Cardiac output determinations by the dye-dilution method in Squalus acanthias

1965 ◽  
Vol 209 (4) ◽  
pp. 723-726 ◽  
Author(s):  
H. Victor Murdaugh ◽  
Eugene D. Robin ◽  
J. Eugene Millen ◽  
William F. Drewry
Keyword(s):  
Cardiac Output ◽  
Cardiac Index ◽  
Squalus Acanthias ◽  
Physiological Status ◽  
Dilution Method ◽  
Small Fish ◽  
Large Fish ◽  
Dilution Technique ◽  
Dye Dilution ◽  
Cardiac Output Measurements

A dye-dilution technique has been adapted for the measurement of cardiac output in the elasmobranch, Squalus acanthias. Cardiac output averaged 1.60 ± 1.00 liter/kg per hr in 26 fish. Small fish showed a relatively high cardiac index (liters/kg per hr) as compared with large fish. The use of this technique permits sequential cardiac output measurements with the maintenance of an intact physiological status. This technique should permit quantitation of exchange of a variety of substances across the gill membranes.

Thermodilution method overestimates low cardiac output in humans

1983 ◽  
Vol 245 (4) ◽  
pp. H690-H692 ◽  
Author(s):  
A. van Grondelle ◽  
R. V. Ditchey ◽  
B. M. Groves ◽  
W. W. Wagner ◽  
J. T. Reeves
Keyword(s):  
Cardiac Output ◽  
Heat Loss ◽  
Low Flow ◽  
Clinical Implications ◽  
Low Cardiac Output ◽  
Dye Dilution ◽  
Thermodilution Method ◽  
Cardiac Output Measurements

We compared 57 cardiac output measurements by the thermodilution and Fick methods in 26 patients and found that thermodilution values were higher in all 16 cases in which Fick outputs were less than 3.5 l/min. In 10 cases where Fick values were less than or equal to 2.5 l/min, thermodilution and Fick measurements differed by an average of 35%. When combined with the results of previous studies comparing the thermodilution, dye dilution, and Fick techniques, these findings suggest that the thermodilution method overestimates true cardiac output in the low output range. This overestimation probably is due to heat loss under conditions of low flow. Because the thermodilution method is used widely in patients with low output states, these findings have potentially important clinical implications.

Cardiac output in the exercising dog: An evaluation of the dye-dilution method using the electromagnetic flowmeter as a standard

1970 ◽  
Vol 10 (1) ◽  
pp. 25-32 ◽  
Author(s):  
Rae R. Jacobs ◽  
William C. Heyden ◽  
Bryn T. Williams ◽  
Ursula T. Schmitz ◽  
Worthington G. Schenk
Keyword(s):  
Cardiac Output ◽  
Electromagnetic Flowmeter ◽  
Dilution Method ◽  
Dye Dilution

scholarly journals CARDIAC OUTPUT IN NORMAL MEN DURING STEADY-STATE EXERCISE UTILIZING DYE-DILUTION TECHNIQUE

Heart ◽  
1961 ◽  
Vol 23 (4) ◽  
pp. 425-432 ◽  
Author(s):  
A. M. Levy ◽  
B. S. Tabakin ◽  
J. S. Hanson
Keyword(s):  
Cardiac Output ◽  
Steady State ◽  
Dilution Technique ◽  
Dye Dilution ◽  
Normal Men

Simultaneous and rapidly repeated cardiac output determinations by dye-dilution method

1964 ◽  
Vol 19 (2) ◽  
pp. 275-278 ◽  
Author(s):  
John S. Hanson ◽  
Burton S. Tabakin
Keyword(s):  
Cardiac Output ◽  
Radial Artery ◽  
Treadmill Exercise ◽  
Sampling Site ◽  
Normal Subjects ◽  
Repeated Measurements ◽  
Peak Exercise ◽  
Dilution Method ◽  
Dye Dilution ◽  
The Difference

Reproducibility of cardiac output determinations by dye dilution at rest and during graded treadmill exercise has been assessed by means of simultaneous, rapidly repeated measurements with two Waters 250-A densitometers at both a single sampling site and from both arms. A total of 232 paired-dilution curves was recorded from 10 normal subjects with both densitometers sampling from the same radial artery, and 158 curves from 9 subjects, one densitometer sampling each radial artery simultaneously. Measurements were made with subjects recumbent and during walking varying from level to a 12° treadmill elevation. With both densitometers sampling the same arterial stream cardiac output variation from the two instruments progressively increased from 7% (0.562 liter/min) at rest to 11% (2.773 liter/min) at peak exercise as represented by a standard deviation of the difference related to mean cardiac output. When two arterial streams were being sampled for each injection, variation between instruments amounted to 9–12% of mean cardiac output. Significantly greater variation was observed in curves obtained within 1 min of each other from the same densitometer. measurement of cardiac output during exercise; cardiac output technique; variation in dye-dilution technique; bilateral cardiac output measurements; upright treadmill exercise Submitted on July 12, 1963

scholarly journals THE NORMAL RESTING CARDIAC OUTPUT: SERIAL DETERMINATIONS BY A DYE DILUTION METHOD

Heart ◽  
1962 ◽  
Vol 24 (1) ◽  
pp. 69-75 ◽  
Author(s):  
T. A. Bruce ◽  
J. P. Shillingford
Keyword(s):  
Cardiac Output ◽  
Dilution Method ◽  
Dye Dilution

An Improved Cuvette Densitometer for Cardiac Output Determination by the Dye‐Dilution Method

1953 ◽  
Vol 24 (8) ◽  
pp. 696-702 ◽  
Author(s):  
S. R. Gilford ◽  
D. E. Gregg ◽  
O. W. Shadle ◽  
T. B. Ferguson ◽  
L. A. Marzetta
Keyword(s):  
Cardiac Output ◽  
Dilution Method ◽  
Dye Dilution ◽  
Cardiac Output Determination
Sign in / Sign up

Export Citation Format

Share Document