US2010160901A1PendingUtilityA1

Device for delivery of reduced pressure to body surfaces

57
Assignee: HU DEANPriority: Nov 25, 2008Filed: Dec 23, 2009Published: Jun 24, 2010
Est. expiryNov 25, 2028(~2.4 yrs left)· nominal 20-yr term from priority
Inventors:Dean HuKenton FongMoshe PintoPhilip HuiKenneth WuCraig McgreevyEvan Anderson
A61M 2205/6081A61M 2205/0227G01L 7/086G01L 9/10A61F 13/0213A61F 13/0253A61F 13/0223A61F 13/00051A61F 13/022A61F 13/0256A61M 2205/583A61F 2013/00412A61M 1/912A61M 1/966A61M 1/915A61M 1/732A61F 13/05A61F 5/44A61F 5/442
57
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Claims

Abstract

Disclosed herein is a device which is intended to deliver and maintain reduced pressure to body surfaces for application of reduced pressure wound therapy (RPWT) also known as negative pressure wound therapy (NPWT). During application of this type of therapy, a substantially airtight seal is formed around a section of tissue to be treated. This seal is formed by a dressing which provides fluid communication from a section of tissue to a reduced pressure source. Disclosed herein is a dressing system which is configured to enhance usability and functionality of this dressing. First, the system may be configured to allow full rotation of the fluid communication conduit to the reduced pressure source along the axis substantially normal to the dressing. Second, the system may be configured to include a one-way valve to prevent backflow of any drainage fluids. Third, the system may be configured with transparent windows covered by opaque flaps to allow inspection through the dressing. Fourth, the system may be configured to include an indicator which visually makes clear whether reduced pressure is being applied or not. Fifth, the system is configured to minimize the profile of the dressing system.

Claims

exact text as granted — not AI-modified
1 . A reduced pressure treatment system, comprising:
 a cover structure comprising an outer edge, an upper surface, a lower surface, and at least one opening;   a port member attached to the upper surface of the cover structure and comprising at least one port lumen in communication with the at least one opening of the cover structure; and   a hydrocolloid layer attached to the lower surface of the cover structure, wherein the hydrocolloid layer has a thickness of at least about 0.2 mm.   
     
     
         2 . The reduced pressure treatment system of  claim 1 , wherein the hydrocolloid layer comprises a reduced thickness region about the outer edge of the cover structure. 
     
     
         3 . The reduced pressure treatment system of  claim 1 , wherein the reduced thickness region comprises an embossed or compressed region. 
     
     
         4 . The reduced pressure treatment system of  claim 1 , wherein the reduced thickness region comprises an increased density relative to an interior region of the hydrocolloid layer. 
     
     
         5 . The reduced pressure treatment system of  claim 1 , further comprising visual grid markings on the cover structure. 
     
     
         6 . The reduced pressure treatment system of  claim 1 , wherein the port member further comprises a base and a body configured to rotate with respect to the base. 
     
     
         7 . The reduced pressure treatment system of  claim 1 , wherein the base of the port member is adhered to the upper surface of the cover structure. 
     
     
         8 . The reduced pressure treatment system of  claim 1 , further comprising tubing, the tubing comprising an outer wall, a proximal end, a distal end, at least one lumen therebetween, a longitudinal lumen axis, a first dimension transverse to the longitudinal lumen axis and a second dimension transverse to the first dimension and the longitudinal lumen axis. 
     
     
         9 . The reduced pressure treatment system of  claim 8 , wherein the tubing is configured to attach to the port member. 
     
     
         10 . The reduced pressure treatment system of  claim 8 , wherein the tubing is integrally formed with the port member. 
     
     
         11 . The reduced pressure treatment system of  claim 8 , wherein the first dimension is greater in size than the second dimension. 
     
     
         12 . The reduced pressure treatment system of  claim 8 , wherein the first dimension is at least twice the size of than the second dimension. 
     
     
         13 . The reduced pressure treatment system of  claim 8 , wherein the first dimension is at least three times the size than the second dimension. 
     
     
         14 . The reduced pressure treatment system of  claim 8 , wherein the first dimension is at least four times the size than the second dimension. 
     
     
         15 . The reduced pressure treatment system of  claim 8 , the tubing comprises a plurality of lumens in a generally planar configuration. 
     
     
         16 . The reduced pressure treatment system of  claim 1 , wherein the at least one port lumen has a non-circular cross-sectional configuration. 
     
     
         17 . The reduced pressure treatment system of  claim 16 , wherein the at least one port lumen further comprises at least one lumen projection. 
     
     
         18 . The reduced pressure treatment system of  claim 17 , wherein the at least one lumen projection comprises a plurality of longitudinal ridges. 
     
