阅读说明：本技术 一种智能压力反馈控制的功能电刺激压疮防治系统 (Intelligent pressure feedback control functional electrical stimulation pressure sore prevention and control system ) 是由 齐莉萍 徐硕 夏书峰 田志浩 李志鹏 潘泊凡 于 2020-12-11 设计创作，主要内容包括：本发明属于医用综合性智能设备技术领域,提供了一种智能压力反馈控制的功能电刺激压疮防治系统,包括移动智能终端、压疮防治仪、压疮防治仪插头、线缆、电极片和柔性薄膜压力传感器。本发明的功能电刺激压疮防治系统可根据臀部所处压力大小和持续时间长短,智能选择刺激模式,避免因采用固定强度和频率的脉冲刺激而引起的肌肉疲劳、皮肤红肿等问题；使用者也可自主选择刺激模式,进行个性化定制。本发明的功能电刺激压疮防治系统将功能电刺激与柔性薄膜压力传感器结合起来,利用体表压力作为反馈信号,通过算法选择刺激参数不同的刺激模式。(The invention belongs to the technical field of medical comprehensive intelligent equipment, and provides an intelligent pressure feedback control functional electrical stimulation pressure sore prevention and treatment system. The functional electrical stimulation pressure sore prevention and treatment system can intelligently select a stimulation mode according to the pressure and duration of the hip, and avoid the problems of muscle fatigue, skin red swelling and the like caused by pulse stimulation with fixed strength and frequency; the user can also select the stimulation mode independently to carry out personalized customization. The functional electrical stimulation pressure sore prevention and treatment system combines functional electrical stimulation and the flexible film pressure sensor, utilizes the body surface pressure as a feedback signal, and selects stimulation modes with different stimulation parameters through an algorithm.)

1. The intelligent pressure feedback control functional electrical stimulation pressure sore prevention and treatment system is characterized by comprising a mobile intelligent terminal, a pressure sore prevention and treatment instrument plug, a cable, an electrode plate and a flexible film pressure sensor;

the mobile intelligent terminal is a mobile phone, changes parameters of a pulse output signal of the pressure sore prevention and treatment instrument through a mobile phone APP, including amplitude, stimulation time and duty ratio, and displays the body surface pressure of a human body;

the pressure sore prevention and treatment instrument is electrically connected with the electrode plate and the flexible film pressure sensor respectively through a pressure sore prevention and treatment instrument plug and a cable;

the pressure sore prevention and treatment instrument comprises a power supply module, a system on a chip, a pulse driving module and a pressure feedback module; the power supply module is used for filtering or converting a power supply, and then electrically connecting the power supply with the system on chip, the pulse driving module and the pressure feedback module respectively, and providing the power supply in a direct current mode; the system-on-chip is a system-on-chip integrating a central processing unit, a timer, wireless communication and an analog-to-digital converter, sends a control signal and a stimulation signal to the pulse driving module, receives a feedback signal from the pressure feedback module and interacts with the mobile phone in a wireless communication mode; the pressure feedback module is used for measuring the pressure change of the body surface of a human body, converting pressure data of the flexible film pressure sensor into 0-4V voltage data, acquiring the 0-4V voltage data by using an analog-to-digital converter of the system on chip, sending the voltage data to the central processing unit for conversion processing, and converting the voltage data into 0-200N pressure data; the pulse driving module receives a 3.3V stimulation signal and a control signal from the system on chip to generate a pulse output signal with variable amplitude, variable duty ratio and variable stimulation time.

Technical Field

The invention belongs to the technical field of medical comprehensive intelligent equipment, and particularly relates to a functional electrical stimulation pressure sore prevention and treatment system based on intelligent pressure feedback control.

Background

Pressure sores (also called bedsores and pressure ulcers) are caused by the fact that local skin and subcutaneous tissues are pressed for a long time to cause capillary vessel obstruction, so that oxygen and nutrition in the tissues are deprived, and tissue ulceration and necrosis caused by continuous ischemia, hypoxia, edema and inflammation occur, and the pressure sores often occur in the bone processes without muscle coating or with thin muscle layers and lack of fat tissue protection and frequent pressing.

