TISSUE SLITTING METHODS AND SYSTEMS

摘要

Methods and systems for separating an object, such as a lead, from formed tissue are provided. Specifically, a tissue slitting device is configured to engage patient formed tissue at a slitting engagement point. While the object is subjected to a first traction force, the tissue slitting device is caused to move further into the engaged tissue and slit the tissue past the point of engagement. The slitting device causes the tissue to separate along an axial direction of the length of the formed tissue and releases at least some of the force containing the object. The methods and systems are well suited for use in cardiac pacing or defibrillator lead explant procedures.

主权项

1. A tissue slitting apparatus comprising:
a shaft, wherein the shaft is flexible, the shaft having a proximal end and a distal end, and wherein the shaft includes an inner lumen running from the proximal end to the distal end to receive at least one of an implanted object and a mechanical traction device, the inner lumen defining a longitudinal axis of the shaft; a tissue abrading device disposed adjacent to the distal end of the shaft, the tissue abrading device comprising:
a leading edge disposed at a distal portion of the tissue abrading device; andan abrading tip, wherein the abrading tip is disposed adjacent to the leading edge, wherein the abrading tip includes at least one reciprocating grinder, the at least one reciprocating grinder having at least one abrasive surface, wherein the at least one reciprocating grinder is configured to be operatively coupled with an actuator, and wherein the at least one reciprocating grinder is configured to reciprocate in a direction relative to the shaft via an actuation force provided by the actuator; andwherein the tissue abrading device is configured to wear a separation in a tissue growth along a side and a length of the tissue growth, and wherein the tissue slitting apparatus separates a first, but not a second, portion of the tissue growth around a circumference of the implanted object.