WO2018056060A1 - Appareil de thérapie de plaies par pression négative - Google Patents

Appareil de thérapie de plaies par pression négative Download PDF

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Publication number
WO2018056060A1
WO2018056060A1 PCT/JP2017/032214 JP2017032214W WO2018056060A1 WO 2018056060 A1 WO2018056060 A1 WO 2018056060A1 JP 2017032214 W JP2017032214 W JP 2017032214W WO 2018056060 A1 WO2018056060 A1 WO 2018056060A1
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WO
WIPO (PCT)
Prior art keywords
negative pressure
passage
suction
plate
tube
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Application number
PCT/JP2017/032214
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English (en)
Japanese (ja)
Inventor
松本　新一郎
Original Assignee
株式会社村田製作所
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Application filed by 株式会社村田製作所 filed Critical 株式会社村田製作所
Priority to JP2018515170A priority Critical patent/JP6361844B1/ja
Publication of WO2018056060A1 publication Critical patent/WO2018056060A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/02—Adhesive plasters or dressings
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M27/00—Drainage appliance for wounds or the like, i.e. wound drains, implanted drains

Definitions

  • the present invention relates to a negative pressure closure therapy device.
  • the negative pressure closure therapy device described in Patent Document 1 includes a film-like sticking member to be attached to an affected area, and a gauze disposed on one surface side of the sticking member. Moreover, the one end part of the tube is arrange
  • the negative pressure closure therapy device described in Patent Document 1 When negative pressure closure therapy is performed using the negative pressure closure therapy device described in Patent Document 1, moisture such as blood oozes from the affected area. When such moisture flows into the pump, the suction ability of the pump may be reduced or a failure may be caused.
  • the negative pressure closure therapy device described in Patent Document 1 is provided with a collection container for collecting and collecting water in the middle of the tube. However, when such a collection container is provided, an increase in the size of the pump used in the negative pressure closure therapy device is inevitable.
  • the present invention provides a negative pressure source, an adhesive member having adhesiveness on one surface, an air-permeable member having air permeability disposed on one surface side of the adhesive member, A plurality of suction passages provided between the sticking member and the breathable member, wherein one end of each suction passage communicates with a space formed by the sticking member and the breathable member; And an exhaust passage that connects the other end of the plurality of suction passages to the negative pressure source, and each of the plurality of suction passages has water permeability and loses breathability when exposed to moisture.
  • a sealing member is provided.
  • the moisture when moisture that has spread from the affected area is sucked by the suction passage, the moisture touches the water sealing member provided in the suction passage. And when a water seal member touches moisture, the air permeability of the water seal member is lost, and it becomes difficult to suck air through the suction passage. Accordingly, it is possible to suppress further suction of moisture from the suction passage that has sucked moisture. As a result, even without providing a container or the like for separating and storing moisture, the moisture can be prevented from flowing into the pump, and the pump can be prevented from being enlarged.
  • a plurality of suction passages are provided. Even if air cannot be sucked through any one of these suction passages, air can be sucked from other suction passages, so that the closed space between the sticking member and the affected part can be maintained at a negative pressure.
  • the plurality of suction passages extend radially around a predetermined radiation center, and ends of the respective suction passages on the radiation center side are connected to the exhaust passage, and the plurality of suction passages.
  • the predetermined radiation center of the passage may be located at a position closer to one side than the center of the air permeable member in a predetermined direction along the surface of the air permeable member.
  • the radial center of the suction passage is located on one side in the surface direction of the air-permeable member, and the suction passages are relatively densely arranged in the vicinity thereof.
  • the suction passages are not densely arranged on the other side in the surface direction of the sticking member as the one side. Therefore, when using a negative pressure closure therapy device of this configuration, it is assumed that the other side in the surface direction of the breathable member is applied to the wound in the affected area, and a lot of moisture oozes out on the other side. There is a high possibility of coming. And in the said structure, since the suction path is extended radially, the suction path is extended on the one side and the other side in the surface direction of a breathable member.
  • the negative pressure closure therapy device includes a housing, a passage connecting member having the exhaust passage partitioned inside the housing, and a plurality of holes communicating the exhaust passage and the outside of the housing. Further, a plurality of tube members may be provided in the plurality of holes, respectively, and the internal space of the plurality of tube members may further include the passage connection member that constitutes the suction passage.
  • the exhaust passage and the plurality of suction passages can be communicated with each other with a relatively simple structure in which the plurality of tube members are respectively disposed in the plurality of hole portions of the passage connection member. Therefore, it can suppress that the manufacturing cost of a negative pressure closure therapy instrument provided with the some suction passage connected to an exhaust passage is increased.
  • the passage connecting member includes a first plate member having an exhaust port for discharging the air flowing in from the suction passage to the outside of the housing, and a second plate member disposed to face the first plate member.
  • the first plate member is provided with a plurality of first concave grooves so as to be continuous with the exhaust passage, and the second plate member is respectively opposed to the plurality of first concave grooves.
  • a plurality of second concave grooves are provided, and the plurality of first concave grooves and the plurality of second concave grooves facing the plurality of first concave grooves constitute the plurality of hole portions.
  • the water sealing member is provided in the plurality of holes.
  • a water sealing member is arrange
  • the water sealing member can be provided in the suction passage by a relatively simple operation. As a result, it is possible to suppress the manufacturing process for providing the water sealing member in the suction passage from becoming complicated.
  • a piezoelectric pump connected to the exhaust passage may be provided, and the piezoelectric pump may be disposed between the sticking member and the breathable member.
