Results 141 to 150 of about 3,523 (166)
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The Validity of Strain Gauge Plethysmography
Scandinavian Journal of Clinical and Laboratory Investigation, 1972A unique possibility of testing the validity of the strain gauge plethysmograph was found in regional perfusion of the human limb. It was possible to vary the inflow of the limb and at the same time record the peripheral flow with a strain gauge plethysmograph on the calf.
N. Englund, L. G. Ling, T. Hallböök
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Renal admittance plethysmography
Proceedings of the 1988 Fourteenth Annual Northeast Bioengineering Conference, 2003It is shown that over a wide flow range, phasic changes in renal volume and the maximum rate of volume change may be reasonably predicted from changes in renal conductance using a model which assumes homogeneous geometric changes. However, the relationship deteriorates at high pump rates, stroke volumes, and therefore mean flow values.
L.A. Marks, D. Anaise, M. Yland
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Acta Clinica Belgica, 1964
SummaryBy means of a very simple apparatus, the pulse wave velocity in upper and lower extremities of man, as well as the crest time and the inclination time of the pulse waves in fingers and toes, has been measured. Normal values were established and the influence of age demonstrated.In patients with clinical signs of arteriopathy, the pulse wave ...
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SummaryBy means of a very simple apparatus, the pulse wave velocity in upper and lower extremities of man, as well as the crest time and the inclination time of the pulse waves in fingers and toes, has been measured. Normal values were established and the influence of age demonstrated.In patients with clinical signs of arteriopathy, the pulse wave ...
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Development of multielectrode impedance plethysmography
Medical & Biological Engineering & Computing, 1986The feasibility of simultaneous independent measurements of impedance variations in the right and left apex and base of the lungs using the technique of multielectrode impedance plethysmography (MIPG) was investigated. To obtain independent impedance measurements in each region, high impedance sensitivity areas must be localised by weighting the ...
N Furuya, K. Nakayama
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Air Displacement Plethysmography
Nutrition in Clinical Practice, 2015Differences in body composition are associated with increased disease risk in various stages of life. Despite numerous available methods in assessing body composition (air displacement plethysmography, dual‐energy X‐ray absorptiometry, bioelectrical impedance, hydrometry, and magnetic resonance imaging), due to innate technical limitations, the ability
Ravindu Gunatilake +2 more
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Electrical Impedance Plethysmography
Archives of Internal Medicine, 1962Plethysmography has proven to be a valuable method for studying the dynamics of peripheral vascular beds in normal and pathologic states and for evaluating the effects of drugs upon these beds. Refinements of the method, such as graded outflow hindrance and stopflow studies, have permitted separation of the pulsatile arterial inflow and venous runoff ...
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A theoretical study of capacitive plethysmography
Medical & Biological Engineering, 1971A theoretical analysis of capacitive plethysmography is given which is more accurate than that from a previous study due to a more exact mathematical approach. As a result, it is shown that capacitive plethysmography can, under certain circumstances, be quite inaccurate.
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Respiratory Inductive Plethysmography
1991In 1977, at the International Symposium of Ambulatory Monitoring, Cohn et al. [1] presented a new transducer for non-invasive monitoring of respiration: the respiratory inductive Plethysmograph (RIP), consisting essentially of two coils, one wrapped around the chest and the other around the abdomen.
J. DalľAva-Santucci, A. Armanganidis
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Plethysmography as an Objective Method of Audiometry
Acta Oto-Laryngologica, 1976In 37 subjects with normal hearing acuity and normal cardiovascular system, vasomotor reactions to sounds of 1024, 2048, and 4096 Hz frequency and 0, 10, 20, 60 and 80 dB intensity above the hearing threshold determined were studied subjectively. Pure sounds evoked in all persons plethysmographic reactions not subject to extinction under the conditions
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Magnetic-susceptibility plethysmography
Il Nuovo Cimento D, 1983Magnetic-susceptibility plethysmography (MSPG) is a new method proposed for monitoring cardiac-volume changes. The measurement principle and recent work by other investigators are reviewed. The effect of the cardiac-related motion of the anterior chest wall on the MSPG signal is studied.
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