CN201664463U

CN201664463U - Hand-held negative pressure wound therapeutic apparatus of low power consumption

Info

Publication number: CN201664463U
Application number: CN2010201534179U
Authority: CN
Inventors: 武永胜; 李文杰; 赵明; 沈昱明
Original assignee: University of Shanghai for Science and Technology
Current assignee: University of Shanghai for Science and Technology
Priority date: 2010-04-08
Filing date: 2010-04-08
Publication date: 2010-12-08
Anticipated expiration: 2020-04-08

Abstract

The utility model relates to a hand-held negative pressure wound therapeutic apparatus of low power consumption. One end of a rubber tube of medical use is inserted in a wound dressing cavity, and the other end of a rubber tube of medical use is connected to a mini air pump. A button for setting parameter is used to control circuit, and an air pressure sensor which collects the air pressure in the suction pipe of the mini air pump inputs the signal to a MCU circuit for treatment. The MUC circuit outputs the control signal to an air pump, a buzzer-driven circuit and a solenoid valve driven circuit, and the output work state index is displayed on a LCD display. A regulated power supply circuit provides power desired for each circuit. The utility model is advantageous in that firstly user-friendly performance, convenient carrying and low noise are achieved; secondly a plurality of treatment modes with high intellectualization are provided; thirdly power supply of over six hours is achieved by using three common batteries of 1.5V and battery replacing is easy; fourthly the hand-held negative pressure wound therapeutic apparatus of low power consumption is suitable for small wound treatment.

Description

A kind of low-power consumption Wound-surface negative pressure therapeutic instrument of hand-held

Technical field

This utility model relates to a kind of medical device, particularly a kind of low-power consumption Wound-surface negative pressure therapeutic instrument of hand-held.

Background technology

Wound negative pressure treatment technology (negative pressure wound therapy, NPWT) be the novel method of a kind of accelerating wound of rising in recent years, be widely used in the treatment of a series of difficult healing of wound, comprised acute, chronic, infected wound.This technology not only strengthens the drainage of wound surface, and can significantly accelerate to infect the closure of lacuna, promotes wound healing, reduce antibiotic use significantly, patient's hospital stays is shortened in the generation of effectively protecting from infection, alleviate patient's misery, reduce medical personnel's workload.At present, the negative pressure therapeutic instrument that this technology of employing has been arranged on the Chinese market, for example: the Zn100 wound negative pressure therapeutic instrument that Di Mei Del Science Co., Ltd in Beijing produces though this product can be realized above-mentioned functions, costs an arm and a leg, volume is excessive, during especially outdoor use, be not easy to carry, and because air pump power is bigger, noise height during work has a strong impact on patient's emotion.

Summary of the invention

This utility model is to cost an arm and a leg at present wound negative pressure therapeutic instrument, the problem that inconvenience is carried has proposed a kind of low-power consumption Wound-surface negative pressure therapeutic instrument of hand-held, adopts the design of super low power consuming single chip processor processor and micro air pump, utilize LCD to show information such as negative pressure parameter and mode of operation, compare this type product on the market, have good and cheaply, use dexterous, easy to carry, noise is low, and multiple treatment pattern is provided simultaneously, intelligent degree height.

The technical solution of the utility model is: a kind of low-power consumption Wound-surface negative pressure therapeutic instrument of hand-held, comprise the wound dressing chamber, medical rubber hose, micro air pump, medical rubber hose one end is inserted in the wound dressing chamber, one end connects micro air pump, also comprise single chip circuit, voltage-stabilized power supply circuit, the button control circuit, air pump, buzzer drive circuit, driving circuit for electromagnetic valve, baroceptor, LCD display, the button control circuit that parameter is set is input to signal in the single chip circuit with the baroceptor of gathering micro air pump exhaust tube internal gas pressure to be handled, single chip circuit outputs a control signal to air pump, buzzer drive circuit and driving circuit for electromagnetic valve, the output services state index shows that to LCD display voltage-stabilized power supply circuit provides required power supply for each circuit.

Described single chip circuit is selected MSP430F149 model single-chip microcomputer for use, described air pump, buzzer drive circuit are selected the ULN2003A chip for use, single-chip microcomputer IO mouth output signal is amplified by the ULN2003 chip signal, the P1.0 of single-chip microcomputer inserts the first passage of ULN2003A, and the P1.1 of single-chip microcomputer inserts the second channel of ULN2003A.

Described baroceptor will be transferred to single-chip microcomputer P6.0AD conversion mouth through a 4.7K and the series connection of 2K resistance after the signal drops.

