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Home Heart Surgery Gauging-system-for-monitoring-channel-depth-in-percutaneous-endocardial-revascularization

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 Gauging system for monitoring channel depth in percutaneous endocardial revascularization

Details
Inventors: Negus, Charles Christopher; Linhares, Stephen J.; Rudko, Robert I.; Woodruff, Eileen A.;
Assignee: PLC Medical Systems, Inc. (Franklin, MA)
Primary Examiner: Peffley; Michael
Assistant Examiner:
Attorney, Agent or Firm: Iandiorio & Teska

A gauging system for monitoring channel depth in percutaneous endocardial revascularization surgery includes a catheter for percutaneous insertion into a heart chamber, including a source of tissue ablative energy for ablating a part of the wall of the heart chamber where a channel is to be created; a sensor device proximate the distal end of the catheter for sensing a boundary of the heart wall proximate the channel; and a detection circuit, responsive to the sensor device, for determining the position of the terminus of the channel in the heart chamber; alternatively, a mechanical stop extending radially beyond the distal tip may be used for physically limiting penetration of the catheter tip into the drilled channels.

DETAILED DESCRIPTION What is claimed is: 1.
A gauging system for monitoring channel depth in percutaneous endocardial revascularization surgery, comprising: a catheter for percutaneous insertion into a heart chamber, including a source of tissue ablative energy for ablating a part of a wall of the heart chamber where a channel is to be created; a sensor device proximate a distal end of said catheter for sensing a boundary of the heart wall proximate the channel; and a detection circuit, responsive to said sensor device, for determining a position of a terminus of said channel.
2.
A gauging system for monitoring channel depth in percutaneous endocardial revascularization surgery of claim 1 in which said source of tissue ablative energy is at a proximal end of said catheter and includes a conduit for conveying the ablative energy to and out the distal end of said catheter.
3.
The gauging system for monitoring channel depth in percutaneous endocardial revascularization surgery of claim 2 in which said source of tissue ablative energy is a laser.
4.
The gauging system for monitoring channel depth in percutaneous endocardial revascularization surgery of claim 3 in which said conduit includes a fiber optic element.
5.
The gauging system for monitoring channel depth in percutaneous endocardial revascularization surgery of claim 2 in which said conduit includes an electrical power supply at the proximal end of said catheter and electrical conductor means extending through the catheter.
6.
The gauging system for monitoring channel depth in percutaneous endocardial revascularization surgery of claim 5 in which said source of tissue ablative energy includes an ultrasonic transducer at the distal end of said catheter interconnected with said electrical conductor means.
7.
The gauging system for monitoring channel depth in percutaneous endocardial revascularization surgery of claim 5 in which said source of tissue ablative energy includes an electrode at the distal end of said catheter interconnected with said electrical conductor means


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