Interfaces, systems, and methods for use in reduced pressure tissue treatment
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A61M-001/00
A61M-027/00
출원번호
US-0955662
(2013-07-31)
등록번호
US-9623159
(2017-04-18)
발명자
/ 주소
Locke, Christopher Brian
출원인 / 주소
KCI Licensing, Inc.
인용정보
피인용 횟수 :
0인용 특허 :
86
초록▼
Systems and devices for treating a tissue site may include an interface adapted to provide a reduced pressure to a dressing. The interface may include a positive-pressure channel for delivering a positive pressure from a positive-pressure port to a positive pressure outlet. The positive-pressure cha
Systems and devices for treating a tissue site may include an interface adapted to provide a reduced pressure to a dressing. The interface may include a positive-pressure channel for delivering a positive pressure from a positive-pressure port to a positive pressure outlet. The positive-pressure channel may include a constricted portion configured to provide a pressure drop. The interface may additionally include a reduced-pressure channel adapted to deliver reduced pressure to the dressing that substantially corresponds to the pressure drop. The reduced-pressure channel may be fluidly coupled between the positive pressure channel and a side of the interface body adapted to face the dressing. Other systems and devices are disclosed.
대표청구항▼
1. An interface for providing a reduced pressure to a dressing, the interface comprising: an interface body having a first side and a second side, the second side adapted to face the dressing;an inlet formed proximate the first side of the interface body, the inlet having a positive-pressure port an
1. An interface for providing a reduced pressure to a dressing, the interface comprising: an interface body having a first side and a second side, the second side adapted to face the dressing;an inlet formed proximate the first side of the interface body, the inlet having a positive-pressure port and a pressure-sensing port;a positive-pressure channel adapted to deliver positive pressure and extending through the interface body from the positive-pressure port to a positive-pressure outlet proximate the first side of the interface body, wherein the positive-pressure channel includes a constricted portion configured to provide a pressure drop;a reduced-pressure channel adapted to deliver the reduced pressure to the dressing, the reduced-pressure channel fluidly coupled between the positive-pressure channel and the second side of the interface body, wherein the reduced pressure substantially corresponds to the pressure drop, and wherein the reduced-pressure channel is fluidly coupled to the positive-pressure channel downstream of the constricted portion and between the constricted portion and the positive-pressure outlet; anda pressure-sensing channel in fluid communication between the pressure-sensing port and the second side of the interface body. 2. The interface of claim 1, wherein the reduced-pressure channel has a longitudinal dimension extending between the positive-pressure channel and the second side of the interface body that is greater than 15 millimeters. 3. The interface of claim 1, wherein the positive-pressure channel has a longitudinal axis substantially parallel to the second side of the interface body, and wherein the reduced-pressure channel is substantially perpendicular to the positive-pressure channel. 4. The interface of claim 1, further comprising a hydrophobic filter positioned adjacent the second side of the interface body and adapted to be positioned in fluid communication between the reduced-pressure channel and the dressing. 5. The interface of claim 1, further comprising a regulating valve associated with the reduced-pressure channel that is adapted to regulate an amount of the reduced pressure being delivered to the dressing. 6. The interface of claim 1, further comprising at least one duct in fluid communication with the positive-pressure outlet, wherein the at least one duct is configured to direct flow over a drape. 7. The interface of claim 1, wherein the constricted portion has a first diameter at an upstream end and a second diameter at an opposing downstream end, the second diameter being smaller than the first diameter, and wherein the constricted portion has a slope of 30 degrees relative to a longitudinal axis of the positive-pressure channel. 8. The interface of claim 1, wherein the positive-pressure outlet is configured to vent to the atmosphere. 9. The interface of claim 1, wherein the reduced-pressure channel is fluidly coupled to the positive-pressure channel at the constricted portion. 10. The interface of claim 1, further comprising: a hydrophobic filter disposed proximate the second side of the interface body;a regulating valve associated with the reduced-pressure channel that is adapted to regulate an amount of the reduced pressure being delivered to the dressing;at least one duct associated with the positive-pressure outlet and configured to direct flow over a drape;wherein the reduced-pressure channel has a longitudinal dimension extending between the positive-pressure channel and the second side of the interface body that is greater than 15millimeters;wherein the positive-pressure channel has a longitudinal axis substantially parallel to the second side of the interface body, and wherein the reduced-pressure channel is substantially perpendicular to the positive-pressure channel;wherein the constricted portion has a slope greater than 20 degrees relative to a longitudinal axis of the positive-pressure channel;wherein the positive-pressure outlet is configured to vent to atmosphere; andwherein the positive-pressure port is fluidly isolated from the pressure-sensing port proximate the inlet. 