop-up window for reminder. For severe abnormalities, the data analysis unit sends a signal to stop the equipment operation to the control unit, and the control unit sends a stop operation instruction to the equipment. The data analysis method is as follows:

A1. According to the preset parameters executed, the standard data corresponding to the parameters are called out, and the current pressure data in the data packet collected by the data acquisition unit is marked as Yt, the highest pressure data is marked as Yh, the lowest pressure data is marked as Yl, the pressure holding time is marked as Yb, and the pressure data conversion time is marked as Yz;

A2. Then compare Yt, Yh, Yl, Yb and Yz with the standard data Bt, Bh, B¬l, Bb and Bz.

If Yt, Yh, Yl, Yb and Yz are within the range of Bt, Bh, B¬l, Bb and Bz, it is normal;

If Yt, Yh, Yl, Yb and Yz are not within the range of Bt, Bh, B¬l, Bb and Bz, the difference is calculated by the formulas Ct=Bt-Yt, Ch=Bh-Yh, Cl=Bl-Yl, Cb=Bb-Yb and Cz=Bz-Yz;

A3. Compare Ct, Ch, Cl, Cb and Cz according to the abnormal value range to determine the degree of abnormality. The degree of abnormality includes mild abnormality, moderate abnormality and severe abnormality. Mild abnormality, moderate abnormality and severe abnormality will prompt the touch screen to pop up a window to remind maintenance and record the abnormal value. For severe abnormality, the control unit will send a command to the device to stop the device operation.

In the preferred embodiment of the technical solution of the present invention, the data analysis unit generates and saves statistical line graphs of past data of _Ct , _Ch , _Cl , _Cb and _Cz respectively, and retrieves and views them through the touch screen. Such a setting is convenient for determining the service life of different gas strips, three-way solenoid valves and air guide pipes in the device, and is also convenient for finding problem points during maintenance, and is easy to use.

In the present invention, each area can be used to independently control the odd-even alternating inflation and deflation, so as to realize the automatic switching of the prone position and the normal supine position control, thereby solving the problem that the switching between the prone position and the supine position of the existing device is cumbersome and requires manual adjustment and inconvenient operation.

In order to solve the problem that the above-mentioned existing devices have no chest decompression design and the chest and abdominal oppression feeling is strong, the present invention proposes an air mattress that can automatically implement prone ventilation assisted therapy; it is achieved by the following technical scheme: an air mattress that can automatically implement prone ventilation assisted therapy, including a main unit and a cushion body, the cushion body is laid on the bed, the main unit and the cushion body are connected through an air duct, an air pump connected to the air duct is arranged in the main unit, and the air pump performs cyclic inflation and deflation operations on different chambers in different air strips in the cushion body through the air duct and a three-way solenoid valve.

In the present invention, a static mattress is utilized on the upper layer of the cushion body to increase the supporting area and make the pressure distribution more uniform. At the same time, the area formed by the air strip is inflated and deflated in an odd-even alternating cycle through a three-way solenoid valve, so that the automatic switching of the prone position and the normal supine position control can be realized. At the same time, the head and shoulders can be dynamically fluctuated to reduce the pressure, and there is no part that is always under pressure. Finally, by deflating the chamber in the middle of the three-chamber air strip arranged at the chest cavity, the chest cavity of the patient is decompressed, thereby improving the effect of mechanical ventilation in the prone position.

Preferably, the cushion body comprises a static decompression layer, an air chamber layer and a support layer, wherein the static decompression layer, the air chamber layer and the support layer are stacked together in sequence, wherein the static decompression layer and the support layer are in the upper and lower layers, and the air chamber layer is in the middle layer. The arrangement of the static decompression layer facilitates increasing the support area, making the pressure distribution more uniform, thereby improving the patient's comfort and slowing down the occurrence of pressure sores.

