Screw-in lead having lead tip with membrane

Details Screw-in lead having lead tip with membrane Screw-in lead having lead tip with membrane

1980-09-30

1982-01-19

Kamm, William E.

Surgery

Truss

Pad

128419P, A61N 104

Patent

active

043111530

ABSTRACT:
A screw-in endocardial transvenous pacing lead having a lead tip with a sealing membrane. The lead is chronically affixed by a helical fixation coil having a pointed tip which is rotatably advanced through a helical lumen in the lead tip into the endocardial tissue. During transvenous insertion, the helical fixation coil is retracted into a chamber to protect against damage of the vein. A sealing membrane is positioned perpendicularly within the helical lumen of the lead tip preventing ingress of body fluids. The sealing membrane is of silicon rubber with a polyurethane coating on either side. Upon being properly located within the heart, the helical fixation coil is rotatably extended. The pointed tip of the helical fixation coil punctures the sealing membrane normal to its direction of travel. The sealing membrane provides a seal around the helical fixation coil.

REFERENCES:
patent: 4046151 (1977-09-01), Rose
patent: 4106512 (1978-08-01), Bisping
patent: 4142531 (1979-03-01), Magovern et al.
patent: 4146036 (1979-03-01), Dutcher et al.
patent: 4217913 (1980-08-01), Dutcher

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