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. 1970 Mar;25(2):178–179. doi: 10.1136/thx.25.2.178

Variability of relaxed expiratory volume and forced inspiratory volume

M K Tandon 1, A H Campbell 1
PMCID: PMC472142  PMID: 5441988

Abstract

Measurements of relaxed expiratory volume in one second (REV1·0) and forced inspiratory volume in one second (FIV1·0) were made on 50 subjects on two occasions to know the variability of these procedures in the individual subject. The mean coefficients of variation for REV1·0 and FIV1·0 were 6·74% and 8·92%, respectively. The 95% confidence limit of difference between highest readings obtained on two occasions for REV1·0 and FIV1·0 was 0·38 litre and 0·214 litre, respectively. These results compare favourably with similar data reported for other ventilatory tests. We feel that if a little time is spent teaching subjects to produce REVs, then reproducible results may be obtained.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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