Seal for use with cardiac lead
First Claim
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1. An implantable lead for implantation by a guidewire on or about the heart, the lead comprising:
- a lead body having distal and proximal ends, the lead body defining a lumen extending from a distal aperture in the distal end of the lead body toward the proximal end of the lead body;
a conductor disposed within the lead body;
an electrode disposed proximate the distal end of the lead body, the electrode electrically coupled to the conductor; and
a seal at the distal end of the lead body, the seal having an open and a closed state, wherein when the seal is in the open state the seal receives the guidewire therethrough and when the seal is in the closed state the seal prevents fluid from entering the lumen of the lead body;
wherein the seal is transitionable from the open state to the closed state and is coupled to a housing having a proximally located shoulder.
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Abstract
A seal adapted for use with medical devices is provided. The medical device may be a lead having a distal tip adapted for implantation on or about the heart and for connection to a system for monitoring or stimulating cardiac activity. The lead assembly in one embodiment includes an atraumatic tip. A seal is provided within the lead tip assembly, which prevents or limits further entry of fluids through the lead tip. The lead may be a left ventricular lead with a hemostasis mechanism provided therewithin.
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Citations
16 Claims
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1. An implantable lead for implantation by a guidewire on or about the heart, the lead comprising:
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a lead body having distal and proximal ends, the lead body defining a lumen extending from a distal aperture in the distal end of the lead body toward the proximal end of the lead body; a conductor disposed within the lead body; an electrode disposed proximate the distal end of the lead body, the electrode electrically coupled to the conductor; and a seal at the distal end of the lead body, the seal having an open and a closed state, wherein when the seal is in the open state the seal receives the guidewire therethrough and when the seal is in the closed state the seal prevents fluid from entering the lumen of the lead body; wherein the seal is transitionable from the open state to the closed state and is coupled to a housing having a proximally located shoulder. - View Dependent Claims (2, 3, 4, 5)
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6. An implantable lead for implantation by a guidewire on or about the heart, the lead comprising:
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a lead body having distal and proximal ends, the lead body defining a lumen extending from a distal aperture in the distal end of the lead body toward the proximal end of the lead body, a conductor disposed within the lead body; an electrode disposed proximate the distal end of the lead body, the electrode electrically coupled to the conductor; and a closable seal disposed at the distal end of the lead body and on an inner surface of the lead body, the closable seal defining a closable seal lumen for receiving the guidewire and includes at least one cusp. - View Dependent Claims (7, 8, 9, 10, 11)
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12. An implantable lead for implantation by means of a guidewire on or about the heart, the lead comprising:
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a lead body having distal and proximal ends, the lead body defining a lumen extending from a distal aperture in the distal end of the lead body toward the proximal end of the lead body; a conductor disposed within the lead body; an electrode disposed proximate the distal end of the lead body, the electrode electrically coupled to the conductor; and a seal at the proximal end of the lead body, the seal having a first state wherein the seal defines an aperture to receive the guidewire, the seal having a second state wherein the seal limits the flow of fluids into the lead body. - View Dependent Claims (13, 14, 15, 16)
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Specification