     
         19 . The reduced pressure treatment system of  claim 8 , wherein the tubing further comprises at least one side passageway providing communication between at least one lumen of the tubing and the outer wall. 
     
     
         20 . The reduced pressure treatment system of  claim 19 , further comprising an elastomeric structure sealed to the outer surface of the tubing and covering the at least one side passageway. 
     
     
         21 . The reduced pressure treatment system of  claim 20 , wherein the elastomeric structure is a sleeve structure. 
     
     
         22 . The reduced pressure treatment system of  claim 21 , wherein the elastomeric structure is configured with an interior surface that is spaced a first distance from the outer wall of the tubing when the interior surface is exposed to atmospheric pressure and a second distance less than the first distance when the interior surface is exposed to a reduced pressure. 
     
     
         23 . The reduced pressure treatment system of  claim 1 , wherein the port member comprises an elastomeric material. 
     
     
         24 . The reduced pressure treatment system of  claim 23 , wherein at least a portion of the elastomeric material is configured to deform into the at least one port lumen when an internal pressure level within the at least one port lumen is at least −50 mmHg lower than atmospheric pressure. 
     
     
         25 . The reduced pressure treatment system of  claim 1 , wherein the cover structure further comprises a reinforcement structure. 
     
     
         26 . The reduced pressure treatment system of  claim 25 , wherein the reinforcement structure is integrally formed with the cover structure. 
     
     
         27 . The reduced pressure treatment system of  claim 26 , wherein the reinforcement structure comprises a first ridge structure on the upper surface of the cover structure and surrounding the port member. 
     
     
         28 . The reduced pressure treatment system of  claim 27 , further comprising a second ridge structure surrounding the first ridge structure. 
     
     
         29 . The reduced pressure treatment system of  claim 27 , wherein the first ridge structure is a segmented ridge structure. 
     
     
         30 . The reduced pressure treatment system of  claim 25 , wherein the reinforcement structure is embedded within cover structure. 
     
     
         31 . The reduced pressure treatment system of  claim 25 , wherein the cover structure comprises a cover material and the reinforcement structure comprises a reinforcement material with an increased durometer than the cover material. 
     
     
         32 . The reduced pressure treatment system of  claim 1 , wherein the reinforcement structure comprises a grid reinforcement structure. 
     
     
         33 . The reduced pressure treatment system of  claim 1 , wherein the reinforcement structure comprises a radial spoke structure. 
     
     
         34 . The reduced pressure treatment system of  claim 1 , further comprising a release layer releasably adhered to at least a portion of the hydrocolloid layer. 
     
     
         35 . The reduced pressure treatment system of  claim 34 , wherein the release layer is releasably adhered to a central portion of the hydrocolloid layer. 
     
     
         36 . The reduced pressure treatment system of  claim 35 , further comprising at least one handle layer releasably adhered to at least a peripheral portion of the hydrocolloid layer and located between the hydrocolloid layer and the release layer. 
     
     
         37 . The reduced pressure treatment system of  claim 34 , further comprising an adhesive carrier structure detachably attached to the upper surface of the cover structure. 
     
     
         38 . The reduced pressure treatment system of  claim 37 , wherein the adhesive carrier structure comprises a first carrier layer and a second carrier layer and a non-linear interface therebetween. 
     
     
         39 . The reduced pressure treatment system of  claim 37 , wherein the adhesive carrier comprises a central opening surrounding the port member. 
     
     
         40 . The reduced pressure treatment system of  claim 37 , wherein the central opening is spaced apart from the port member. 
     
     
         41 . The reduced pressure treatment system of  claim 40 , wherein the central opening is spaced at least 1 cm from the port member. 
     
     
         42 . The reduced pressure treatment system of  claim 1 , wherein the hydrocolloid layer has a greater probe tack force about the outer edge of the cover structure than about an interior region of the cover structure. 
     
     
         43 . The reduced pressure treatment system of  claim 1 , wherein the hydrocolloid layer has a greater release force about the outer edge of the cover structure than about an interior region of the cover structure. 
     
     
         44 . The reduced pressure treatment system of  claim 1 , wherein the maximum perpendicular dimension of the port member to the cover structure is less than the maximum transverse dimension of the port member that is transverse to the maximum perpendicular dimension. 
     
     
         45 . The reduced pressure treatment system of  claim 1 , wherein the maximum perpendicular dimension of the port member to the cover structure is at least 50% less than the maximum transverse dimension of the port member that is transverse to the maximum perpendicular dimension. 
     
     
         46 . The reduced pressure treatment system of  claim 8 , wherein the tubing further comprises a one-way check valve.

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