Results 191 to 200 of about 9,518 (237)
Some of the next articles are maybe not open access.
Meaning of Impedance Plethysmography
Nature, 1967IMPEDANCE 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
openaire +1 more source
Impedance Plethysmography: Correlation with Contrast Venography
Radiology, 1977Impedance 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 +2 more
openaire +2 more sources
IMPEDANCE PLETHYSMOGRAPHY IN STUDY OF PERIPHERAL CIRCULATION
Archives of Surgery, 1952DIGITAL 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
Plastic and Reconstructive Surgery, 1991
Vigilant postoperative monitoring of the buried muscle flap is critical after free transfer because early diagnosis of vascular insufficiency is essential to allow prompt correction. We have identified a monitoring method utilizing needle electrodes and impedance plethysmography that gives a beat-to-beat representation of muscular perfusion.
M J, Concannon +3 more
openaire +2 more sources
Vigilant postoperative monitoring of the buried muscle flap is critical after free transfer because early diagnosis of vascular insufficiency is essential to allow prompt correction. We have identified a monitoring method utilizing needle electrodes and impedance plethysmography that gives a beat-to-beat representation of muscular perfusion.
M J, Concannon +3 more
openaire +2 more sources
Impedance plethysmography on the arms: Respiration monitoring
2010 IEEE International Conference on Bioinformatics and Biomedicine Workshops (BIBMW), 2010A new method for extracting respiratory rate from electrical impedance measured on the arms is presented. The method requires application of only four electrodes to the subject's arms and is suitable to be used in a portable respiratory rate monitor and decision making systems. Set-Membership filtering is used to reduce the effect of motion artifact on
Sardar Ansari +3 more
openaire +1 more source
Positional Factors in Venous Impedance Plethysmography
Archives of Surgery, 1973To determine whether leg position or distance between the inner electrodes affect the magnitude of impedance change during deep inspiration, 30 adult patients (60 limbs) were studied with the Minnesota Impedance Cardiograph. Phlebography was performed in 19 limbs and correlated with the impedance findings.
F E, Deuvaert +2 more
openaire +2 more sources
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 ...
openaire +1 more source
Advances in intracardiac impedance Plethysmography
[1990] Proceedings of the Twelfth Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2005Intracardiac impedance measurements in conjunction with microprocessor controlled signal processing and lead technology provide a great variety of practical applications, particularly for physiologic control of the pacing rate of implantable pulse generators.
M. Schaldach, W. Rentsch, H.W. Rentsch
openaire +1 more source
Intracardiac Impedance Plethysmography
American Journal of Physiology-Legacy Content, 1953R F, RUSHMER +3 more
openaire +2 more sources