Preferably, the air chamber layer includes a plurality of air strips arranged in parallel, the air strips including a single-chamber air strip, a first double-chamber air strip, a second double-chamber air strip and a three-chamber air strip, one first double-chamber air strip is provided, and a plurality of the single-chamber air strip, the second double-chamber air strip and the three-chamber air strip are provided. The provision of a plurality of air strips facilitates the control of different positions by individually controlling the plurality of air strips, and facilitates the switching between the prone position and the supine position.

Preferably, a space is provided at the connecting part of the two chambers of the second double-chamber air strip, and the space cannot be inflated. Such a setting facilitates the decompression of the patient's neck, abdomen and perineum or sacrum and coccyx in suspension, thereby avoiding pressure sores in these areas.

Preferably, each individual chamber of the single-chamber gas strip, the first double-chamber gas strip, the second double-chamber gas strip and the three-chamber gas strip is connected to the air duct through a three-way solenoid valve. Such an arrangement facilitates the control of the inflation and deflation of each individual chamber through the three-way solenoid valve, thereby improving the controllability of the device and facilitating use.

Preferably, the chamber formed by multiple air strips is divided into a head area, a central area odd, a central area even, a conventional area odd and a conventional area even. The five areas are connected in parallel through five three-way solenoid valves, and air is supplied by the same air pump. The odd and even alternating cycles of inflation and deflation of three of the areas are controlled by controlling the on and off of the five three-way solenoid valves. The setting of odd and even alternating cycles of inflation and deflation can achieve dynamic fluctuation decompression, and effectively prevent pressure sores.

Preferably, the main unit includes a touch screen, a main control board, an air pump, a three-way solenoid valve and a pressure sensor, wherein the touch screen, the air pump, the three-way solenoid valve and the pressure sensor are respectively connected to the main control board, and the pressure sensor includes a first pressure sensor and a second pressure sensor, wherein the first pressure sensor is connected to the first double-chamber air strip, and the second pressure sensor is connected to the single-chamber air strip, the second double-chamber air strip and the three-chamber air strip through an air duct. Such an arrangement facilitates the control of the inflation amount of the air strip and is convenient to use.

Compared with the prior art, the present invention has the following beneficial effects:

According to the technical solution of the present invention, each area can be individually controlled to be inflated and deflated in an odd-even alternating manner, so as to realize automatic switching of prone position and normal supine position control, thereby solving the problem that the prior device is cumbersome to operate when switching between prone position and supine position, and requires manual adjustment and inconvenient operation. At the same time, the static mattress on the upper layer of the cushion body is utilized to increase the support area and make the pressure distribution more uniform. At the same time, the area formed by the air strip is inflated and deflated in an odd-even alternating manner through a three-way solenoid valve, so as to realize automatic switching of prone position and normal supine position control, and at the same time, the head and shoulders can be dynamically fluctuated to reduce pressure, and there is no part that is always under pressure. Finally, by deflating the chamber in the middle of the three-chamber air strip arranged in the chest cavity, the chest cavity of the patient is decompressed, thereby improving the effect of mechanical ventilation in the prone position.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a three-dimensional schematic diagram of the present invention;

FIG2 is a schematic diagram of the interior of the pad body;

Fig. 3 is a distribution diagram of the air chamber layer;

FIG4 is a connection diagram of the air pump, the three-way solenoid valve and the chamber;

Fig. 5 is a flow chart of the control system;

Figure 6 is a touch screen general parameter setting interface;

Figure 7 is a schematic diagram of the main control board connection;

Explanation of the accompanying drawings: 1-host, 11-touch screen, 12-air duct, 13-main control board, 14-air pump, 15-three-way solenoid valve, 16-first pressure sensor, 17-second pressure sensor, 2-cushion body, 21-static decompression layer, 22-air chamber layer, 23-support layer, 24-air strip, 25-single-chamber air strip, 26-first double-chamber air strip, 27-second double-chamber air strip, 28-three-chamber air strip, 29-fixing belt.

Detailed ways

The technical solution in the embodiment of the present invention will be described in detail below with reference to Figures 1-7 in the embodiment of the present invention.

