Implant tool for extendable/retractable positive fixation lead
US5228455A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 20, 1991 |
| Grant date | Jul 20, 1993 |
| Priority date | — |
| Expiry date | May 20, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M25/09041
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An implant tool for use with an endocardial or other implantable lead having an extendable/retractable positive fixation tip includes a hollow cylindrical housing and a custom designed stylet. The cylindrical housing attaches to a proximal end of the implantable lead. The stylet is inserted through the implant tool and into a lumen of the lead. The presence of the stylet, made from a length of relatively stiff wire, helps guide the distal tip of the lead to a desired implant location. The cylindrical housing includes a body portion and an end portion. The end portion is rotatable relative to the body portion. The stylet includes a knob on its proximal end, and also includes a stub pin slightly forward of its proximal end. The stub pin is received within a slot along the side of the cylindrical housing. Two spaced-apart recesses along the length of the slot allow the stub pin to be respectively held therein. When the stub pin is held in a first recess, the stylet wire has advanced sufficiently far into the lead to facilitate implantation of the lead, but retains the positive fixation tip in its retracted position. When the stub pin is locked in a second recess, the stylet wire has a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.