  • an external pump is provided outside the closed space between the sticking member and the affected part, or connected to the external pump. There is no need to provide a pipe for this purpose. Therefore, it is possible to contribute to the downsizing and handling of the negative pressure closure therapy device.
  • the water sealing member may be made of at least one material selected from a water-absorbing polymer, a PVA sponge, a water-absorbing fiber, and a hydrophobic membrane.
  • the breathable member may be made of gauze.
  • the present invention it is possible to suppress the water that has spread from the affected area from flowing into the pump while suppressing the enlargement of the pump used in the negative pressure closure therapy device.
  • FIG. 2 is a sectional view taken along line 2-2 in FIG.
  • a negative pressure closure therapy device includes a film-like sticking member 11 formed of a transparent resin such as polyethylene. As shown in FIG. 2, the sticking member 11 has a substantially rectangular shape when seen in a plan view. The lower surface of the sticking member 11 has adhesiveness, and is an adhesive face 11a configured so that the sticking member 11 can be stuck to the affected part (skin).
  • a cloth-like first gauze 12 is disposed below the sticking member 11.
  • the first gauze 12 has a substantially rectangular shape in plan view, and the vertical and horizontal dimensions are smaller than the vertical and horizontal dimensions of the sticking member 11.
  • the 1st gauze 12 is arrange
  • the upper surface of the first gauze 12 is affixed to the adhesive surface 11 a of the affixing member 11.
  • the first gauze 12 has air permeability and hygroscopicity, and absorbs a certain amount of water that has spread from the affected area.
  • a cloth-like second gauze 13 is disposed below the sticking member 11 and further below the first gauze 12.
  • the second gauze 13 has a substantially rectangular shape in plan view, and the vertical and horizontal dimensions are the same as those of the first gauze 12.
  • the second gauze 13 is arranged so as to overlap the first gauze 12 when viewed in plan.
  • the peripheral edge on the upper surface of the second gauze 13 is fixedly adhered to the peripheral edge on the lower surface of the first gauze 12 with an adhesive (not shown).
  • the second gauze 13 has air permeability and hygroscopicity, and absorbs a certain amount of water that has spread from the affected area.
  • the second gauze 13 corresponds to a breathable member.
  • a plurality of tube members 15 are provided between the first gauze 12 and the second gauze 13 in the vertical direction.
  • the tube member 15 is formed in a tubular shape with a resin such as polyethylene.
  • the plurality of tube members 15 extend radially about the radial center C in the surface direction of the sticking member 11.
  • eight tube members 15 are provided at an interval of approximately 45 degrees in the circumferential direction centered on the radiation center C.
  • An end portion 15 b (sometimes referred to as a base end or an inner end) on the radiation center side of each tube member 15 reaches the inside of the passage connection member 20.
  • the internal space of each tube member 15 constitutes a suction passage 15a.
  • a tip 15 c (sometimes referred to as an outer end) opposite to the end portion 15 b is disposed in a space 14 formed by the sticking member 11 and the second gauze 13 and communicates with the space 14. is doing.
  • the passage connecting member 20 can include a housing 20 a configured by a first plate member 21 and a second plate member 25 disposed to face the lower side of the first plate member 21. .
  • a water seal member 30 is disposed between the first plate member 21 and the second plate member 25.
  • plate material 25 are disk shape, for example, and the 1st board
  • a plurality of first concave grooves 22 are provided on the lower surface of the first plate member 21.
  • the first concave groove 22 is substantially semicircular when viewed in cross section.
  • the first groove 22 extends radially from the center of the first plate 21 in the surface direction of the first plate 21.
  • eight first concave grooves 22 are provided in the circumferential direction of the first plate member 21 at an interval of approximately 45 degrees.
  • a cylindrical exhaust port 23 is provided on the upper side surface of the first plate member 21 so as to protrude upward.
  • the exhaust port 23 is configured to discharge the air that has flowed into the housing 20a from the tube member 15 to the outside of the housing 20a.
  • the exhaust port 23 is provided at the center of the first plate 21 in the surface direction of the first plate 21.
  • the inside of the exhaust port 23 passes through the first plate 21 in the thickness direction and opens on the lower surface of the first plate 21.
  • the second plate member 25 has a disk shape with the same diameter as the first plate member 21.
  • a plurality of second concave grooves 26 are provided on the upper side surface of the second plate member 25.
  • the second concave groove 26 is substantially semicircular when viewed in cross section.
  • the second concave grooves 26 extend radially from the center of the second plate member in the surface direction of the second plate member 25.
  • eight second concave grooves 26 are provided in the circumferential direction of the second plate member 25 at an interval of approximately 45 degrees.
  • plate material 25 is arrange
  • the second plate member 25 is positioned with respect to the first plate member 21 so that the second groove 26 of the second plate member 25 and the first groove 22 of the first plate member 21 face each other.
  • the passage connecting member 20 has a substantially circular shape in cross-section by opposing arrangement of the first concave groove 22 of the first plate member 21 and the second concave groove 26 of the second plate member 25.
  • a hole 28 is formed.
  • the water seal member 30 has an annular shape and the thickness in the vertical direction is larger than the diameter of the tube member 15.
  • the water sealing member 30 is arranged so that the center of the ring coincides with the center of the first plate member 21 in the surface direction.
  • the water sealing member 30 is porous having continuous pores, and is formed of a water-absorbing polymer material (for example, sodium polyacrylate).