Described micro air pump adopts diaphragm type vacuum pump-GAST, and the baroceptor model is MPXV7025G, and electromagnetic valve model is KSV04E-3A DC3V.

The beneficial effects of the utility model are: the low-power consumption Wound-surface negative pressure therapeutic instrument of this utility model hand-held, has the dexterity of use, be convenient for carrying, noise is low, multiple treatment pattern is provided simultaneously, and intelligent degree height adopts 3 joints 1.5V battery powered commonly used, can power more than 6 hours continuously, and it is convenient to change battery.Be mainly used in the treatment of small area wound wound.

Description of drawings

Fig. 1 is the structured flowchart of this utility model hand-held low-power consumption Wound-surface negative pressure therapeutic instrument;

Fig. 2 is this utility model hand-held low-power consumption Wound-surface negative pressure therapeutic instrument MSP430 single chip circuit figure;

Fig. 3 is this utility model hand-held low-power consumption Wound-surface negative pressure therapeutic instrument voltage-stabilized power supply circuit figure;

Fig. 4 is this utility model hand-held low-power consumption Wound-surface negative pressure therapeutic instrument key control circuit figure;

Fig. 5 is this utility model hand-held low-power consumption Wound-surface negative pressure therapeutic instrument air pump, buzzer drive circuit figure;

Fig. 6 is this utility model hand-held low-power consumption Wound-surface negative pressure therapeutic instrument driving circuit for electromagnetic valve figure;

Fig. 7 is this utility model hand-held low-power consumption Wound-surface negative pressure therapeutic instrument baroceptor working circuit diagram.

The specific embodiment

Hand-held low-power consumption wound therapeutic instrument structured flowchart as shown in Figure 1, comprise the wound dressing chamber, medical rubber hose, micro air pump, single chip circuit 1, voltage-stabilized power supply circuit 5, button control circuit 6, air pump, buzzer drive circuit 7, driving circuit for electromagnetic valve 8, baroceptor 9, LCD display 10, medical rubber hose one end is inserted in the wound dressing chamber, one end connects micro air pump, the button control circuit 6 of parameter and the baroceptor 9 of collection micro air pump exhaust tube internal gas pressure are set signal is input to processing in the single chip circuit 1, single chip circuit 1 output is by driving circuit for electromagnetic valve 8 control electromagnetic valves, by drive circuit 7 control buzzer and micro air pumps, the output services state index shows that to LCD display 10 voltage-stabilized power supply circuit 5 provides required power supply for the each several part circuit.

Button control circuit 6 can be provided with the negative pressure parameter, and when air pump was started working, baroceptor 9 was constantly gathered the air pressure in the exhaust tube, and when reaching the pneumatic parameter of setting, air pump quits work.Under the effect of negative pressure, the medical sponge body can absorb congestion in the wound dressing chamber and Excreta.

MSP430 single chip circuit 1 comprises single-chip microcomputer, reset circuit 2, crystal oscillating circuit 3, electric weight testing circuit 4 as shown in Figure 2, in entire circuit, the power supply of two-way power supply is provided, single-chip microcomputer peripheral circuits and button control circuit all adopt the power supply of 3.3V power supply, and air pump and buzzer drive circuit adopt the 4.5V power supply.Reset circuit 2 when needs are reset negative pressure parameter and mode of operation, can be pressed down SR and restart; Crystal oscillating circuit 3 provides the driving signal of 8MHZ for single-chip microcomputer; Power sense circuit 4, when battery electric quantity is not enough, the most tangible is exactly that battery powered voltage reduces, but because the normal power supply voltage of battery is 4.5V, and the supply voltage of single-chip microcomputer mustn't surpass 3.3V, in order to gather battery voltage signal, use two placed in-line mode blood pressure lowerings of resistance here, the P6.1 interface that then the blood pressure lowering signal is sent to single-chip microcomputer is for the AD conversion; Fig. 3 is a power control circuit, the P4.5 interface links to each other with the two ends of series-connected cell, pass through the blood pressure lowering of AMS117-3.3 chip then, the voltage that produces 3.3V uses for single-chip microcomputer and peripheral circuit thereof, and the electric capacity before and after the chip can be eliminated interfering signal voltage is stabilized in a constant; Fig. 4 is an ON-OFF control circuit, and one has three gauge taps, is respectively S1 start/stop switch, S2 mode selection switch and S3 parameter setting switch, and S1, S2, S3 link to each other with P1.4, P1.5, the P1.6 of MSP430F149 single-chip microcomputer respectively; Fig. 5 is a drive circuit, because single-chip microcomputer IO mouth driving force deficiency, and the micro air pump driving voltage needs 4.5V, so utilize the ULN2003A chip to improve driving force, 4.5 the heavy current signal that the 3.3V weak current signal of single-chip microcomputer output can be amplified, as shown in Figure 5, the P1.0 of single-chip microcomputer inserts the first passage of ULN2003A, and P1.1 inserts the second channel of ULN2003A; Fig. 6 is a driving circuit for electromagnetic valve, and 3V during the running voltage of electromagnetic valve is so can directly drive with transistor circuit; Fig. 7 is the baroceptor circuit, and running voltage is 4.5V, is adopting the series connection of a 4.7K and 2K resistance, and the output signal pressure drop is transferred to P6.0 for the Chip Microcomputer A conversion then to 3V.