Example 1

As shown in FIG1 , an air mattress and control system capable of automatically implementing prone position ventilation-assisted therapy mainly comprises a main unit 1 , a cushion body 2 and a control part. The cushion body 2 is placed on the bed body. The main unit 1 is mainly connected to the cushion body 2 through an air duct 12 .

As shown in FIGS. 1 , 5 and 7 , the control part includes a data acquisition unit, a data processing unit, a data analysis unit and a control unit, and the control part is integrated in the main control board 13 as a whole.

The collection unit is mainly used to collect the pressure data in each gas strip 24 in the cushion body 2 and the opening and closing conditions of each three-way electromagnetic valve 15, and then send the collected results to the data processing unit.

The pressure data respectively include the current pressure data, the highest pressure data, the lowest pressure data of the gas strip 24 during the process from starting to stopping the device, the duration of each pressure data, and the conversion duration between two different pressure data. In addition, the opening and closing status data of the three-way solenoid valve 15 include the opening and closing time of each interface of the three-way solenoid valve 15, as well as the duration of opening and closing.

The data required by the data processing unit and the data analysis unit can be collected by the collection unit.

The data processing unit is used to send relevant parameter instructions to the control unit according to the preset parameters selected on the touch screen 11, and the control unit sends operation instructions to the three-way solenoid valve 15 connected to the air pump 14. The operation instructions include the opening and closing time of the air pump 14 and the opening and closing time of each interface of the three-way solenoid valve 15 and the duration of keeping open and closed. The data packet generated by this operation instruction is sent to the data analysis unit. In addition, the data processing unit will enable time marks for different pairs of data packets, and at the same time send each group of data under this parameter collected by the data acquisition unit to the data analysis unit, and the data analysis unit will analyze and judge the data.

The data analysis unit is mainly used to analyze and judge the corresponding parameter data in each data packet sent by the data processing unit, and compare and analyze the data collected after the preset parameters are executed with the standard data, obtain the abnormal value of a certain point in the corresponding data packet according to the comparison analysis and judgment result, and judge the importance of the abnormal value, and finally send it to the touch screen 11 for pop-up reminder. For severe abnormalities, the data analysis unit sends a signal to stop the equipment operation to the control unit, and the control unit sends a stop operation instruction to the equipment. The data analysis method is as follows:

A1. According to the preset parameters to be executed, the standard data corresponding to the parameters at each node is called out, and then the data in the data packet collected by the data acquisition unit is marked, wherein the current pressure data is marked as Y _t , the highest pressure data is marked as Y _h , the lowest pressure data is marked as Y _l , the pressure holding time is marked as Y _b , and the pressure data conversion time is marked as Y _z ;

A2. Then compare Y _t , Y _h , Y _l , Y _b and Y _z with the standard data B _t , B _h , B _l , B _b and B _z . If Y _t , Y _h , Y _l , Y _b and Y _z are within the range of B _t , B _h , B _l , B _b and B _z , it is normal.

If _Yt , _Yh , _Yl , _Yb and _Yz are not within the range of _Bt , _Bh , _Bl , _Bb and _Bz , the difference is calculated by the formulas _Ct = _{Bt - Yt, Ch = Bh - Yh, Cl = Bl - Yl , Cb = Bb - Yb and Cz = Bz - Yz ;}

A3. Compare _Ct , _Ch , _Cl , _Cb and _Cz according to the abnormal value range to determine the abnormality level of the abnormal value. The abnormality levels include mild abnormality, moderate abnormality and severe abnormality. Mild abnormality, moderate abnormality and severe abnormality will prompt the touch screen 11 to pop up a window to remind maintenance and record the abnormal value. For severe abnormality, the control unit sends a command to stop the device.

In order to understand in detail the service life and connection conditions of different gas strips 24, three-way solenoid valves 15 and air guide pipes 12 in the equipment and to facilitate finding problem points during maintenance, the data analysis unit generates and saves statistical line graphs of past data of C _t , _Ch , C _l , C _b and C _z respectively, and this statistical line graph can be retrieved and viewed through the touch screen 11.

