KR101685509B1 - Method for checking drain tube and recalculation volume of wound - Google Patents

Abstract

The present invention relates to an apparatus and a method for treating a wound, comprising: a foam dressing disposed at a wound site; A film dressing adhered to the skin adjacent to the wound area to form a closed space at the wound area; A negative pressure generator for supplying negative pressure to the closed space; A drain tube for discharging the exudate absorbed by the foam dressing by the negative pressure supply of the negative pressure generating part; A suction head for discharging the exudate absorbed in the foam dressing to the drain tube; And an open / close valve installed to penetrate through the closed space and being opened or closed in accordance with an input signal to open or close the closed space and the outer space, and the wound treatment method includes closing and closing the open / And it is also possible to easily calculate the volume of the wound site to be treated, thereby improving the efficiency of wound healing.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method for checking the clogging of a drain tube and a volume recalculation volume of a wound,

The present invention relates to a method of confirming clogging of a drain tube and a method of re-calculating a volume of a wound site, and more particularly, to a method of confirming clogging of a drain tube of a wound treatment apparatus for promoting treatment of a wound using sound pressure, To a method of delivering the volume of a wound site using a device.

Recently, as one of various methods for promoting the treatment of a wound area, a treatment method using a negative pressure is performed, and a treatment method using such a negative pressure will be briefly described as follows.

First, the therapist places the foam dressing on the wound site, and in the state where the foam dressing is placed, the film dressing is attached to the adjacent skin area to seal the wound area.

Then, one end of the drain tube is communicated with a sealed space formed between the film dressing and the wound site in a state in which the wound site is sealed.

Then, the negative pressure generating unit communicated with the other end of the drain tube is driven to supply the negative pressure within the closed space. Thus, the exudate discharged from the wound is absorbed by the foam dressing, and the exudate absorbed by the foam dressing is discharged through the drain tube to the outside of the closed space.

Thus, as the exudates are removed from the wound site, the injured area promotes the granulation tissue formation and promotes wound healing.

However, as the wound site forms a closed space by the foam dressing and the film dressing, there is a risk that the wound is worsened by the wound infection bacteria due to the closed characteristics, and accordingly, a solution is required.

Korean Patent Publication No. 10-2011-0062962

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned needs, and it is an object of the present invention to provide a method and a device for preventing wounds from being worsened by infectious bacteria, Treatment apparatus and method.

Another problem to be solved by the present invention is to provide a wound treatment apparatus and method capable of controlling the sound pressure by allowing external air to flow into the closed space when the sound pressure on the wound region largely acts.

Another object of the present invention is to provide an apparatus and a method for treating a wound that can more easily grasp the clogging of a drain tube that absorbs exudates at a wound site by sound pressure and flows out of the closed space have.

It is another object of the present invention to provide a method and apparatus for measuring the volume of a wound in a wound healing process more easily, And to provide a wound treatment apparatus and a method for allowing a wound to be treated.

The problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a wound treatment apparatus comprising: a foam dressing disposed at a wound site; A film dressing adhered to the skin adjacent to the wound area to form a closed space at the wound area; A negative pressure generator for supplying negative pressure to the closed space; A drain tube for discharging the exudate absorbed by the foam dressing by the negative pressure supply of the negative pressure generating part; A suction head for discharging the exudate absorbed in the foam dressing to the drain tube; And an open / close valve that is installed through the closed space and opens and closes the closed space and the outside space according to an input signal.

In this case, the negative pressure generating unit may be provided with a control unit for controlling the generation of the negative pressure, and the control unit may transmit the input signal to the on / off valve to control the opening / closing amount.

In addition, the sound pressure generating unit may be provided with a sensing sensor for sensing the outlet pressure of the exudates flowing out of the closed space.

In addition, the on-off valve may be provided with a bidirectional on-off valve for discharging the air inside the closed space to the outside or for introducing outside air in the outside space into the closed space.

The open / close valve may be provided with a filter for blocking inflow of various harmful bacteria when the outside air flows into the closed space.

