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안태훈(Tae Hoon Ahn),유진목(Zin Mock Yoo),인광호(Kwang Ho In),강경호(Kyung Ho Kang),유세화(Se Hwa Yoo) 대한내과학회 1988 대한내과학회지 Vol.35 No.5
N/A The vital capacity(VC) consists of 2 subcomponentsinspiratory capacity(IC) and expiratory reserve volume(ERV). Each component can be measured by the accumulation of tidal breaths using a one-way valve in an external circuit. By changing the direction of the valve, IC and ERV can be measured separately. To test the validity of this method, we compared the VC measured with the standard method to the breath stacked estimate in 22 normal controls and 18 cooperative patients who had diverse causes of respiratory impairment. The results obtained were summarized as follows: 1) There was no statistically significant difference in VC measured with the standard method and involuntary breath stacking in both groups. 2) There was a good correlation between VC with the standard method and VC with involuntary breath stacking in controls and patients (r=0,91 and r=0.98, respectively), 3) The coefficient of variation by 3 repetitive measurements was less than 5%. In conclusion, vital capacity measurement with involuntary breath stacking is comparable to the standard method and this procedure may be applicable to uncooperative patients or patients with impaired consciousness.