CN103203068A

CN103203068A - Negative-pressure wound nursing system with buffering unit

Info

Publication number: CN103203068A
Application number: CN2012100108799A
Authority: CN
Inventors: 姚南光; 苗罗华; 吴忠文; 简仁建; 陈士辅; 李丽玲
Original assignee: Apex Medical Corp
Current assignee: Wellell Inc
Priority date: 2012-01-13
Filing date: 2012-01-13
Publication date: 2013-07-17
Anticipated expiration: 2032-01-13
Also published as: CN103203068B

Abstract

The invention relates to a negative-pressure wound nursing system with a buffering unit. The negative-pressure wound nursing system is provided with a buffering unit which is arranged between an actuator and a wound dressing, wherein the buffering unit is provided with a physical condition which is approximate to a wound, so that self-stored negative pressure can be consumed and taken as negative compensation of the wound to resist micro pressure rise of the wound in the state of micro leakage; and moreover, the actuator acts on the wound indirectly, so that pain of the patient during pressure drop is reduced.

Description

The negative pressure wound care system of tool buffer cell

Technical field

The present invention is a kind of negative pressure wound care system of tool buffer cell, refers to a kind of for forming subnormal ambient with the care system of accelerating wound healing in wound.

Background technology

Negative pressure wound therapy (Negative Pressure Wound Therapy), it mainly utilizes and seals patch, soft sucker or biocompatibility porous material etc. and be attached on the wound, and the binding vacuum pump forms subnormal ambient in wound, to extract wound pus and infected material, and attract health tissues liquid keep moist treatment environment, and promote arround blood microcirculation and reach the effect of accelerating wound healing, in order to cooperate negative pressure wound therapy, developed in the prior art and the negative pressure wound care system.

See also shown in Figure 6, when the negative pressure wound care system of prior art operates, the liquid collector 92 of reference value detecting actuator 91 front ends of its pressure feedback control intrinsic pressure, maybe will detect a little 93 as far as possible close wounds 94, in order to measure near the force value in the wound 94, carry out feedback control after receiving signal by controller 95 again, determine whether to restart actuator 91 and keep negative pressure value in the wound 94, and then guarantee that negative pressure value can maintain in certain scope in the wound 94, yet, no matter the force value at liquid collector 92 places or detecting point 93 places still can with the true pressure value at wound 94 places difference to some extent, so the time point that starts actuator 91 error to some extent.

Moreover in the actual operating position, owing to little leakage phenomenon that the wound sepage is flowed out or the wrapping breakage produces is rather common, the change of negative pressure trace is frequent in the wound.If controller starts actuator again and again because of micro-negative pressure variation or still continues low-speed running when the voltage stabilizing, keep negative pressure in the wound, then will cause the loss of energy and improve running cost; But if improve to start threshold values, namely restart actuator after the pressure differential that accumulation is bigger and reply negative pressure value in the wound, then will cause short time wound internal pressure amplitude of variation excessive and cause wound pain.

Again, the negative pressure wound care system of prior art develops in addition and a kind of actuator is connected between liquid collector and the wound, and actuator will directly act on wound this moment, and then actuator is done the time spent, the pain when making sufferer feel blood pressure lowering easily.

Summary of the invention

Because every disappearance of aforesaid prior art, the present invention has designed a kind of negative pressure wound care system of tool buffer cell, it can keep the negative pressure value of wound under the state that actuator does not start, the pressure variety that when also the available buffer actuator starts wound is caused.

For reaching above-mentioned goal of the invention, the present invention has designed a kind of negative pressure wound care system of tool buffer cell, comprising a controller, a sensor, an actuator, a liquid collector, a wound dressing, and one in order to the negative pressure variation of reacting the wound and the buffer cell that negative pressure compensating is provided, controller forms with sensor and actuator respectively and is electrically connected, actuator is connected with liquid collector with buffer cell respectively, sensor and buffer cell join, and buffer cell is connected between wound dressing and the actuator.

The invention has the advantages that, buffer cell can provide negative pressure compensating by consuming negative pressure own, the wound opposing that then can make sufferer is flowed out because of sepage in therapeutic process or is wrapped up the negative pressure microlitre that little leakage causes, moreover, since actuator be directly for the buffer cell effect again indirect action in wound, so extract the wound inner fluid with the blood pressure lowering means that relax, can reduce the pain of sufferer when the wound blood pressure lowering.

