Cardiac pacemaker lead with extendable/retractable fixation

Details Cardiac pacemaker lead with extendable/retractable fixation Cardiac pacemaker lead with extendable/retractable fixation

1998-07-02

2000-08-22

Kamm, William E.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical energy applicator

A61N 105

Patent

active

061085820

ABSTRACT:
A cardiac stimulator lead is provided that includes a connector for connecting to a cardiac stimulator and a tubular insulating sleeve that has a first end coupled to the connector and a second end. An electrode is coupled to the second end and has a longitudinal bore. An extendable/retractable corkscrew is positioned in the bore. In one aspect, the lead includes a radiopaque member moveable with the corkscrew to verify axial movement. In another aspect, the bore is configured so that the corkscrew will not extend fully unless tissue is present to engage the corkscrew. In another aspect, a shape-memory polymeric washer is included to restrict fluid influx after corkscrew deployment.

REFERENCES:
patent: 4106512 (1978-08-01), Bisping
patent: 4311153 (1982-01-01), Smits
patent: 4463765 (1984-08-01), Gold
patent: 4567901 (1986-02-01), Harris
patent: 4667686 (1987-05-01), Peers-Travarton
patent: 5129404 (1992-07-01), Spehr et al.
patent: 5456708 (1995-10-01), Doan et al.
patent: 5545201 (1996-08-01), Helland et al.
Intermedics, Inc., Temporary Transcutaneous Pacing Wire Extension Lead Model 366-02--Sales Brochure, all pages, Oct. 1982.
CPI, Inc., Endotak C Physician's Manual, all pages, date unknown.

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