A system for intravascular, radially orientation-independent electromagnetic flow- and diameter-sensing
- 1 January 1977
- journal article
- research article
- Published by Springer Nature in Pflügers Archiv - European Journal of Physiology
- Vol. 372 (1), 109-111
- https://doi.org/10.1007/bf00582215
Abstract
The difficulty of optimally orienting an intravascular loop probe of an extracorporeal field electromagnetic flow meter is circumvented by uniting 2 mutually perpendicular loop sensors into a single flow-diameter probe. When one of the loops is unfavorably oriented in the magnetic field, the orientations of the other loop is more favorable. The most unfavorable case is a 45° angle between the magnetic field and the planes of the loops, when the signal drops to 70.7% of the optimal value. By taking the square root of the sum of the squares of the 2 loop transducer signals, one obtains an output for flow and diameter measurements which is independent of the probe orientation. This operation can be accomplished electronically.Keywords
This publication has 6 references indexed in Scilit:
- Electromagnetic rheoangiometry: an extension of selective angiographyAmerican Journal of Roentgenology, 1978
- INDUCTION ANGIOMETER - ELECTROMAGNETIC MAGNIFICATION OF MICROSCOPIC VASCULAR DIAMETER VARIATIONS INVIVO1977
- The external field intravascular electromagnetic flowmeter system as applied to standard arteriographic catheters and conscious humansCatheterization and Cardiovascular Diagnosis, 1976
- A Constant-Field Interrupted Resonance System for Percutaneous Electromagnetic Measurement of Blood FlowProceedings of the National Academy of Sciences, 1974
- External field electromagnetic measurement of blood flowPflügers Archiv - European Journal of Physiology, 1972
- A New Approach to Electromagnetic Blood Flow Determination by Means of Catheter in an External Magnetic FieldProceedings of the National Academy of Sciences, 1970