  • the porous water-absorbing polymer material is obtained by once absorbing water into the water-absorbing polymer material and then sublimating the water by freeze drying or polymerizing the monomer while foaming with a foaming agent. be able to.
  • the water sealing member 30 is sandwiched between the first plate member 21 and the second plate member 25 and is compressed vertically by these members.
  • the vertical interval between the first plate member 21 and the second plate member 25 is relatively short in the flat portion where the first groove 22 and the second groove 26 are not provided.
  • the hole portion 28 in which the groove 22 and the second concave groove 26 are provided is relatively long. Therefore, in the water sealing member 30, in the location pinched
  • the water sealing member 30 has air permeability inside the hole 28.
  • a space 30 a between the first plate member 21 and the second plate member 25 and radially inward of the water seal member 30 communicates with the internal space 23 a of the exhaust port 23 of the first plate member 21.
  • This space 30 a constitutes an exhaust passage together with the internal space 23 a of the exhaust port 23.
  • An adhesive (not shown) is filled between the flat portion of the first plate member 21 and the flat portion of the second plate member 25 so that the first plate member 21 and the second plate member 25 are not separated from each other in the vertical direction. ing.
  • each hole portion 28 of the passage connection member 20 an end portion 15b on the radiation center side of the tube member 15 is inserted.
  • the radial center C of the tube member 15 is In the plane direction, it coincides with the center of the first plate 21 and the center of the second plate 25.
  • An end 15 b on the radial center side of the tube member 15 is in contact with the outer peripheral surface of the water seal member 30.
  • the water seal member 30 is provided at the end of the suction passage 15 a that is the internal space of the tube member 15.
  • the passage connecting member 20 is disposed closer to one side (right side in FIG. 2) than the center of the second gauze 13 in the longitudinal direction of the second gauze 13 (left and right direction in FIG. 2). ing.
  • the radiation center C of the tube member 15 coincides with the center of the first plate member 21 and the center of the second plate member 25 in the surface direction, the radiation center C of the tube member 15 is also the second gauze 13. In the longitudinal direction, the second gauze 13 is closer to one side than the center.
  • a negative pressure source is attached to the upper side of the passage connecting member 20.
  • the negative pressure source is the piezoelectric pump 40 for discharging the air in the closed space between the sticking member 11 and the affected part to the outside.
  • the piezoelectric pump 40 is configured by laminating a plurality of square plate members in plan view. In FIG. 6, the thickness relationship of each layer is illustrated in a simplified manner, and may not match the actual thickness of each layer of the piezoelectric pump 40.
  • a suction port 41 a for introducing air into the piezoelectric pump 40 is provided at the center of the bottom plate member 41 located on the lowermost side among the plurality of plates constituting the piezoelectric pump 40.
  • the suction port 41a has a circular shape in plan view.
  • the inner diameter of the circular suction port 41a is substantially the same as the outer diameter of the exhaust port 23 of the passage connection member 20, so that the exhaust port 23 of the passage connection member 20 can be connected to the inside of the suction port 41a. It has become.
  • the first passage constituting member 42 is provided with a plurality (two in FIG. 6) of first suction passages 42a extending from the center of the first passage constituting member 42 to the outside.
  • the first suction passage 42a communicates with the suction port 41a of the bottom plate member 41 at a central portion.
  • a plate-like first separator 43 is stacked on the upper side of the first passage constituting member 42.
  • the first separator 43 is provided with a plurality of (two in FIG. 6) through-holes 43a penetrating the first separator 43.
  • the through hole 43a has a circular shape in plan view.
  • the through hole 43a is provided at a position corresponding to the outer end of the first suction passage 42a in the first passage component 42, and communicates with the first suction passage 42a.
  • a plate-like lower frame member 44 is laminated on the upper side of the first separator 43.
  • the lower frame member 44 is provided with a plurality of (two in FIG. 6) through-holes 44 a that penetrate the lower frame member 44.
  • the through hole 44a has a circular shape with the same diameter as the through hole 43a of the first separator 43, and is provided at a position facing the through hole 43a.
  • a circular opening 44 b is provided at the center of the lower frame member 44.
  • the diameter of the opening 44b is more than half the length of one side of the square-shaped lower frame member 44. In this embodiment, the diameter of the opening 44b is approximately two-thirds of the square-shaped lower frame member 44.
  • a diaphragm plate 45 is laminated on the upper side of the lower frame member 44.
  • the diaphragm plate 45 is made of a flexible metal plate.
  • the diaphragm plate 45 is provided with a plurality of (two in FIG. 6) through-holes 45 a that penetrate the diaphragm plate 45.
  • the through hole 45a has a circular shape with the same diameter as the through hole 44a of the lower frame member 44, and is provided at a position facing the through hole 44a.
  • a disk-shaped piezoelectric element 50 is provided on the lower surface of the diaphragm plate 45. The outer diameter of the piezoelectric element 50 is smaller than the inner diameter of the opening 44 b of the lower frame member 44.
  • the piezoelectric element 50 is attached to the center of the lower surface of the diaphragm plate 45 and is accommodated in the opening 44 b of the lower frame member 44.
  • the piezoelectric element 50 is a unimorph type (monomorph type) element in which electrode plates are attached to both sides of a plate-like piezoelectric ceramic.
  • a plate-like upper frame member 46 is laminated on the upper side of the diaphragm plate 45.
  • the upper frame member 46 is provided with a plurality of (two in FIG. 6) through holes 46a that penetrate the upper frame member 46.