The prevention and treatment of pressure sores are always difficult in clinical nursing work, which not only bring pain to patients, prolong the recovery time of the patients and increase the treatment cost of the patients, but also possibly induce other fatal complications to cause death. Pressure sore prevention is currently accomplished primarily through regular and burdensome clinical care work changing and properly positioning the patient and using different kinds of pressure reduction equipment. The main preventive measures at present are: 1) the long-term pressure of local tissues is avoided, the body position is changed periodically, and the pressure of the protruded part of the skeleton is reduced; 2) properly positioning the patient and using appropriate pressure relief equipment; 3) keeping the microenvironment of the skin dry and clean.

Under the background of the current accurate medical age, due to a plurality of defects of the existing medical auxiliary equipment, the automation and intelligence degrees of monitoring, preventing and treating pressure sores are low, and the pressure sores still depend on manual medical nursing work to a great extent. Therefore, a pressure sore control system is needed.

Disclosure of Invention

The invention aims to solve the technical problem that the parameters of the traditional functional electrical stimulation cannot be adaptively adjusted along with the using environment and body posture of a user, and provides an intelligent pressure feedback control functional electrical stimulation pressure sore prevention and treatment system. The user can control the electrical stimulation parameter (stimulation mode) of the pressure sore prevention and treatment instrument through cell-phone APP, monitors the change of human body surface pressure.

The technical scheme adopted by the invention is as follows:

the utility model provides a sore prevention and cure system is pressed to intelligence pressure feedback control's function electro photoluminescence, includes mobile intelligent terminal, presses sore prevention and cure appearance plug, cable, electrode slice and flexible film pressure sensor etc..

The mobile intelligent terminal is a mobile phone, changes parameters (including amplitude, stimulation time and duty ratio) of a pulse output signal of the pressure sore prevention and treatment instrument through a mobile phone APP, and has the functions of displaying body surface pressure of a human body and the like;

the pressure sore prevention and treatment instrument is electrically connected with the electrode plate and the flexible film pressure sensor through a pressure sore prevention and treatment instrument plug through a cable.

The pressure sore prevention and treatment instrument comprises a power supply module, a system on a chip, a pulse driving module and a pressure feedback module. The power supply module is used for filtering or converting a power supply, and then electrically connecting the power supply with the system on chip, the pulse driving module and the pressure feedback module respectively, and providing the power supply in a direct current form (+3V, + 5V); the system on chip is a system-on-chip integrated with a Central Processing Unit (CPU), a Timer, Wireless communication (Wireless communication), an analog-to-digital converter (ADC) and the like, sends control signals and stimulation signals to the pulse driving module, receives feedback signals from the pressure feedback module and interacts with the mobile phone in a Wireless communication mode; the pressure feedback module is used for measuring the pressure change of the body surface of a human body, converting pressure data of the flexible film pressure sensor into 0-4V voltage data, acquiring the 0-4V voltage data by using an analog-to-digital converter of the system on chip, sending the voltage data to the central processing unit for conversion processing, and converting the voltage data into 0-200N pressure data. The pulse driving module receives a 3.3V stimulation signal and a control signal from the system on chip to generate pulse output signals with variable amplitude (0-24V), variable duty ratio (20%, 33%, 50%) and variable stimulation time (10s, 15 s).

The invention has the beneficial effects that:

(1) the invention can intelligently select the stimulation mode according to the pressure and the duration of the hip, thereby avoiding the problems of muscle fatigue, skin red swelling and the like caused by pulse stimulation with fixed intensity and frequency; the user can also select the stimulation mode independently to carry out personalized customization.

(2) The invention combines Functional Electrical Stimulation (FES) and a flexible film pressure sensor, utilizes body surface pressure as a feedback signal, and selects different stimulation modes of stimulation parameters (stimulation waveform, stimulation duration, stimulation duty ratio and the like) through an algorithm.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of a functional electrical stimulation pressure sore prevention and treatment system with intelligent pressure feedback control.

Fig. 2 is a schematic structural view of the pressure sore prevention and treatment instrument.

In the figure: 1, moving an intelligent terminal; 2, a pressure sore prevention and treatment instrument; 3, pressing sore prevention and treatment instrument plug; 4, a cable; 5, electrode plates; 501, positive electrode of an electrode plate; 502 electrode plate cathode; 6 flexible film pressure sensor; 701 pulse signals; 702 a control signal; 703 feeding back a signal; 704 communication signals; 705 a pulse output signal; 10, mobile phone APP; and; 20 a power supply module; 21 a system on a chip; 22 a pulse driving module; the 220 pulse starting circuit comprises a boosting circuit; a 221 channel selection circuit; 23 pressure feedback module.

