Computation of Time-Constant Histograms from the Forced Expired Volume-Time Curves

汪丽曼; 钱国正; 邓琨

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Computation of Time-Constant Histograms from the Forced Expired Volume-Time Curves

Updated：2026-03-12

- Computation of Time-Constant Histograms from the Forced Expired Volume-Time Curves
- Military Medical Research Issue 1, Pages: 90-93(1988)
- Affiliations：
  
  1. Department of Respiratory Medicine Changzheng Hospital
  2. Second Military Medical College
  3. ,Shanghai
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：1988
- Accepted：
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[1]汪丽曼,钱国正,邓琨.Computation of Time-Constant Histograms from the Forced Expired Volume-Time Curves[J].Journal of Medical Colleges of PLA,1988(01):90-93.
DOI：

[1]汪丽曼,钱国正,邓琨.Computation of Time-Constant Histograms from the Forced Expired Volume-Time Curves[J].Journal of Medical Colleges of PLA,1988(01):90-93. DOI：

摘要

Abstract

<正> An efficient BASIC program was established on Apple-Ⅱmicrocomputer with the CHESTAC-35F pulmonary function testing system tocalculate the time-constant histogram from the spirogram.By a set of analogousstudies

we confirmed that the recovered time-constant histogram was within onecompartment of the assumed one and that the root of mean square values of theresiduals between the experimental and model volume-time curves was 0.02.Infour healthy adult subjects

the mean value of time-constant histograms（TCx）hadthe variation coefficient 6.6％.The results show that our method is reliable andreproducible

and it can be used for clinical investigation.

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