OVERTUBES FOR EUS FNA DRAINAGE

• US 20120150070A1
• Filed: 11/30/2011
• Published: 06/14/2012
• Est. Priority Date: 12/09/2010
• Status: Abandoned Application

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Ryan, Shawn, HOLLETT, Andrew, LEVENDUSKY, Joseph A.
• Application Number:
  US13/308,161
• Publication Number:
  US 20120150070A1
• Time in Patent Office: Days
• US Class Current: 600/567
• CPC Class Codes: A61B 10/0283 with vacuum aspiration, e.g. caused by retractable plunger or by connected syringe A61B10/025, A61B10/0266 take precedence
• CPC Class Codes: A61B 2010/045 Needles pointed biopsy devices with vacuum aspiration A61B10/0283
• CPC Class Codes: A61B 2017/00986 Malecots, e.g. slotted tubes, of which the distal end is pulled to deflect side struts
• CPC Class Codes: A61B 2017/3413 guided by ultrasound
• CPC Class Codes: A61B 2017/3486 Balloon
• CPC Class Codes: A61B 2017/3488 Fixation to inner organ or inner body tissue
• CPC Class Codes: A61M 25/04 in the body, e.g. expansible A61M25/10, A61M16/0488 take precedence

Abstract

A device for performing multiple medical procedures comprises a needle extending from a proximal end which remains external to a body during use to a sharpened distal end configured for insertion to a target site within a body via a body lumen. A sheath is slidably receivable over the needle, the sheath extending from a proximal end which remains external to the body during use to a distal end. A stent is slidably received over the sheath, the stent including an anchoring mechanism configured for anchoring in a desired position within the body lumen.

Claims

1. A device for performing multiple medical procedures, comprising:

a needle extending from a proximal end which remains external to a body during use to a sharpened distal end configured for insertion to a target site within a body via a body lumen;

a sheath slidably receivable over the needle, the sheath extending from a proximal end which remains external to the body during use to a distal end; and

a stent slidably received over the sheath, the stent including an anchoring mechanism configured for anchoring in a desired position within the body lumen.

2. The device of claim 1, wherein the anchoring mechanism is formed as one of a projection jutting radially outward from an overtube of the stent, a braided metal wire, a woven metal wire, a coated metal wire and an inflatable balloon, the overtube being provided over at least a portion of the sheath.

3. The device of claim 2, wherein the projections are formed as cut-out flaps from an outer wall of the stent.

4. The device of claim 1, further comprising a substantially cylindrical push tube configured and dimensioned to advance the stent distally over the sheath, the push tube having a proximal end which remains external to the body during use and a distal face configured to apply a distally directed force to the stent.

5. The device of claim 1, further comprising a capture tube provided over the stent, the capture tube configured and dimensioned to apply a radially compressive force to the stent to encase the anchoring mechanism therewithin, proximal movement of the capture tube relative to the anchoring mechanism permitting radial expansion of the anchoring mechanism.

6. The device of claim 1, wherein the stent is configured and dimensioned to be coaxially slidable over the sheath.

7. The device of claim 2, wherein the overtube is coaxially slidable over the sheath.

8. The device of claim 7, wherein the overtube comprises an inflation lumen, the inflation lumen being open to the anchoring mechanism, wherein the anchoring mechanism is an inflatable balloon.

9. The device of claim 7, wherein the overtube comprises a slot extending through a distal portion thereof, the slot defining a weakened point of the overtube, which, when subjected to an axially compressive force of a predetermined magnitude, causes radial expansion of the overtube.

10. The device of claim 7, wherein the stent comprises a curled biased configuration and wherein proximal retraction of the overtube from the stent causes movement of the stent to the biased configuration.

11. The device of claim 7, further comprising a radio-frequency contact electrode provided on a distal portion of the overtube, the electrode aiding in insertion of the overtube into the body lumen by one of cutting and cauterizing adjacent portions of tissue during insertion.

12. The device of claim 1, wherein the stent comprises a drainage port provided on a distal portion of the stent.

13. The device of claim 1, wherein a distal portion of the stent is tapered to aid in insertion into the body.

14. A device for performing fine-needle aspiration, comprising:

a needle extending from a proximal end which remains external to a body during use to a sharpened distal end configured for insertion to a target site within a body via a body lumen;

a sheath slidably receivable over the needle, the sheath extending from a proximal end which remains external to the body during use to a distal end; and

an anchoring mechanism slidably received over the sheath, the anchoring mechanism including an anchoring element at a distal end thereof to anchor the needle in a desired position within the body lumen to act as a guide over which a therapeutic instrument may be advanced to treat tissue adjacent to the target site.

15. The device of claim 14, wherein the anchoring mechanism is a stent.

16. The device of claim 15, wherein the stent further comprises an overtube coaxially slidable over the sheath.

17. The device of claim 16, wherein anchoring mechanism is formed as one of a projection jutting radially outward from the overtube, a braided metal wire, a woven metal wire, a coated metal wire and an inflatable balloon.

18. A method for inserting a diagnostic instrument into a living body, comprising:

inserting a flexible needle through a body lumen into target portion of tissue within a living body to obtain a sample of target tissue;

inserting a sheath coaxially over the needle along a path created by the needle, the sheath having a proximal end which remains external to the body and a distal end having an opening to permit slidable movement of the needle distally therefrom; and

deploying a therapeutic device from a distal portion of the sheath to treat tissue adjacent to the target tissue.

19. The method of claim 18, wherein the medical device includes a stent configured and dimensioned to anchor a distal portion of the needle at a target position.

20. The method of claim 19, wherein the stent is received on a distal portion of the sheath.

21. The method of claim 19, further comprising the step of advancing a push tube distally over the sheath to move the stent to a desired position at a distal end of the sheath.

22. The method of claim 19, wherein the stent is encased within a protective overtube, the method further comprising the step of:

retracting the overtube proximally to expose the stent to surrounding tissue, retraction of the overtube permitting the stent to move under a natural biased to a radially expanded configuration.

23. The method of claim 22, wherein the needle and sheath are retracted simultaneously with the overtube.

24. The method of claim 18, further comprising the steps of:

advancing an overtube over the sheath, the overtube having an inflation lumen extending therethrough and open to an inflatable balloon at a distal end thereof; and

inflating the inflatable balloon after the overtube has been advanced to a target position.

25. The method of claim 18, further comprising the step of:

advancing an overtube over the sheath, the overtube having a plurality of circumferentially aligned slots extending therethrough; and

actuating the overtube to cause a radial expansion of the slots, the radial expansion anchoring the overtube at a target position in the body.

26. The method of claim 25, wherein the overtube is actuated by applying a distally directed force to the overtube moving a distal end of the overtube against a lip on a distal end of the sheath, redirecting a portion of the distally directed force to a radially expansive force.

27. The method of claim 25, wherein the overtube is actuated by applying a proximally directed force to the overtube via pullwire extending from a proximal handle which remains external to the body in an operative configuration to a distal end connected to a portion of the overtube adjacent the slots.

28. The method of claim 25, wherein the sheath is sized so that, when inserted into a target body lumen, the lumen is dilated.

29. The method of claim 18, further comprising the step of advancing an overtube over the sheath, the overtube having a radio-frequency contact patch provided on a distal portion thereof, the patch aiding in insertion of the overtube by one of cutting and cauterizing adjacent portions of tissue during insertion into the body.