Abdominal treatment systems, delivery devices, and methods
View Patent ↗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 A 1 . The foam spacer has a plan-view area A 2 . A 2 is less than 80% of A 1 (i.e., A 2 <0.8A 1 ). 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 the liquid-impermeable layers, wherein the foam spacer comprises arc members interconnected to form at least one window; and
spacer bonds coupling at least two of the liquid-impermeable layers and disposed along a peripheral edge of the window;
wherein the liquid-impermeable layers have a coextensive area A 1 ;
wherein the foam spacer has a plan-view area A 2 ;
wherein A 2 is less than 80% of A 1 ; and
wherein the foam spacer is configured such that, under reduced pressure, a location in the micro-channel space experiences reduced-pressure vectors over an angle theta (θ) that is at least 300 degrees.
2. The abdominal treatment device of claim 1 , wherein the angle theta (θ) is 360 degrees for more than 70 percent (70%) of locations in the micro-channel space.
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 arc members are elliptical members.
5. 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 has have a coextensive area A 1 and are 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 having a plan-view area A 2 and comprising arc members interconnected to form at least one window, and
spacer bonds coupling the two layers of the plurality of liquid impermeable layers and disposed along a peripheral edge of the window,
wherein A 2 is less than 80% of A 1 , and
wherein the foam spacer is configured such that, under reduced pressure, a location in the micro-channel space experiences reduced-pressure vectors over an angle theta (θ) that is at least 300 degrees;
a reduced-pressure source fluidly coupled to the abdominal treatment device.
6. The system of claim 5 , wherein the angle theta (θ) is 360 degrees for more than 70 percent of locations in the micro-channel space.
7. The system of claim 5 , further comprising a reduced-pressure conduit and a reduced-pressure connector subsystem for fluidly coupling the reduced-pressure source to the abdominal treatment device.
8. The system of claim 5 , wherein the spacer bonds comprise a solid bond.
9. The system of claim 5 , wherein the arc members are elliptical members.
10. The system of claim 5 , wherein the arc members are concentric circular members.
11. A method of manufacturing an abdominal treatment device, the method comprising the steps of:
providing a plurality of liquid-impermeable layers that are fenestrated;
placing the plurality of liquid-impermeable layers adjacent one another, wherein the plurality of liquid-impermeable layers has have a coextensive area A 1 ;
disposing a foam spacer between at least two layers of the plurality of liquid-impermeable layers, the foam spacer comprising arc members interconnected to form at least one window;
bonding at least two of the liquid-impermeable layers along a peripheral edge of the window to form a micro-channel space between the liquid-impermeable layers;
wherein the foam spacer has a plan-view area A 2 and A 2 is less than 80% of A 1 ;
wherein the foam spacer is configured such that, under reduced pressure, a location in the micro-channel space experiences reduced-pressure vectors over an angle theta (θ) that is 3-60 at least 300 degrees.
12. The method of manufacturing an abdominal treatment device of claim 11 , wherein the angle theta (θ) is 360 degrees for more than 70 percent of locations in the micro-channel space.
13. The method of manufacturing an abdominal treatment device of claim 11 , wherein the arc members are elliptical members.
14. A method of treating a tissue site in an abdominal cavity, the method comprising the steps of:
opening the abdominal cavity;
deploying within the abdominal cavity an abdominal treatment delivery device;
deploying a reduced-pressure connector subsystem;
deploying a sealing member to form a fluid seal over the abdominal cavity;
fluidly coupling the reduced-pressure connector subsystem to a reduced-pressure source;
activating the reduced-pressure source; and
wherein the abdominal treatment delivery device comprises:
a plurality of liquid-impermeable layers, wherein the plurality of liquid-impermeable layers has have a coextensive area A 1 and are 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 having a plan-view area A 2 and comprising arc members interconnected to form at least one window; and
spacer bonds disposed between the two layers of the plurality of liquid impermeable layers along a peripheral edge of the window;
wherein A 2 is less than 80% of A 1 ;
wherein the foam spacer is configured such that, under reduced pressure, a location in the micro-channel space experiences reduced-pressure vectors over an angle theta (θ) that is at least 300 degrees.