JP2012105841A - Negative pressure wound treatment device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a negative pressure wound treatment device including a pressure measuring tube in which exudate and suspended matters in the exudate do not easily get stuck.SOLUTION: A closed part is formed by covering a wound part 12 with a covering material 14 including a supply hole 15 and a discharge hole 17. A supply tube connection component 16 is connected to the supply hole 15, and a washing liquid supply tube 21 and a pressure measuring tube 27 are connected to the supply tube connection component 16. A discharge tube connection component 18 is connected to the discharge hole 17, and an exudate discharge tube 22 is connected to the discharge tube connection component 18. Washing liquid 20 is supplied to the closed part through the washing liquid supply tube 21. While keeping the closed part at a negative pressure, the washing liquid 20 and waste and exudate generated from the wound part 12 are sucked and discharged through the exudate discharge tube 22. The magnitude of the negative pressure is measured through the pressure measuring tube 27.

Description

  The present invention relates to a negative pressure wound treatment apparatus.

  A flexible porous body (sponge-like object) that allows liquid to pass through is placed on the skin wound, and the porous body and surrounding skin are covered with a covering material (polymer film, etc.), and the inside is negatively pressurized. Negative pressure closure therapy is known in which fluid that exudes from a wound is aspirated and discharged while maintaining the same. A device used for such negative pressure closure therapy is a negative pressure wound treatment device.

  By maintaining a negative pressure while protecting the wound, granulation is promoted. At the same time, infectious waste and exudate are discharged. As a result, blood flow around the wound increases and blood circulation is promoted. As a result, the wound healing function is restored and healing of the wound is accelerated.

  In the negative pressure closure therapy in which only suction of the wound portion is performed, if the difference in height between the wound portion and the suction device changes, the negative pressure changes. For example, when the suction device is on the floor, the negative pressure increases as the wound height increases. Conversely, as the wound becomes lower, the negative pressure becomes smaller.

  Up and down movement of the wound due to patient movement is unavoidable, but the change in negative pressure due to it is undesirable. Therefore, in order to keep the negative pressure constant regardless of the vertical movement of the wound part, it is necessary to measure the pressure inside the dressing. Therefore, a method is known in which a pressure measurement tube different from the exudate discharge tube is connected to the wound part, and the pressure of the wound part is measured with a pressure gauge (for example, Patent Documents 1 and 2).

  In addition, exudate discharge and pressure with a single exudate discharge tube using a multi-lumen tube (multi-lumen tube) with a lumen for exudate discharge and a lumen for pressure measurement (lumen) A method of performing both measurements is known (for example, Patent Document 3).

  However, in the above-described prior art, there is a possibility that the exudate and the suspended matter in the exudate are clogged in the pressure measuring tube and the pressure measuring lumen and the accurate pressure cannot be measured.

  As a countermeasure, a method is known in which the shape of the inner surface of the connecting part (negative pressure adapter) between the coating material and the exudate discharge pipe is devised to prevent clogging of the pressure measurement pipe (for example, Patent Document 4). For this purpose, however, a very complicated inner surface connecting part (negative pressure adapter) is required.

  Further, a method is known in which the pressure of the exudate discharge pipe and the pressure of the pressure measurement pipe are alternately changed (flushing operation) to prevent clogging of the pressure measurement pipe (for example, Patent Document 5). However, this requires a plurality of open valves and a mechanism for controlling the complicated opening / closing timing.

  In-wound continuous negative pressure irrigation therapy is known in which suction is performed while injecting a cleaning solution (such as physiological saline) into a wound. A method of measuring negative pressure using a pressure measuring tube is also known in the wound negative pressure washing therapy (for example, Patent Document 6).

  FIG. 7 is a schematic view of a conventional negative pressure wound treatment apparatus 100 used for the in-wound continuous negative pressure washing therapy. The porous body 103 is placed on the surface of the wound portion 102 generated in the skin 101, and the porous body 103 and the surrounding skin 101 are covered with a covering material 104 and closed.