Meanwhile, a method for treating a wound according to an embodiment of the present invention is a method for measuring a drain line clogging of a wound wound effluent using the wound treatment apparatus, the method comprising: sealing the wound region with the foam dressing and the film dressing step; Supplying negative pressure to the closed space to discharge the exudates from the wound site to the outside and opening the open / close valve; Measuring a pressure of the drain line; And a step of checking or repairing or replacing the drain line when the pressure of the drain line is measured to be equal to or higher than a set pressure.

According to another aspect of the present invention, there is provided a wound treatment method for calculating a wound volume during treatment of a wound area using the wound treatment apparatus, the wound dressing including a wound dressing, ; Calculating a volume of the wound site; Supplying negative pressure to the closed space to allow the exudate from the wound to flow out; Stopping the supply of sound pressure to the closed space after the setting period has elapsed, and opening the open / close valve to restore the closed space; And recalculating the wound volume in the restored closed space.

Other specific details of the invention are included in the detailed description and drawings.

According to the apparatus and method for treating a wound according to the embodiment of the present invention, the closed space is ventilated by the outside air as necessary, thereby preventing the wounds from being worsened by an infectious disease or the like.

In addition, according to the apparatus and method for treating a wound according to the embodiment of the present invention, external air can be introduced into a closed space when a negative pressure on a wound is largely applied, so that the effect of adjusting the sound pressure can be provided.

In addition, according to the apparatus and method for treating a wound according to the embodiment of the present invention, it is possible to more easily grasp the clogging of the drain tube that absorbs the exudate at the wound site by sound pressure and flows out of the closed space .

In addition, according to the apparatus and method for treating a wound according to an embodiment of the present invention, it is possible to more easily measure the volume of a wound site during a treatment of a wound site, So that the effect of adjusting the amount of the drug solution can be provided.

The effects according to the present invention are not limited by the contents exemplified above, and more various effects are included in the specification.

FIGS. 1 to 6 are views schematically showing the structure and operation relationship of a wound treatment apparatus according to an embodiment of the present invention. FIG.
FIG. 7 is a flowchart sequentially showing a method for checking clogging of a drain tube of a wound treatment apparatus according to an embodiment of the present invention. FIG.
FIG. 8 is a flowchart sequentially illustrating a process of calculating a volume of a wound area during treatment of a wound using a wound treatment apparatus according to an embodiment of the present invention. FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. &Quot; comprises " and / or "comprising" when used in this specification is taken to specify the presence or absence of one or more other components, steps, operations and / Or additions.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. Also, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 to FIG. 6 are schematic diagrams showing the structure and operation relationship of a wound treatment apparatus according to an embodiment of the present invention.

The wound treatment apparatus according to the embodiment of the present invention includes a sound pressure output unit 100, a sound pressure transmitting unit 200, a sound pressure generating unit 300, a canister 400 and an on-off valve 500 can do.

The sound pressure output unit 100 can be disposed at the wound site W to seal the wound site W and thus can take charge of protecting the wound site W from various external harmful bacteria.

For reference, in an embodiment of the present invention, for convenience of explanation, the wound is an open wound having a recessed portion, but the present invention is not limited thereto and may be various types of wounds.

The sound pressure output unit 100 may include a foam dressing 110 disposed at the open wound site W and a film dressing 120 sealing the wound site W. [

Here, the foam dressing 110 is disposed in a state of being closely attached to the wound site W, and can absorb the exudates generated in the wound by the negative pressure.

The foam dressing 110 may be made of polyurethane, polyether, or the like in order to efficiently absorb exudates from the wound, but is not limited thereto, and may be made of any material as long as it can effectively absorb exudates have.

The foam dressing 110 may be in the form of a sponge having through holes for distributing sound pressure to the wound site W and transmitting exudates (pus or the like) absorbed from the wound site W. [

The foam dressing 110 can be varied in volume by the negative pressure supplied from the negative pressure generating part 300. For example, the foam dressing 110 may include a closed space S formed between the film dressing 120 and the wound area W, that is, a closed space S formed between the wound area W and the film dressing 120 When the negative pressure is supplied to the wound area W, the volume can be reduced by the negative pressure and the compression can be made to the surface of the wound area W. [ Further, when the supply of the negative pressure to the closed space S is stopped, the foam dressing 110 can be expanded to the original volume reduced by the restoring force due to the self-elasticity. Accordingly, the foam dressing 110 can be varied in volume by the negative pressure.

