Electromedical lead assembly

Abstract

Abstract 1491942 Electromedical lead MEDTRONIC INC 27 Jan 1975 3444/75 Heading A5R A first embodiment of electromedical lead (Fig. 1) comprises: an electrode 11; a body member 10 comprising an electrical conductor surrounded by a sheath of insulating body-inert material; and tines 12 extending from a location adjacent said electrode 11 for preventing inadvertant retraction of the lead. The lead may be provided with a longitudinally extending lumen so that it can be inserted with the aid of a stylet. The tines 12 are unrestrained and the lead is inserted into a vein with the tines extended. In an alternative embodiment (Fig. 7) the tines 12 are restrained against the body portion 10 during insertion by a shroud 31 and when the lead is in position a balloon 30 may be inflated via the stylet lumen to extend the tines 12. A further embodiment (Fig. 12) is inserted with the tines 12 restrained by a shroud 53 and when the lead is in position, pressure on the tip 11 by a stylet 55 causes a portion 55 of the body 10 to stretchthereby releasing the tines. A further embodiment (Fig. 9) has the tines restrained by a coiled portion 41 of a stylet 40 which is retracted to release the tines 12. A further embodiment (Fig. 8 not shown) has the tines restrained by a shroud which may be retracted by an attached line. The leads may be inserted with the aid of J-shaped stylets or applicator catheters to aid insertion into the atrium. The tines 12 may be made of silicone rubber or polyurethane and may be impregnated with carbon, borium sulphate or tantalum to render them X-ray opaque.

Inventors

No inventors recorded.

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