Surgery – Body protecting or restraining devices for patients or infants – Restrainers and immobilizers
Patent
1990-08-16
1992-11-17
Cohen, Lee S.
Surgery
Body protecting or restraining devices for patients or infants
Restrainers and immobilizers
128402, A61N 500
Patent
active
051634465
ABSTRACT:
An electromagnetic heating device for heating a living body or an object, comprising a cavity resonator made of hollow electroconductive material for receiving a living body or an object therein and heating same by a high frequency electromagnetic field produced therein; and at least an electric field concentrator disposed in the cavity resonator separately therefrom. Thus, it is possible to concentrate an electric field to a desired location to supply a strong current into a living body or an object. Further, since the electric field concentrator is electrically out of contact with the cavity resonator, a frequency adjusting element and an impedance matching element may be easily provided in the vicinity for optimum transmission of high frequency electromagnetic energy thereby eliminating the need for adjusting the frequency of the high frequency electromagnetic energy source. Since an oscillator without the capability to change its frequency can be manufactured at a fraction of the cost for manufacturing a variable frequency oscillator, the cost of the overall heating device can be drastically reduced. By shaping the free end of the electric field concentrator, it is possible to achieve a desired degree of energy concentration.
REFERENCES:
patent: 4028518 (1977-06-01), Boudouris et al.
patent: 4660572 (1987-04-01), Maruyama et al.
Saitoh et al, "Resonant Cavity Applicator . . . ", Proc. Symp. on Hyperthermic Oncology, vol. 1, 1989, pp. 837-838.
Cohen Lee S.
Omron Corporation
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