The film dressing 120 may adhere to the adjacent skin of the wound area W and seal the wound area W. [ At this time, the film dressing 120 can seal the wound area W in a state in which a part of the suction head 210, which will be described later, is exposed to the outside.

As described above, the film dressing 120 is attached to the adjacent skin of the wound site W, that is, the skin around the wound region W, so that the film dressing 120 is wound around the wound area W, (S) can be formed.

The film dressing 120 may be made of a stretchable material. Therefore, the film dressing 120 is not torn or broken by the pressure change in the closed space S.

That is, since the film dressing 120 is made of a material having elasticity, when the pressure in the closed space S is changed as the negative pressure is supplied into the closed space S, the film dressing 120 can be expanded or contracted, It will not tear or break.

The sound pressure transmitter 200 may transmit the sound pressure generated by the sound pressure generator 300 to the sound pressure output unit 100.

The sound pressure transmitting portion 200 may include a suction head 210 which is in tight contact with and communicates with one surface of the foam dressing 110 and a drain tube 220 which connects the suction head 210 and the negative pressure generating portion 300 Accordingly, the suction head 210 can function to discharge the exudate absorbed in the foam dressing 110 to the drain tube 220 by the negative pressure.

The suction head 210 may include a flange portion 211 contacting the one side of the foam dressing 110 and a connection tube portion 212 connected to the drain tube 220.

The flange portion 211 may be formed with a plurality of guide passages (not shown) communicating with the connecting tube portion 212. Accordingly, the exudate absorbed into the foam dressing 110 through the guide passage of the flange portion 211 can be guided to the connection tube portion 212.

The opening and closing valve 500 is installed through the film dressing 120 to open and close the closed space S and the external space. The opening and closing valve 500 is provided with a suction head 210 And the flange portion 211 of the flange portion 211. As shown in Fig.

The opening / closing valve 500 can manually open / close or adjust the amount of opening, and in some cases, the opening / closing amount or opening amount can be adjusted by an input signal of the control part 320 disposed in the sound pressure generating part 300 .

The opening / closing valve 500 can discharge the air in the closed space S to the outside space, and conversely, the air in the outside space can be introduced into the closed space. Therefore, it is preferable that a bi-directional open / close valve be provided.

Since the open / close valve 500 allows the air in the external space to flow into the closed space S where the wound site W is located, in order to prevent the foreign harmful bacteria from entering the closed space S, (Not shown) may be disposed. In order to block inflow of various micro-infectious bacteria such as bacteria, a nanofilter may be provided.

One end of the drain tube 220 is connected to the connection tube portion 212. Accordingly, the drain tube 220 can communicate with the closed space S through the suction head 210. [

The other end of the drain tube 220 may be connected to the canister 400. The drain tube 220 can communicate with the negative pressure generating unit 310 through the canister 400 because the canister 400 is connected to the output terminal of the negative pressure generating unit.

Since the drain tube 220 is connected to the closed space S and the negative pressure generating unit 310 as described above, the drain tube 220 is connected to the negative pressure generated in the negative pressure generating unit 310 to the closed space S Can supply.

The negative pressure generating unit 300 is provided with a negative pressure generating unit 310 therein and can supply the negative pressure generated by the negative pressure generating unit 310 to the negative pressure output unit 100 through the negative pressure transmitting unit 200 have.

The negative pressure generating unit 300 includes a negative pressure generating unit 310 for generating a negative pressure, a control unit 320 and a drain tube 220 for controlling the negative pressure generating unit 310 and an output terminal 311 of the canister 400 And a pressure sensor 330 capable of measuring the pressure.

The pressure sensor 330 measures the pressure when the exudate in the closed space S flows out through the drain line of the drain tube 220 and the output terminal 311 of the canister 400 or the like to block the drain line And the operating relationship therebetween will be described later in detail.

