Effects of water immersion on pulmonary function in asthmatics

J. J. Leddy, A. Roberts, J. Moalem, Timothy B Curry, C. E G Lundgren

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Immersion induces air trapping in the lungs, as does asthma. Consequently, when using diving apparatus, asthmatics may face greater risk than non-asthmatics of pulmonary barotrauma (PBT) during ascent We studied the pulmonary airflows and closing capacities (CC = closing volume + residual volume) in subjects with exercise-induced asthma (A, n = 12) and in healthy controls (C, n = 11) under four conditions: dry and immersed, both before and after exercise (treadmill running, non-immersed). Immersed, both C and A had significant and equivalent reductions in vital capacity, FEV1, FEV1/FVC, and FEF25%-75%. Post-exercise and immersed, pulmonary airflows deteriorated further in A but were better in C: FEV1 (A, 3.6 ± 0.8 liter vs. 3.3 ± 0.8 liter, P = 0.001; C, 3.9 ± 0.5 liter vs. 4.1 ± 0.6 liter, P = 0.006), FEF25-75% (A, 3.5 ± 1.0 liter · s-1 vs. 3.0 ± 0.8 liter · s-1. P < 0.05; C, 4.0 ± 0.9 liter · s-1 vs. 4.3 ± 0.9 liter · s-1, P<0.05). Therefore, in contrast to C, A subjects had reduced pulmonary airflows during immersion after exercise. Furthermore, A subjects more often had no closing volume phase IV when immersed after exercise than C (P = 0.005). Interpreting the absence of phase IV as indicative of more air trapping in the asthmatics during immersion after exercise would be consistent with the reductions in airflow.

Original languageEnglish (US)
Pages (from-to)75-82
Number of pages8
JournalUndersea and Hyperbaric Medicine
Volume28
Issue number2
StatePublished - Jun 2001
Externally publishedYes

Fingerprint

lung function
Immersion
airflow
exercise
air flow
Lung
lungs
Closing Volume
Water
asthma
trapping
water
Air
Barotrauma
Exercise-Induced Asthma
air
diving
Diving
Residual Volume
Vital Capacity

Keywords

  • Asthma
  • Closing volume
  • Diving
  • Exercise
  • Pulmonary barotrauma
  • Pulmonary function

ASJC Scopus subject areas

  • Aquatic Science
  • Medicine (miscellaneous)

Cite this

Leddy, J. J., Roberts, A., Moalem, J., Curry, T. B., & Lundgren, C. E. G. (2001). Effects of water immersion on pulmonary function in asthmatics. Undersea and Hyperbaric Medicine, 28(2), 75-82.

Effects of water immersion on pulmonary function in asthmatics. / Leddy, J. J.; Roberts, A.; Moalem, J.; Curry, Timothy B; Lundgren, C. E G.

In: Undersea and Hyperbaric Medicine, Vol. 28, No. 2, 06.2001, p. 75-82.

Research output: Contribution to journalArticle

Leddy, JJ, Roberts, A, Moalem, J, Curry, TB & Lundgren, CEG 2001, 'Effects of water immersion on pulmonary function in asthmatics', Undersea and Hyperbaric Medicine, vol. 28, no. 2, pp. 75-82.
Leddy JJ, Roberts A, Moalem J, Curry TB, Lundgren CEG. Effects of water immersion on pulmonary function in asthmatics. Undersea and Hyperbaric Medicine. 2001 Jun;28(2):75-82.
Leddy, J. J. ; Roberts, A. ; Moalem, J. ; Curry, Timothy B ; Lundgren, C. E G. / Effects of water immersion on pulmonary function in asthmatics. In: Undersea and Hyperbaric Medicine. 2001 ; Vol. 28, No. 2. pp. 75-82.
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