The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 20, 2000
Filed:
Sep. 08, 1998
Kenneth B Stokes, Anoka, MN (US);
Medtronic, Inc., Minneapolis, MN (US);
Abstract
The present invention is directed to a medical electrical lead having active fixation which features an improved fixation helix. In particular the present invention is a medical electrical lead having a fixation helix which features microgrooves. The microgrooves are dimensioned so as to minimize the foreign body response of the tissue into which the helix is implanted. The microgrooves preferably consist of a series of grooves parallel to the longitudinal axis of the helix, each groove has a depth of between approximately 0.1 to 30 microns, preferably between approximately 0.1 and 3, with 1 micron preferred; a width of between approximately 0.1 to 30 microns, preferably between approximately 0.1 and 3, with 1 micron preferred; and is spaced apart from every other groove by a distance of between approximately 0.1 to 30 microns, preferably between approximately 0.1 and 3, with 1 micron preferred. Although shown as square, the grooves may be of any shape, including rectangular, polygonal, rounded or even irregularly shaped.