TITLE

SOME BASIC DEFICIENCIES OF THE PLETHYSMOGRAPHIC METHOD AND POSSIBILITIES OF AVOIDING THEM

AUTHOR(S)
Figar, Š.
PUB. DATE
April 1959
SOURCE
Angiology;Apr1959, Vol. 10 Issue 2, p120
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
1. The author discusses some fundamental deficiencies of photoelectric and electrical plethysmography from the aspect of quantitative registration. He also deals with drawbacks of mechanical plethysmography related to the need for confining the organs under investigation in a sealed chamber, with all the ensuing consequences like heat and pressure influences, and to insufficient regard for maintaining isotonic conditions in the plethysmographic system. 2. An improved modification of a mechanical water plethysmograph with linear ink recording is described. The tension of the recording membrane remains constant throughout the whole extent of the volume changes and thus ensures isotonic conditions in the plethysmographic system. The inkwriters are simple and give a good recording. 3. A description is given of a principle termed ‘electrocapacitive plethysmography,’ by which volume changes in the organ under investigation are recorded directly as capacitance changes, without using pneumatic transmission with a pressure capacitance transducer. This dispenses with the need for enclosing the organ in a confined space, and measuring is carried out under physiologic conditions, i.e., without being influenced by temperature or pressure.
ACCESSION #
16399364

 

Related Articles

  • Measurement of Arterial and Venous Reactivity by an Advanced Strain Gauge Plethysmograph. Hellige, Gerhard; Baller, Ensink D.; Prennsch�tz-Sch�tzenau, H.; Sigmund-Duchanova, H.; Zipfel, J. // Angiology;Aug1979, Vol. 30 Issue 8, p539 

    The problems of applying mercury strain gauge venous occlusion plethysmography in quantitative measurements of high blood flow rates were studied in the extremities of humans and animals. The fast-acting ECG-controlled pneumatic Periflow system opens the possibility of measurements with reduced...

  • Evaluation of Breathing Pattern: Comparison of a Manual Assessment of Respiratory Motion (MARM) and Respiratory Induction Plethysmography. Courtney, Rosalba; Van Dixhoorn, Jan; Cohen, Marc // Applied Psychophysiology & Biofeedback;Jun2008, Vol. 33 Issue 2, p91 

    Altered breathing pattern is an aspect of dysfunctional breathing but few standardised techniques exist to evaluate it. This study investigates a technique for evaluating and quantifying breathing pattern, called the Manual Assessment of Respiratory Motion (MARM) and compares it to measures...

  • Diagnostic Accuracy of Computerized Impedance Plethysmography in the Diagnosis of Symptomatic Deep Vein Thrombosis: A Controlled Venographic Study. Agnelli, Giancarlo; Longetti, Mauro; Cosmi, Benilde; Lupattelli, Luciano; Barzi, Francesco; Levi, Marcel; Nenci, Giuseppe O. // Angiology;Jul1990, Vol. 41 Issue 7, p559 

    The aim of our study was to evaluate the sensitivity, the specificity, and the positive and negative predictive values of a recently developed computerized impedance plethysmography (CIP) in the diagnosis of deep vein thrombosis (DVT); 117 consecutive outpatients with a clinical suspicion of DVT...

  • FUNCTIONAL SEGMENTAL PLETHYSMOGRAPHY. Sakaguchi, Shukichi; Tomita, Tohji; Endo, Iwao; Ishitori, Kozo // Angiology;Dec1970, Vol. 21 Issue 11, p714 

    The clinical results from the application of functional segmental plethysmography with air cuff, deviced by us, were described. 1. From the results obtained in examined 53 normal limbs, normal values of each venous function of the lower extremities were determined and physiological volume...

  • Pharmacologic Vasodilation. Spáčil, J.; Linhart, J. // Angiology;Apr1980, Vol. 31 Issue 4, p254 

    The article discusses a clinical case of pharmacologic vasodilation. Prolonged measurement of foot blood flow with the mechanical plethysmograph filled with air or water may be inconvenient to some patients. Since the present study required flow measurements over a period of 4 hours, it was...

  • Validation of air-displacement plethysmography for estimation of body fat mass in healthy elderly subjects. Bosy-Westphal, A.; Mast, M.; Eichhorn, C.; Becker, C.; Kutzner, D.; Heller, M.; Muller, M. J. // European Journal of Nutrition;2003, Vol. 42 Issue 4, p207 

    Background Air-displacement plethysmography (ADP) is a non-invasive method for body composition analysis that divides the body into fat-free mass (FFM) and fat mass (FM) (= 2 compartment model, 2C). It places low de mands on subject performance and is therefore most convenient in the elderly....

  • Reliability of Infrared Plethysmography in BVP Biofeedback Therapy and the Relevance for Clinical Application. Speckenbach, U.; Gerber, W. D. // Applied Psychophysiology & Biofeedback;Dec99, Vol. 24 Issue 4, p261 

    Biofeedback methods are well established as behavioral techniques for the therapy of various psychophysiological diseases. The forms of feedback generally employed are muscle activity (electromyogram), skin temperature, brain activity (electroencephalogram), and vasomotoricity. The latter...

  • PLETHYSMOGRAPHY  // Davis's Comprehensive Handbook of Laboratory & Diagnostic Tests ;Jan2006, p1041 

    Plethysmography is a noninvasive diagnostic manometric study used to measure changes in the size of blood vessels by determining volume changes in the blood vessels of the eye, extremities, and neck; or to measure gas volume changes in the lungs.IArterial plethysmographyi assesses arterial...

  • PLETHYSMOGRAPHY. Schnell, Zoanne Burgess; Van Leeuwen, Anne M.; Kranpitz, Todd R. // Davis's Comprehensive Handbook of Laboratory & Diagnostic Tests ;Jan2003, p789 

    Presents a comprehensive guide to plethysmography, a noninvasive diagnostic manometric study used to measure changes in the size of blood vessels by determining volume changes in the blood vessels of the eye, extremities and neck, or gas volume changes in the lungs. Kinds of plethysmography;...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics