Laser device for ablation of human tissue

Details Laser device for ablation of human tissue Laser device for ablation of human tissue

1994-03-02

1996-01-30

Pellegrino, Stephen C.

Surgery

Instruments

Light application

606 17, A61B 1736

Patent

active

054877407

ABSTRACT:
A medical device and method are provided for generating deep coagulation necrosis as well as surface vaporization in the site of a body cavity. The device provides means for delivering laser energy from the side of the device while providing localized irrigation at its laser delivery port. Laser energy is delivered from a fiberoptic that is bent at its distal end and placed in a catheter body which includes an irrigation channel that terminates at the distal end of that fiberoptic. Deep coagulation necrosis is achieved by: a) placement under endoscopic guidance of the device in the body cavity, b) delivering a predetermined dose of laser energy to target tissue, and c) rotating the device continuously during laser delivery, with at least one revolution in one direction. After the coagulation session has been completed, a detachable heat-generating cap may be mounted at the distal end of the catheter in order to convert the direct laser energy into controlled thermal energy at the surface of that cap. Placement of the heated cap in contact with tissue causes localized and efficient vaporization of that tissue and subsequently creates an immediate lumen within the tissue.

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