The host 1 includes a touch screen 11, a main control board 13 and an air pump 14. The main control board 13 and the air pump 14 are arranged inside the host 1. The touch screen 11 is arranged on the surface of the host 1 and is connected to the main control board 13. The air pump 14 is connected to the main control board 13. At the same time, the air pump 14 is also connected to the air chamber layer 22 in the cushion body 2 through the air guide pipe 12.

As shown in Figures 2, 3 and 7, the cushion body 2 is divided into three layers, namely a static decompression layer 21, an air chamber layer 22 and a support layer 23. The static decompression layer 21, the air chamber layer 22 and the support layer 23 are stacked together in sequence, wherein the static decompression layer 21 and the support layer 23 are in the upper and lower layers, and the air chamber layer 22 is in the middle layer. The three are bonded together in pairs and then uniformly wrapped and closed with a closable cloth cover, and an installation port for connecting the air guide tube 12 is opened on the side of the cloth cover.

The support layer 23 is arranged on the bottom layer of the cushion body 2 and is mainly made of high-density sponge. The support layer 23 is in contact with the bed board and plays a supporting role.

The static decompression layer 21 is arranged on the upper layer of the cushion body 2 and is mainly made of corrugated decompression cotton. The static decompression layer 21 is in contact with the patient to ensure that when all the air strips 24 are not inflated, the upper surface of the cushion body 2 can maintain a complete and flat cushion body.

The air chamber layer 22 is arranged between the support layer 23 and the static decompression layer 21. The air chamber layer 22 is composed of a plurality of inflatable air strips 24 arranged in parallel along the length direction of the static decompression layer 21. The plurality of air strips 24 are fixed together in series by two fixing belts 29, which effectively prevents the air strips 24 from sliding in the cushion body 2.

Definition: When the patient of the static decompression layer 21 lies flat, the direction of the patient's height is the length direction of the static decompression layer 21, and the direction from the patient's left hand to the right hand is the width direction.

The air strip 24 is mainly divided into four categories according to its shape, namely, a single-chamber air strip 25, a first double-chamber air strip 26, a second double-chamber air strip 27 and a three-chamber air strip 28. Among them, the single-chamber air strip 25 is a conventional air strip, and the whole strip is a hollow chamber. The first double-chamber air strip 26 is divided into two hollow chambers in the middle as a whole. The second double-chamber air strip 27 is also divided into two hollow chambers in the middle as a whole. The difference from the first double-chamber air strip 26 is that the two separated chambers of the second double-chamber air strip 27 have a gap of 5-10 cm at the separation, and the patient's neck, abdomen and perineum or sacrum are placed in this gap. When the two chambers of the second double-chamber air strip 27 are inflated, this gap remains flat and not inflated. At this time, the patient's neck, abdomen and perineum or sacrum are suspended in the air to reduce decompression, and at the same time, it also effectively avoids pressure sores in these parts.

The entire three-chamber air strip 28 is separated from the middle into three hollow chambers. The center and both ends of the three-chamber air strip 28 can be inflated and deflated separately, and the center portion is not inflated when the patient is in the prone position.

As shown in Figures 3 and 4, 21 air strips 24 are selected for introduction in this embodiment. The number of air strips 24 can be adjusted according to different specifications. In this embodiment, one first double-chamber air strip 26 is provided, which is mainly used to support the patient's head. Generally, only one first double-chamber air strip 26 is required for various specifications. For easy distinction, the first double-chamber air strip 26 is numbered 1.

There are six second double-chamber air strips 27, which are mainly used to suspend the neck, abdomen and perineum or sacrum and coccyx to decompress and avoid pressure sores in these parts. The second double-chamber air strips 27 are numbered 4, 9-13 respectively.