  • the through hole 46a has a circular shape with the same diameter as the through hole 45a of the diaphragm plate 45, and is provided at a position facing the through hole 45a.
  • a circular opening 46 b is provided at the center of the upper frame member 46.
  • the diameter of the opening 46 b is the same as the diameter of the opening 44 b of the lower frame member 44.
  • the opening 46b is provided at a position overlapping the opening 44b of the lower frame member 44 in the surface direction.
  • a plate-like second separator 47 is laminated on the upper side of the upper frame member 46.
  • the second separator 47 is provided with a plurality of (two in FIG. 6) through-holes 47a penetrating the second separator 47.
  • the through hole 47a has a circular shape with the same diameter as the through hole 46a of the upper frame member 46, and is provided at a position facing the through hole 46a.
  • the through hole 43a of the first separator 43, the through hole 44a of the lower frame member 44, the through hole 45a of the diaphragm plate 45, the through hole 46a of the upper frame member 46, and the through hole of the second separator 47a communicates with each other, and thereby, a communication path 40a extending upward from the first suction path 42a of the first path component 42 is configured.
  • a circular blower hole 47b penetrating the second separator 47 is provided in the center of the second separator 47.
  • the inner diameter of the blower hole 47 b is smaller than the inner diameter of the opening 46 b of the upper frame member 46.
  • the blower chamber S is defined by the lower surface of the second separator 47, the inner peripheral surface of the opening 46 b in the upper frame member 46, and the upper surface of the diaphragm plate 45.
  • the blower hole 47 b of the second separator 47 communicates with the blower chamber S.
  • a plate-like second passage constituting member 48 is laminated on the upper side of the second separator 47.
  • the second passage constituting member 48 is provided with a plurality of (two in FIG. 6) second suction passages 48a extending from the center of the second passage constituting member 48 to the outside.
  • the second suction passage 48a communicates with the through hole 47a (communication passage 40a) of the second separator 47 in the outer portion.
  • the second suction passage 48a communicates with the blower hole 47b of the second separator 47 in the central portion.
  • a plate-like top plate member 49 is laminated on the upper side of the second passage constituting member 48.
  • the top plate member 49 is provided with a discharge port 55 for discharging air from the inside of the piezoelectric pump 40.
  • the discharge port 55 has a cylindrical shape protruding upward.
  • the inside of the discharge port 55 passes through the top plate member 49 in the thickness direction and opens on the lower surface of the top plate member 49.
  • the inner diameter of the discharge port 55 is circular with the same diameter as the blower hole 47 b of the second separator 47.
  • the lower opening of the discharge port 55 faces the blower hole 47b of the second separator 47 with the second suction passage 48a of the second passage constituting member 48 interposed therebetween.
  • the discharge port 55 passes through the first gauze 12 and the adhesive member 11 and opens on the upper surface of the adhesive member 11 (the outer surface of the negative pressure closure therapy device).
  • a drive circuit 60 for driving the piezoelectric pump 40 is provided between the first gauze 12 and the second gauze 13 in the vertical direction.
  • the drive circuit 60 includes a battery for supplying power to the piezoelectric element 50 of the piezoelectric pump 40, a control circuit for controlling a voltage applied to the piezoelectric element 50, and the like.
  • the drive circuit 60 is provided with a switch 61 for switching start / stop of power supply from the battery of the drive circuit 60 to the piezoelectric element 50.
  • the switch 61 is a push button switch that switches between start and stop of power supply each time it is pressed.
  • the drive circuit 60 is disposed on one side (the side on which the passage connection member 20 is approached) from the passage connection member 20 and the piezoelectric pump 40 in the longitudinal direction of the second gauze 13. That is, the drive circuit 60 is disposed closer to the ends than the passage connection member 20 and the piezoelectric pump 40.
  • the drive circuit 60 is separated from the passage connecting member 20 in the surface direction of the second gauze 13. Note that the drive circuit 60 and the piezoelectric element 50 of the piezoelectric pump 40 are electrically connected via a signal line and a power supply line (not shown).
  • the operation of the negative pressure closure therapy device configured as described above will be described.
  • the piezoelectric pump 40 When no voltage is applied to the piezoelectric element 50 of the piezoelectric pump 40, the piezoelectric element 50 and the diaphragm plate 45 are not bent and are substantially flat as shown in FIG. In this state, when a predetermined voltage is applied to the piezoelectric element 50 from the drive circuit 60, the piezoelectric element 50 bends so that the center side in the width direction protrudes downward as shown in FIG. Along with this, the diaphragm plate 45 also bends so that the center side in the width direction protrudes downward.
  • the piezoelectric element 50 bends so that the center in the width direction protrudes upward as shown in FIG. Accordingly, the diaphragm plate 45 also bends so that the center side in the width direction protrudes upward. At this time, since the volume of the blower chamber S partitioned on the upper side of the diaphragm plate 45 is reduced, air flows out from the blower chamber S through the blower hole 47b.
  • action at the time of performing negative pressure closure therapy using said negative pressure closure therapy apparatus is demonstrated.
  • the lower surface of the application member 11 in the negative pressure closure therapy device configured as described above is attached to the affected part (skin).
  • the passage connecting member 20 and the piezoelectric pump 40 are brought closer to one side in the longitudinal direction of the second gauze 13 (right side in FIG. 2).
