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Leonard D. Hudson, MD; Thomas L. Petty, MD; Bali Baidwan; Kathryn Stark, RN

JAMA. 1978;240(25):2754-2755.

Abstract
The accuracy of a simple, pneumatic, direct-recording spirometer suitable for office use was evaluated by comparing spirometry on a water-sealed, 13.5-liter, water-filled spirometer for 120 patients. Good correlation between the two spirometers was seen through a wide range of values for forced vital capacity, forced expiratory volume in one second, and forced expiratory flow during 25% to 75% of forced vital capacity, with coefficients of correlation being 988, 988, and 948, respectively. All correlations were significant. The pneumatic spirometer is accurate, simple to operate, and suitable for spirometry in the office and clinic.

(JAMA 240:2754-2755, 1978)

Author Affiliations
From the Division of Respiratory Diseases, Harborview Medical Center and University of Washington, Seattle (Dr Hudson and Ms Stark); and the Division of Pulmonary Diseases and Webb-Waring Lung Institute, University of Colorado Medical Center, Denver (Dr Petty and Mr Baidwan).

Footnotes
Reprint requests to Division of Respiratory Diseases, Harborview Medical Center, 325 Ninth Ave, Seattle, WA 98104 (Dr Hudson).

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