Inflatable retractor

• US 20080081951A1
• Filed: 09/29/2006
• Published: 04/03/2008
• Est. Priority Date: 09/29/2006
• Status: Abandoned Application

• Current Assignee: Depuy Spine Incorporated (Johnson & Johnson)
• Original Assignee: Depuy Spine Incorporated (Johnson & Johnson)
• Inventors: Brideau, Holly R., Slivka, Michael, Dziedzic, Sara, Selover, Sean, Pavento, Nicholas, Beardsley, Timothy, Frasier, William J., Marchek, Connie P., Roveda, James, Bartish, Charles M.
• Application Number:
  US11/540,781
• Publication Number:
  US 20080081951A1
• Time in Patent Office: Days
• US Class Current: 600/207
• CPC Class Codes: A61B 1/32 Devices for opening or enlarging the visual field, e.g. of a tube of the body dilators A61M29/00
• CPC Class Codes: A61B 17/0218 for minimally invasive surgery A61B17/0281, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence

Abstract

The present invention provides an inflatable retractor for providing access to a surgical site, such as a patient'"'"'s spine, during a surgical process. When used in spinal surgery, the inflatable retractor allows a surgeon to operate on one or more spinal levels. The inflatable retractor includes an inflatable body defining a central cavity, wherein the body is flaccid in a non-inflated state and increasingly rigid in an inflated state. The inflatable retractor is inserted into an incision in a deflated, or partially inflated, state and then inflated once the retractor is in position. The inflation of the retractor retracts skin and muscle from the surgical site, allowing adequate visualization of the surgical site and forms a passage providing access for implants and surgical instruments to pass through the retractor and into the surgical site.

Claims

1. An inflatable retractor for retracting tissues in an incision for a surgical site, comprising:

an inflatable body defining a cavity, wherein the body is flaccid in a non-inflated state and increasingly rigid in an inflated state.

2. The inflatable retractor of claim 1, wherein the cavity provides a passage for accessing a patient.

3. The inflatable retractor of claim 1, wherein the inflatable body is formed of a biocompatible material.

4. The inflatable retractor of claim 1, wherein the inflatable body comprises one or more inflatable chambers.

5. The inflatable retractor of claim 1, further comprising a valve functional to maintain an inflating pressure in the inflatable body.

6. The inflatable retractor of claim 1, further comprising an illuminant coupled to the inflatable body for illuminating the surgical site.

7. The inflatable retractor of claims 1, further comprising a therapeutic agent coating on the inflatable body.

8. The inflatable retractor of claim 1, wherein the inflatable body is cylindrical in shape.

9. The inflatable retractor of claim 1, wherein the inflatable body is conical in shape.

10. The inflatable retractor of claim 1, wherein the inflatable body is helical in shape and configured to be coiled upon itself to define a passage for accessing a patient.

11. The inflatable retractor of claim 1, wherein the inflatable body is shaped like a finger.

12. The inflatable retractor of claim 1 further comprising a support structure for maintaining the shape of the inflatable body.

13. The inflatable retractor of claim 12, wherein the support structure is formed of a shape memory material.

14. The inflatable retractor of claim 1 further comprising an anchor attached to the inflatable body for anchoring the inflatable body to a body part within the incision.

15. The inflatable retractor of claim 1 wherein the surgical site comprises a patient'"'"'s spine.

16. The inflatable retractor of claim 1 wherein the inflatable body comprises a puncture resistant material.

17. A method of accessing a surgical site in a patient comprising the steps of:

creating an incision in the patient,

inserting an inflatable retractor into the incision in the patient, the inflatable retractor comprising an inflatable body defining a central cavity, wherein the body is flaccid in a non-inflated state and increasingly rigid in an inflated state; and

inflating the inflatable retractor to retract tissue surrounding the incision.

18. The method of claim 17, further comprising the step of preparing the incision prior to inserting the inflatable retractor.

19. The method of claim 18, wherein the step of preparing the incision comprises the steps of:

inserting a guide into the incision; and

sweeping back muscle and tissue from the surgical site; and

finding a target for attaching an inflatable retractor.

20. The method of claim 17, wherein the step of inserting the inflatable retractor comprises using an instrument to insert the inflatable retractor into the incision.

21. The method of claim 17, wherein the step of inserting the inflatable retractor comprises using a finger to insert the inflatable retractor into the incision.

22. The method of claim 17, wherein the step of inserting the inflatable retractor is assisted by the use of radiopaque markers in the retractor.

23. The method claim 17, further comprising attaching the inflatable retractor to a target.

24. The method of claim 17, wherein the step of inserting the inflatable retractor comprises the steps of:

inserting a hollow insertion cannula in the incision;

passing an inflatable retractor through the hollow insertion cannula;

attaching the inflatable retractor to a target; and

removing the hollow insertion cannula.

25. The method of claim 17, wherein the step of inserting the inflatable retractor comprises the steps of:

inserting a guide-wire in the incision;

inserting the inflatable retractor over the guide-wire; and

removing the guide-wire

26. The method of claim 17 further comprising the steps of:

deflating the inflatable retractor; and

removing the inflatable retractor from the incision.

27. The method of claim 17, further comprising the steps of inserting a access device over the inflated retractor.

28. The method of claim 17 wherein the retractor is inflated with a gas.

29. The method of claim 17 wherein the retractor is inflated with a liquid.

30. The method of claim 17 wherein the retractor is inflated with a hardening agent.

31. The method of claim 17 further comprising applying a hardening agent to the inflated retractor.

32. A system for retracting tissues in an incision for a surgical site, the system comprising:

an insertion tool for insertion into the incision at a surgical site; and

inflatable retractor configured to be guided to a surgical site by the insertion tool, the inflatable retractor comprising an inflatable body defining a central cavity, wherein the body is flaccid in a non-inflated state and increasingly rigid in an inflated state

33. The system of claim 32, wherein the insertion tool comprises a guide-wire and the inflatable retractor is guided to the surgical site over the guide-wire.

34. The system of claim 32, wherein the insertion tool comprises a cannula and the inflatable retractor is guided to the surgical site through the cannula.

35. The system of claim 32, further comprising an access device configured for insertion over the inflatable retractor.

36. The system of claim 35, wherein the access device is a rigid port.

37. The system of claim 35, wherein the access device is a retractor.