There are four three-chamber air strips 28, which are numbered 5-8 respectively. The central part of the three-chamber air strips 28 is not inflated in the prone position, ensuring that the entire chest cavity is in a suspended state in the prone position. The shoulders are supported by the second double-chamber air strip 27 No. 4, the abdomen is supported by the second double-chamber air strips 27 No. 9-12, and the ribs are supported by the chambers at both ends of the three-chamber air strips 28 No. 5-8, thereby achieving decompression of the patient's chest cavity and improving the effect of mechanical ventilation in the prone position.

In order to prevent the occurrence of pressure sores and facilitate the control system to control the odd-even fluctuations to achieve dynamic fluctuation decompression, all air strips 24 are divided into 3 areas according to their functions. Each area can control the odd-even fluctuations individually, that is, the zoning fluctuations:

Air strip No. 1 24, i.e., the first double-chamber air strip 26 is a separate head area. Since it is a single air strip, unlike the traditional odd-even alternation, the entire air strip is always inflated. The hardness of the air strip is changed by controlling its air pressure value (full air pressure value-half air pressure value-full air pressure value-half air pressure value), thereby changing the pressure area and the pressure point. It is divided into two chambers in the middle to relieve the feeling of oppression on the forehead at the full air pressure value, increase the contact area, and provide a more comfortable experience. Such alternating cycles can not only ensure that the entire top of the head is always in a supported state, but also make the pressure parts change alternately and cyclically.

The central chamber of the No. 2-3 air strips 24 and the No. 5-8 air strips 24 is the central area, which alternates between odd and even normally in the supine position, and is not inflated at all in the prone position. Therefore, when other areas are inflated, the face and chest are suspended in the air, ensuring the effect of mechanical ventilation; at the same time, in order to ensure the effect of suspended decompression, the upper static decompression layer 21 is opened and left empty in these areas, and the outer cloth cover has elastic margins in these areas.

The remaining air strips 24 are regular areas, with normal odd-even alternation regardless of the prone or supine position. However, since there are more uninflated suspended air strips 24 in the prone position, in order to ensure that the chest cavity never touches the bottom during the odd-even alternation, the chambers at both ends of air strips 4 24, 9-11, and 5-8 24 are not arranged in odd-even arrangement with the entire air strip 24, but are defined as odd-numbered chambers and even-numbered chambers at both ends, and arranged crosswise, that is, the chambers at both ends of 4-11 are odd-even-odd-even-odd-even-odd at one end, and even-odd-even-odd-odd-odd at the other end.

In order to facilitate the control of each chamber on each gas strip 24, each chamber is connected to the gas guide pipe 12 and the three-way solenoid valve 15 in the following manner.

The air pump 14 is connected to the interface 1 of the three-way solenoid valve 15 through the air guide tube 12, and the interface 2 of the three-way solenoid valve 15 is connected to the chamber through the air guide tube 12. When the air pump 14 is working, the three-way solenoid valve 15 is energized, and the interface 1 and interface 2 of the three-way solenoid valve 15 are connected, and the air pump 14 can inflate the chamber through the three-way solenoid valve 15; when deflation is required, the three-way solenoid valve 15 is de-energized, and the interface 2 and interface 3 of the three-way solenoid valve 15 are connected, and the gas in the chamber is discharged into the atmosphere through the three-way solenoid valve 15. The chambers in the three areas are respectively connected to five three-way solenoid valves 15, namely the head area, the central area odd, the central area even, the regular area odd, and the regular area even. The interfaces 1 of the five three-way solenoid valves can be connected in parallel, and the air is supplied by the same air pump. The odd and even alternating cycles of charging and deflation of the three areas are controlled by controlling the on and off of the five solenoid valves.

As shown in FIGS. 1 , 5 and 6 , in this embodiment, the operation of the entire device through the touch screen 11 is as follows:

The touch screen 11 is a conventional parameter setting interface, which is divided into three main parts: parameter setting, mode selection, and work control. The left side of the parameter setting is the parameter setting of the odd-numbered chambers. The air pressure is adjusted to set different maximum inflation pressures according to people of different weights. For example, less than 60kg is set to level 1, 60-90kg is set to level 2, and more than 90kg is set to level 3. Level 1 has the lowest pressure and level 3 has the highest pressure, ensuring that the air mattress is at a similar height for people of different weights. The inflation time is the total time from the start of inflation to the continuous maintenance of the maximum pressure. After the inflation time reaches the set value, the chamber begins to deflate. The deflation time is the total time from the start of deflation to the start of inflation in the next cycle. After the deflation time reaches the set value, inflation begins.

