Pericapillary Gas and Water Distribution Volumes of the Lung Calculated from Multiple Indicator Dilution Curves

Quantitation of valvular regurgitation from multiple indicator-dilution curves.

normal subjects and iii patients with ilomiregurgitanit heart disease yielded a similar contour. This suggested that in the albseimce of reour-itation the pallameters of the distal (arterial) curve ca.n be predicted fromm the proximlmai ( pulm1nomary artery) culve. The distortion of the arterial curve byregurgitationi can timerefore l)e comnpared withi time undistorted )ulmmonmary lartery curve...

A mathematical model for the estimation of heart volumes from indicator dilution curves.

The estimation of ventricular volumes by indicator dilution methods is subject to errors resulting from incomplete mixing and nonuniform sampling. A mathematical model is proposed which theoretically permits calculation of these errors. The model allows for nonuniform distribution of indicator in the ventricle and for nonuniform representation of the end-diastolic volume (EDV) in the systolic e...

Multiple breath helium dilution measurement of lung volumes in adults.

This manuscript recommends techniques (methodology) for the measurement of total lung capacity (TLC), functional residual capacity (FRC) and residual volume (RV) in adults using the closed-circuit helium dilution method. Lung volumes were first measured using a hydrogen gas dilution technique about 200 yrs ago. Helium replaced hydrogen for safety reasons 40–50 yrs ago when clinicians started to...

Estimation of extravascular lung water by indicator-dilution techniques.

A transfer function analysis of coronary and renal circulation calculated from upstream and downstream indicator-dilution curves.

A method has been developed for computing the distribution of blood transit times (transfer function) from indicator-dilution curves recorded from upstream (aorta) and downstream (pulmonary artery, renal vein and coronary sinus) circulatory sites in mongrel dogs. The method employs a Fourier series transformation of the upstream and downstream curves and yields a time-domain transfer function w...