Devices and methods for application of reduced pressure therapy

Patent metadata

Field	Value
Publication number	US-10117977-B2
Application number	US-4773908-A
Country	US
Kind code	B2
Filing date	Mar 13, 2008
Priority date	Mar 14, 2007
Publication date	Nov 6, 2018
Grant date	Nov 6, 2018

Abstract

The tissue therapy device includes a sealant layer and a suction apparatus. The sealant layer creates a sealed enclosure between it and the surface of a patient by forming an airtight seal around an area of tissue. The suction apparatus is in fluid communication with the sealant layer and together, create a closed, reduced pressure therapy system. The suction apparatus self-creates reduced pressure by decreasing the density of air molecules underneath the sealant layer by expanding the volume of the air molecules.

First claim

What is claimed is:

1. A tissue therapy device, the device comprising:
a sealant layer comprising:
a base member comprising an aperture, and
a cap member configured to removably seal the aperture of the base member, wherein the base member and the cap member farm a sealed enclosure around an area of tissue; and

a suction apparatus comprising:
a body with a variable volume portion bounded by a rigid wall portion,
a slidable sealing member configured to sealably slide along the rigid wall portion, and
a retaining mechanism configured to hold the slidable sealing member in a withdrawn position within the rigid wall portion to create and maintain a negative pressure within the sealed enclosure, wherein the retaining mechanism comprises an elongated structure with a distal portion attached to the slidable sealing member and a proximal portion configured to movably engage projections of the suction apparatus.

2. The device of claim 1 , wherein the suction apparatus is configured to expand a volume of air located in a joint volume of space shared between the sealed enclosure and the suction apparatus.

3. The device of claim 1 , wherein the suction apparatus is configured to create a level of reduced pressure underneath the sealant layer that is between about 0 and about 760 mm Hg.

4. The device of claim 1 , wherein the device is further configured to maintain a level of reduced pressure that is between about 0 nun Hg and about 760 mm Hg.

5. The device of claim 1 , wherein the retaining mechanism is a ratcheting mechanism.

6. The device of claim 1 , wherein the suction apparatus further comprises a collection chamber.

7. The device of claim 1 , wherein the device further comprises an external collection chamber.

8. The device of claim 1 , wherein the device further comprises a second suction apparatus.

9. The device of claim 1 , wherein the suction apparatus and the sealant layer are integrated into a single structure.

10. The device of claim 1 , wherein the suction apparatus is configured to be disconnected from and reconnected to the sealant layer without disturbing the sealant layer.

11. The device of claim 1 , wherein the device further comprises a second suction apparatus, and wherein the second suction apparatus is configured to be connected to the sealant layer.

12. The device of claim 1 , wherein the suction apparatus comprises a one-way flow valve, and wherein the one-way flow valve is configured to prevent fluid from returning to a section of tissue requiring therapy.

13. The device of claim 1 , wherein the device further comprises a safety valve.

14. The device of claim 1 , wherein the device further comprises a securing member configured to attach the suction apparatus to a patient.

15. The device of claim 1 , wherein the device further comprises a contact layer.

16. The device of claim 15 , wherein the contact layer is a stacked mesh matrix.

17. The device of claim 15 , wherein at least two of the suction apparatus, the contact layer, and the sealant layer are integrated together while a third is a separate structure.

18. The device of claim 1 , wherein the device further comprises a protective layer placed around the area of tissue to be treated.

19. The device of claim 15 , wherein the contact layer comprises a pouch containing a plurality of contact structures.

20. A tissue therapy device, the device comprising:
a sealant layer comprising:
a base member comprising an aperture, and
a cap member configured to removably seal the aperture of the base member, wherein the base member and the cap member form a sealed enclosure around an area of tissue; and

a non-electrically powered suction apparatus comprising:
a non-cylindrical variable volume portion bounded by a rigid wall portion,
a slidable sealing member configured to sealably slide along the rigid wall portion, and
a retaining mechanism configured to hold the slidable sealing member in a withdrawn position within the rigid wall portion to create and maintain a negative pressure underneath the sealant layer, wherein the retaining mechanism comprises an elongated structure with a distal portion attached to the slidable sealing member and a proximal portion configured to movably engage projections of the suction apparatus.

21. The device of claim 1 , wherein the projections of the suction apparatus comprise a plurality of teeth oriented longitudinally along a length of the suction apparatus.

22. The device of claim 21 , wherein the plurality of teeth are externally exposed on the suction apparatus.

23. The device of claim 1 , wherein the suction apparatus further comprises a handle attached to the retaining mechanism.

24. The device of claim 1 , wherein the retaining mechanism comprises a proximal loop structure.

25. The device of claim 1 , wherein the suction apparatus further comprises a proximal handle directly attached to the retaining mechanism.

26. The device of claim 25 , wherein the device further comprises a distal handle directly attached to the suction apparatus at a location distal to a proximal end of the suction apparatus.

27. The device of claim 1 , wherein the proximal portion of the elongated structure comprises a plurality of fixed teeth.

28. The device of claim 26 , wherein a plurality of fixed teeth are configured longitudinally along the proximal end of the suction apparatus.

29. The device of claim 1 , wherein the base member forms a complementary interfit with the cap member.

30. The device of claim 29 , wherein the complementary interfit comprises complementary threads on the base member and the cap member.

31. The device of claim 29 , wherein the complementary interfit is a snapfit.

32. The device of claim 20 , wherein the base member forms a complementary interfit with the cap member.

33. The device of claim 32 , wherein the complementary interfit comprises complementary threads on the base member and the cap member.

34. The device of claim 32 , wherein the complementary interfit is a snapfit.

35. The device of claim 1 , wherein the variable volume portion is in fluid communication with the sealed enclosure through the cap member.

36. The device of claim 1 , wherein the base member comprises a suction aperture configured to attach to the suction apparatus.

37. The device of claim 1 , wherein the cap member comprises a suction aperture configured to attach to the suction apparatus.

38. The device of claim 1 , wherein the base member comprises a stabilizing member configured to stabilize the base member when the cap member is being removed from the resealable aperture of the base member.

39. The device of claim 1 , wherein at least one of the cap member or the base member comprises a gasket configured to facilitate an airtight seal.

40. The device of claim 1 , wherein the cap member comprises a contact layer configured to contact the sealed enclosure when the cap member seals the resealable aperture.

41. A tissue therapy device, the device comprising:
a sealant layer comprising:
a base member comprising a resealable aperture, and
a cap member configured to removably seal the aperture of the base

Assignees

• Pinto Moshe
• Hu Dean
• Fong Kenton
• Univ Leland Stanford Junior

Inventors

• Pinto Moshe
• Hu Dean
• Fong Kenton

Classifications

• A61F2013/00536

  for draining or irrigating wounds · CPC title

• A61F2013/00174

  possibility of applying pressure · CPC title

• A61F2013/0054

  for deep wounds · CPC title

• A61F2013/00412

  for use with needles, tubes or catheters · CPC title

• A61F13/069

  Decubitus ulcer bandages · CPC title