Rapid assessment of cardiac output and central blood volumes from indicator dilution curves without precalculation using programmable calculators
✍ Scribed by Mark A. Cole; Donald W. Crawford
- Publisher
- Elsevier Science
- Year
- 1980
- Weight
- 396 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0010-468X
No coin nor oath required. For personal study only.
✦ Synopsis
The program described here provides complete analysis of the indicator dilution curve by incorporating densitometric calibration and logarithmic downslope fit for the widely used Hewlett-Packard 67/97 hand calculator series. Densitometric sensitivity is calculated from the linear regression as the dye calibration factor; thus, direct entry of the dye curve deflectior~s eliminate the necessity to precalculate curve concentration. The program displays appropriate sequential time intervals prompting deflection entry of the upslope and initial exponential downslope of the curve. The remainder of the curve is generated from the logarithmically extrapolated initial downsh, pe, and the area of the curve is then obtained for calculation of cardiac output, mean transit time, and central blood volume. Programming versatility and the rapid (4-5 min) immediate analysis of indicator dilution curves are thus available.
Cardiac output
Central blood volume HP 67/97 Log extrapolation
Indicator dilution curves
Log conversion