The Validity of a Photoconductive-cell Densitometer for Recording Dye Dilution Curves
نویسندگان
چکیده
منابع مشابه
A photoelectric ear densitometer for continuously recording the arterial concentration of T-1824 in the dye-dilution method.
To eliminate the collection of serial samples of arterial blood an instrument has been developed which records dye-dilution curves by measuring changes in optical density of a segment of a heatflushed ear. Comparison with curves from arterial samples shows close similarity in the shape of the curves, and good agreement between the cardiac outputs calculated from them. Other advantages of the te...
متن کاملAmplifier for linear recording of oxygen saturation and dye dilution curves.
An amplifier system has been designed for use with commercially available oximeter earpiece or cuvette and a direct recording oscillograph. Linear response to changes in oxygen saturation and in vivo dye concentrations are obtained with a rise time less than 0.5 sec., noise level and drift less than 2.5 per cent and accuracy comparable to Van Slyke-Neill method. Standard error of estimate betwe...
متن کاملThe use of indigo carmine for dye dilution curves.
Investigation of the properties of indigo carmine reveals that it may be more suitable than the dye, T-1824, for circulator}' studies that are now commonly carried out using the dye dilution principle of Stewart and Hamilton. Comparison is made of simultaneous dilution curves of indigo carmine and radioactive iodinated serum albumin. Apparently, indigo carmine is bound to protein firmly enough ...
متن کاملA sensitive and stable earpiece for dye dilution curves.
The measurement of cardiac output, from the study of the concentration of a circulating dye against time, has in the past been most commonly carried out using whole blood cuvettes (Fried-At a wavelength of 640 millimicrons the density of arterial blood flowing at a constant rate between the photo-cells and light source is continuously recorded, and the curve calibrated for dye concentration by ...
متن کاملDye dilution curves in congenital heart disease.
The need for methods capable of detecting and estimating roughly the size of congenital cardiac defects has increased with the recent rapid developments in cardiac surgery. The application of dye dilution technique to the study of these patients is largely due to the extensive work of Wood and his colleagues at the Mayo Clinic since 1950. However, although the development of these techniques re...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Tohoku Journal of Experimental Medicine
سال: 1963
ISSN: 0040-8727,1349-3329
DOI: 10.1620/tjem.80.338