  • the passage connecting member 20, the piezoelectric pump 40, and the like are not disposed on the other longitudinal side of the second gauze 13 (left side in FIG. 2). Therefore, the sticking member 11 is stuck to the affected part so that the other part in the longitudinal direction of the second gauze 13 is in contact with the wound surface in the affected part.
  • the piezoelectric pump 40 is driven by pressing the switch 61 of the drive circuit 60 from above the sticking member 11.
  • the piezoelectric pump 40 is driven, air in the closed space is sucked through each tube member 15 and discharged to the outside. As a result, the closed space between the sticking member 11 and the affected part becomes negative pressure.
  • the water sealing member 30 loses air permeability at the contact portion with the tube member 15, and the end 15b on the radial center side of the tube member 15 that has sucked moisture is blocked by the swollen water sealing member 30. It becomes. Thereafter, air and moisture are not sucked through the tube member 15 and the moisture reaches the piezoelectric pump 40 is suppressed.
  • the water sealing member 30 of this embodiment is an annular one-piece member, if the amount of moisture reaching the water sealing member 30 is large, only the contact portion of the water sealing member 30 with the tube member 15 is used. In addition, the entire water sealing member 30 may swell. However, as described above, when a certain amount of moisture is sucked through the tube member 15, the end 15 b of the tube member 15 is blocked by the water sealing member 30, and moisture is sucked further. Is suppressed. Therefore, it is unlikely that the end portions 15b of all the tube members 15 are blocked by the swollen water sealing members 30 due to the suction of moisture from some of the tube members 15. Therefore, even if some of the tube members 15 suck moisture, air can be sucked through the other tube members 15 that are not sucking moisture, and the closed space between the sticking member 11 and the affected part can be reduced. Negative pressure is maintained.
  • the following effects can be achieved.
  • the moisture touches the water seal member 30 provided at the end 15 b of the tube member 15 and is absorbed.
  • the continuous pores are blocked by the water sealing member 30 absorbing moisture, and air and moisture cannot be sucked again through the tube member 15 once sucked moisture. Accordingly, it is possible to suppress further suction of moisture from the tube member 15 that has suctioned moisture once.
  • the inflow of moisture into the piezoelectric pump 40 can be suppressed without providing a container or the like for separating and storing moisture as in the negative pressure closure therapy device described in Patent Document 1.
  • the increase in the size of the negative pressure closure therapy device can be suppressed.
  • the radiation center C of the tube member 15 that is, the center of the passage connection member 20 is close to one side in the longitudinal direction of the second gauze 13. Therefore, a hard object such as the passage connecting member 20 and the piezoelectric pump 40 does not exist on the other side of the second gauze 13 in the longitudinal direction, and the tube members 15 are not arranged so densely. Therefore, the other side in the longitudinal direction of the second gauze 13 can be used as a location that hits the wound surface in the affected area, and if used in this way, the passage connecting member 20 and the tube member 15 will hit the wound in the affected area. Can be suppressed.
  • the plurality of tube members 15 extend radially, even if a large amount of water starts to exude locally at some part in the surface direction of the second gauze 13, the water starts to exude. Moisture is not easily sucked from the tube member 15 extending on the opposite side to the portion where the tube member 15 is located, and the tube member 15 is not easily blocked by the water sealing member 30 swelled. Therefore, a situation in which all the tube members 15 are blocked by the swollen water sealing member 30 and the closed space between the sticking member 11 and the affected part cannot be maintained at a negative pressure is unlikely to occur.
  • the radiation center C of the tube member 15 is disposed on one side in the longitudinal direction of the second gauze 13
  • the radiation center C is disposed on one side in the longitudinal direction of the second gauze 13. It can suppress more reliably that the tube member 15 which extends will attract
  • the suction passage 15 a that is the internal space of the tube member 15 and the water sealing member 30 are formed by a relatively simple structure in which the tube member 15 is communicated with the hole 28 of the passage connection member 20.
  • a space 30a on the radially inner side and an exhaust passage constituted by the internal space 23a of the exhaust port 23 are connected. Therefore, for example, it is possible to easily connect the exhaust passage and the suction passage 15a as compared with a structure in which the tube members 15 are individually connected to one tubular member. Therefore, when employing the plurality of tube members 15 (suction passages 15a), it is possible to suppress an increase in the manufacturing cost of the negative pressure closure therapy device.
  • the water sealing member 30 is disposed at the end 15b of the tube member 15 (suction passage 15a) by being sandwiched between the first plate member 21 and the second plate member 25 in the passage connection member 20. . Therefore, for example, the water sealing member 30 can be easily provided in the suction passage 15a as compared with the case where the water sealing member 30 is filled in each tube member 15.
  • the number of parts can be reduced as compared with the case where the water sealing member 30 is provided for each tube member 15. .
  • the water sealing member 30 may be sucked into the piezoelectric pump 40 as foreign matter together with the air when the piezoelectric pump 40 sucks air.
  • the water seal member 30 of the above embodiment is correspondingly large with respect to the size of the exhaust port 23, so it is unlikely that the water seal member 30 is sucked into the piezoelectric pump 40.
  • the continuous pores of the water sealing member 30 may not be completely closed. If at least a part of the continuous pores of the water sealing member 30 is blocked and the air permeability of the water sealing member 30 is lowered, the tube member 15 (suction passage 15a) provided with the water sealing member 30 is used. Inhalation of further moisture is suppressed.
  • the piezoelectric pump 40 since the piezoelectric pump 40 is built in between the first gauze 12 and the second gauze 13, it is not necessary to connect an external pump. Therefore, it is not necessary to provide a tube connecting the negative pressure closure therapy device and the external pump, and it is possible to contribute to the downsizing and handling of the negative pressure closure therapy device.
