Implantable medical device with positive indication of lead conn

Details Implantable medical device with positive indication of lead conn Implantable medical device with positive indication of lead conn

1998-09-09

2000-08-29

Layno, Carl H.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

607 36, A61N 1375

Patent

active

061121215

ABSTRACT:
An implantable medical device including an enclosure and a header portion attached to the enclosure. The header includes a lead cavity into which a lead can be inserted. The lead cavity includes a compression device, such as a spring, for aligning a highly visible indicator plunger at least partially hidden from view inside the volume defined by an annular electrode, or other opaque object, partially surrounding the lead cavity. The plunger includes at least a portion that is easily visible to a surgeon during implantation of the medical device. When a lead is inserted into the lead cavity, the end of the lead pushes against the indicator plunger thereby moving the plunger and compressing the spring. When the lead is fully inserted into the lead cavity, the plunger becomes visible as it is pushed away from the volume defined by the annular electrode. In this way, the plunger provides a positive indication that the lead has been fully inserted into the header. The annular electrode may also include a retaining surface that will contact a corresponding surface on the plunger should the plunger break loose from the spring. This feature helps to keep the plunger from migrating from the header into the body should the plunger break away from the spring.

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