Decreased pulmonary diffusing capacity of divers over a 6-year period |
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| Authors: | S Bermon M-N Magnié C Dolisi J Wolkiewiez and M Gastaud |
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| Institution: | (1) Laboratoire de Physiologie, Faculté de Médecine, F-06107 Nice Cedex 02, France, FR;(2) Centre Hyperbare, C.H.U. H?pital Pasteur, 30 av de la voie romaine, BP 69, F-06002 Nice Cedex 01, France, FR;(3) Laboratoire d'Exploration Fonctionnelle Respiratoire, C.H.U. H?pital Pasteur, 30 av de la voie romaine, BP 69, F-06002 Nice Cedex 01, France, FR |
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| Abstract: | Non-smoking, male, professional firemen divers (n = 15) underwent two pulmonary function tests (PFT) separated by 6 years. Measured data were compared to European Coal Steel
Community recommended reference values to permit cross-sectional and then longitudinal study. Higher vital capacity (VC; P < 0.01) and forced expiratory volume in 1 s (FEV1; P < 0.05), and lower maximal mid-expiratory flow (MMEF) coefficient with VC (MMEF/VC; P < 0.05) were observed in both PFT. Diver's pulmonary diffusing capacity (DLCO) and the coefficient with alveolar volume (DLCO/V
A) showed significantly (P < 0.001) different evolution profiles than those expected from predicted values. In divers, DLCO and DLCO/V
A decreased from 104.0% to 91.4% and from 106.4% to 91.5% of predicted values respectively. Changes in DLCO and DLCO/V
A correlated positively with the initial measurement of DLCO (r = 0.67, P < 0.01) and DLCO/V
A (r = 0.74, P < 0.01) respectively, whereas no correlation between changes in pulmonary gas transfer function and age or diving history
parameters was found. Thus, it is suggested from our observations that hyperbaric atmosphere exposure increases the effects
of aging on pulmonary diffusing capacity and that pulmonary gas transfer function should be regularly tested in professional
and recreational divers.
Accepted: 22 February 1997 |
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| Keywords: | Diving Pulmonary diffusing capacity Longitudinal study |
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