  A supply hole 105 is provided in the covering material 104, and the supply pipe connecting component 106 is bonded onto the covering material 104 so that the opening of the supply pipe connecting component 106 and the supply hole 105 are aligned. A cleaning liquid supply pipe 111 is connected to the supply pipe connecting part 106.

  A discharge hole 107 is provided in the covering material 104, and the discharge pipe connecting component 108 is bonded onto the covering material 104 so that the opening of the discharge pipe connecting component 108 and the discharge hole 107 are aligned. The exudate discharge pipe 112 and the pressure measurement pipe 117 are connected to the discharge pipe connecting part 108.

  A cleaning liquid 110 (such as physiological saline) in the cleaning liquid container 109 is supplied to the inside closed by the covering material 104 through the cleaning liquid supply pipe 111. Infectious waste and exudate produced from the wound portion 102 move inside the porous body 103 together with the cleaning liquid 110 and are sucked into the exudate discharge pipe 112. Waste and exudate are guided to the exudate storage container 113 through the exudate discharge pipe 112 and stored as exudate 114.

  Due to the action of the suction device 116 coupled to the exudate storage container 113 by the negative pressure adjusting tube 115, the inside closed by the covering material 104 is maintained at a negative pressure. The magnitude of the negative pressure is measured by the pressure gauge 118 through the pressure measuring pipe 117 connected to the discharge pipe connecting part 108.

  The negative pressure value measured by the pressure gauge 118 is fed back to the suction device 116 and an air release valve (not shown), and is used to keep the negative pressure inside closed by the covering material 104 constant.

  By maintaining negative pressure while protecting the wound part 102, granulation formation is promoted. At the same time, infectious waste and exudate are discharged together with the cleaning liquid 110. As a result, the blood flow around the wound portion 102 increases and blood circulation is promoted. As a result, the wound healing function is restored and healing of the wound 102 is accelerated.

  However, in the conventional negative pressure wound treatment apparatus 100, there is a possibility that the exudate and the suspended matter in the exudate are clogged in the pressure measuring tube 117 and the accurate pressure cannot be measured.

Japanese Patent No. 3859085 Japanese Patent No. 4068807 Japanese Patent No. 4369640 Special table 2009-525576 Special table 2009-525087 gazette Special table 2008-517690

  In order to keep the negative pressure of the closed part constant in both of the negative pressure closed wound therapy that performs suction only of the wound part and the in-wound continuous negative pressure washing therapy that performs suction while injecting a washing liquid into the wound part, Negative pressure must be measured accurately.

  However, in the conventional negative pressure wound treatment apparatus, there is a possibility that the exudate and the suspended matter in the exudate are clogged in the pressure measuring tube and the pressure measuring lumen and the accurate pressure cannot be measured.

  An object of the present invention is to realize a negative pressure wound treatment apparatus including a pressure measuring tube that is less likely to clog exudate and suspended matter in the exudate.

  (1) In the negative pressure wound treatment apparatus of the present invention, the wound part is covered with a covering material to form a closed part. A cleaning liquid supply pipe, a pressure measurement pipe, and an exudate discharge pipe are connected to the closing portion. The cleaning liquid is supplied to the closing portion through the cleaning liquid supply pipe. While keeping the closed part at a negative pressure, the washing liquid, waste products and exudate generated from the wound part are discharged through the exudate discharge pipe. A pressure measuring tube is provided in the vicinity of the cleaning liquid supply tube.

  The vicinity of the cleaning liquid supply pipe is filled with a clean cleaning liquid and there is almost no suspended matter. Since the cleaning liquid flows in a direction away from the cleaning liquid supply pipe, the possibility that the suspended matter approaches the pressure measuring pipe is low. Therefore, there is a low possibility that the pressure measuring tube is clogged with floating substances.

  (2) In the negative pressure wound treatment apparatus of the present invention, the pressure measuring tube branches off from the washing liquid supply tube.

  (3) In the negative pressure wound treatment apparatus of the present invention, the cleaning liquid supply tube is a multi-lumen tube including a cleaning liquid supply lumen and a pressure measurement lumen. The pressure measuring tube is connected to a pressure measuring lumen.

