Medical device snare

A method for using a medical device snare:

• inserting a medical device snare into a body passageway, the body passageway having an object, the medical device snare comprising:
• a first strip extending from a first proximal end to a first distal end and having a first interlock feature configured as a groove extending from proximate the first proximal end to the first distal end;
• a second strip extending from a second proximal end to a second distal end and having an intermediate point disposed between the second proximal end and the second distal end along a second strip longitudinal length, the second strip having a strip portion extending from the second proximal end to the intermediate point and having a second interlock feature configured as a rail extending from the second proximal end and terminating at the intermediate point, the strip portion defining a strip portion longitudinal length, the second strip having a snare portion extending from the intermediate point to the second distal end, the snare portion defining a snare portion longitudinal length, the strip portion longitudinal length being at least ten times the snare portion longitudinal length, the first distal end and the second distal end being fastened together at a joint to prevent parallel movement of the first strip and the second strip at the joint;
• and,
• wherein the first interlock feature configured as a groove and the second interlock feature configured as a rail are interlocked such that the first strip and the second strip are slidable parallel to one another along the strip portion, and the snare portion is not interlocked with the first strip so the snare portion forms a loop when at least one of the first strip and the second strip slides relatively parallel to the other;
• and
• a sheath extending from a proximal sheath end to a distal sheath end, the first strip with the snare portion being disposed within the sheath with the joint proximal the distal sheath end;
• exposing part of the first strip and at least part of the snare portion and the joint outside of the sheath at the distal sheath end;
• sliding at least one of the first strip and the second strip parallel relative to the other to form the loop at the distal sheath end, the loop defining a first span thereby deflecting the joint a first distance to a side of the sheath;
• snaring the object;
• and,
• sliding the at least one of the first strip and the second strip parallel relative to the other to contract the loop around the object.

A method for using a medical device snare, comprising:

• inserting a medical device snare into a body passageway, the body passageway having a side branch, the medical device snare comprising:
• a first strip extending from a first proximal end to a first distal end and having a first interlock feature configured as a groove extending from proximate the first proximal end to the first distal end;
• a second strip extending from a second proximal end to a second distal end and having an intermediate point disposed between the second proximal end and the second distal end along a second strip longitudinal length, the second strip having a strip portion extending from the second proximal end to the intermediate point and having a second interlock feature configured as a rail extending from the second proximal end and ending at the intermediate point, the strip portion defining a strip portion longitudinal length, the second strip having a snare portion extending from the intermediate point to the second distal end, the snare portion defining a snare portion longitudinal length, the strip portion longitudinal length being at least ten times the snare portion longitudinal length, the first distal end and the second distal end being fastened together at a joint to prevent parallel movement of the first strip and the second strip at the joint;
• and,
• wherein the first interlock feature configured as a groove and the second interlock feature configured as a rail are interlocked such that the first strip and the second strip are slidable parallel to one another along the strip portion, and the snare portion is not interlocked with the first strip so the snare portion forms a loop when at least one of the first strip and the second strip slides relatively parallel to the other;
• and
• a sheath extending from a proximal sheath end to a distal sheath end, the first strip and the snare portion being disposed within the sheath with the joint proximal the distal sheath end;
• exposing part of the first strip and at least part of the snare portion and the joint outside of the sheath at the distal sheath end;
• sliding at least one of the first strip and the second strip parallel relative to the other to form the loop at the distal sheath end, the loop defining a first span thereby deflecting the joint a first distance to a side of the sheath to direct the joint into the side branch.

A medical device snare, comprising:

• a first strip comprising a first proximal end, a first distal end, and a first interlock feature configured as a groove extending from proximate the first proximal end to the first distal end;
• a second strip comprising a second proximal end, a second distal end, an intermediate point defined between the second proximal end and the second distal end, a proximal strip portion extending from the second proximal end to the intermediate point and having a second interlock feature configured as a rail, the second interlock feature extending from the second proximal end along a length of the second strip portion and terminating at the intermediate point, and a distal strip portion extending distally from the intermediate point to the second distal end, wherein the first strip and the second strip are joined at the respective first distal end and second distal end, wherein the first interlock feature and the second interlock feature are interlocked to prevent lateral separation between the first strip and the proximal strip portion of the second strip, and wherein the first strip and the distal strip portion of the second strip are laterally separable to form a snare portion;
• and
• a handle coupled to one of the first strip or the second strip, wherein the handle is configured to advance or retract one of the first strip or the second strip relative to the other of the first strip or the second strip.