Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Thermal applicators
Patent
1996-03-26
1999-08-17
Jastrzab, Jeffrey R.
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Thermal applicators
607102, A61N 502
Patent
active
059386924
ABSTRACT:
A catheter shaft carries a coaxial cable, the terminal end of which contains a dipole antenna with opposing first and second helical elements. The first and second helical elements originate from a common connection to an outer conductor of the coaxial cable. The first and second helical elements are formed by winding flat wire around an outer insulator of the coaxial cable near a terminal end of the coaxial cable. A variable, controllable impedance is connected between an inner conductor of the coaxial cable and a point on the second helical element where the resistive component of the antenna's impedance matches the characteristic impedance of the coaxial cable. The impedance match minimizes reflective losses of the antenna, thereby maximizing power transferred to the antenna. The antenna has an effective electrical length which is equal to one-half the wavelength of the radiation emitted, independent of the physical length of the antenna. The antenna also has a radiation length which can be adjusted by varying the number in pitch and turns of the flat wire and the location of the impedance matching point.
REFERENCES:
patent: 2407690 (1946-09-01), Southworth
patent: 3411507 (1968-11-01), Wingrove
patent: 3494723 (1970-02-01), Gray
patent: 4140130 (1979-02-01), Storm, III
patent: 4154246 (1979-05-01), LeVeen
patent: 4162500 (1979-07-01), Jacobi et al.
patent: 4204549 (1980-05-01), Paglione
patent: 4285346 (1981-08-01), Armitage
patent: 4290435 (1981-09-01), Waggott
patent: 4311154 (1982-01-01), Sterzer et al.
patent: 4312364 (1982-01-01), Convert et al.
patent: 4375220 (1983-03-01), Matvias
patent: 4448198 (1984-05-01), Turner
patent: 4497324 (1985-02-01), Sullivan et al.
patent: 4557272 (1985-12-01), Carr
patent: 4559951 (1985-12-01), Dahl et al.
patent: 4583556 (1986-04-01), Hines et al.
patent: 4601296 (1986-07-01), Yerushaimi
patent: 4612940 (1986-09-01), Kasevich et al.
patent: 4632127 (1986-12-01), Sterzer
patent: 4643186 (1987-02-01), Rosen et al.
patent: 4662383 (1987-05-01), Sogawa et al.
patent: 4669475 (1987-06-01), Turner
patent: 4676258 (1987-06-01), Inokuchi et al.
patent: 4690156 (1987-09-01), Kikuchi et al.
patent: 4700716 (1987-10-01), Kasevich et al.
patent: 4712559 (1987-12-01), Turner
patent: 4732161 (1988-03-01), Azam et al.
patent: 4776086 (1988-10-01), Kasevich et al.
patent: 4798215 (1989-01-01), Turner
patent: 4800899 (1989-01-01), Elliott
patent: 4813429 (1989-03-01), Eshel et al.
patent: 4821725 (1989-04-01), Azam et al.
patent: 4823812 (1989-04-01), Eshel et al.
patent: 4825880 (1989-05-01), Stauffer et al.
patent: 4841988 (1989-06-01), Fetter et al.
patent: 4860752 (1989-08-01), Turner
patent: 4865047 (1989-09-01), Chou et al.
patent: 4924863 (1990-05-01), Sterzer
patent: 4932420 (1990-06-01), Goldstein
patent: 4934365 (1990-06-01), Morgenthaler
patent: 4945318 (1990-07-01), Kabachinski
patent: 4955377 (1990-09-01), Lennox et al.
patent: 4967765 (1990-11-01), Turner et al.
patent: 4993430 (1991-02-01), Shimoyama et al.
patent: 4998933 (1991-03-01), Eggers et al.
patent: 5003991 (1991-04-01), Takayama et al.
patent: 5007437 (1991-04-01), Sterzer
patent: 5026959 (1991-06-01), Ito et al.
patent: 5056531 (1991-10-01), Shimoyama
patent: 5057106 (1991-10-01), Kasevich et al.
patent: 5061267 (1991-10-01), Zeiher
patent: 5097845 (1992-03-01), Fetter et al.
patent: 5106360 (1992-04-01), Ishiwara et al.
patent: 5151100 (1992-09-01), Abele et al.
patent: 5213097 (1993-05-01), Zeindler
patent: 5234004 (1993-08-01), Hascoet et al.
patent: 5300099 (1994-04-01), Rudie
patent: 5301687 (1994-04-01), Wong et al.
patent: 5323768 (1994-06-01), Saito et al.
patent: 5323778 (1994-06-01), Kandarpa et al.
patent: 5330518 (1994-07-01), Neilson et al.
patent: 5344398 (1994-09-01), Hara
patent: 5364392 (1994-11-01), Warner et al.
patent: 5370675 (1994-12-01), Edwards et al.
patent: 5370676 (1994-12-01), Sozanski et al.
patent: 5370677 (1994-12-01), Rudie et al.
patent: 5370678 (1994-12-01), Edwards et al.
patent: 5383917 (1995-01-01), Desai et al.
patent: 5401274 (1995-03-01), Kusunoki
patent: 5405346 (1995-04-01), Grundy et al.
patent: 5413588 (1995-05-01), Rudie et al.
patent: 5437662 (1995-08-01), Nardella
patent: 5520684 (1996-05-01), Imran
patent: B14841988 (1990-08-01), Fetter et al.
