Measurement of Cardiac Output Using the Photoelectric Earpiece: A Comparison with Simultaneous Fick Measurements
- 1 July 1963
- journal article
- research article
- Published by Wolters Kluwer Health in Circulation Research
- Vol. 13 (1) , 80-85
- https://doi.org/10.1161/01.res.13.1.80
Abstract
Comparison of resting earpiece dye dilution cardiac outputs using the Cambridge Mark II amplifier-recorder with simultaneous Fick determinations has shown a satisfactory correlation in 27 patients (r =0.93). The correlation has proved to be comparable to that of cuvette densitometer-Fick studies previously reported. Modified techniques for injection of Coomassie Blue dye and calibration by the end-tail method without the need for dye extraction from the serum have simplified the procedure greatly. The Cambridge earpiece has been shown to be a reliable quantitative tool having the advantages of simplicity and ease of performance without the need of an arterial puncture, and making possible a wider usage of the technique.Keywords
This publication has 13 references indexed in Scilit:
- THE NORMAL RESTING CARDIAC OUTPUT: SERIAL DETERMINATIONS BY A DYE DILUTION METHODHeart, 1962
- THE PHOTO-ELECTRIC EARPIECE TECHNIQUE FOR RECORDING DYE DILUTION CURVESHeart, 1961
- CLINICAL APPLICATIONS OF COOMASSIE BLUEHeart, 1959
- PROPERTIES AND BIOLOGICAL BEHAVIOUR OF COOMASSIE BLUEHeart, 1959
- Cardiac Output in Normal Subjects Under Standard Basal Conditions the Repeatability of Measurements by the Fick MethodScandinavian Journal of Clinical and Laboratory Investigation, 1957
- THE EAR OXIMETER: ITS USE CLINICALLY AND IN THE DETERMINATION OF CARDIAC OUTPUTHeart, 1954
- A Photoelectric Ear Densitometer for Continuously Recording the Arterial Concentration of T-1824 in the Dye-Dilution MethodCirculation Research, 1953
- Estimation of Cardiac Output by the Dye Dilution Method With an Ear OximeterJournal of Applied Physiology, 1951
- A Device for Continuous Recording of Concentration of Evans Blue Dye in Whole Blood and its Application to Determination of Cardiac OutputJournal of Applied Physiology, 1950
- Comparison of the Fick and Hamilton Methods for the Determination of Cardiac Output in Man121Scandinavian Journal of Clinical and Laboratory Investigation, 1949