On the right is the parameter setting of the even-numbered chambers, which is exactly the same as the setting method of the odd-numbered air chambers. The pressure level and the inflation and deflation time can be the same or different. In this way, the odd-numbered chambers and the even-numbered chambers are inflated and deflated in a reciprocating cycle, continuously changing the pressure point to reduce the occurrence of pressure sores. The fluctuation mode can select the prone mode or the supine mode. The supine position is the normal mode, and the chambers fluctuate uniformly. The prone mode is a special position mode, which is used for prone ventilation-assisted treatment. In this mode, the central area mode does not work. The specific control is implemented through the logic control of the single-chip microcomputer program of the main control board 13, and the working control is used to start or terminate the operation of the air mattress.

As shown in Figures 5, 6 and 7, the connection diagram of the main control board 13 and the use process of this embodiment are as follows:

There is an air pump interface, 5 solenoid valve interfaces and 2 pressure sensors on the main control board 13. The 5 solenoid valve interfaces are respectively connected to 5 three-way solenoid valves 15, which are numbered 1-5 respectively. The first pressure sensor 16 is connected to the short interface of the No. 2 three-way solenoid valve 15 in the head area through the air guide tube 12. The second pressure sensor 17 is connected to the common gas cavity from the air pump 14 to 1 end of all the three-way solenoid valves 15 through the air guide tube 12. The air pump interface is connected to the air pump 14 to control the on-off and inflation speed of the air pump 14. The solenoid valve interface is respectively connected to the three-way solenoid valves 15 at five groups of chambers in the head area, the central area odd, the central area even, the regular area odd and the regular area even. The pressure sensor reads the pressure value of the chamber. After reaching the set value, it controls the on-off state of the air pump 14 and the three-way solenoid valve 15 to change the working mode. Take the prone position as an example:

Set the air pressure level, inflation time and deflation time, select the wave mode as the prone mode, press the start button to start working, at this time the air mattress enters the pre-inflation state, the air pump 14 starts working to inflate the chamber through the three-way solenoid valve 15, the three-way solenoid valves 1, 4, 5 are energized (in the prone position, the solenoid valves 2 and 3 are always in the power-off state, that is, the central area is never inflated, so that the chest and face are in a pressure-free state), and the head area and the conventional area are inflated; after several minutes of pre-inflation, the pressure sensor reads that the chamber pressure reaches the set maximum pressure value. At this time, all the chambers in the head area and the conventional area are in a fully inflated state and enter the odd-even alternating inflation and deflation cycle stage, the air pump enters the pressure maintaining working mode, the three-way solenoid valves 1 and 4 are powered off, the head area chamber and the odd-numbered chambers in the conventional area begin to deflate, and the cycles of the two areas are independent of each other.

Head area circulation: When the head area enters the deflation stage, the first pressure sensor 16 can read the pressure value of the head area chamber independently. When the pressure value reaches half of the set value, the deflation ends, the three-way solenoid valve 15 is energized, and the inflation stage is re-entered. At this time, due to the low pressure in the head area, the value read by the first pressure sensor 16 will also be lower than the set maximum pressure value, and the air pump 14 re-enters the inflation mode. The circulation of the head area is only affected by the pressure of the first pressure sensor 16 and the second pressure sensor 17 reaching the threshold to switch the inflation and deflation, and is unrelated to the inflation and deflation time setting value on the parameter setting interface.