Detailed Description

The invention is further described with reference to the following figures and examples:

example (b): referring to the attached drawings 1 and 2, the technical problem to be solved by the invention is to control a functional electric stimulation system by using a pressure signal as a feedback signal so as to prevent pressure sores at the sacrum part of the hip. As shown in fig. 1: the utility model provides a sore prevention and cure system is pressed to intelligence pressure feedback control's function electro photoluminescence, includes mobile intelligent terminal 1, presses sore prevention and cure appearance 2, presses sore prevention and cure appearance plug 3, cable 4, electrode slice 5 and flexible film pressure sensor 6. The mobile intelligent terminal 1 is a mobile phone, and changes parameters (including amplitude, stimulation time and duty ratio) of a pulse output signal 705 of the pressure sore prevention and treatment instrument through a mobile phone APP 10.

As shown in fig. 2: the pressure sore prevention and treatment instrument comprises a power module 20, a system-on-chip 21, a pulse driving module 22 and a pressure feedback module 23. The power module converts 3 AA dry batteries into a direct current form (+3.3V and +5V) through the power module, and is respectively electrically connected with the on-chip system 21(+3.3V), the pulse driving module 22(+3.3V and +5V) and the pressure feedback module 23(+3.3V) to provide a power supply; the system on chip 21 may use CC2540(BLE4.0) (or CC2530(ZigBee), CC3200(WIFI), etc.) with a wireless communication module of the TI company to send a control signal 702 and a stimulation signal to the pulse driving module 22, receive the feedback signal 703 of the pressure feedback module 23, and interact with the mobile phone in a wireless communication manner; the pressure feedback module 23 provides 2mA constant direct current to the flexible film pressure sensor 6, pressure data of the flexible film pressure sensor 6 is converted into 0-4V voltage data, an analog-to-digital converter of the system on chip is used for collecting 0-4V voltage data change, the 0-4V voltage data change is sent to the central processing unit for conversion processing, the 0-180N pressure data are converted, and the pressure-voltage-pressure data conversion is completed. The BOOST circuit of the pulse driving module 22 receives a 3.3V pulse signal 701 from the system on chip to BOOST the voltage to 100V, and the channel selection circuit of the pulse driving module 22 receives a 3.3V control signal 702 from the system on chip to generate a pulse output signal 705 by changing the switching frequency, duty ratio and on-time of the channel selection circuit. The pulse output signal 705 is 20Hz, duty cycle (20%, 33.3%, 50%), amplitude (with load amplitude range 0-24V), and stimulation time is variable (10s, 15 s). The stimulation pattern shown refers to pulsed output signals 705 of different parameters.

The flexible film pressure sensor 6 is used for feedback adjustment, and the pressure is different according to the current interface material (such as wood hard bed, spring mattress, cotton mattress, soft seat, wood seat, leather seat, and the like) of the user body and the current posture (such as standing, sitting, lying and half lying). Dividing different pressure threshold value ranges according to different use scenes, judging the pressure threshold value range of the pressure borne by the buttocks and the interface, controlling the pressure sore prevention and treatment instrument to select different stimulation modes, and releasing and outputting pulse signals through the electrode plates.

Taking the prevention and treatment of the hip pressure sores as an example, the distribution of hip pressures of the testee under different postures (sitting posture and lying posture) and different environments (hard materials and flexible sponge fabric materials) is measured, and different pressure thresholds are divided. According to different pressure thresholds, different stimulation modes are intelligently selected, and the corresponding relation between the stimulation modes and the use scenes of hip pressure sore prevention is shown in the following table.

When the system is used, the four electrode plates 5 are respectively stuck to the left gluteus maximus and the right gluteus maximus near the sacrum of a user, and the other surfaces of the electrode plates are attached with flexible film pressure sensors for collecting the pressure on the buttocks. The user can use cell-phone APP to independently select amazing mode, also can be by pressing sore prevention and cure appearance intelligence selection amazing mode and see through the pressure variation of cell-phone APP monitoring self.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the content of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention at one time. All equivalent changes and modifications made according to the spirit of the invention are covered by the protection scope of the invention.