COMPUTATION OF TIME-CONSTANT HISTOGRAMS FROM THE FORCED EXPIRED VOLUME-TIME CURVES
- VernacularTitle:用力呼气容积—时间曲线的时间常数直方图测定
- Author:
Liman WANG
- Publication Type:Journal Article
- Keywords:
compartment model;
volume-time curve;
time-constant histogram;
lung volume measurement
- From:
Academic Journal of Second Military Medical University
1985;0(05):-
- CountryChina
- Language:Chinese
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Abstract:
An efficient BASIC program was established on Apple-Ⅱ microcomputer with the CHESTAC-3EF pulmonary function testing system to calculate the time-constant histogram from the spirogram.By a set of analogue studies, we confirmed that the recovered time-constant histogrgram was within one compartment of the assumed one and that the root of mean square values of the residuals between the experimental and model volume-time curves was 0.02. In four adult healthy subjects, the mean value of time-constant histograms (TCx ) had the variation coefficient (6.6%). The results show that our method is reliable and reproducible, and it can be used for clinical investigation.
