HAROLD N. WILLARD; GEORGE A. WOLF JR.
In the course of studying mechanisms of dyspnea with the closed-circuit Benedict-Roth type spirometer, we were impressed with the effect which changes in the midposition of the chest had upon the slope of the spirogram. This possible source of error attracted the attention of Greene and Coggeshall1 and was also mentioned by Buckingham and Roth.3 Further work by Greene,2 however, minimized its clinical importance by showing that when changes in the midposition of the chest did occur during the tracing, they could be detected in most instances by observing the subject's respirations or by noting irregularities in the base line
WILLARD HN, WOLF GA. A SOURCE OF ERROR IN THE DETERMINATION OF BASAL METABOLIC RATES BY THE CLOSED-CIRCUIT TECHNIC1. Ann Intern Med. 1951;34:148–162. doi: 10.7326/0003-4819-34-1-148
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Published: Ann Intern Med. 1951;34(1):148-162.
Endocrine and Metabolism, Thyroid Disorders.
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