US4681122A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stereotaxic catheter for microwave thermotherapy
Assignee: Victory YSI Inc
•
Filing: 1985-09-23
•
Granted: 1987-07-21
•
Expires: 2005-09-23
Abstract
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.
Inventors
- 👤 Arthur Winters
- 👤 Casper S. Molee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:59
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/18; A61B18/1815; G; G01; G01K; G01K1/00; G01K1/02; G01K1/026; G01K7/00; G01K7/16; G01K7/22; A61B2018/1861; A61B5/00; A61B5/15; A61B5/150007; A61B5/150015; A61B5/15003; A61B5/150992; A61B90/00; A61B90/10; A61M; A61M25/00; A61M25/0021; A61M25/0023; A61M25/0026; A61M25/003
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
162 words
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.
Claim 2
Dependent Claim
162 words
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.
Claim 3
Dependent Claim
51 words
Apparatus according to claim 1, further comprising: at least a third lumen having a proximal end and a distal end; and said proximal and distal ends 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.
Claim 4
Dependent Claim
34 words
Apparatus according to claim 1, further comprising; 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.
Claim 5
Dependent Claim
12 words
Apparatus according to claim 1 wherein said temperature sensor is a thermistor.
Claim 6
Dependent Claim
235 words
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; 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.
Claim 7
Dependent Claim
235 words
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; 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.
References Cited (Backward Citations)
US3411507A
Cited
US3357431A
Cited
US3480003A
Cited
US3399542A
Cited
US3704705A
Cited
US4058114A
Cited
US4148005A
Cited
US4253469A
Cited
US4557272A
Cited
US4559951A
Cited
US4583556A
Cited
US4497324A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-07-20 | 1991-01-19 | 1991-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-20 | 1995-01-19 | 1995-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-20 | 1999-01-19 | 1999-07-21 | $7700.00 | Window Closed / Lapsed |