Description of drawings

Fig. 1 is element sketch map of the present invention;

Fig. 2 is structural representation of the present invention;

Fig. 3 is the exploded view of buffer cell of the present invention;

Fig. 4 leaks for the present invention and little test leakage pressure testing power variation diagram;

Fig. 5 carries out manually opened valve for the present invention and starts the staggered back of actuator pressure variation;

Fig. 6 is the prior art constructions sketch map.

The specific embodiment

Below cooperate graphic and of the present invention preferred embodiment, further setting forth the present invention is to reach the technological means that predetermined goal of the invention is taked.

See also Figure 1 and Figure 2, the present invention includes a controller 10, a sensor 20, an actuator 30, a liquid collector 40, a buffer cell 50, reaches a wound dressing 60.

Aforesaid controller 10 forms with sensor 20 and actuator 30 respectively and is electrically connected, after the signal of sensor 20 transfers to controller 10, determine whether to start actuator 30 by controller 10, actuator 10 is connected with liquid collector 40 with buffer cell 50 respectively, in preferred embodiment, actuator 10 is connected between buffer cell 50 and the liquid collector 40, and sensor 20 joins with buffer cell 50, and buffer cell 50 is connected between wound dressing 60 and the actuator 30.

Buffer cell 50 has and the similar physical condition of true wound, and buffer cell 50 is connected with wound dressing 60, so can be similar to the intrinsic pressure of true wound, therefore sensor 20 can be used as the reference value of system's feedback control by the pressure of detecting buffer cell 50, buffer cell 50 is by the negative pressure of consumption itself, to provide wound dressing 60 place's negative pressure compensatings immediately.

See also shown in Figure 3, in preferred embodiment, buffer cell 50 includes a water accepting layer 51, one air-permeable layer 52 and a lamina reticularis 53, wherein air-permeable layer 52 is connected with sensor 20, water accepting layer 51 is high molecular foam material (PVA for example, Polyvinyl Alcohol polyvinyl alcohol) made, it has high suction ratio and high volumetric expansion variation characteristic, its water absorption character is reversible, when being in negative pressure state in the buffer cell 50, its volume is compressed and present draining characteristics, and when negative pressure in the buffer cell 50 disappears, its volume begins to expand and presents powerful water absorbing capacity, so that remaining sepage in the pipeline is sucked, and present the water storage characteristic, air-permeable layer 52 is permeable watertight material (PVDF for example, Polyvinylidene fluoride gathers difluoroethylene), avoid sepage to flow in the sensor 20 by its material characteristic, simultaneously sensor 20 is detected negative pressure variation in the buffer cell 50 by air-permeable layer 52, lamina reticularis 53 can be by polypropylene (PP, Polypropylene) made, its inside comprises the space, when buffer cell 50 is in negative pressure state, the space simulation wound tissue of lamina reticularis 53, provide sepage suitable flow channel, with the buffer cell 50 avalanche lockings that prevent to put in order.

See also shown in Figure 2, when use is of the present invention, wound dressing 60 is in order to be covered in the wound of sufferer, start actuator 30 and form negative pressure state to make the wound by buffer cell 50, the negative pressure value at sensor 20 detecting buffer cells 50 places also feeds back to controller 10, controller 10 is looked the negative pressure value that detects and is determined whether starting actuator 30 blood pressure lowering again, and the waste liquid of wound enters liquid collector 40 and is collected by wound dressing 60, buffer cell 50, actuator 30 in regular turn.

See also shown in Figure 4, the present invention utilizes two kinds of states making pipeline leakage and little leakage to test the effect that buffer cell produces, start actuator under the original state so that buffer cell pressure for-210mmHg and then make wound pressure be-150mmHg, after process in all do not restart actuator; The situation of making pipeline leakage when time t1 is kept the several seconds, this moment, wound pressure significantly rose to approaching-90mmHg, after pipeline recovers normal the connection, the force value of buffer cell slowly rises to compensate the negative pressure value of wound, make the force value of wound drop to-120mmHg, because the situation voltage rise of leaking is more, leaks preceding initial value so buffer cell can't allow the force value of wound fall back, but can partly fall back leaking boosting of causing; The situation of making the little leakage of pipeline when time t2 and t3 is kept the several seconds, this moment, wound pressure rose to approaching-90mmHg a little, after pipeline recovers normally, the force value of buffer cell slowly rises to compensate the negative pressure value of wound, make the force value of wound drop to-120mmHg, because the situation voltage rise of little leakage is less, so buffer cell can effectively be resisted the voltage rise that little leakage causes, rapid negative pressure with wound is restored the negative pressure value before extremely little leakage.