Conventional area cycle: When the conventional area enters the deflation stage, the conventional area odd starts to deflate, and the conventional area even remains inflated. At this time, the pressure is evenly distributed on the conventional area even chamber; when the deflation time reaches the set value, it enters the conventional area odd inflation stage, the conventional area odd starts to inflate, and the conventional area even remains inflated. At this time, the pressure is evenly distributed on all chambers in the conventional area; when the inflation time reaches the set value, it enters the conventional area even deflation stage, the conventional area even starts to deflate, and the conventional area odd remains inflated. At this time, the pressure is evenly distributed on the conventional area odd chamber; when the deflation time rewinds to the set value, it enters the conventional area even inflation stage, the conventional area even starts to inflate, and the conventional area odd remains inflated. At this time, the pressure is evenly distributed on all chambers in the conventional area; when the inflation time reaches the set value, it re-enters the conventional area odd deflation stage to start the next cycle.

If the wave mode is selected as the supine position mode, the circulation method is similar to the prone position, the difference is that the central area also enters the wave circulation, and the No. 2 and No. 3 three-way solenoid valves 15 are also opened during pre-inflation. At the end of pre-inflation, all chambers are in a gas-filled state, and the central area circulation and the regular area circulation actions are exactly the same, that is, the central area odd and the regular area odd are linked together, and the central area even and the regular area even are linked together.

The above embodiments are only for illustrating the technical idea of the present invention, and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the present invention.

Claims (4)

