US 5,188,634 AGranted

Rotatable laser probe with beveled tip

AssigneeTrimedyne, Inc.

InventorsHany M. G. Hussein, Marvin Loeb, Kenneth M. Galt

Life of this patent

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Abstract

A catheter for ablating obstructing material within a corporal lumen includes a fiber optic member through which radiant energy can be transmitted to a distal end adjacent the site of the obstructing material. Beveled surfaces carried on the distal end of the fiber optic member provide output beams of radiant energy oriented in a direction on the order of 45.degree. with respect to an axis of the member. The laterally deflected radiant energy beams impinge upon regions of plaque or obstructing material in the lumen and have an effective radius greater than the radius of the fiber optic member. By rotating the fiber optic member, a circular locus within the lumen can be ablated or vaporized to create a channel in the lumen with a diameter greater than the diameter of the fiber optic member.

Claims10

Dependent claims

An apparatus for delivering radiant energy at a predetermined power density to a displaced region comprising:

at least one elongated, optical conductor of radiant energy of a selected radius having a proximal end and a distal end with a cross section of a predetermined area wherein radiant energy injected into said proximal end exits at said distal end;
an elongated housing having a central axis and with said conductor carried thereby for rotation relative to said housing about said axis;
and
a first beveled deflecting surface integrally formed on said distal end, adapted to deflect and cause said radiant energy to exit said surface laterally with respect to said axis;
and
a second beveled deflecting surface integrally formed on said distal end but displaced from said surface, adapted to deflect and cause said radiant energy to exit said second surface laterally with respect to said axis;
whereby rotation of said optical conductor about said axis forms a first locus of incidence on the region with a radius greater than said selected radius and a second locus of incidence on the region displaced laterally from said first locus.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 07/553,450Filed 13 Jul 1990
Granted: 23 Feb 1993
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

A61B 18/245
With a catheter: for removing obstructions in blood vessels or calculi
A61B 2017/22051
Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones;…
A61B 2018/1861
Using microwaves: with an instrument inserted into a body lumen or cavity, e.g. a catheter
A61B 2018/2277
With reflective or refractive surfaces for deflecting the beam: with refractive surfaces