Methods and apparatus for treatment of hollow anatomical structures

Inactive Publication Date: 2006-04-20
TYCO HEALTHCARE GRP LP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0023] In one embodiment, a catheter includes a plurality of primary leads to deliver energy for ligating a hollow anatomical structure. Each of the primary leads includes electrodes located at the working end of the catheter. The primary leads are constructed to expand outwardly within a single plane for the purpose of conforming the hollow anatomical structure it is placed within to the expanded profile of the catheter. In doing so, the hollow anatomical structure is placed into apposition with the electrodes. Energy can then be applied from the leads to create a heating effect in the surrounding tissue of the anatomical structure. The diameter of the hollo

Problems solved by technology

When an incompetent valve is in the flow path, the valve is unable to close because the cusps do not form a proper seal and retrograde flow of the blood cannot be stopped.
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Method used

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  • Methods and apparatus for treatment of hollow anatomical structures
  • Methods and apparatus for treatment of hollow anatomical structures
  • Methods and apparatus for treatment of hollow anatomical structures

Examples

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Example

[0126] A second embodiment of the catheter, depicted in FIGS. 4 and 5, may be generally similar to the embodiment depicted in FIGS. 1-3, except as further described herein. The embodiment of FIGS. 4-5 employs a coiled catheter shaft 36 to facilitate apposition with the HAS wall. The embodiment of FIGS. 4 and 5 may be particularly useful in situations where external compression (such as manual, Esmark, or Tumescent Anesthesia) of the HAS or other methods are insufficient to cause the HAS diameter to reduce sufficiently to appose a fixed-diameter catheter. The coiled configuration may comprise an open helix or corkscrew, and can be made from a deformable material like pebax, polyimide, polyethylene or silicone. The helical shape can also be obtained by using a shaped spine or wire made from nickel-titanium, stainless-steel or other materials with similar characteristics.

[0127] An outer sheath 38 can be used to enclose and straighten the coiled catheter shaft 36 for introduction into ...

Example

[0314]FIG. 69 shows a first embodiment of the catheter design with a distal portion 1209 that transfers the energy directly to the HAS when expanded. In this configuration, the distal portion is pre-formed into a planar serpentine shape that stretches the opposing walls of the HAS outward until the top & bottom are forced together and collapsed onto the distal portion. In this expanded shape, the device can be at, for example, a minimum planar thickness range of 2 Fr to 10 Fr (0.66 mm to 3.3 mm) and maximum width range of 3 mm to 25 mm. The intent is to expand and flatten the HAS to approximately the thickness or diameter of the catheter distal portion. An example of a serpentine section is a device distal portion which is 4 Fr or 1.33 mm in diameter with a possible expansion width of 20 mm. A specific example would be to place a 5 Fr or 1.67 mm diameter device in a 8 mm diameter vein. The device then expands and in turn decreases the top to bottom height of the HAS from 8 mm down t...

Example

[0322]FIG. 78 shows a third embodiment of the catheter in its expanded state, or the state at which the catheter is ready to transfer energy to the HAS. The distal portion is comprised of a plurality of rings 1241 slidably disposed on the catheter shaft 1210. Typically, at least one of the rings 1241 is fixed relative to the catheter shaft so that one or both of the remaining rings can be slid towards or away from the fixed ring(s). Attached to the rings 1241 are two ribbon-like elements 40 that transfer energy to the HAS. The ribbon elements can have a cross-section that facilitates the desired outward planar expansion—such as rectangular, elliptical, etc.—when actuated. The ring / ribbon array can be attached to the catheter shaft at its distal end allowing outward planar movement when an actuation rod (not shown), attached to the proximal end of the ring / ribbon array, is actuated.

[0323] The ribbon elements 1240 can be made of an electrically-resistive material, such as nickel chro...

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Abstract

One embodiment comprises an apparatus for applying energy to a hollow anatomical structure having an inner wall. The apparatus comprises an elongate shaft having a distal end and a proximal end opposite the distal end; and a capacitive treatment element located near the distal end. The capacitive treatment element is sized for insertion into the hollow anatomical structure and placement near the inner wall. The capacitive treatment element is configured to create an electric field that extends at least partially into the inner wall. Other devices and methods for treatment of hollow anatomical structures are disclosed as well.

Description

RELATED APPLICATIONS; PRIORITY [0001] This application claims the benefit under 35 U.S.C. § 119(e) of each of the following U.S. Provisional Patent Applications: No. 60 / 608,335, filed Sep. 9, 2004, titled CATHETER WITH THERMAL ELEMENT FOR LIGATION OF HOLLOW ANATOMICAL STRUCTURES; No. 60 / 617,621, filed Oct. 8, 2004, titled ELECTRODE ELEMENT SYSTEMS; No. 60 / 618,827, filed Oct. 13, 2004, titled CATHETER WITH THERMAL ELEMENT FOR LIGATION OF HOLLOW ANATOMICAL STRUCTURES; No. 60 / 621,251, filed Oct. 22, 2004, titled VEIN CONFORMING CATHETER; No. 60 / 624,009, filed Nov. 1, 2004, titled CATHETER WITH THERMAL ELEMENT FOR LIGATION OF HOLLOW ANATOMICAL STRUCTURES; No. 60 / 645,964, filed Jan. 21, 2005, titled HOLLOW ANATOMIC STRUCTURE CONFORMING CATHETER; No. 60 / 659,287, filed Mar. 7, 2005, titled CATHETER WITH THERMAL ELEMENT FOR LIGATION OF HOLLOW ANATOMICAL STRUCTURES; and No. 60 / 664,316, filed Mar. 22, 2005, titled CATHETER WITH CAPACITIVE ELEMENT FOR TREATMENT OF HOLLOW ANATOMICAL STRUCTURES....

Claims

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Application Information

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IPC IPC(8): A61F7/00A61F7/12
CPCA61B18/08A61B18/1492A61B2018/00404A61B2018/046A61B2018/0022
Inventor ZIKORUS, ARTHUR W.THOMPSON, RUSSELL B.SANDER, FIONA M.PARKER, MARK P.
Owner TYCO HEALTHCARE GRP LP
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