Results 261 to 270 of about 15,598 (296)
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A new sensitive portable plethysmograph
American Heart Journal, 1947Abstract A new portable plethysmograph is described which is all metal and, therefore, sturdy and free from the difficulties of deterioration—an important problem when rubber membranes are employed. A device for standardization is incorporated which makes it possible to correct for finger and toe size, thereby resulting in a completed plethysmogram ...
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Design of a body plethysmograph for studying cardiopulmonary physiology.
Journal of applied physiology, 1959A body plethysmograph may be used for the measurement in man of thoracic gas volume, airway resistance, instantaneous pulmonary capillary flow and abdominal gas volume; if functional residual capacity (dilution method) and pulmonary resistance ...
J. H. Comroe, S. Botelho, A. Dubois
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A strain gauge plethysmograph with electrical calibration.
Scandinavian Journal of Clinical and Laboratory Investigation, 1970A strain gauge plethysmograph device with a DC bridge supplied from a constant current source is described. The theoretical advantage of using a constant current source is discussed.
T. Hallböök, B. Månsson, R. Nilsén
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Design of an inductive plethysmograph for ventilation measurement.
Physiological Measurement, 1994We have designed an inductive plethysmograph to obtain a non-invasive measure of ventilation. Two elastic bands containing insulated wires encircle the chest and abdomen--the inductance of each band depends on the enclosed cross sectional area.
K. P. Cohen +4 more
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A plethysmograph for the measurement of digital blood flow
Journal of Medical Engineering & Technology, 1986Venous occlusion plethysmography using a water-filled plethysmograph is an accurate and reliable method for the measurement of limb flow which has been used for many years. The technique has been adapted to produce a plethysmograph for the measurement of digital blood flow.
J A Allen, S McGrann, S T Irwin
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Analysis and characterization of photo-plethysmographic signal
IEEE Transactions on Biomedical Engineering, 2001Qualitative assessment of the overall clinical status of the subject and characterization of complex cardiovascular dynamics from digital blood volume pulsations measured noninvasively using a photo-plethysmographic device is addressed. A novel concept is employed to detect the dominant nonsinusoidal periodicity embedded in the data series and to ...
P.P. Kanjilal +2 more
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Comparison of plethysmographic and electromagnetic flow measurements
Physics in Medicine & Biology, 1973The influence of plethysmographic congesting pressures on blood flow has been studied in anaesthetized mongrel dogs and primates. The flow was measured simultaneously with a plethysmograph and with an electromagnetic flowmeter and the results are compared with electromagnetic measurements just before occlusion.
E R, Raman, V J, Vanhuyse, A H, Jageneau
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The pulse oximetry plethysmographic curve revisited
Current Opinion in Critical Care, 2008To evaluate the recent literature on the utility of the pulse oximetry plethysmographic curve to assess macrocirculation and microcirculation monitoring in intensive care patients.In patients with sinus rhythm who are hypotensive, deeply sedated, mechanically ventilated, critically ill and in the operation room, plethysmographic pulse variation related
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Plethysmographic Techniques in the Diagnosis of Venous Disease
2012Various techniques of plethysmography have been developed to evaluate venous function in the lower extremity. They have been extensively investigated, but have been replaced with color duplex scanning for the anatomic examination of the deep and superficial venous systems. In the current management of venous disease, plethysmography is useful to assist
William A. Marston, Shadi Abu-Halimah
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Neurology, 1964