Automated multi-point blood volume analyzer.

摘要

In a multi-point method of determining a human time-zero blood volume a radioactive tracer is injected into the blood stream, and a plurality of mixed samples of blood and tracer are removed from the blood stream at a corresponding plurality of measured time intervals subsequent to the injecting step; a blood portion volume corresponding to each time interval is automatically determined from the diluted tracer level in the mixed samples, and a time-zero blood portion volume is automatically calculated from the determined blood portion volumes and time intervals. An analyzer for the method includes a sample holder for receiving the samples, means for automatically determining from levels of the tracer in the mixed samples a blood portion volume corresponding to each time interval, and means for automatically calculating therefrom the time-zero blood portion volume. The invention is useful prior to surgery or blood transfusion.