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(Chest. 1973;64:678-682.)
© 1973 American College of Chest Physicians

Pulmonary Diffusing Capacity during Exercise in Women

C. A. Guzman M.D.1 and E. D. Summers 1

1 Respiratory Division, Department of Medicine, Royal Victoria Hospital, McGill University, Montreal

Steady state exercise diffusing capacities at three different levels of work have been measured in 46 women, aged 20 to 59. All the subjects had normal resting pulmonary function tests and normal chest radiographs. There was an age dependent decline in the exercise diffusing capacity of the lung at all work levels, which became more marked after the age of 50. Comparison with data from men shows that the younger women have a lower diffusing capacity than men of the same age but that the decline with age is less marked. Regression equations based on age and oxygen uptake for the women are: 1) DLCO=28.38-.215(age)+8.21 (oxygen uptake), and 2) DLCO/L-MLC=9.14-0.048(age)+1.396 (oxygen uptake).

Submitted on March 6, 1973
Accepted on May 20, 1973




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Y.-C. T. Huang, S. R. O'Brien, and N. R. MacIntyre
Intrabreath Diffusing Capacity of the Lung in Healthy Individuals at Rest and During Exercise*
Chest, July 1, 2002; 122(1): 177 - 185.
[Abstract] [Full Text] [PDF]


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