초록 ▼

A guidewire placed lead employing a seal at its distal end in order to prevent entry of body fluid into the lead. The seal is particularly designed to allow radial expansion of the outer circumference of the seal due to passage of the guidewire through the seal, reducing the force required to pass t

A guidewire placed lead employing a seal at its distal end in order to prevent entry of body fluid into the lead. The seal is particularly designed to allow radial expansion of the outer circumference of the seal due to passage of the guidewire through the seal, reducing the force required to pass the guidewire through the seal, while retaining a good sealing characteristics. The seal may extend a distance distally from the tip electrode, and include a hollow, resilient, cup-shaped seal member, configured so that the seal can readily expand radially as the guidewire passes through it. Alternatively, the seal may be located within the body of the electrode and the electrode configured so that it may be radially or laterally expanded, also allowing radial expansion of the seal during passage of the guidewire. In this case, the electrode may be rendered expandable by means of one or more slits arranged along the electrode body, extending from a point proximal to the guidewire seal.

대표청구항 ▼

[ In conjunction with the above, we claim:] [1.] An implantable lead, comprising:an elongated insulative lead body having a lumen extending through at least a distal portion of the lead body;an elongated conductor mounted within the lead body and extending along the lead body;an electrode mounted to

[ In conjunction with the above, we claim:] [1.] An implantable lead, comprising:an elongated insulative lead body having a lumen extending through at least a distal portion of the lead body;an elongated conductor mounted within the lead body and extending along the lead body;an electrode mounted to a distal portion of the lead body, coupled to the conductor and having a lumen aligned with the lumen of the lead body and open to the distal end of the lead; anda generally cup-shaped resilient seal extending distally from the electrode.