  (4) In the negative pressure wound therapy apparatus of this invention, a supply hole is provided in a coating | covering material and a supply pipe connection component is connected to a supply hole. The cleaning liquid supply pipe and the pressure measurement pipe are connected to a supply pipe connecting part.

  (5) In the negative pressure wound therapy apparatus of this invention, a supply hole is provided in a coating | covering material and a supply pipe connection component is connected to a supply hole. The cleaning liquid supply pipe is connected to a supply pipe connecting part. The pressure measuring pipe branches off from the cleaning liquid supply pipe. Alternatively, the pressure measuring tube is connected to a pressure measuring lumen.

  (6) In the negative pressure wound therapy apparatus of this invention, a supply pipe connection component is provided with the extension pipe | tube protruded on the lower surface. The extension tube can be adjusted to a desired length.

  The pressure measuring tube provided in the negative pressure wound treatment apparatus of the present invention is less likely to clog exudate and suspended matter in the exudate. The negative pressure wound treatment apparatus of the present invention does not require a plurality of open valves for preventing clogging of the pressure measuring tube or a complicated control mechanism thereof.

The schematic diagram of the 1st example of the negative pressure wound treatment apparatus of this invention The schematic diagram of the 2nd example of the negative pressure wound treatment apparatus of this invention Schematic diagram of a third example of negative pressure wound therapy apparatus of the present invention Schematic diagram of the fourth example of the negative pressure wound therapy apparatus of the present invention The schematic diagram of the 5th example of the negative pressure wound treatment apparatus of this invention Schematic diagram of the sixth example of the negative pressure wound treatment apparatus of the present invention Schematic diagram of conventional negative pressure wound therapy equipment

  Hereinafter, the negative pressure wound treatment apparatus of the present invention will be described with reference to the drawings. Elements common to the drawings are given the same reference numerals.

  FIG. 1 is a schematic diagram of a negative pressure wound treatment apparatus 10 of a first example of the present invention used for continuous negative pressure washing treatment within a wound. The porous body 13 is placed on the surface of the wound part 12 generated in the skin 11, and the porous body 13 and the surrounding skin 11 are covered with the covering material 14 and closed. A portion covered with the covering material 14 and closed is called a closed portion.

  A supply hole 15 is provided in the covering material 14, and the supply pipe connecting component 16 is bonded onto the covering material 14 by aligning the opening 16 c of the supply pipe connecting component 16 and the supply hole 15. A cleaning liquid supply pipe 21 and a pressure measurement pipe 27 are connected to the supply pipe connection component 16.

  A partial enlarged sectional view and a partial enlarged plan view of the supply pipe connecting component 16, the cleaning liquid supply pipe 21, and the pressure measuring pipe 27 are shown in the lower left part of FIG. The supply pipe connecting component 16 is made of a flexible synthetic resin, has a wide flange 16a around it, and has a space 16b inside and an opening 16c on the lower surface. An adhesive layer or an adhesive layer (not shown) for adhering to the covering material 14 is formed on the lower surface 16d of the flange 16a. The cleaning liquid supply pipe 21 and the pressure measurement pipe 27 are connected through the side surface of the supply pipe connecting component 16. The distal ends of the cleaning liquid supply pipe 21 and the pressure measurement pipe 27 open into the space 16 b of the supply pipe connection component 16.

  A discharge hole 17 is provided in the covering material 14, the opening 18 a of the discharge pipe connecting part 18 and the discharge hole 17 are aligned, and the discharge pipe connecting part 18 is bonded onto the covering material 14. An exudate discharge pipe 22 is connected to the discharge pipe connecting part 18. The structure of the discharge pipe connection part 18 is substantially the same as that of the supply pipe connection part 16.

  A cleaning liquid 20 (such as physiological saline) in the cleaning liquid container 19 is supplied to the inside closed by the covering material 14 through the cleaning liquid supply pipe 21. The cleaning liquid 20 can be naturally supplied by gravity, but is preferably supplied at a constant speed by a metering pump (not shown). Infectious waste and exudate produced from the wound part 12 move inside the porous body 13 together with the cleaning liquid 20 and are sucked into the exudate discharge pipe 22. Waste and exudate are guided to the exudate storage container 23 through the exudate discharge pipe 22 and stored as exudate 24.