Although not shown separately, a power supply cable for supplying power may be provided. Or may be configured to secure the driving power of the negative pressure generator 300 in a wired / wireless charging mode other than the power supply mode through the power cable.

In addition, a hydrophobic filter may be provided between the canister 400 and the output end 340 of the sound pressure generating unit 310. The hydrophobic filter can prevent liquid such as exudates discharged from the closed space S from flowing into the negative pressure generating unit 310.

Also, a power button for on / off controlling the negative pressure generator 300 may be provided. When the power button is turned on, an operation signal for operating the sound pressure generating unit 310 is input to the control unit 320. On the contrary, when the power button is turned off, the control unit 320 receives the sound pressure generating unit 310) may be inputted to the control unit (not shown).

The sound pressure generating unit 310 generates sound pressure and supplies the generated sound pressure to the closed space S through the drain tube 220. The sound pressure generating unit 310 can be controlled by the control unit 320. [

The negative pressure formed by the negative pressure generating unit 310 is provided to the drain tube 220 of the negative pressure transmission unit 200 through the output terminal 340. The output terminal 340 is connected to the other side of the canister 400, The negative pressure provided by the canister 340 is provided to the drain tube 220 connected to one side of the canister 400 via the canister 400. [

A process of treating a wound using a wound treatment apparatus having the above-described structure will be described with reference to FIGS. 1 to 6. FIG.

First, as shown in FIG. 1, a foam dressing 110 is disposed on a wound area W of a patient, a film dressing 120 is disposed on a periphery of a wound area W, When the negative pressure generating unit 310 is operated while the closed space S is formed by the film dressing 120, negative pressure is applied to the closed space S as the negative pressure is supplied to the closed space S .

At this time, the on-off valve 500 is closed.

When negative pressure is applied to the closed space S in the state where the open / close valve 500 is closed, the air in the closed space S and the exudate absorbed in the foam dressing 110, as shown in FIG. 2, The film dressing 120 is contracted and the closed space S is contracted as it flows out through the connection tube portion 212 of the suction head 210 and the drain tube 220.

3, the air existing between the through holes between the foam dressings 110 and the exudate absorbed in the foam dressing 110 are sucked into the suction head (not shown) The foam dressing 110 is contracted as the foam is discharged through the connection tube portion 212 of the cap 210 and the drain tube 220 so that the closed space S is further reduced.

Therefore, the exudate generated in the wound area W and absorbed into the foam dressing 110 flows out of the closed space S through the connection tube part 212 of the suction head 210 and the drain tube 220, The effluent exudate can be collected by the canister 400.

However, when the sound pressure is increased during the treatment of the wound area W by the generation of the sound pressure, the pain may be felt depending on the patient. In this case, by allowing the therapist to manually open the on-off valve 500 or to open the on-off valve 500 with the input signal of the control unit 320, the outside air is supplied to the closed space S, S can be reduced.

In addition, when the wound area W is treated for a long time by the generation of sound pressure, the air in the closed space S may be contaminated by exudates such as pus. In this case, the supply of sound pressure to the closed space S is stopped And the opening / closing valve 500 is opened, the inside of the closed space S can be ventilated.

That is, when the supply of sound pressure to the closed space S is stopped and the open / close valve 500 is opened, as shown in FIG. 4, the shrunk foam dressing 110 and the film dressing 120 are restored The inside air in the closed space S can be discharged to the outside, and the outside air can also flow into the inside of the closed space S.

Therefore, since the contaminated air in the closed space S can be ventilated, it is possible to prevent the wound area from being infected by exudates such as pus.

In this case, as the filter is disposed in the opening / closing valve 500, various kinds of harmful bacteria contained in the outside air flowing into the closed space S can be filtered.

As described above, after the air in the closed space S is ventilated, the open / close valve 500 may be closed again, and sound pressure may be supplied to the closed space S again as described above to continue the wound treatment.

Meanwhile, the wound treatment apparatus according to the embodiment of the present invention sucks the exudate in the closed space S through the drain tube 220 by the negative pressure. The exudate may include solidified pus or blood, The drain tube 220 may be clogged by the solidified exudate.

