ZIB

Hits per page

hits 1 - 2 | 2 hits

Sorting

Electronic Resource

The effect of respiration on the monitoring of stroke volume and cardiac output by the electrical impedance technique (1976)

Endresen, J. ; Hill, D. W.

Springer

Intensive care medicine 2 (1976), S. 3-6

add to mindlist on the mindlist

Details

ISSN: 1432-1238

Keywords: Impedance cardiogram ; Cardiac output ; Stroke volume ; Averaging

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Notes: Abstract In six volunteers (5 male, 1 female) it has been shown that normal respiration made no statistical difference to the estimates of the mean stroke volume and the mean cardiac output as determined by the electrical impedance method of Kubiceket al, (1966). The coefficient of variation was usually increased by respiration. The use of those stroke volumes which occur only at end-expiration was not shown to yield a greater reproducibility with 3 other male volunteers. In the female subject it was found that the use of a digital averager triggered from the preceding R-wave of the ECG gave values for the mean stroke volume and cardiac output which were always lower than the conventional mean values obtained from a number of strokes. The expense of either of these approaches does not appear to be justified as a means of compensating for the effects of normal respiration on the impedance dZ/dt waveform.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00571889

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

Electronic Resource

An analogue circuit for the computation of stroke volume by the electrical impedance method (1976)

Sandman, A. M. ; Hill, D. W. ; Mable, S. E. R.

Springer

Medical & biological engineering & computing 14 (1976), S. 74-78

add to mindlist on the mindlist

Details

ISSN: 1741-0444

Keywords: Impedance cardiograph ; Analogue computer ; Stroke volume ; Cardiac output

Source: Springer Online Journal Archives 1860-2000

Topics: Biology , Chemistry and Pharmacology , Medicine

Description / Table of Contents: Sommaire L'article décrit un circuit analogue servant à mesurer les volumes de battement pour usage en conjonction avec l'e.c.g.dZ/dt et les signaux phonocardiogrammes produits par un cardiographe d'impédance IFM. L'affichage est effectué sur un cadran numérique. Ce circuit peut être étendu pour mesurer le rendement cardiaque.

Abstract: Zussammenfassung Es wird eine Analogschaltung zum Einsatz in Verbindung mit dendZ/dt-, e.k.g.-und Phonokardiogrammsignalen von einem IFM-Impedanz-Kardiographen zur Messung des Hubvolumens beschrieben. Die Anzeige erfolgt auf einem digitalen Meßgerät. Die Schaltung kann zur Messung der Herzleistung erweitert werden.

Notes: Abstract An analogue circuit is described for use in conjunction with thedZ/dt, e.c.g. and phonocardiogram signals from an IFM Impedance Cardiograph to measure stroke volume. This is displayed on a digital meter. The circuit can be extended to measure cardiac output.