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SUTURE SLEEVE WITH REMOVABLE FINS

IP.com Disclosure Number: IPCOM000125732D
Publication Date: 2005-Jun-15
Document File: 3 page(s) / 95K

Publishing Venue

The IP.com Prior Art Database

Abstract

The present invention is directed to a pacing lead stabilizer having detachable fins. The detachable fins can be quickly and easily removed from the associated pacing lead stabilizer without requiring tools. Furthermore, the fins are removable at a pre-defined location to increase reliability and accuracy of removal. Finally, the fins are removable in such a manner that undue jagged edges or other surface irregularities are avoided.

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SUTURE SLEEVE WITH REMOVABLE FINS

                    Patient movement and cardiac contractions may dislodge an implanted pacing lead component of an implanted medical device, such as a pacemaker, from its original position.  Movement of the pacing lead can exert tension on the associated pulse-generating device and may cause patient discomfort.  To prevent movement of the lead, the sleeve is installed onto the lead, and the sleeve is sutured to the adjacent tissue to prevent lead movement. 

                    Suture sleeves sometimes include fins to provide a convenient grip during implantation.  The fins can also be sized large enough to prevent the suture sleeve from sliding distally along the lead into the heart, where it can be difficult to retrieve.  However, such fins cause the implanted suture sleeve to have an irregular profile and may increase chronic irritation at the tissue surface.

                    The present invention is directed to a pacing lead stabilizer having detachable fins.  FIG. 1 shows a pacing lead stabilizer 10 in accordance with one embodiment of the present invention.  The pacing lead stabilizer 10 includes a hollow, tubular body 12 sized to slidingly receive a pacing lead in an open lumen 14 extending therethrough.  The outer surface of the stabilizer includes depressions 16 for receiving sutures.  The stabilizer 10 also includes a pair of opposing fins 18 extending from the body of the stabilizer.  The fins 18 include a base portion 20 extending longitudinally along the stabilizer body 12.  The base portion 20 is formed with a slot 22 extending substantially longitudinally therethrough, such that a majority of the fin 18 is spaced apart from the body 12.  An inner surface 23 of the base portion 20 facing the slot 22 is contoured to match the profile of the adjacent surface of the stabilizer body 12.  The fins 18 are attached to the body 12 at an attachment region 24. 

                    The fins 18 are detachable by grasping the fins 18 and pulling in the direction of arrow 28.  The attachment region 24 is preferably located at a distal end of the fins 18. The proximal edge geometry of the attachment region 24 comes to a sharp corner to promote high stress concentrations if a distally directed force is applied to the fin.  However, the distal surface of the attachment region 24 is smooth and rounded to prevent high stress concentration if a proximally directed force is applied.  The slots 22 include an enlarged region forming a stress point 26 adjacent the attachment region 24. The fins 18 resist proximally directed forces experienced when resisting sleeve migration into the heart, but can be easily torn off if the surgeon pulls the fin 18 in a distal...