If the drain tube 220 is clogged as described above, the negative pressure is not properly supplied to the closed space S, so that the effluent in the closed space S can not flow out smoothly, do.

In this case, it is possible to check the clogging of the drain tube 220 by opening the on-off valve 500. The process will be described as follows.

FIG. 7 is a flowchart sequentially showing a method for checking clogging of a drain tube of a wound treatment apparatus according to an embodiment of the present invention. FIG.

First, as shown in FIG. 5 and FIG. 7, a negative pressure is supplied to the closed space S with the open / close valve 500 opened.

Therefore, the air in the closed space S flows out through the drain tube 220 by the negative pressure, and the outside air flows into the closed space S through the open / close valve 500 opened by the outflow air.

That is, the outside air flows into the closed space through the open / close valve 500 by the amount of the air flowing out from the closed space S to the drain tube 220 by the negative pressure so that the drain tube 220 and the drain tube The constant pressure can be always measured by the pressure sensor 330 at the output terminal 311 of the canister 400 communicating with the pressure sensor 330. [

In this case, since the clogging of the drain tube 220 does not occur when the pressure measured by the pressure sensor 330 is constant, it is determined to be normal and the open / close valve 500 is closed, And the wound is treated as described above.

6, when the drain tube 220 is clogged by exudates solidified in the drain tube 220, when negative pressure is supplied to the closed space S with the open / close valve 500 opened, The outside air flowing into the closed space S through the opening / closing valve 500 can not flow out to the drain tube 220, so that the pressure of the drain line measured by the pressure sensor 330 becomes high.

When the pressure measured by the pressure sensor 330 suddenly increases, it is determined that the drain tube 220 is clogged and the drain tube 220 is inspected for repair or replacement. After that, You can continue to treat the wound as well.

On the other hand, in the case of treating a wound of a patient using the wound treatment apparatus according to the embodiment of the present invention, it is necessary to calculate the volume of the wound site prior to wound treatment.

The wound treatment apparatus according to the embodiment of the present invention includes a solution supply unit (not shown) for supplying a medicament or a wash solution to a wound site in accordance with the volume of an open wound site Not shown) may be additionally provided.

For example, if the volume of the open wound site W is large, the dosing agent or the washing liquid must be supplied according to the size thereof. If the volume of the open wound site W is small, Should be.

Therefore, the volume of the wound treatment is calculated before the wounds of the patient are treated using the wound treatment apparatus according to the embodiment of the present invention.

However, if the wound is treated for a predetermined period of time while calculating the volume of the first wound area (W) and supplying the medicament or the washing solution in accordance with the calculated volume, the wound area (W) The volume of the wound site W may change.

That is, as the wound area W is treated little by little, the volume gradually decreases.

As described above, when the volume of the wound site W is reduced, the amount of the medicament or the washing liquid to be supplied to the wound site W must be regulated. In the closed space S, Similarly, since the film dressing 120 and the foam dressing 110 are kept in a compressed state continuously, it is difficult to calculate to what extent the wound has not been wound to change the volume during the wound healing process.

Therefore, in order to recalculate the volume of the treated wound to some degree in the past, the supply of sound pressure to the closed space is stopped, the film dressing and the foam dressing are removed from the wound site, And then the volume of the wound area was released.

However, in the case of the wound treatment apparatus according to the embodiment of the present invention, since the opening and closing valve 500 for opening and closing the closed space S is included, the new film dressing and the foam dressing can more easily treat The amount of the medicament and the amount of the washing liquid supplied to the wound site W can be regulated.

FIG. 8 is a flowchart sequentially illustrating a process of calculating a volume of a wound area during treatment of a wound using a wound treatment apparatus according to an embodiment of the present invention. FIG.

As shown in FIGS. 1 to 6 and 8, by supplying a negative pressure to the closed space S of the wound site W to treat the wound area, the closed space S to be reduced is measured and the volume of the wound area .

The amount of the medicament or the washing liquid supplied to the wound site W is adjusted according to the volume of the wound region W thus calculated.

After the treatment process is performed for the set period, the supply of the negative pressure to the closed space S is stopped and the open / close valve 500 is opened to restore the closed space S to the original state.