1. A control system for an air mattress capable of automatically implementing a prone position ventilation-assisted treatment, characterized in that the air mattress capable of automatically implementing a prone position ventilation-assisted treatment comprises: a main unit (1) and a cushion body (2), the cushion body (2) being laid on a hospital bed, the main unit (1) and the cushion body (2) being connected via an air duct (12), an air pump (14) connected to the air duct (12) being arranged in the main unit (1), the air pump (14) performing cyclic inflation and deflation operations on different chambers in different air strips (24) in the cushion body (2) via the air duct (12) and a three-way solenoid valve (15); a plurality of air strips (24) in the cushion body (2) The chambers formed by (24) are divided into a head area, a central area odd, a central area even, a regular area odd and a regular area even. The five areas are connected in parallel through five three-way solenoid valves (15), and air is supplied through the same air pump (14). The five three-way solenoid valves (15) are controlled to be turned on and off to control the odd and even alternating cycles of filling and deflation of three of the areas; the cushion body (2) includes a static decompression layer (21), an air chamber layer (22) and a support layer (23), wherein the static decompression layer (21), the air chamber layer (22) and the support layer (23) are sequentially stacked together, wherein the static decompression layer (21) 1) and a support layer (23) are in the upper and lower layers, and an air chamber layer (22) is in the middle layer; the air chamber layer (22) comprises a plurality of air strips (24) arranged in parallel, the air strips (24) comprising a single-chamber air strip (25), a first double-chamber air strip (26), a second double-chamber air strip (27) and a three-chamber air strip (28); the single-chamber air strip (25) is a hollow chamber as a whole, the first double-chamber air strip (26) is separated from the middle into two hollow chambers as a whole, and the second double-chamber air strip (27) is separated from the middle into two hollow chambers as a whole, and compared with the first double-chamber air strip (26), A 5-10 cm interval is left between the two separated chambers of the second double-chamber air strip (27); the three-chamber air strip (28) is divided into three hollow chambers from the middle as a whole; the chambers at the center and both ends of the three-chamber air strip (28) can be inflated and deflated separately, and the central part is not inflated when the patient is in a prone position; the first double-chamber air strip (26) is provided with one, and the single-chamber air strip (25), the second double-chamber air strip (27) and the three-chamber air strip (28) are provided with multiple; a gap is provided at the connecting part of the two chambers of the second double-chamber air strip (27), and the gap cannot be inflated; The control system comprises: A data collection unit, used to collect pressure data of each gas strip (24) in the cushion body (2) and the opening and closing conditions of each three-way solenoid valve (15), and then send the collected results to the data processing unit; The pressure data respectively include the current pressure data, the highest pressure data, the lowest pressure data of the gas bar (24) during the process from starting to stopping the device, as well as the duration of each pressure data being maintained and the duration of switching between two different pressure data; The opening and closing status data of the three-way solenoid valve (15) include the opening and closing time of each interface of the three-way solenoid valve (15), and the duration of maintaining the opening and closing; The data processing unit is used to send relevant parameter instructions to the control unit according to the preset parameters selected on the touch screen (11), and the control unit sends an operation instruction to the three-way solenoid valve (15) connected to the air pump (14), the operation instruction including the opening and closing time of the air pump (14) and the opening and closing time of each interface of the three-way solenoid valve (15) and the duration of keeping the opening and closing, and sends the data packet generated by the operation instruction to the data analysis unit, marks the data packet by the activation time, and sends each group of data under the parameter collected by the data collection unit to the data analysis unit; The data analysis unit is used to analyze and judge the corresponding parameter data in each data packet sent by the data processing unit, and compare and analyze the data generated by the preset parameters after execution with the standard data, obtain the abnormal value of a certain point in the corresponding data packet based on the comparison analysis and judgment result, and judge the importance of the abnormal value, and finally send it to the touch screen (11) to pop up a window reminder. For severe abnormalities, the data analysis unit sends a signal to stop the operation of the equipment to the control unit, and the control unit sends a stop operation instruction to the equipment. The data analysis method is as follows: A1. According to the preset parameters to be executed, the standard data corresponding to the parameters are called out, and the current pressure data in the data packet collected by the data acquisition unit is marked as Y _t , the highest pressure data is marked as Y _h , the lowest pressure data is marked as Y _l , the pressure holding time is marked as Y _b , and the pressure data conversion time is marked as Y _z ; A2. Then compare _Yt , _Yh , _Yl , _Yb and _Yz with the standard data _Bt , _Bh , _Bl , _Bb and _Bz . If Y _t , Y _h , Y _l , Y _b and Y _z are within the range of B _t , B _h , B _l , B _b and B _z , it is normal; If _Yt , _Yh , _Yl , _Yb and _Yz are not within the range of _Bt , _Bh , _Bl , _Bb and _Bz , the difference is calculated by the formulas _Ct = _{Bt - Yt, Ch = Bh - Yh, Cl = Bl - Yl , Cb = Bb - Yb and Cz = Bz - Yz ;} A3. Compare _Ct , _Ch , _Cl , _Cb and _Cz according to the abnormal value range to determine the degree of abnormality. The degree of abnormality includes mild abnormality, moderate abnormality and severe abnormality. Mild abnormality, moderate abnormality and severe abnormality will prompt a pop-up window on the touch screen (11) to remind maintenance and record the abnormal value. For severe abnormality, the control unit will issue a command to stop the equipment. 2. The control system of the air mattress capable of automatically implementing the prone position ventilation-assisted therapy according to claim 1, characterized in that: the data analysis unit generates and stores statistical line graphs of past data of C _t , _Ch , C _l , C _b and C _z respectively, and the statistical line graphs are retrieved and viewed through the touch screen (11). 3. The control system of the air mattress capable of automatically implementing the prone position ventilation-assisted therapy according to claim 1, characterized in that each individual chamber of the single-chamber air strip (25), the first double-chamber air strip (26), the second double-chamber air strip (27) and the three-chamber air strip (28) is connected to the air guide tube (12) via a three-way solenoid valve (15). 4. The control system of the air mattress capable of automatically implementing prone position ventilation-assisted therapy according to claim 1, characterized in that: the host (1) comprises a touch screen (11), a main control board (13), an air pump (14), a three-way solenoid valve (15) and a pressure sensor, wherein the touch screen (11), the air pump (14), the three-way solenoid valve (15) and the pressure sensor are respectively connected to the main control board (13), and the pressure sensor comprises a first pressure sensor (16) and a second pressure sensor (17), wherein the first pressure sensor (16) is connected to the first double-chamber air strip (26), and the second pressure sensor (17) is connected to the single-chamber air strip (25), the second double-chamber air strip (27) and the three-chamber air strip (28) through the air guide tube (12).