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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 hollow anatomical structure is reduced by the heating effect, and the electrodes of the primary leads are moved closer to one another as the diameter reduces. Where the hollow anatomical structure is a vein, energy is applied until the diameter of the vein is reduced to the point where the vein is occluded. The catheter can include a lumen to accommodate a guide wire or to allow fluid delivery.
[0024] Certain devices and methods disclosed herein are capable of more evenly distributing energy along the target hollow anatomical structure utilizing lower temperatures and the ability to regulate power via a temperature feedback loop in a continuous simultaneous length.

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.
When a venous valve fails, increased strain and pressure occur within the lower venous sections and overlying tissues, sometimes leading to additional, distal valvular failure.

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

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Experimental program
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second embodiment

[0126] 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 and advancement through ...

embodiment 870

[0268]FIG. 47 shows another embodiment 870 of the device of FIG. 45. The spline sets 874 are arranged for bipolar RF. In this embodiment, each electrode spline set 874 has a different polarity from an adjacent electrode spline set.

[0269] The embodiments illustrated in FIGS. 45-47 can be used in conjunction with the multiplexer process when used in a stationary manner.

[0270] With reference to FIG. 48, in one embodiment the device 900 has expandable-cantilevered electrodes 902 similar to those described above. The device has one or more electrodes 902 in one or more sets of electrodes 904. Proximal to the electrode sets 904 is a sheath-mounted heating element 908 (e.g., a resistive coil). The proximal heating coil preferably initiates the treatment process and the expanded electrodes preferably complete the treatment process. The effective length of the proximal coil element can be controlled by the use of a sheath component similar to that described above with reference to FIG. 37. ...

first embodiment

[0314]FIG. 69 shows 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 to 1.67 mm or about a 3...

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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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