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Subchapter 7. General Industry Safety Orders
Group 26. Diving Operations
Article 153. Commercial Diving Operations

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Appendix A

Examples of Conditions Which May Restrict or Limit

Exposure to Hyperbaric Conditions

The following disorders may restrict or limit occupational exposure to hyperbaric conditions depending on severity, presence of residual effects, response to therapy, number of occurrences, diving mode, or degree and duration of isolation.

History of seizure disorder other than early febrile convulsions.

Malignancies (active) unless treated and without recurrence for 5 years.

Chronic inability to equalize sinus and/or middle ear pressure.

Cystic or cavitary disease of the lungs.

Impaired organ function caused by alcohol or drug use.

Conditions requiring continuous medication for control (e.g., antihistamines, steroids, barbiturates, moodaltering drugs, or insulin).

Meniere's disease


Obstructive or restrictive lung disease.

Vestibular end organ destruction.

Pneumothorax. Cardiac abnormalities (e.g., pathological heart block, valvular disease intraventricular conduction defects other than isolated right bundle branch block, angina pectoris, arrhythmia, coronary artery disease).

Juxta-articular osteonecrosis.

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