Results 221 to 230 of about 457,113 (272)

Noninvasive Cuffless Blood Pressure Estimation Using Pulse Transit Time and Impedance Plethysmography

IEEE Transactions on Biomedical Engineering, 2019
Objective: To demonstrate the feasibility of everaging impedance plethysmography (IPG) for detection of pulse transit time (PTT) and estimation of blood pressure (BP). Methods: We first established the relationship between BP, PTT, and arterial impedance
Toan Huu Huynh, R. Jafari, W. Chung
semanticscholar   +1 more source

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

Low-Cost and Portable Impedance Plethysmography System for the Simultaneous Detection of Respiratory and Heart Activities

IEEE Sensors Journal, 2019
Impedance plethysmography is a technique that allows monitoring changes in the volume of specific tissues or organs inside the human body, through the measurement of variations in the bio-impedance between electrodes placed on the body surface.
E. Piuzzi, S. Pisa, E. Pittella, L. Podestà, S. Sangiovanni   +4 more
semanticscholar   +1 more source

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
openaire   +2 more sources

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
openaire   +2 more sources

Wrist Photo-Plethysmography and Bio-Impedance Sensor for Cuff-Less Blood Pressure Monitoring

Italian National Conference on Sensors, 2018
A multimodal wrist sensor system is proposed in this paper for a wearable reflectance photo-plethysmography (PPG) and impedance-plethysmography (IPG) biomedical data sensing.
V. P. Rachim, Toan Huu Huynh, W. Chung
semanticscholar   +1 more source

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
openaire   +1 more source

Errors in four-electrode impedance plethysmography

Medical & Biological Engineering & Computing, 1983
The errors in electrical impedance plethysmography are not well known. In the paper errors due to inadequate instrumentation, improper electrode application, and physiological changes have been analysed. Minimum electrical requirements for a general purpose four-electrode instrument are: (a) input impedance of voltage-sensing circuit+4 kΩ; (b) output ...
D K, Swanson, J G, Webster
openaire   +2 more sources

Foot-to-Foot Bioelectrical Impedance, Air Displacement Plethysmography, and Dual Energy X-ray Absorptiometry in Resistance-Trained Men and Women

International Journal of Exercise Science, 2018
International Journal of Exercise Science 11(4): 1145-1155, 2018. Accurate assessment of body composition is important to athletic performance goal setting and nutritional program design.
J. Merrigan, S. Gallo, J. Fields, Margaret T. Jones   +3 more
semanticscholar   +1 more source

Positional Factors in Venous Impedance Plethysmography

Archives of Surgery, 1973
To 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, J R, Dmochowski, N P, Couch   +2 more
openaire   +2 more sources