Devices and methods for directed, interstitial ablation of tissue
First Claim
Patent Images
1. A catheter device adapted for delivering laser energy to a body tissue comprising:
- a) an elongate hollow tube mounted to a housing and having a distal end portion defining a lasing port;
b) a flexible energy conduit adapted for connection to a laser energy source, extending through said hollow tube and including a distal end adapted to emit laser energy to a predetermined tissue site through said lasing port;
c) a fluid conduit for passing a fluid or creating a vacuum through said lasing port; and
d) a sheath mounted to the housing and surrounding said hollow tube up to about said lasing port.
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Abstract
The invention relates to a catheter device including an optical fiber whose distal end is disposed within a hollow tube with a sharp or needle shaped distal end, which can penetrate tissue. The distal end of the optical fiber and the hollow tube are configured so as to emit, by refraction (total internal reflection) or reflection from a metal surface, laser energy at an angle of about 80° to about 90° relative to the longitudinal axis of the optical fiber and hollow tube. The hollow tube is mounted to a housing and may be surrounded by a sheath.
105 Citations
20 Claims
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1. A catheter device adapted for delivering laser energy to a body tissue comprising:
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a) an elongate hollow tube mounted to a housing and having a distal end portion defining a lasing port;
b) a flexible energy conduit adapted for connection to a laser energy source, extending through said hollow tube and including a distal end adapted to emit laser energy to a predetermined tissue site through said lasing port;
c) a fluid conduit for passing a fluid or creating a vacuum through said lasing port; and
d) a sheath mounted to the housing and surrounding said hollow tube up to about said lasing port. - View Dependent Claims (2, 3, 4, 5)
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6. A catheter device for delivery of laser energy to a body tissue and comprising
a housing; -
an elongate hollow tube mounted to the housing, the hollow tube having a distal end portion terminating in a closed, sharp distal end, defining a lasing port in the distal end portion, and having an internal reflective surface opposite the lasing port;
a fiber optic, adapted for connection to a laser energy source extending through the hollow tube and provided with a beveled distal end adapted to emit laser energy to a predetermined tissue site through said lasing port; and
a sheath surrounding the hollow tube up to about the lasing port. - View Dependent Claims (7)
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8. A catheter device adapted for delivering laser energy to a body tissue comprising:
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a) a source of laser energy;
b) an elongate hollow tube including a peripheral wall terminating in a distal closed tip and the peripheral wall defining first and second spaced-apart ports;
c) an elongate fiber optic extending through said tube and including a distal end having a tip adapted to emit laser energy in a direction generally normal to the longitudinal axis of the device through a port defined in said wall of said tube, and a proximal end adapted for connection to the source of laser energy, said fiber optic being spaced from said outer wall and said distal closed tip of said tube to define a fluid channel in said tube which surrounds said fiber optic; and
d) a pump for introducing a fluid or a vacuum through said first and second ports and through said channel for cooling and cleaning said distal end of said fiber optic. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification