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(1964)
Calibration of the mercury strain gauge" Air force technical report
T. Hallböök, B. Månsson, R. Nilsén (1970)
A strain gauge plethysmograph with electrical calibration.Scandinavian journal of clinical and laboratory investigation, 25 4
N. Lassen, E. Tvedegaard, F. Jeppesen, Nielsen Pe, G. Bell, J. Gundersen (1972)
Distal Blood Pressure Measurement in Occlusive Arterial Disease, Strain Gauge Compared To Xenon-133Angiology, 23
R. Whitney (1953)
The measurement of volume changes in human limbsThe Journal of Physiology, 121
T. Needham (1972)
The measurement of blood flow: strain gauge plethysmography.Biomedical engineering, 7 6
(1964)
J . " Calibration of the mercury strain gauge " Air force technical report AAL - TDR 64 - 7 ,
J. Longhurst, R. Capone, D. Mason, R. Zelis (1974)
Comparison of Blood Flow Measured by Plethysmograph and Flowmeter During Steady State Forearm ExerciseCirculation, 49
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Strain-gauge plethysmography; theoretical and practical notes on a new design.Journal of applied physiology, 21 2
(1970)
and N ssen R . , " A strain gauge plethysmograph with electrical calibration " Scand
D. Hokanson, David Sumner, D. Strandness (1975)
An Electrically Calibrated Plethysmograph for Direct Measurement of Limb Blood FlowIEEE Transactions on Biomedical Engineering, BME-22
B. Michaux, J.J. Vanhoutte, M.Y. Jaffrin, G. Fontenier Departement Genie Biologique, Universite de Technologie de Compiegne/France Mercury strain gauge plethysmography has first been described by Whitney in 1953 (1) in order to assess blood f low in the linibs. It is an attractive method because it is external, simple and can be used on fingers s well s limbs. This method has been widely used in measurement o£ flow (1,2,5,9,11), systolic (6,8), diastolic and venous pressure (8). The results seem to be in good agreement with various others methods (6,7,9). A silastic capillary filled with mercury is attached around the limb. The diange in girth of the limb induces a change o£ the resistarce of the mercury column dR/R = 2 dL/L (R and L being the resistance of the gauge and the girth of the limb) For isotropic radial dilatations dS = 2 dL/L = dR/R where S is the local sectional area of the limb. It is then necessary to measure simultaneously R and dR, in order to eompute dL. The girth L can be measured directly. The mercury strain gauge plethysmographs generally use the Wheatstone bridge technique, either using direct current (1,11) or alternating current
Biomedizinische Technik / Biomedical Engineering – de Gruyter
Published: Jan 1, 1976
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