11. A system for treating a tissue site with reduced pressure, comprising: a manifold for placing proximate the tissue site, the manifold comprising an absorbent layer for absorbing liquids from the tissue site;a flexible film drape for covering the manifold to form a sealed space containing the manifold, the flexible film drape having an aperture adapted to provide fluid communication with the sealed space;an interface adapted to be positioned over the flexible film drape;wherein the interface comprises: an interface body having a first side and a second side, the second side adapted to face the flexible film drape and to be in fluid communication with the manifold through the aperture,an inlet formed proximate the first side of the interface body, the inlet having a positive-pressure port and a pressure-sensing port, wherein the positive-pressure port is fluidly isolated from the pressure-sensing port proximate the inlet,a positive-pressure channel adapted to deliver positive pressure and extending through the interface body from the positive-pressure port to a positive-pressure outlet proximate the first side of the interface body, wherein the positive-pressure channel includes a constricted portion configured to provide a pressure drop,a reduced-pressure channel adapted to deliver a reduced pressure to the manifold, the reduced-pressure channel fluidly coupled between the positive-pressure channel and the second side of the interface body, wherein the reduced pressure substantially corresponds to the pressure drop, anda pressure-sensing channel in fluid communication between the pressure-sensing port and the second side of the interface body;a positive-pressure source fluidly coupled to the positive-pressure channel; anda pressure-sensing unit fluidly coupled to the pressure-sensing channel for measuring a pressure in the pressure-sensing channel. 12. The system of claim 11, further comprising at least one duct fluidly coupled to the positive-pressure outlet for directing positive flow over the flexible film drape. 13. The system of claim 12, wherein the at least one duct comprises a Coanda device adapted to entrain air and to increase a volume of the positive flow. 14. The system of claim 11, further comprising a controller coupled to the positive-pressure source for regulating an amount of the positive pressure delivered to the positive-pressure port. 15. The system of claim 11, wherein the reduced-pressure channel has a longitudinal dimension extending between the positive-pressure channel and the second side of the interface body that is greater than 15 millimeters. 16. The system of claim 11, wherein the positive-pressure channel has a longitudinal axis that is substantially parallel to the second side of the interface body, and wherein the reduced-pressure channel is substantially perpendicular to the positive-pressure channel. 17. The system of claim 11, further comprising a hydrophobic filter positioned adjacent the second side of the interface body and adapted to be positioned in fluid communication between the reduced-pressure channel and the manifold. 18. The system of claim 11, further comprising a regulating valve associated with the reduced pressure channel that is adapted to regulate an amount of the reduced pressure being delivered to the tissue site. 19. The system of claim 11, wherein the constricted portion has a first diameter at an upstream end and a second diameter at an opposing downstream end, the second diameter being smaller than the first diameter, and wherein the at least one constricted portion has a slope of 30degrees relative to a longitudinal axis of the positive-pressure channel. 20. The system of claim 11, wherein the positive-pressure outlet is configured to vent to the atmosphere. 21. The system of claim 11, wherein the reduced-pressure channel is fluidly coupled to the positive-pressure channel downstream of the at least one constricted portion and between the constricted portion and the positive-pressure outlet. 22. The system of claim 11, wherein the reduced-pressure channel is fluidly coupled to the positive-pressure channel at the at least one constricted portion. 23. An interface for providing a reduced pressure to a dressing, the interface comprising: an interface body having a first side and a second side, the second side adapted to face the dressing;an inlet formed proximate the first side of the interface body, the inlet having a positive-pressure port and a pressure-sensing port;a positive-pressure channel adapted to deliver positive pressure and extending through the interface body from the positive-pressure port to a positive-pressure outlet proximate the first side of the interface body, wherein the positive-pressure channel includes a constricted portion configured to provide a pressure drop;a reduced-pressure channel adapted to deliver the reduced pressure to the dressing, the reduced-pressure channel fluidly coupled between the positive-pressure channel and the second side of the interface body, wherein the reduced pressure substantially corresponds to the pressure drop, and wherein the reduced-pressure channel is fluidly coupled to the positive-pressure channel at the constricted portion; anda pressure-sensing channel in fluid communication between the pressure-sensing port and the second side of the interface body. 24. An interface for providing a reduced pressure to a dressing, the interface comprising: an interface body having a first side and a second side, the second side adapted to face the dressing;a positive-pressure channel adapted to deliver positive pressure and extending through the interface body to a positive-pressure outlet proximate the first side of the interface body, the positive-pressure channel including a constricted portion configured to provide a pressure drop; anda reduced-pressure channel fluidly coupled to the positive-pressure channel at or downstream of the constricted portion and between the positive-pressure channel and the second side of the interface body.
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