Abdominal treatment systems, delivery devices, and methods

Abstract

A reduced-pressure abdominal treatment device is presented that has a plurality of liquid-impermeable layers with a foam spacer between two of the liquid-impermeable layers. The plurality of liquid-impermeable layers have a coextensive area A1. The foam spacer has a plan-view area A2. A2 is less than 80% of A1 (i.e., A2<0.8A1). The foam spacer is configured such that, under reduced pressure, a target fluid removal zone experiences reduced-pressure vectors over an angle theta (θ) that is typically 360 degrees for a majority of locations in the target fluid removal zone. Applying 360 degrees of reduced pressure helps avoid blockage. The plurality of liquid-impermeable layers may be bonded for various effects. Other devices, systems, and methods are disclosed.

1 . An abdominal treatment device for distributing reduced pressure to a tissue site, the abdominal treatment device comprising:
 a plurality of liquid-impermeable layers, wherein the liquid-impermeable layers are at least partially fenestrated;   a micro-channel space between the liquid-impermeable layers;   a foam spacer disposed between at least two layers of the liquid-impermeable layers, wherein the foam spacer comprises mirrored c-shaped members having an outer peripheral edge and a target flow zone inboard of the outer peripheral edge; and   spacer bonds coupling at least two of the liquid-impermeable layers and disposed along the outer peripheral edge of the c-shaped members; and   wherein the micro-channel space in the target flow zone is adapted to experience reduced-pressure vectors over an angle that is at least 270 degrees.   
     
     
         2 . The abdominal treatment device of  claim 1 , wherein the mirrored c-shape members are interconnected. 
     
     
         3 . The abdominal treatment device of  claim 1 , wherein the spacer bonds comprise a stitch bond. 
     
     
         4 . The abdominal treatment device of  claim 1 , wherein the spacer bonds comprise a solid bond. 
     
     
         5 . The abdominal treatment device of  claim 1 , wherein each of the liquid-impermeable layers has a thickness in the range of 50 to 120 microns. 
     
     
         6 . The abdominal treatment device of  claim 1 , wherein:
 the mirrored c-shape members are interconnected;   the spacer bonds comprise a solid bond; and   each of the liquid-impermeable layers has a thickness in the range of 50 to 120 microns.   
     
     
         7 . An abdominal treatment device for distributing reduced pressure to a tissue site, the abdominal treatment device comprising:
 a plurality of liquid-impermeable layers, wherein the liquid-impermeable layers are at least partially fenestrated;   a micro-channel space between the liquid-impermeable layers;   a foam spacer disposed between at least two layers of the liquid-impermeable layers, wherein the foam spacer comprises a plurality of annular circles having an outer peripheral edge and a target flow zone inboard of the outer peripheral edge; and   spacer bonds coupling at least two of the liquid-impermeable layers and disposed along the outer peripheral edge of the foam spacer; and   wherein the foam spacer is configured such that the micro-channel space in the target flow zone experiences reduced-pressure vectors over an angle that is at least 270 degrees under reduced pressure.   
     
     
         8 . The abdominal treatment device of  claim 7 , wherein the annular circles are interconnected. 
     
     
         9 . The abdominal treatment device of  claim 7 , wherein the spacer bonds comprise a stitch bond. 
     
     
         10 . The abdominal treatment device of  claim 7 , wherein the spacer bonds comprise a solid bond. 
     
     
         11 . The abdominal treatment device of  claim 7 , wherein each of the liquid-impermeable layers has a thickness in the range of 50 to 120 microns. 
     
     
         12 . The abdominal treatment device of  claim 7 , wherein:
 the annular circles are interconnected;   the spacer bonds comprise a stitch bond; and   each of the liquid-impermeable layers has a thickness in the range of 50 to 120 microns.   
     
     
         13 . A system for treating an abdominal cavity with reduced pressure, the system comprising:
 an abdominal treatment device comprising:
 a plurality of liquid-impermeable layers, wherein the plurality of liquid-impermeable layers are at least partially fenestrated, 
 a micro-channel space between the liquid-impermeable layers; 
 a foam spacer disposed between at least two layers of the plurality of liquid-impermeable layers, the foam spacer and comprising a plurality of annular circles having an outer peripheral edge and a target flow zone inboard of the outer peripheral edge, and 
 spacer bonds coupling at least two of the liquid-impermeable layers and disposed along the outer peripheral edge of the foam spacer, 
 wherein the foam spacer is configured so that the micro-channel space experiences reduced-pressure vectors over an angle that is at least 270 degrees under reduced pressure; and 
   a reduced-pressure source fluidly coupled to the abdominal treatment device.   
     
     
         14 . The system of  claim 13 , wherein the annular circles are interconnected. 
     
     
         15 . The system of  claim 13 , wherein the spacer bonds comprise a stitch bond. 
     
     
         16 . The system of  claim 13 , wherein the spacer bonds comprise a solid bond. 
     
     
         17 . The system of  claim 13 , wherein each of the liquid-impermeable layers has a thickness in the range of 50 to 120 microns. 
     
     
         18 .- 20 . (canceled)