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Flying after diving and decompression sickness

R D Vann1, P Denoble, M N Emmerman

  • 1Divers Alert Network, Department of Anesthesiology and F.G. Hall Hypo/Hypobaric Center, Duke University Medical Center, Durham, NC 27710.

Aviation, Space, and Environmental Medicine
|September 1, 1993
PubMed
Summary
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Flying after recreational diving with pre-existing decompression sickness (DCS) symptoms significantly increases the risk of severe Type II DCS, incomplete recompression relief, and residual symptoms. Divers should avoid flying with any DCS symptoms.

Area of Science:

  • Diving Medicine
  • Hyperbaric Medicine
  • Aerospace Medicine

Background:

  • Decompression sickness (DCS) is a risk of recreational diving.
  • The effects of post-dive flying on DCS severity and treatment outcomes require further investigation.

Purpose of the Study:

  • To analyze the impact of flying after recreational diving on DCS occurrence, specifically Type II DCS.
  • To evaluate the influence of flying on symptom relief after recompression and residual symptoms.
  • To identify risk factors associated with flying and DCS outcomes.

Main Methods:

  • Logistic regression analysis of 1,159 recreational diving DCS incidents.
  • Categorization of divers into groups based on pre-flight symptoms and post-flight symptom development.
  • Comparison of DCS severity and treatment success between flying and non-flying diver groups.

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Main Results:

  • 13.9% of DCS incidents involved pre-flight symptoms; 5.6% developed symptoms during or after flight.
  • DCS symptoms occurring during or after flight were not more severe than in non-flying divers.
  • Flying with pre-existing DCS symptoms was significantly associated with Type II DCS, incomplete recompression relief, and residual symptoms.

Conclusions:

  • Divers with pre-existing DCS symptoms who fly are at increased risk for more severe DCS outcomes.
  • Avoiding flight with any DCS symptoms is crucial for diver safety and successful treatment.
  • Further research may explore specific flight parameters and their interaction with DCS.