Surgery – Body protecting or restraining devices for patients or infants – Restrainers and immobilizers
Patent
1983-05-31
1986-07-15
Cohen, Lee S.
Surgery
Body protecting or restraining devices for patients or infants
Restrainers and immobilizers
343787, 343700MS, A61N 500
Patent
active
046000186
ABSTRACT:
An electromagnetic medical applicator for tissue-heating comprises a single resonant element (1) in contact with one surface of a layer of material (5) whose opposite surface faces the body of a patient (6). The material has a wave-impedance which approximately matches that of the human body and a dielectric constant not less than for a material having unity magnetic permeability which produces this match. In one form the element is a patch resonator (1) on a substrate (2) backed by a ground-plane (3) and overlaid by the layer (5); at least the substrate may include both dielectric and magnetic material in order to combine a desired resonator size-reduction and wave-impedance. In another form a needle-type applicator is coated with the layer of material.
REFERENCES:
patent: 2814298 (1957-11-01), Argento
patent: 3077195 (1963-02-01), Folsche
patent: 3811128 (1974-05-01), Munson
patent: 4240445 (1980-12-01), Iskander et al.
patent: 4312364 (1982-01-01), Convert et al.
Bahl et al., "Microstrip Loop Radiators . . . ", Conf: 1981 IEEE MTT.S Int. Microwave Symp. Dig., Los Angeles, Ca. pp. 465-467 (Jun. 15-19, 1981).
Bahl et al., "A New Microstrip Radiator . . . ", IEEE Trans. on MTT, vol-MTT-28, No. 12, Dec. 1980, pp. 1464-1468.
Henderson Ann
James James R.
Johnson Reginald H.
Ponting Mary H.
Cohen Lee S.
Hinds William R.
National Research Development Corporation
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