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

• 作 者: 汪丽曼 钱国正 邓琨
• 机 构: Department of Respiratory Medicine Changzheng Hospital,Second Military Medical College,Shanghai,Depa
• 出 处: Journal of Medical Colleges of PLA
• 发表日期: 1988年01期
• 关键词: histogram assumed recovered Apple Lawson BASIC advantageous mentioned vital quan

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.

An efficient BASIC program was established on Apple-II microcomputer with the CHESTAC-35F pulmonary function testing system tocalculate the time-constant histogram from the spirogram. By a set of analogous systems, we confirmed that the recovered time-constant histogram was within one compartment 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.