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Sealing System for Sealing a Stylet Lumen of a Lead

IP.com Disclosure Number: IPCOM000129172D
Publication Date: 2005-Sep-29
Document File: 4 page(s) / 195K

Publishing Venue

The IP.com Prior Art Database

Abstract

Stimulation leads for various applications have a stylet lumen for inserting a stiff stylet within the lumen. The stylet is inserted into the stylet lumen during implantation of the lead. When the stylet is thus inserted, it provides added stiffness to the lead and helps facilitate placement and steering of the lead while it is being implanted. Once the stylet is removed, a system consisting of a ball plug and disposable insertion tool is used for plugging the stylet lumen.

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Sealing System for Sealing a Stylet Lumen of a Lead

                    Many stimulation leads for various applications have a stylet lumen for inserting a stiff stylet within the lumen.  The stylet is inserted into the stylet lumen during implantation of the lead.  When the stylet is thus inserted, it provides added stiffness to the lead and helps facilitate placement and steering of the lead while it is being implanted.

                    Cochlear leads, which may also be referred to as cochlear electrodes or electrode arrays, may also have stylet lumens.  After the electrode array is inserted into a patient’s cochlea, the stylet lumen may be left open to body fluids.  The opening of the stylet lumen may permit the possibility of ingress of body fluids and growth of bacteria within the lumen.

                    It would be desirable to have some means to simply and effectively close the stylet lumen opening at the proximal end of the electrode array after the array is implanted.

                    The inventive sealing system consists of two parts:  (1) a ball plug with a shank as shown in Figure 1 and (2) a disposable insertion tool, as shown in Figure 2.  The shank of the ball plug may be preloaded into the end of the insertion tool as shown in Figure 3.  The curvature of the shank allows the curved shank to be held in the elastic internal wall of the tubing wall as shown.  A sliding cover shown in Figure 2, can slide along the insertion tool shank and in one position, a covered position, cover the held plug ball.  The preloaded plug ball and insertion tool may be easily packaged together and sterilized.  As packaged, the clinician, therefore, does not h...