  • the piezoelectric pump 40 since the piezoelectric pump 40 is small in size, when the volumes of the first suction passage 42a, the communication passage 40a, the second suction passage 48a, and the blower chamber S in the inside thereof are small, moisture is sucked. Degradation of performance or failure is likely to occur. It is very effective to apply a configuration in which the tube member 15 that has sucked water by the water sealing member 30 is closed to such a negative pressure closure therapy device using the piezoelectric pump 40.
  • the passage connecting member 20 and the drive circuit 60 are spaced apart from each other in the surface direction of the second gauze 13. Therefore, the heat generated by the drive circuit 60 is transmitted to the water seal member 30 of the passage connection member 20, and the risk of adversely affecting the water absorption of the water seal member 30 can be reduced.
  • the above embodiment can be modified as follows.
  • -The planar view shape of the sticking member 11, the 1st gauze 12, and the 2nd gauze 13 does not need to be a rectangular shape. For example, it may be square or circular.
  • the sticking member 11, the 1st gauze 12, and the 2nd gauze 13 may not be a thing of a plane shape, and may be curving in circular arc shape.
  • the shapes of the affixing member 11, the first gauze 12, and the second gauze 13 may be determined in consideration of the size and part of the affected part that is assumed to be used.
  • first gauze 12 and the second gauze 13 members of other materials may be provided.
  • the nonwoven fabric formed with the absorbent cotton which is not cloth-like, or a synthetic resin may be sufficient. Any material can be applied as long as it has air permeability that allows air to be sucked through each tube member 15.
  • each tube member 15, passage connecting member 20, piezoelectric pump 40, and drive circuit 60 can appropriately prevent the adhesive member 11 from being pierced or torn when it touches the adhesive member 11,
  • One gauze 12 can be omitted.
  • the number of tube members 15 is not limited to eight. If a plurality of tube members 15 are provided, the number may be seven or less, or nine or more. In the above embodiment, the plurality of tube members 15 are arranged at predetermined angular intervals (45 degree intervals) in the circumferential direction around the radiation center C, but the intervals in the circumferential direction of the tube members 15 are not limited. Even if the circumferential intervals of the tube members 15 are not equal, if the plurality of tube members 15 extend in the radial direction from the radial center C, it can be said that the tube members 15 extend radially.
  • each tube member 15 suction passage 15a
  • a plurality of tube members 15 may extend in parallel to each other.
  • the end 15b of the tube member 15 is in contact with the water seal member 30, but it is not necessarily required to be in contact.
  • a suction passage is formed by the internal space of the hole portion 28 between the end portion 15 b of the tube member 15 and the water sealing member 30.
  • the position of the passage connecting member 20 in the surface direction of the second gauze 13, that is, the position of the radiation center C of the tube member 15 (suction passage 15 a) in the surface direction of the second gauze 13 is not limited to the example of the above embodiment. .
  • the radiation center C of the tube member 15 (suction passage 15a) may be located at the center in the longitudinal direction of the second gauze 13.
  • the plan view shape of the passage connecting member 20 (the first plate member 21 and the second plate member 25) is not limited to a circle.
  • a square shape may be used in accordance with the planar view shape of the piezoelectric pump 40, or a shape other than that may be used.
  • the first concave groove 22 of the first plate 21 in the passage connection member 20 does not necessarily reach the center of the first plate 21. It is sufficient that at least the position corresponding to the inner edge of the water sealing member 30 is reached in the radial direction of the first plate member 21. This also applies to the second concave groove 26 of the second plate member 25.
  • the tube member 15 does not have to be inserted into the hole 28 of the passage connection member 20.
  • a portion of the hole 28 of the passage connecting member 20 that is radially outward from the water seal member 30 constitutes a suction passage.
  • the shape of the water seal member 30 is not limited to an annular shape. Any shape that can fill the inside of the hole 28 of the passage connecting member 20 may be used, and for example, a disk shape may be used.
  • a separate water sealing member 30 may be provided for each tube member 15.
  • the water sealing member 30 of the above embodiment may be divided into eight equal parts in the circumferential direction.
  • a water seal member 35 may be provided at the end 15 c of each tube member 15 on the side opposite to the passage connection member 20 so as to close the opening of the tube member 15.
  • a spherical water sealing member having a diameter approximately equal to the inner diameter of the hole 28 of the passage connecting member 20 may be disposed inside each hole 28.
  • the housing 20a of the passage connecting member 20 may be formed of a one-piece member instead of the first plate member 21 and the second plate member 25.
  • each of the water sealing members 30 configured to tightly fit each hole 28 of the housing 20a which is a one-piece member is provided.
  • the hole 28 can be filled.
  • each tube member 15 may be connected to the tube material, and the inside of each tube member 15 may be filled with a water seal member.
  • the material of the water sealing member 30 is not particularly limited as long as the material has continuous pores and the continuous pores are closed by contact with moisture.
  • a polyvinyl alcohol sponge (PVA sponge) or a water absorbent fiber may be used. Even with these materials, when the moisture is touched, the moisture is absorbed inside and the continuous pores are blocked.
  • the filter made from a hydrophobic membrane may be sufficient.
