Extracorporeal magnet perivascular electromagnetic flow meters

The "interrupted resonance" circuit proved effective in combination with an extracorporeal magnet in permitting electromagnetic blood flow measurements to be made in branch arteries of dogs by application of perivascular cuffs equipped with pick-up electrodes contacting the vessel wall. A...

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Bibliographic Details
Published in:Pflügers Archiv 1976-01, Vol.362 (3), p.279-283
Main Authors: Kolin, A, Steele, J R, Imai, J S, MacAlpin, R N, Coster, I R, Snow, H D
Format: Article
Language:English
Subjects:
Animals
Dogs
Electrodes
Electromagnetic Phenomena - instrumentation
Regional Blood Flow
Rheology - instrumentation
Rheology - methods
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Summary:The "interrupted resonance" circuit proved effective in combination with an extracorporeal magnet in permitting electromagnetic blood flow measurements to be made in branch arteries of dogs by application of perivascular cuffs equipped with pick-up electrodes contacting the vessel wall. A four-turn coil, acting as a transformer secondary measures the amplitude of the magnetic field component which is effective in inducing the flow signal and thus permits calibrations for arbitrary orientations of the perivascular cuff relative to the magnetic field of the extracorporeal magnet. Recordings of mean and phasic blood flow in dogs' arteries provide illustrations of effectiveness in pharmacological studies and exhibit the reliability of the non-occlusive zero-flow base line obtained by de-energizing the magnet.
ISSN:0031-6768
1432-2013
DOI:10.1007/BF00581182