When using this instrument, at first pressing down the S1 button does not put for 3 seconds, negative pressure therapeutic instrument begins to start, and enter the programming mode before the work, this instrument has three kinds of mode of operations: under the A pattern, when the air pressure of wrapping intracavity reached the parameter of setting, air pump quit work, and air pump restarts when less than setting air pressure, stops when reaching setting air pressure once more and constantly circulation; Under the B pattern,, keep air pressure 5 minutes constant when the air pressure of wrapping intracavity when reaching the parameter of setting, then by the venting of control electromagnetic valve, after 30 seconds again circulation bleed; Under the C pattern, the air pump continuous operation, the peak suction negative pressure can reach 180mmHG, finishes to bleed when pressing down stop key, and this pattern should carefully be used.After pressing down S2 and configuring mode of operation, press down the S1 key, enter the setting of negative pressure parameter, initial set value is negative 50mmHG, and whenever pressing a S3 increases 15mmHG, turns back to negative 50mmHG when reaching maximum again, press down S1 after configuring and withdraw from programming mode, when pressing down S1 once more, micro air pump begins to bleed, and enters operate as normal.In the process of medical treatment, dynamically show air pressure and accumulation medical treatment time in the current exhaust tube, if can not reach the negative pressure value of setting within 1 minute, then can report to the police automatically, buzzer call, and show the gas leakage icon, at this moment need the medical worker to bind up a wound again.If in medical procedure, press down S1 and then suspend medical treatment, restart medical treatment when pressing down S1 once more.When finishing to use, as long as length is pressed the S1 key after 3 seconds, buzzer rings 2 times, and controller shuts down automatically.

Claims

1. the low-power consumption Wound-surface negative pressure therapeutic instrument of a hand-held, comprise the wound dressing chamber, medical rubber hose, micro air pump, medical rubber hose one end is inserted in the wound dressing chamber, one end connects micro air pump, it is characterized in that, also comprise single chip circuit, voltage-stabilized power supply circuit, the button control circuit, air pump, buzzer drive circuit, driving circuit for electromagnetic valve, baroceptor, LCD display, the button control circuit that parameter is set is input to signal in the single chip circuit with the baroceptor of gathering micro air pump exhaust tube internal gas pressure to be handled, single chip circuit outputs a control signal to air pump, buzzer drive circuit and driving circuit for electromagnetic valve, the output services state index shows that to LCD display voltage-stabilized power supply circuit provides required power supply for each circuit.

2. according to the low-power consumption Wound-surface negative pressure therapeutic instrument of the described hand-held of claim 1, it is characterized in that, described single chip circuit is selected MSP430F149 model single-chip microcomputer for use, described air pump, buzzer drive circuit are selected the ULN2003A chip for use, single-chip microcomputer IO mouth output signal is amplified by the ULN2003 chip signal, the P1.0 of single-chip microcomputer inserts the first passage of ULN2003A, and the P1.1 of single-chip microcomputer inserts the second channel of ULN2003A.

3. according to the low-power consumption Wound-surface negative pressure therapeutic instrument of the described hand-held of claim 1, it is characterized in that described baroceptor output signal is carried out the AD conversion through a 4.7K and 2K resistance series connection dividing potential drop with being transferred to single-chip microcomputer P6.0 after the signal drops.

4. according to the low-power consumption Wound-surface negative pressure therapeutic instrument of the described hand-held of claim 1, it is characterized in that described micro air pump adopts diaphragm type vacuum pump-GAST, the baroceptor model is MPXV7025G, and electromagnetic valve model is KSV04E-3A DC3V.