  By the action of the suction device 26 coupled to the exudate storage container 23 by the negative pressure adjusting tube 25, the inside closed by the covering material 14 is maintained at a negative pressure. The magnitude of the negative pressure is measured by a pressure gauge 28 through a pressure measuring pipe 27 connected to the supply pipe connecting component 16.

  The negative pressure value measured by the pressure gauge 28 is fed back to the suction device 26 and an air release valve (not shown), and used for control to keep the internal negative pressure closed by the covering material 14 constant.

  The cleaning liquid 20 should flow evenly over the entire wound part 12 so that there is no portion to be retained. For this purpose, it is desirable that the flow path of the cleaning liquid 20 be as long as possible in the wound part 12. Therefore, the supply hole 15 and the discharge hole 17 are separated as much as possible and are provided near both ends of the porous body 13.

  When the pressure measuring tube 117 is connected to the discharge tube connecting part 108 as in the conventional negative pressure wound treatment apparatus 100 of FIG. 7, the suspended matter drawn by the exudate discharge tube 112 is transferred to the pressure measuring tube 117. There is a high possibility of clogging.

  On the other hand, in the negative pressure wound therapy apparatus 10 of the present invention shown in FIG. 1, a pressure measuring tube 27 is connected to the supply tube connecting component 16. The space 16b of the supply pipe connecting component 16 is filled with a clean cleaning liquid 20 and there is almost no suspended matter. Since the cleaning liquid 20 flows in a direction away from the supply pipe connecting component 16, the possibility that the suspended matter approaches the pressure measuring pipe 27 is low. Therefore, there is a low possibility that the pressure measuring tube 27 is clogged with floating substances.

  FIG. 2 is a schematic view of the negative pressure wound treatment apparatus 30 of the second example of the present invention used for the continuous negative pressure washing therapy in the wound. A partial enlarged sectional view and a partial enlarged plan view of the supply pipe connecting component 16, the cleaning liquid supply pipe 21, and the pressure measurement pipe 27 are shown in the lower left part of FIG.

  An extension pipe 16 e protrudes from the lower surface of the supply pipe connection component 16. The extension pipe 16 e is connected to the space portion 16 b of the supply pipe connection component 16. When it is desired to supply the cleaning liquid 20 near the wound part 12, the cleaning liquid 20 can be supplied near the wound part 12 by inserting the extension tube 16 e into the porous body 13. The extension tube 16e can be used by cutting according to the depth of the wound part 12 and adjusting the length.

  In the negative pressure wound therapy apparatus 30, the cleansing liquid 20 is filled up to the tip of the extension tube 16e. Therefore, compared with the negative pressure wound treatment apparatus 10 of FIG. 1, since the distance from the floating material to the pressure measuring tube 27 is long, the possibility that the floating material approaches the pressure measuring tube 27 is low. Therefore, even when compared with the negative pressure wound therapy apparatus 10, there is a low possibility that the pressure measurement tube 27 is clogged with floating substances.

  FIG. 3 is a schematic diagram of a negative pressure wound treatment apparatus 40 of the third example of the present invention used for continuous negative pressure washing treatment within a wound. A partial enlarged cross-sectional view and a partial enlarged plan view of the supply pipe connecting component 16, the cleaning liquid supply pipe 21, and the pressure measurement pipe 27 are shown in the lower left part of FIG.

  As shown in the partially enlarged cross-sectional view, the pressure measuring tube 27 branches from the cleaning liquid supply tube 21. In the negative pressure wound therapy apparatus 40, since the pressure measuring tube 27 is not connected to the supply tube connecting component 16, the supply tube connecting component 16 can be reduced in size.

  In the negative pressure wound therapy apparatus 40, the cleansing liquid 20 is filled up to the opening 16 c of the supply pipe connecting part 16. Since the pressure measurement tube 27 starts from a branch point with the washing liquid supply tube 21, the distance from the suspended matter to the pressure measurement tube 27 is longer than that of the negative pressure wound treatment apparatus 10 of FIG. Is less likely to approach. Therefore, even when compared with the negative pressure wound therapy apparatus 10, there is a low possibility that the pressure measurement tube 27 is clogged with floating substances.