Therefore, by above-mentioned experimental data, can know the negative pressure compensating the when setting of learning buffer cell can change as wound pressure immediately, thus can be under the prerequisite that does not start actuator, and the sepage that utilizes buffer cell to resist wound is flowed out or is wrapped up the negative pressure microlitre phenomenon that little leakage causes.

See also shown in Figure 5ly, the present invention utilizes manual actuator and valve to make active negative pressure starting state, start actuator under the original state so that buffer cell pressure for-180mmHg and then make wound pressure be-80mmHg; When time t4, t6, the of short duration time of manually opened valve makes the buffer cell force value rise rapidly, can obviously observe out the ascensional range of wound pressure value this moment and be not so good as buffer cell big, the force value of buffer cell rises to 0mmHg rapidly by approaching-100mmHg in the identical time, the wound pressure value is only slowly risen to-30mmHg by approaching-70mmHg, and when time t8, even if the time of Open valve doubles, the wound pressure value is still kept the trend of slow rising; Behind valve-off, when time t5, t7, t9, start actuator with blood pressure lowering again, also can obviously observe out the fall of wound pressure value this moment and be not so good as buffer cell big, the force value of buffer cell is down to-210mmHg by 0mmHg in the identical time, but the wound pressure value only by approach-30mmHg is down to-60mmHg about and keep stable.

Therefore, can know by above-mentioned experimental data and to learn, because the buck that actuator carries out action is directly to the buffer cell effect, again by the indirect balance wound pressure of buffer cell, so buffer cell can effectively cushion buck to the impact of wound, carry out buck with the hands degree that relaxes, and then reduce the pain of sufferer when the wound blood pressure lowering.

The above only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in the scope that does not break away from technical solution of the present invention, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, any simple modification that foundation technical spirit of the present invention is done above embodiment, equivalent variations and modification all still belong in the scope of technical solution of the present invention.

Claims

1. the negative pressure wound care system of a tool buffer cell, it is characterized in that, comprise a controller, a sensor, an actuator, a liquid collector, a wound dressing, reach one in order to the negative pressure variation of reacting the wound and the buffer cell that negative pressure compensating is provided, described controller forms with described sensor and described actuator respectively and is electrically connected, described actuator is connected with described liquid collector with described buffer cell respectively, described sensor and described buffer cell join, and described buffer cell is connected between described wound dressing and the described actuator.

2. the negative pressure wound care system of tool buffer cell according to claim 1, it is characterized in that, described buffer cell includes a water accepting layer, an air-permeable layer and a lamina reticularis, the volume of described water accepting layer presents draining characteristics when compressed, present water absorption character during volumetric expansion, described air-permeable layer is connected with described sensor, and lamina reticularis inside comprises the space.

3. the negative pressure wound care system of tool buffer cell according to claim 2 is characterized in that, described water accepting layer is that high molecular foam material is made.

4. according to the negative pressure wound care system of claim 2 or 3 described tool buffer cells, it is characterized in that described lamina reticularis is that polypropylene is made.

5. according to the negative pressure wound care system of claim 2 or 3 described tool buffer cells, it is characterized in that described air-permeable layer is made for poly-difluoroethylene.

6. the negative pressure wound care system of tool buffer cell according to claim 4 is characterized in that, described air-permeable layer is made for poly-difluoroethylene.

7. according to the negative pressure wound care system of each described tool buffer cell in the claim 1 to 3, it is characterized in that described actuator is connected between described buffer cell and the described liquid collector.

8. the negative pressure wound care system of tool buffer cell according to claim 4 is characterized in that, described actuator is connected between described buffer cell and the described liquid collector.

9. the negative pressure wound care system of tool buffer cell according to claim 5 is characterized in that, described actuator is connected between described buffer cell and the described liquid collector.

10. the negative pressure wound care system of tool buffer cell according to claim 6 is characterized in that, described actuator is connected between described buffer cell and the described liquid collector.