Reduced-pressure systems, devices, and methods for treating a tissue site that includes a fistula

1. A fistula-isolating device for isolating a fistula in a wound bed undergoing reduced-pressure treatment, the fistula-isolating device configured to be positioned within a distribution manifold and comprising:

a first flange member having a first aperture;

a second flange member having a second aperture;

an adjustable passageway member coupled to the first flange member and to the second flange member, the adjustable passageway member having a passageway substantially aligned with the first aperture of the first flange member and the second aperture of the second flange member;

wherein the adjustable passageway member is variably moveable between a retracted position in which the adjustable passageway member has a length L R and an extended position in which the adjustable passageway member has a length L E and wherein L E >3L R ;

wherein the adjustable passageway member is substantially fluid impermeable;

and

a perimeter member positioned substantially around an exterior perimeter of the adjustable passageway member between the first flange member and the second flange member.

2. The device of claim 1 , wherein the adjustable passageway member comprises an annular wall having bellows.

3. The device of claim 1 , wherein the adjustable passageway member comprises an annular wall having collapsible folds.

4. The device of claim 1 , wherein when in the extended position, the adjustable passageway member has a length L E that is six times greater than the retracted position (L E >6L R ).

5. The device of claim 1 , wherein when in the extended position, the adjustable passageway member has a length L E that is ten times greater than the retracted position (L E >10L R ).

6. The device of claim 1 , further comprising an ostomy-appliance interface formed on the first flange member.

7. The device of claim 1 , wherein the perimeter member is fluid permeable.

8. A system for providing reduced pressure treatment to a wound bed that includes a fistula, the system comprising:

a fistula-isolating device for isolating the fistula in the wound bed undergoing reduced-pressure treatment, the fistula-isolating device comprising:

a first flange member having a first aperture,

a second flange member having a second aperture,

an adjustable passageway member coupled to the first flange member and to the second flange member, the adjustable passageway member having a passageway substantially aligned with the first aperture of the first flange member and the second aperture of the second flange member,

wherein the adjustable passageway member is variably moveable between a retracted position in which the adjustable passageway member has a length L R and an extended position in which the adjustable passageway has a length L E and wherein L E >3L R ,

wherein the adjustable passageway member is substantially fluid impermeable,

and

a perimeter member positioned substantially around an exterior perimeter of the adjustable passageway member between the first flange member and the second flange member;

a distribution manifold having a fistula aperture for receiving the fistula-isolating device;

a sealing member for covering the fistula-isolating device and the distribution manifold to create a sealed space over at least a portion of the wound bed, wherein the sealing member has an ostomy-interface aperture fluidly coupled to the adjustable passageway;

a reduced-pressure source for supplying a reduced pressure;

a reduced-pressure interface fluidly coupled to the distribution manifold;

a reduced-pressure delivery conduit fluidly coupled to the reduced-pressure source and to the reduced-pressure interface; and

an ostomy appliance fluidly coupled to the first aperture on the first flange member of the fistula-isolating device.

9. The device of claim 8 , wherein the fistula-isolating device further comprises an ostomy-appliance interface coupled to the first flange member.

10. The system of claim 8 , wherein the distribution manifold has an initial height h d1 when not subjected to reduced pressure, wherein the fistula-isolating device has an initial height h F1 when not subjected to reduced pressure, and wherein h d1 is substantially equal to h F1 .

11. The system of claim 8 , wherein

the distribution manifold has an initial height h d1 when not subjected to reduced pressure;

the fistula-isolating device has an initial height h F1 when not subjected to reduced pressure and h d1 is substantially equal to h F1 ;

the distribution manifold has a height h d2 when the sealed space is subjected to reduced pressure in a first therapeutic pressure range;

the fistula-isolating device has a height h F2 when the sealed space is subjected to reduced pressure at the first therapeutic pressure and the sealing member delivers a force to the first flange member, and wherein h d2 is substantially equal to h F2 .

12. The system of claim 8 , wherein the adjustable passageway member comprises an annular wall member having a thickness less than 1 millimeter.

13. The system of claim 8 , wherein the perimeter member comprises a first material and distribution manifold comprises the first material.

14. The device of claim 8 , wherein the adjustable passageway member comprises an annular wall having bellows.

15. The device of claim 8 , wherein the adjustable passageway member comprises an annular wall having collapsible folds.

16. The device of claim 8 , wherein when in the extended position, the adjustable passageway member has a length L E that is six times greater than the retracted position (L E >6L R ).

17. The device of claim 8 , wherein when in the extended position, the adjustable passageway member has a length L E that is ten times greater than the retracted position (L E >10L R ).

18. The device of claim 8 , wherein the perimeter member is fluid permeable.