Surgery – Truss – Pad
Patent
1985-10-30
1987-02-17
Howell, Kyle L.
Surgery
Truss
Pad
12830313, 128804, 128784, A61N 132
Patent
active
046431861
ABSTRACT:
Percutaneous transluminal electromagnetic (EM) catheter angioplasty is performed using radio frequency (RF) or microwave frequency power. The catheter includes a coaxial transmission line terminated at its distal end in an antenna. The antenna includes an extension of the coaxial center conductor past the outer conductor. A treatment includes orienting the catheter in the lumen of a cardiac artery adjacent stenotic plaque, and applying sufficient electric power to cause arcing for electroabrasion of the plaque. Another catheter includes a balloon located at the distal end of the the catheter and surrounding the antenna. In use, the balloon is pressurized so as to apply lumen-expanding force against the plaque. The antenna radiates EM energy, heating and softening the plaque, thereby allowing the plaque to be compressed and the stenotic lumen to have increased patency. In another embodiment, a portion of the interior surface of the balloon is metallized so that, when inflated, the metallized surface of the balloon coacts with the antenna to form a reflector.
REFERENCES:
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patent: 4204549 (1980-05-01), Paglione
patent: 4207874 (1980-06-01), Choy
patent: 4311154 (1982-01-01), Sterzer
patent: 4409993 (1983-10-01), Furihata
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"The Artery Zapper", Lee Discover, 12/82, pp. 36, 37 & 40.
Abstract entitled "Factors Influencing Trans-Catheter Radio-frequency Ablation of the Myocardium," by Hoit et al. appeared in Circulation magazine, vol. 72, Oct. 1975, of the American Heart Association.
Article "Medical Applications of Microwave Energy" by R. W. Paglione, published beginning at p. 170, RCA Engineer, Sep.-Oct. 1982.
Article "Session 6: Biomedical Aspects of Microwaves" mentions Microwave Catheter Angioplasty on p. 131 of the 1984 IEEE MTT-S Digest.
Article "Catheter Ablation in Dysrhythmas," by Gillette, published at pp. 67-69 of the Mar. 1984 issue of Cardio.
Article "Transvenous Catheter Ablation of a Posteroseptal Accessory Pathway in a Patient with the Wolff-Parkinson-White Syndrome," by Morady et al., published at pp. 705-707 of the Mar. 15, 1984, New England Journal of Medicine Bardex Trademark sample catalog enclosed (pp. 2,3,6 &9).
Rosen Arye
Walinsky Paul
Howell Kyle L.
Meise William H.
RCA Corporation
Shay David
Tripoli Joseph S.
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