  FIG. 4 is a schematic view of a negative pressure wound treatment apparatus 50 of the fourth example of the present invention used for continuous negative pressure lavage therapy in the wound. A partial enlarged cross-sectional view and a partial enlarged plan view of the supply pipe connecting component 16, the cleaning liquid supply pipe 21, and the pressure measurement pipe 27 are shown in the lower left part of FIG.

  An extension pipe 16 e protrudes from the lower surface of the supply pipe connection component 16. The extension pipe 16 e is connected to the space portion 16 b of the supply pipe connection component 16.

  As shown in the partially enlarged cross-sectional view, the pressure measuring tube 27 branches from the cleaning liquid supply tube 21. In the negative pressure wound therapy apparatus 50, since the pressure measuring tube 27 is not connected to the supply tube connecting component 16, the supply tube connecting component 16 can be reduced in size.

  In the negative pressure wound therapy apparatus 50, the cleansing liquid 20 is filled up to the tip of the extension tube 16e. The pressure measuring tube 27 starts from a branch point with the cleaning liquid supply tube 21. Therefore, compared with the negative pressure wound treatment apparatus 30 in FIG. 2 and the negative pressure wound treatment apparatus 40 in FIG. 3, the distance from the floating material to the pressure measurement tube 27 is longer, and the floating material may approach the pressure measurement tube 27. Low. Therefore, even if it compares with the negative pressure wound treatment apparatus 30 and the negative pressure wound treatment apparatus 40, possibility that the pressure measuring tube 27 will be clogged with a floating substance is low.

  FIG. 5 is a schematic view of a negative pressure wound therapy apparatus 60 of the fifth example of the present invention used for continuous negative pressure washing treatment within a wound. A partial enlarged sectional view and a partial enlarged plan view of the supply pipe connecting component 16 and the cleaning liquid supply pipe 34 are shown in the lower left part of FIG.

  In the upper right part of FIG. 5, a partial enlarged cross-sectional view of a connection portion between the cleaning liquid supply pipe 34 and the pressure measurement pipe 27 is shown. The cleaning liquid supply pipe 34 is a multi-lumen pipe including a cleaning liquid supply lumen 34a and a pressure measurement lumen 34b. There are many types of cross-sectional shapes of the pressure measurement lumen, such as a circular shape (pressure measurement lumen 34b) and a concentric shape (pressure measurement lumen 34c).

  As shown in the partially enlarged sectional view, the pressure measurement tube 27 is connected to a pressure measurement lumen 34 b in the cleaning liquid supply tube 34. There is no restriction on the connection position of the pressure measurement tube 27 and the cleaning liquid supply tube 34. As shown in FIG. 5, the pressure measurement pipe 27 may be connected to a position far from the supply pipe connection component 16.

  In the negative pressure wound therapy apparatus 60, since the pressure measuring tube 27 is not connected to the supply tube connecting component 16, the supply tube connecting component 16 can be reduced in size.

  In the negative pressure wound therapy apparatus 60, the cleansing liquid 20 is filled up to the opening 16 c of the supply pipe connecting part 16. Therefore, there is a low possibility that the suspended matter approaches the pressure measurement lumen 34b. Therefore, there is a low possibility that the pressure measurement lumen 34b is clogged with floating substances.

  FIG. 6 is a schematic view of a negative pressure wound treatment apparatus 70 of the sixth example of the present invention used for continuous negative pressure washing treatment within a wound. A partial enlarged sectional view and a partial enlarged plan view of the supply pipe connecting component 16 and the cleaning liquid supply pipe 34 are shown in the lower left part of FIG.

  An extension pipe 16 e protrudes from the lower surface of the supply pipe connection component 16. The extension pipe 16 e is connected to the space portion 16 b of the supply pipe connection component 16.

