Magnetic detection of physiopathological parameters

Details Magnetic detection of physiopathological parameters Magnetic detection of physiopathological parameters

A - Human Necessities

61

B

326/12.6

A61B 5/03 (2006.01) G01L 9/14 (2006.01)

Patent

CA 1254951

ABSTRACT A technique particularly for measuring intracranial pressure involves implanting in the patient's head a device that generates a magnetic field having an orientation influenced by changes in the intracranial pressure and detecting externally the orientation of the field. In preferred embodiments, the field is generated by one or more permanent magnets in the implanted device; the orientation of the field is detected externally using a viewer that provides a display indicative of the orientation; the display either provides directly an image of the magnetic field (e.g., using a suspension of weakly-ferromagnetic crystals) or it consists of a magnetic element (e.g., a compass needle or magne- tometer) that aligns itself with the field in a known manner; the magnetic field is generated by a rotatable element on which are carried one or more permanent magnets (e.g., a disk of a magnetic alloy such as samarium cobalt on which has been impressed one or more magnetic regions).

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