Devices and methods for lead extraction
First Claim
1. A lead extraction system comprising:
- a catheter sheath having a distal end, a proximal end, and at least one lumen extending therebetween;
a handle attached to the proximal end of the catheter sheath;
a delivery catheter inside the catheter sheath, the delivery catheter having a distal tip section, a distal end, a proximal end, and at least one lumen extending therebetween, wherein a hole saw electrode is disposed at the distal end of said delivery catheter, and wherein the proximal end of said delivery catheter is secured to the handle; and
a deployment means for the distal tip section of said delivery catheter to be deployed out of the distal end of the catheter sheath.
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Accused Products
Abstract
An improved lead extraction system using a rotatable hole saw electrode with a sharp cutting edge that is useful for the extraction and the removal of unwanted lead by a minimal invasive procedure. A lead extraction system suitable for radiofrequency ablation of scar tissues surrounding the implanted lead, is comprised of an outer catheter sheath and an inner delivery catheter having a distal end, a proximal end and at least one lumen extending therebetween, wherein a locking stylet is provided. In one embodiment, the lead extraction system has fluid infusion and irrigation means at its distal tip section and a rotatable hole saw electrode for loosening the target scar tissue by applying radiofrequency energy and cooled fluid to the said electrode and its contacted tissue.
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Citations
20 Claims
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1. A lead extraction system comprising:
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a catheter sheath having a distal end, a proximal end, and at least one lumen extending therebetween; a handle attached to the proximal end of the catheter sheath; a delivery catheter inside the catheter sheath, the delivery catheter having a distal tip section, a distal end, a proximal end, and at least one lumen extending therebetween, wherein a hole saw electrode is disposed at the distal end of said delivery catheter, and wherein the proximal end of said delivery catheter is secured to the handle; and a deployment means for the distal tip section of said delivery catheter to be deployed out of the distal end of the catheter sheath. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for operating a lead extraction system, the lead extraction system comprising an outer catheter sheath, an inner delivery catheter, a locking stylet, and a rotatable hole saw electrode mounted at a distal end of said inner delivery catheter, the method comprising the steps of:
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(a) sliding the lead extraction system over an existing lead in a patient, wherein the existing lead is surrounded by scar tissue; (b) intimately contacting a distal end of the outer catheter sheath with the scar tissue; (c) deploying the inner delivery catheter that comprises the hole saw electrode; (d) applying RF energy to the hole saw electrode while cutting through the scar tissue by simultaneously advancing and rotating the inner delivery catheter, wherein the RF energy is provided by an external RF energy generating means through an electrical conductor to the hole saw electrode; (e) engaging the locking stylet onto the lead; and (f) extracting the lead by pulling the lead extraction system out of a patient. - View Dependent Claims (13)
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14. A lead extraction system comprising:
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a catheter sheath having a distal end, a proximal end, and at least one lumen extending therebetween; a handle attached to the proximal end of the catheter sheath; a delivery catheter inside the catheter sheath, the delivery catheter having a distal tip section, a distal end, a proximal end, and at least one lumen extending therebetween, wherein a hole saw electrode means is disposed at the distal end of said delivery catheter, and wherein the proximal end of said delivery catheter is secured to the handle; a deployment means for the distal tip section of said delivery catheter to be deployed out of the distal end of the catheter sheath; and RF energy generating means for supplying RF energy to said electrode means. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification