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Radio-frequency based catheter system and method for ablating biological tissues

A technology of biological tissue and radio frequency, which is applied in application, parts of surgical instruments, medical science, etc., can solve time-consuming and unresolved problems

Inactive Publication Date: 2006-09-13
MEDWAVE INC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While this design reduces the likelihood of antenna or catheter electrode slippage during each ablation step, it does not address the issue of ensuring precise antenna placement for each ablation step along the desired ablation path. time consuming work process

Method used

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  • Radio-frequency based catheter system and method for ablating biological tissues
  • Radio-frequency based catheter system and method for ablating biological tissues
  • Radio-frequency based catheter system and method for ablating biological tissues

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Embodiment Construction

[0027] The present invention relates to a radiofrequency-based catheter system for ablation of biological tissue, as shown in FIG. 1 . In particular, the present invention enables the ablation of tissue located in internal vessels of living animals by means of a radio frequency (RF) antenna as part of a catheter. The catheter can be inserted into the lumen or body vessel of such an animal, and the RF antenna is positioned adjacent to the tissue to be ablated, where the RF energy is applied for tissue ablation.

[0028] The present invention provides a device for generating a sequence of pulses of RF energy, in particular in the microwave frequency range, which is transmitted via an electrical transmission line to an RF antenna. The frequency of the RF energy pulses can be selectively varied according to the electrical characteristics of the electrical transmission line and load impedance associated with tissue ablation.

[0029] The present invention also includes means for s...

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Abstract

An improved radio-frequency based catheter system and method for ablating biological tissues within the body vessel of a patient comprises a radio-frequency ('RF') generator for selectively generating high frequency energy in a deployable catheter having a RF co-axial transmission line with a hollow lumen, a RF antenna mounted on the distal portion of the catheter, and steering control lines in the lumen of the transmission line for steering catheter while being inserted into the body vessel and for deflecting the RF antenna to accommodate the contour of the body vessel where tissue ablation is needed.

Description

[0001] related application [0002] This application is a continuation of U.S. Patent Application Serial No. 10 / 306,757, filed November 27, 2002, which is a continuation of U.S. Patent Application Serial No. 10 / 306,757, filed December 11, 1999, with Application Serial No. 09 / 459,058, which is a continuation of US Patent Application Serial No. 09 / 459,058, which is a continuation of US Patent Application Serial No. 09 / 211,188 (currently Serial No. 6,190,382). technical field [0003] The present invention relates to a radiofrequency (RF) based catheter system for ablating tissue and occlusions, particularly within fluid-filled lumens of animals such as the human heart, liver, arteries, vessels, etc. (which has an electric field created around the RF antenna). In particular, the present invention relates to means for providing impedance matching between an electrosurgery electrode (eg, antenna) and its surroundings by controllably adjusting the frequency to minimize reflections...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B18/04A61BA61B18/14
CPCA61B2018/1407A61B18/18A61B2018/1437A61B2018/00839A61B2018/00875A61B18/1492A61B2018/00214A61B2017/003A61B19/54A61B90/39
Inventor 西奥多·C·奥士比罗铭勋乔治·L·梁
Owner MEDWAVE INC
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