A nomogram for B.T.P. S.-volume corrections in pulmonary ventilation tests

Journal/Book: Thorax (1963) 18 358. 1963;

Abstract: From the Pathology Department and Pulmonary Investigation Unit. Prince Henry's Hospital. Melbourne. Australia SUMMARY In pulmonary function tests repetitive calculations are required to convert the height of the spirometer tracing in centimetres into gas volume and then to apply temperature and pressure corrections. For some time a range of factors (Comroe) has been available to assist in the second of these calculations. This paper presents an easily constructed nomogram which performs the complete conversion of centimetres of spirometer tracing height to millilitres of gas volume corrected to body temperature and pressure saturated with water vapour with a precision of 10 ml. over the range 0-8 000 ml. for temperatures between 15 and 40°C. ___MH

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