Turner, Paul F., Interstitial EM Applicator/Temperature Probes, IEEE/Eight Annual Conference of the Engineering in Medicine and Biology Society, pp. 1454-1457.
Mebust et al, Prostatic Desiccation: A Preliminary Report of Laboratory and Clinical Experience, The Journal of Urology, vol. 108, pp. 601-603.
Mendecki, et al., Microwave Applicators For Localized Hyperthermia Treatment of Malignant Tumors, Journal of Bioengineering, 1977, vol. 1, pp. 511-518.
T.C. Cetas et al., Thermometry Considerations in Localized Hyperthermia, Medical Physics, Mar./Apr. 1978, vol. 5, No. 2, pp. 79-91.
Sugaar, et al., A Histopathologic Study on the Effects of Radiofrequency Thermotherapy on Malignant Tumors of the Lung, Cancer 43:767-783, 1979.
Tabuse, A New Operative Procedure of Hepatic Surgery Using a Microwave Tissue Coagulartor, Arch Jap. Chir. 48(2), Mar. 1979, pp. 160-172.
Salles-Cunha, et al., Steady Magnetic Fields in Noninvasive Electromagnetic Flowmetry, Proceedings of the IEEE, Jan. 1980, vol. 68, No. 1, p. 149.
Magin et al., Thermal Destruction of the Canine Prostate By High Intensity Microwaves, Journal of Surgical Research, 29, pp. 265-275 (1980).
Mendecki et al., Microwave Applicators for Localized Hyperthermia Treatment of Cancer of the Prostate, Radiation Oncology Biology Physics, Nov. 1980, vol. 6, No. 11, pp. 1583-1588.
Taylor, Implantable Radiators for Cancer Therapy By Microwave Hyperthermia, Proceedings of the IEEE, Jan. 1980, vol. 68, No. 1, pp. 142-148.
Brezovich, et al., A Practical System for Clinical Radiofrequency Hyperthermia, Radiation Onocology, Biology, Physics, Mar. 1981, vol. 7, No. 3, pp. 423-430.
Sterzer, Localized Hyperthermia Treatment of Cancer, RCA Review, Dec. 1981, vol. 42, pp. 728-751.
Bahl, et al., Microstrip Loop Radiators for Medical Applications, IEEE Transactions on Microwave Theory and Techniques, Jul. 1982, vol. MTT-30, No. 7, pp. 1090-1095.
Scheiblich, et al., Radiofrequency-Induced Hyperthermia in the Prostate, Journal of Microwave Power, 1982, 17(3), pp. 203-209.
Li, et al., Design and Thermometry of an Intracavitary Microwave Applicator Suitable for Treatment of Some Vaginal and Rectal Cancers, Radiation Oncology, Biology, Physics, Nov. 1984, vol. 10, No. 11, pp. 2155-2162.
Harada, et al., Hyperthermic Treatment with Intravesical Microwave Radiation for Bladder Cancer, Nishi Nihon Urology, Jul. 1984, vol. 47, No. 4, pp. 1047-1051.
Ghods, et al., An Insulated Coaxial Probe for EM Local Heating, IEEE Transactions on Biomedical Engineering, Jun. 1985, vol. BME-32, No. 6, pp. 418-427.
Trembly, The Effects of Driving Frequency and Antenna Length on Power Deposition Within a Microwave Antenna Array Used for Hyperthermia, IEEE Transactions on Biomedical Engineering, Feb. 1985, vol. BME-32, No. 2, pp. 152-158.
Sathiaseelan, et al., Clinical Microwave Hyperthermia System with Multipoint Real-Time Thermal Dosimetry, The British Journal of Radiology, Dec. 1985, 58, pp. 1187-1195.
Harada, et al., Microwave Surgical Treatment of Diseases of Prostate, Urology, Dec. 1985, vol. XXVI, No. 6, pp. 572-576.
Turner, Interstitial Equal-Phased Arrays for EM Hyperthermia, IEEE Transactions on Microwave Theory and Techniques, May 1986, vol. MTT-34, No. 5, pp. 572-578.
Wu, et al., Performance Characteristics of a Helical Microwave Interstitial Antenna for Local Hyperthermia, Medical Physics, Mar./Apr. 1987, vol. 14, No. 2, pp. 235-237.
Leybovich et al., Intracavitary Hyperthermia: A Newly Designed Applicator for Tracheal Tumors, Endocurie Hyperthermia Oncology, Jan. 1987, vol. 3, pp. 23-29.
Torusatoh et al., Implantable Helical Coil Microwave Antenna For Interstitial Hyperthermia, Int. J. Hyperthermia, 1988, vol. 4, No. 5, pp. 497-512.
Astrahan, et al., A Technique for Combining Microwave Hyperthermia with Intraluminal Brachytherapy of the Oesophagus, Int. J. Hyperthermia, 1989, v
Carter Ryan
Jastrzab Jeffrey R.
Urologix Inc.
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