Surgery – Diagnostic testing – Cardiovascular
Patent
1997-08-14
1999-08-10
Jastrzab, Jeffrey R.
Surgery
Diagnostic testing
Cardiovascular
7386112, A61B 502
Patent
active
059350776
ABSTRACT:
An improved electromagnetic blood flow sensor uses a bipolar magnetic field source to provide a varying magnetic field with a component parallel to the skin and through the blood vessel, a single sense electrode on the skin adjacent to the blood vessel, a reference electrode, and a detector that samples the sense electrode signal in synchronism to the varying magnetic field. An optional addition is a driven shield for the sense electrode to reduce the effect of noise voltages either from the magnetic field source or from stray fields.
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Hiroshi Kanai, Eiki Yamano, Kiyoshi Nakayama,Naoshige Kawamura, and Hiroshi Furuhata; IEEE Transactions on Biomedical Engineering, vol. BME-21, No. 2, Mar. 1974; Transcutaneous Blood Flow Measurement by Electromagnetic Induction; Mar. 01, 1974; 8 pgs.
Carter Ryan
Jastrzab Jeffrey R.
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