  • the hydrophobic membrane has pores (continuous pores) formed in the film thickness direction and has air permeability in the absence of moisture. When moisture comes into contact with the hydrophobic membrane, moisture cannot enter the pores (continuous pores) due to surface tension with respect to the hydrophobic membrane, and the moisture blocks the pores (continuous pores) on the surface of the hydrophobic membrane.
  • the tube member 15 can be directly connected to the piezoelectric pump 40.
  • the tube member 15 may be connected to the plurality of communication passages 40 a of the piezoelectric pump 40.
  • a suction passage is constituted by the internal space of the tube member 15, the communication passage 40a of the piezoelectric pump 40, and the second suction passage 48a.
  • the inside of the discharge port 55 of the piezoelectric pump 40 constitutes an exhaust passage.
  • the water seal member may be filled into any of the internal space of the tube member 15, the communication passage 40a of the piezoelectric pump 40, and the second suction passage 48a.
  • the piezoelectric pump 40 disposed between the first gauze 12 and the second gauze 13 is used as the negative pressure source, but the negative pressure source is not limited to the piezoelectric pump 40. As long as it has a size that can be arranged between the first gauze 12 and the second gauze 13 and can maintain a closed space between the adhesive member 11 and the affected part at a negative pressure, any Even a pump can be applied as a negative pressure source.
  • An external pump may be provided in place of the piezoelectric pump 40. Even when the external pump is provided as described above, the suction of moisture into the external pump due to the presence of the water sealing member 30 is appropriately suppressed. Therefore, it is not necessary to provide a collection container for collecting moisture in the external pump, which can contribute to downsizing of the external pump. When an external pump is provided in place of the piezoelectric pump 40, the pump is not provided in the space 14 formed by the sticking member 11 and the air permeable member 13.
  • the drive circuit 60 may be disposed, for example, between the passage connection member 20 and the piezoelectric pump 40, or may be stacked on the upper side of the piezoelectric pump 40. In this case, it is not necessary to secure a space for providing the drive circuit 60 in the surface direction of the second gauze 13.
  • the drive circuit 60 does not necessarily need to be arrange
  • the drive circuit 60 may be attached to the outer surface of the sticking member 11 and may be electrically connected to the piezoelectric pump 40 via a signal line and a power line.
  • the drive circuit 60 is provided outside, it is possible to replace the battery of the drive circuit 60 without removing the sticking member 11 once attached to the affected area.
  • the entire lower surface of the adhesive member 11 is the adhesive surface 11a, but the lower surface of the adhesive member 11 can include an adhesive surface and a non-adhesive surface.
  • the adhesive surface may be a belt-like adhesive surface provided on at least the outer edge of the lower surface of the sticking member 11.
  • a negative pressure closure therapy device used by being attached to a patient so as to cover a part or all of the affected part of the patient, A breathable innermost layer (13) having a patient contacting surface;
  • An outermost layer (11) including an adhesive surface (11a) configured to adhere to a patient's skin, the space (14) between the breathable innermost layer (13) and the outermost layer (11)
  • the outermost layer (11) covering the entire breathable innermost layer (13), so that A plurality of tube members (15) disposed in the space (14) between the breathable innermost layer (13) and the outermost layer (11), wherein the breathable innermost layer (13) in plan view
  • a plurality of tube members (15) including a plurality of distal end openings distributed at different positions and a plurality of end openings opposite to the plurality of distal end openings; So that the air in the space (14) between the breathable innermost layer (1
  • a negative pressure source (40) configured to be in airtight communication with the plurality of tube members (15);
  • a liquid sensing material block disposed downstream of the plurality of end openings of the plurality of tube members (15) and upstream of the negative pressure source (40) and having air permeability in a dry state and losing air permeability in a wet state (30)
  • the liquid sensing material block (30) flows out from the end opening of one or more tube members of the plurality of tube members (15)
  • the liquid sensing material block (30) is locally wet by the flowed-out liquid, and the liquid sensing A wet portion of the material block (30) selectively blocks the end opening of the one or more tube members from which the liquid has flowed out, and from the end opening of the one or more tube members from which the liquid has flowed out.
  • Negative pressure closure therapy device characterized in that the flow of gas and liquid to the negative pressure source (40) is blocked.
  • SYMBOLS 11 Pasting member (outermost layer), 12 ... 1st gauze, 13 ... 2nd gauze (breathable member, breathable innermost layer), 15 ... Tube member, 15a ... Suction passage, 20 ... Passage connection member, 21 ... First DESCRIPTION OF SYMBOLS 1 board

Abstract

Dans la présente invention, un élément de connexion de trajet 20 est disposé entre un élément d'application 11 et un élément perméable 13. Dans l'élément de connexion de trajet 20, un élément tubulaire 15 est inséré à travers une partie de trou 28 qui est formée par un une première rainure évidée 22 d'une première plaque 21 et une seconde rainure évidée 26 d'une seconde plaque 25 étant disposées l'une en face de l'autre. L'espace intérieur de l'élément tubulaire 15 forme un trajet d'aspiration 15a. Sur une partie d'extrémité 15b de l'élément tubulaire 15, un élément d'étanchéité à l'eau 30 annulaire est prévu. L'élément d'étanchéité à l'eau 30 est formé à partir d'un matériau qui a des cellules ouvertes qui se ferment lorsque le matériau est mis en contact avec l'humidité. Lorsque l'élément tubulaire 15 absorbe l'humidité et que l'humidité atteint l'élément d'étanchéité à l'eau 30, les cellules ouvertes de l'élément d'étanchéité à l'eau 30 se ferment, empêchant l'humidité d'être absorbée par l'élément tubulaire 15.
