Table 3.

List of contraindication to hyperbaric exposures in OSHA standards

System	Disorders that may restrict or limit occupational exposure
Neurology	History of seizure disorder other than early febrile convulsions
	Chronic inability to equalize sinus and/or middle ear pressure
Otorhinolaryngology	Meniere’s disease
	Vestibular end-organ destruction
Hematology	Hemoglobinopathies
Pulmonalogy	Cystic or cavitary disease of the lungs
	Obstructive or restrictive lung disease
	Pneumothorax
Cardiology	Cardiac abnormalities (e.g., pathologic heart block, valvular disease, intraventricular conduction defects other than isolated right bundle branch block, angina pectoris, arrhythmia, coronary artery disease)
Other	Malignancies (active) unless treated and without recurrence for 5 yr
	Impaired organ function caused by alcohol or drug use
	Conditions requiring continous medication for control
	(e.g., antihistamines, steroids, barbiturates, mood altering drugs, or insulin)