Results 181 to 190 of about 4,597 (239)

Impedance plethysmography

Equine Veterinary Journal, 1990
Summary The technique of impedance plethysmography is described and its application to observation of lung volume changes in the horse at exercise is discussed. The results from horse at rest show that there is a close relationship between rate of lung volume change (flow rate) and the associated impedance changes during both ...
D P, Attenburrow, F C, Flack, M J, Portergill   +2 more
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Development of multielectrode impedance plethysmography

Medical & Biological Engineering & Computing, 1986
The 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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Comparison of electrical field plethysmography with electrical impedance plethysmography

Annals of Biomedical Engineering, 1982
As a means for assessing cardiac function, electrical field plethysmography (EFP) has been shown to have some features quite different from electrical impedance plethysmography (EIP). Here the two techniques are compared by using the two systems simultaneously on a subject and also with independent use in different electrode configurations. The results
S K, Guha, S, Anand
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Differential impedance plethysmography for measuring thoracic impedances

Medical & Biological Engineering & Computing, 1982
A critical evaluation of the measurement of the transthoracic basic impedance Zo according to Kubicek's method revealed inhomogeneous electrical field-distributions in the region of the neck and the shoulders and in the region of the mammae in female subjects. These inhornogeneties were found to introduce uncontrollable errors, like position dependency
J H, Meijer, J P, Reulen, P L, Oe, W, Allon, L G, Thijs, H, Schneider   +5 more
openaire   +2 more sources

Features of Pulse Plethysmography and a Comparison with Impedance Plethysmography

Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 1992
The features of current pulse plethysmography are given. The skin capacitance and resistance are depending upon pulse duration but not the internal resistance. The internal resistance changes depend of arteries volume changes. A comparison between pulsed plethysmography and sine-wave plethysmography is discussed.
null Santic, null Saban
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Meaning of Impedance Plethysmography

Nature, 1967
IMPEDANCE plethysmography is a method of measuring the resistive impedance of a limb segment. Nyboer1 pointed out that the resistive impedance variation ΔR during the heart cycle is proportional to the blood volume ΔV transiently stored in the segment where ρ is the blood ...
U. BECATTINI, M. DELLA CORTE
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Impedance Plethysmography: Correlation with Contrast Venography

Radiology, 1977
Impedance plethysmography is a noninvasive, indirect test for deep venous occlusion in the lower limbs. The results of ascending contrast venography impedance plethysmography have been compared in 315 limbs. Impedance plethysmography was positive in 77 of 79 limbs with acute deep vein thrombosis proximal to the calf.
K T, Benedict, H B, Wheeler, N A, Patwardhan   +2 more
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IMPEDANCE PLETHYSMOGRAPHY IN STUDY OF PERIPHERAL CIRCULATION

Archives of Surgery, 1952
DIGITAL pulse volume studies have proved of great value in the study of the peripheral circulation. The methods most commonly used have the disadvantage that they necessitate placing the digit in an airtight or watertight cylindrical compartment. In most of them the tracings are recorded on photographic paper, and analysis of data must wait until the ...
W S, COXE, H B, SHUMACKER, L W, FREEMAN
openaire   +2 more sources