  In the upper right part of FIG. 6, a partial enlarged cross-sectional view of the connection portion between the cleaning liquid supply pipe 34 and the pressure measurement pipe 27 is shown. The pressure measurement tube 27 is connected to a pressure measurement lumen 34 b in the cleaning liquid supply tube 34.

  In the negative pressure wound therapy apparatus 70, since the pressure measuring tube 27 is not connected to the supply tube connecting component 16, the supply tube connecting component 16 can be downsized.

  In the negative pressure wound treatment apparatus 70, the cleansing liquid 20 is filled up to the tip of the extension tube 16e. Therefore, as compared with the negative pressure wound therapy apparatus 60 of FIG. 5, the distance from the floating substance to the pressure measurement lumen 34b is long, and the possibility that the floating substance approaches the pressure measurement lumen 34b is low. Therefore, even when compared with the negative pressure wound therapy apparatus 60, there is a low possibility that the pressure measurement lumen 34b is clogged with floating substances.

  The negative pressure wound treatment apparatus of the present invention is suitably used for continuous negative pressure washing therapy within a wound.

DESCRIPTION OF SYMBOLS 10 Negative pressure wound treatment apparatus 11 Skin 12 Wound part 13 Porous body 14 Covering material 15 Supply hole 16 Supply pipe connection component 16a 鍔 16b Space part 16c Opening part 16d Lower surface 16e Extension pipe 17 Exhaust hole 18 Exhaust pipe connection part 18a Opening part DESCRIPTION OF SYMBOLS 19 Cleaning liquid container 20 Cleaning liquid 21 Cleaning liquid supply pipe 22 Exudate liquid discharge pipe 23 Exudate liquid storage container 24 Exudate liquid 25 Negative pressure adjustment pipe 26 Suction device 27 Pressure measuring pipe 28 Pressure gauge 30 Negative pressure wound treatment apparatus 34 Cleaning liquid supply pipe 34a Cleaning liquid supply Lumen 34b Pressure measurement lumen 34c Pressure measurement lumen 40 Negative pressure wound therapy apparatus 50 Negative pressure wound therapy apparatus 60 Negative pressure wound therapy apparatus 70 Negative pressure wound therapy apparatus 100 Negative pressure wound therapy apparatus 101 Skin 102 Wound 103 Porous material 104 Coating material 105 Supply hole 106 Supply pipe connection part 107 Discharge hole 108 Discharge pipe connection part 109 Washing Liquid container 110 cleaning liquid 111 cleaning liquid supply pipe 112 exudate discharge pipe 113 exudate container 114 exudate 115 negative pressure adjusting tube 116 suction device 117 pressure measuring tube 118 manometer

Claims (6)

A dressing covering the wound and forming a closure;
A cleaning liquid supply pipe, a pressure measurement pipe and an exudate discharge pipe connected to the closure part;
A cleaning liquid supplied to the closing part through the cleaning liquid supply pipe;
In the negative pressure wound treatment apparatus for discharging the washing liquid, waste products and exudate generated from the wound part through the exudate discharge pipe while maintaining the closed part at a negative pressure,
The negative pressure wound treatment apparatus, wherein the pressure measuring tube is provided in the vicinity of the washing liquid supply tube.   The negative pressure wound treatment apparatus according to claim 1, further comprising the pressure measuring tube branched from the washing liquid supply tube. The cleaning liquid supply pipe is a multi-lumen pipe provided with a cleaning liquid supply lumen and a pressure measurement lumen;
The negative pressure wound therapy apparatus according to claim 1, further comprising the pressure measuring tube connected to the pressure measuring lumen. A supply hole provided in the covering material;
The negative pressure wound treatment device according to claim 1, further comprising a supply pipe connecting component connected to the cleaning liquid supply pipe, the pressure measuring pipe, and the supply hole. A supply hole provided in the covering material;
The negative pressure wound treatment device according to claim 2 or 3, further comprising a supply pipe connecting part connected to the cleaning liquid supply pipe and the supply hole. The supply pipe connecting component includes an extension pipe protruding on the lower surface,
The negative pressure wound therapy apparatus according to claim 4, wherein the extension tube can be adjusted to a desired length.

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