| 摘要 |
PROBLEM TO BE SOLVED: To provide a highly functional and practical implant in which a problem in which a minute implant does not conventionally generate enough heat is improved and an electromagnetic field measuring function is added. SOLUTION: The implant in which a resonance circuit is constituted of a coil 1 and a capacitor 2 and coil electric current is efficiently energized by magnetic field irradiation of a definite frequency and heat is highly efficiently generated by optimization of crosssectional diameter of a coil wire material is constituted. A non- magnetic material is used as a coil material and stable resonance characteristics are relatively easily kept by the irradiated magnetic field to ensure high heat generation and reproducibility. By setting a circuit element so as to change circuit constants of the capacitor, etc., with temperature, a problem on controlling temperature for holding specified temperature characteristics is solved. Electromagnetic strength of the irradiated electromagnetic field is detected by a micro-sensor of an IC level by paying attention to a property that oscillating frequency of an IC oscillator linearly changes depending to bias value to solve a problem for application to fields of medical care instruments and environmental electromagnetic engineering wherein minute sensors are required. It is also applied to a stent and the stent is made to be functional. |
