Stereotaxic catheter for microwave thermotherapy
First Claim
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1. Apparatus for microwave thermotherapy comprising:
- a catheter;
said catheter being insertable into living tissue;
at least first and second lumens extending along a substantial axial distance within said catheter;
said first and second lumens each including a proximal end and a distal end;
said distal end of each of said first and second lumens being sealed;
said proximal end of each of said first and second lumens including means for permitting the passage of electrical conductors therethrough;
a microwave antenna positionable within said first lumen, and effective, when said catheter is inserted into living tissue, and said microwave antenna is energized with microwave energy, for increasing a first temperature of a portion of said living tissue in a vicinity of said catheter; and
a temperature sensor positionable within said second lumen and effective for measuring a second temperature within said second lumen related to said first temperature, whereby said microwave energy may be controllable to maintain said first temperature within predetermined limits.
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Abstract
A multi-lumen catheter that contains two or more independent coaxial sensing elements which can be used for measuring and recording temperature over a wide area at the insertion site. In addition, this catheter can be used for withdrawing blood at its distal port. When a microwave probe is inserted into the proximal lumen and positioned within the catheter, it allows for accurate placement of the microwave field within the area which is temperature monitored.
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Citations
5 Claims
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1. Apparatus for microwave thermotherapy comprising:
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a catheter; said catheter being insertable into living tissue; at least first and second lumens extending along a substantial axial distance within said catheter; said first and second lumens each including a proximal end and a distal end; said distal end of each of said first and second lumens being sealed; said proximal end of each of said first and second lumens including means for permitting the passage of electrical conductors therethrough; a microwave antenna positionable within said first lumen, and effective, when said catheter is inserted into living tissue, and said microwave antenna is energized with microwave energy, for increasing a first temperature of a portion of said living tissue in a vicinity of said catheter; and a temperature sensor positionable within said second lumen and effective for measuring a second temperature within said second lumen related to said first temperature, whereby said microwave energy may be controllable to maintain said first temperature within predetermined limits. - View Dependent Claims (2, 3, 4)
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5. Apparatus for microwave thermotherapy comprising:
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a catheter; said catheter being insertable into living tissue; at least first and second lumens extending along a substantial axial distance within said catheter; said first and second lumens each including a proximal end and a distal end; said distal end of each of said first and second lumens being sealed; said proximal end of each of said first and second lumens including means for permitting the passage of electrical conductors therethrough; a microwave antenna positionable within said first lumen, and effective, when said catheter is inserted into living tissue, and said microwave antenna is energized with microwave energy, for increasing a first temperature of a portion of said living tissue in a vicinity of said catheter; a temperature sensor positionable within said second lumen and effective for measuring a second temperature within said second lumen related to said first temperature, whereby said microwave energy may be controllable to maintain said first temperature within predetermined limits; at least a third lumen having a proximal end and a distal end; said proximal and distal ends of said third lumen both being open whereby materials may be transported into and out of said living tissue in a vicinity of said portion of said living tissue; at least one radiopaque marker at a predetermined location on said catheter; and said predetermined location having a predetermined relationship to a location of said microwave antenna.
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Specification