PCT/JP2017/032214 2016-09-23 2017-09-07 Appareil de thérapie de plaies par pression négative WO2018056060A1 (fr)

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WO2020139475A3 (fr) * 2018-12-26 2020-08-20 Kci Licensing, Inc. Adaptateur de pompe piézoélectrique de thérapie par pression négative
USD898925S1 (en) 2018-09-13 2020-10-13 Smith & Nephew Plc Medical dressing
US11096831B2 (en) 2016-05-03 2021-08-24 Smith & Nephew Plc Negative pressure wound therapy device activation and control
US11116669B2 (en) 2016-08-25 2021-09-14 Smith & Nephew Plc Absorbent negative pressure wound therapy dressing
US11123471B2 (en) 2017-03-08 2021-09-21 Smith & Nephew Plc Negative pressure wound therapy device control in presence of fault condition
US11160915B2 (en) 2017-05-09 2021-11-02 Smith & Nephew Plc Redundant controls for negative pressure wound therapy systems
US11173240B2 (en) 2016-05-03 2021-11-16 Smith & Nephew Plc Optimizing power transfer to negative pressure sources in negative pressure therapy systems
US11285047B2 (en) 2016-04-26 2022-03-29 Smith & Nephew Plc Wound dressings and methods of use with integrated negative pressure source having a fluid ingress inhibition component
US11305047B2 (en) 2016-05-03 2022-04-19 Smith & Nephew Plc Systems and methods for driving negative pressure sources in negative pressure therapy systems
US11497653B2 (en) 2017-11-01 2022-11-15 Smith & Nephew Plc Negative pressure wound treatment apparatuses and methods with integrated electronics
US11554203B2 (en) 2017-11-01 2023-01-17 Smith & Nephew Plc Negative pressure wound treatment apparatuses and methods with integrated electronics
US11564845B2 (en) 2017-09-13 2023-01-31 Smith & Nephew Plc Negative pressure wound treatment apparatuses and methods with integrated electronics
US11564847B2 (en) 2016-09-30 2023-01-31 Smith & Nephew Plc Negative pressure wound treatment apparatuses and methods with integrated electronics
US11701265B2 (en) 2017-09-13 2023-07-18 Smith & Nephew Plc Negative pressure wound treatment apparatuses and methods with integrated electronics
US11707564B2 (en) 2017-11-01 2023-07-25 Smith & Nephew Plc Safe operation of integrated negative pressure wound treatment apparatuses
US11723809B2 (en) 2016-03-07 2023-08-15 Smith & Nephew Plc Wound treatment apparatuses and methods with negative pressure source integrated into wound dressing

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US11723809B2 (en) 2016-03-07 2023-08-15 Smith & Nephew Plc Wound treatment apparatuses and methods with negative pressure source integrated into wound dressing
US11285047B2 (en) 2016-04-26 2022-03-29 Smith & Nephew Plc Wound dressings and methods of use with integrated negative pressure source having a fluid ingress inhibition component
US11305047B2 (en) 2016-05-03 2022-04-19 Smith & Nephew Plc Systems and methods for driving negative pressure sources in negative pressure therapy systems
US11896465B2 (en) 2016-05-03 2024-02-13 Smith & Nephew Plc Negative pressure wound therapy device activation and control
US11096831B2 (en) 2016-05-03 2021-08-24 Smith & Nephew Plc Negative pressure wound therapy device activation and control
US11173240B2 (en) 2016-05-03 2021-11-16 Smith & Nephew Plc Optimizing power transfer to negative pressure sources in negative pressure therapy systems
US11116669B2 (en) 2016-08-25 2021-09-14 Smith & Nephew Plc Absorbent negative pressure wound therapy dressing
US11648152B2 (en) 2016-08-25 2023-05-16 Smith & Nephew Plc Absorbent negative pressure wound therapy dressing
US11564847B2 (en) 2016-09-30 2023-01-31 Smith & Nephew Plc Negative pressure wound treatment apparatuses and methods with integrated electronics
US11123471B2 (en) 2017-03-08 2021-09-21 Smith & Nephew Plc Negative pressure wound therapy device control in presence of fault condition
US11160915B2 (en) 2017-05-09 2021-11-02 Smith & Nephew Plc Redundant controls for negative pressure wound therapy systems
US11564845B2 (en) 2017-09-13 2023-01-31 Smith & Nephew Plc Negative pressure wound treatment apparatuses and methods with integrated electronics
US11701265B2 (en) 2017-09-13 2023-07-18 Smith & Nephew Plc Negative pressure wound treatment apparatuses and methods with integrated electronics
US11497653B2 (en) 2017-11-01 2022-11-15 Smith & Nephew Plc Negative pressure wound treatment apparatuses and methods with integrated electronics
US11554203B2 (en) 2017-11-01 2023-01-17 Smith & Nephew Plc Negative pressure wound treatment apparatuses and methods with integrated electronics
US11707564B2 (en) 2017-11-01 2023-07-25 Smith & Nephew Plc Safe operation of integrated negative pressure wound treatment apparatuses
USD999914S1 (en) 2018-09-13 2023-09-26 Smith & Nephew Plc Medical dressing
USD898925S1 (en) 2018-09-13 2020-10-13 Smith & Nephew Plc Medical dressing
WO2020139475A3 (fr) * 2018-12-26 2020-08-20 Kci Licensing, Inc. Adaptateur de pompe piézoélectrique de thérapie par pression négative

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