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Helically shaped electrophysiology catheter

a catheter and electrophysiology technology, applied in the field of cardiac arrhythmia treatment, can solve the problems of traumatic surgical technique and unacceptable to a large number of patients, and achieve the effects of improving lesion formation, low profile configuration, and convenient deploymen

Inactive Publication Date: 2005-01-20
CARDIMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The invention is a device for ablating tissue in a patient's body lumen, such as the heart, to treat atrial arrhythmias. The device has a helically shaped distal shaft section with one or more electrodes for ablation and sensing / pacing. The helical shape of the shaft section is designed to conform to the inner diameter of the body lumen, without significantly expanding and injuring the lumen. The device can be slidably disposed in a guiding catheter for advancement within the patient's vasculature. The helically shaped distal shaft section can be reversibly deformed and collapsed into a straight configuration for easy placement within the guiding catheter. The electrodes on the helically shaped section can be used for unipolar or bipolar use, and the device can be used for mapping and pacing purposes. The technical effects of the invention include improved device flexibility, improved ablation and sensing capabilities, and improved treatment outcomes for atrial arrhythmias."

Problems solved by technology

However, the surgical technique is quite traumatic and is unacceptable to a large number of patients.
A major problem of RF ablation techniques is forming a lesion of the requisite size, which completely ablates the area of interest but does not unnecessarily destroy surrounding healthy tissue.

Method used

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  • Helically shaped electrophysiology catheter
  • Helically shaped electrophysiology catheter
  • Helically shaped electrophysiology catheter

Examples

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Embodiment Construction

[0026]FIG. 1 illustrates one embodiment of the EP device 10 of the invention, generally comprising an elongated shaft 11 having a proximal shaft section 12, a helically shaped distal shaft section 13, and a plurality of electrodes 14 on the distal shaft section 13. An electrical connector 15 and an adapter 16 are on the proximal end of the device. FIG. 2 illustrates a transverse cross section of the distal end of the device 10 shown in FIG. 1, taken along lines 2-2.

[0027]FIG. 3 illustrates the EP device 10 within a guiding catheter 20 for introduction and advancement within the patient. The guiding catheter generally comprises an elongated shaft 21 having a proximal end 22, a distal end 23, a port 24 in a proximal shaft section, a port 25 in a distal shaft section, and a lumen 26 extending within the shaft to the port in the distal shaft section. As illustrated in FIG. 3, the helically shaped distal shaft section of the EP device 10 is reversibly deformed from the helical configura...

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Abstract

An electrophysiology (EP) device suitable for ablating tissue within a patient's body lumen. The EP device of the invention generally comprises an elongated shaft having a distal shaft section with a helical shape and at least one electrode on an exterior portion thereof. One aspect of the invention comprises a method of performing a medical procedure, such as treating a patient for atrial arrhythmia, by forming a lesion using an EP device embodying features of the invention.

Description

BACKGROUND OF THE INVENTION [0001] This invention generally relates to the treatment of cardiac arrhythmia and particularly atrial fibrillation and atrial flutter. [0002] Atrial fibrillation is the disorganized depolarization of a patient's atrium with little or no effective atrial contraction. Prior methods for treating a patient's arrhythmia include the use of anti-arrhythmic drugs such as sodium and calcium channel blockers or drugs which reduce the Beta-adrenergic activity. Other methods include surgically sectioning the origin of the signals causing the arrhythmia or the conducting pathway for such signals. However, the surgical technique is quite traumatic and is unacceptable to a large number of patients. A more frequently used technique to terminate the arrhythmia involves destroying the heart tissue which causes the arrhythmia by ablative energy, e.g., applying a laser beam or high frequency electrical energy such as RF or microwave energy, to a desired arrhythmogenic site ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61B18/14A61B18/12
CPCA61B18/1492A61B2018/0016A61B2018/00214A61B2018/1467A61B2018/00898A61B2018/1435A61B2018/00839
Inventor HILL, RICHARD E. IIILIM, ALEX L.HUYNH, TIMCHAN, ERIC K. Y.
Owner CARDIMA
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