Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical energy applicator
Patent
1991-12-23
1993-11-09
Kamm, William E.
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical energy applicator
607122, A61N 105
Patent
active
052593940
ABSTRACT:
An endocardiac lead of the type including a conductive spiral winding 2 placed inside a sheath 1 made of a flexible material being insensitive to body fluids. This spiral winding 2 is electrically connected to an electrode 3 intended for being brought into contact with the inner wall of the heart. The electrode 3 is hollow and accommodates along its centerline a deformable helix 6 intended for fastening the lead into the heart muscle. The inner diameter of the electrode 3 is smaller than the outer diameter of the undeformed helix 6. The helix 6 presents a sufficient longitudinal elasticity modulus for being retractable inside the electrode 3 with a mechanical deformation, while the helix will substantially recover its initial shape during its extraction out of the electrode and secure the electrode to the tissue. The helix 6 may be made of a nickel-titanium based alloy. The inner wall of the electrode 3 presents a deformation having the shape of a notch 13 against which the helix 6 will abut during its extraction.
REFERENCES:
patent: 4217913 (1980-08-01), Dutcher
patent: 4280512 (1981-07-01), Karr et al.
patent: 4917106 (1990-04-01), Olivier
ELA Medical
Getzow Scott M.
Kamm William E.
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