That is, the negative pressure supplied to the closed space S is stopped, and when the open / close valve 500 is opened, the film dressing 120 and the foam dressing 110 are elastically restored as the outside air flows into the closed space S By expanding to the circular state, the closed space S can be restored to the original state.

After the closed space S is restored to the original state, the open / close valve 500 is closed again, and then the negative pressure is supplied to the closed space S of the wound site W, In the course of treatment, the volume of the wound area to which treatment has been applied is re-calculated by measuring the reduced confined space.

Therefore, the dose of the medicament or the washing liquid supplied to the wound site W may be adjusted again according to the volume of the re-calculated wound area.

For reference, in the embodiment of the present invention, the volume calculation of the wound site W is performed by calculating the volume of the wound site by measuring the closed space which is reduced as the negative pressure is supplied to the closed space S However, this is only one example, and it is needless to say that the volume of a wound site can be calculated by any method known in the art.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: Sound pressure output part 110: Foam dressing
120: Film dressing 200: Sound pressure transmitting part
210: suction head 212: connector
300: Sound pressure generator 320:
330: pressure sensor 400: canister
500: Gappe valve

Claims (7)

A sound pressure generator for generating a sound pressure to be supplied to the closed space and a sound pressure generator for delivering the sound pressure supplied from the sound pressure generator to the closed space and generating an exudate generated in the closed space, A drain tube for discharging the drainage tube from the sealed space, and an open / close valve for opening or closing the sealed space and the external space through the film dressing,
Closing the on-off valve to connect the closed space and the outer space,
A negative pressure is supplied to the closed space in a state where the open / close valve is opened,
Measuring the pressure of the drain tube,
And determining that the drain tube is normal if the measured pressure value is maintained constant. The method according to claim 1,
And determining that the drain tube is clogged when the measured pressure value becomes high. The method according to claim 1,
Wherein the point of measurement of the pressure of the drain tube is a point closer to the negative pressure generating part than the closed space. The method according to claim 1,
The wound treatment apparatus further comprises a foam dressing disposed between the wound site and the film dressing in the closed space, and a suction head disposed between the foam dressing and the film dressing,
Wherein the suction head includes a flange portion whose bottom surface is in contact with one surface of the foam dressing,
Wherein the opening / closing valve is disposed so as to extend upward from the flange portion and pass through the film dressing,
Wherein the outer space of the outer space flows into the upper end of the open / close valve when the open / close valve is opened, and is discharged to the bottom surface of the flange portion through the open / close valve and the flange portion. A sound pressure generator for generating a sound pressure to be supplied to the closed space and a sound pressure generator for delivering the sound pressure supplied from the sound pressure generator to the closed space and generating an exudate generated in the closed space, And an opening / closing valve that opens or closes the closed space and the outer space through the film dressing. The method of claim 1,
Supplying a negative pressure to the closed space, calculating a volume of the wound site based on a flow rate of the fluid discharged from the closed space,
A negative pressure is supplied to the closed space for a predetermined time to discharge the exudate from the closed space,
The supply of sound pressure to the sealed space is stopped,
The open / close valve is opened to connect the closed space and the outer space, so that outside air flows into the closed space,
After the closed space is restored by the outside air flowing into the closed space,
Closing the on-off valve to shut off the connection between the closed space and the outer space,
The supply of sound pressure to the sealed space is resumed,
And discharging the volume of the wound site based on the flow rate of the fluid discharged from the closed space by the negative pressure supplied to the sealed space. 6. The method of claim 5,
The wound treatment apparatus further comprises a foam dressing disposed between the wound site and the film dressing in the closed space, and a suction head disposed between the foam dressing and the film dressing,
Wherein the suction head includes a flange portion whose bottom surface is in contact with one surface of the foam dressing,
Wherein the opening / closing valve is disposed so as to extend upward from the flange portion and pass through the film dressing,
The outside air flows into the upper end of the on-off valve and flows through the opening / closing valve and the flange portion to the bottom surface of the flange portion and flows into the closed space, Calculation method. delete

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