Snaring systems and methods
First Claim
Patent Images
1. A snaring system for engaging an object within a patient'"'"'s body, the system comprising:
- a sheath having a sidewall, a central longitudinal axis and a lumen laterally offset from the central longitudinal axis;
an elongate element extending through at least a portion of the lumen, wherein the elongate element has a proximal end and a distal end, the distal end comprising a loop;
a first rotatable bearing disposed along the loop at the distal end of the elongate element, the first rotatable bearing having a first length;
a second rotatable bearing disposed along the loop at the distal end of the elongate element, the second rotatable bearing having a second length, the second length being less than the first length; and
a third rotatable bearing disposed along the loop at the distal end of the elongate element, wherein the second rotatable bearing is disposed along the loop at the distal end of the elongate element between the first rotatable bearing and the third rotatable bearing, the third rotatable bearing having a third length, and the third length being greater than the second length.
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Abstract
Snaring systems and methods involve engaging objects such as pacemaker pacing leads within a patient. Physicians can use snaring systems having loops, tags, and roller mechanisms to remove a pacing leads from a patient. For example, snaring systems can be inserted through a jugular access site, engaged with a pacemaker pacing lead, and withdrawn through the jugular access site so as to remove a portion of the pacing lead. Lead extraction techniques can be employed to further dislodge the pacing lead from the patient.
175 Citations
20 Claims
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1. A snaring system for engaging an object within a patient'"'"'s body, the system comprising:
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a sheath having a sidewall, a central longitudinal axis and a lumen laterally offset from the central longitudinal axis; an elongate element extending through at least a portion of the lumen, wherein the elongate element has a proximal end and a distal end, the distal end comprising a loop; a first rotatable bearing disposed along the loop at the distal end of the elongate element, the first rotatable bearing having a first length; a second rotatable bearing disposed along the loop at the distal end of the elongate element, the second rotatable bearing having a second length, the second length being less than the first length; and a third rotatable bearing disposed along the loop at the distal end of the elongate element, wherein the second rotatable bearing is disposed along the loop at the distal end of the elongate element between the first rotatable bearing and the third rotatable bearing, the third rotatable bearing having a third length, and the third length being greater than the second length. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of engaging an object disposed within a patient, the method comprising:
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inserting a snaring system through an access site of a patient, wherein the snaring system comprises; an elongate element having a proximal end and a distal end, the distal end comprising a loop; a sheath having a sidewall, a central longitudinal axis and a lumen in the sidewall and laterally offset from the central longitudinal axis through which the elongate element extends; a first rotatable bearing disposed along the loop at the distal end of the elongate element, the first rotatable bearing having a first length; a second rotatable bearing disposed along the loop at the distal end of the elongate element, the second rotatable bearing having a second length, the second length being less than the first length; a third rotatable bearing disposed along the loop at the distal end of the elongate element, wherein the second rotatable bearing is disposed along the loop at the distal end of the elongate element between the first rotatable bearing and the third rotatable bearing, the third rotatable bearing having a third length, and the third length being greater than the second length; engaging the object with at least one of the first rotatable bearing, the second rotatable bearing, and the third rotatable bearing; and withdrawing the snaring system toward the access site, so as to move at least a portion of the object toward the access site. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification