An air or gas embolism is caused by air in the arteries caused by diving or an invasive medical procedure that punctures an artery or lung.

Carbon monoxide poisoning or CO poisoning complicated by cyanide poisoning. Also includes poisoning from methylene chloride.

The medical names for these severe infections of the muscle are clostridial myositis and myonecrosis.

Acute ischemias (loss of blood flow)-usually caused by heavy equipment.

Decompression sickness is one of the first conditions treated with HBOT. It is brought on when a diver ascends too quickly and does not allow the oxygen in the body to expand at a safe rate.

Including problem wounds; this category includes diabetic foot ulcers, which afflict one out of five people with type 2 diabetes and can lead to amputation. Recently added to this category was central retinal artery occlusion, or “stroke of the eye,” from blockages in the arteries of the eye.

Severe Anemia is any acute, severe blood loss, such as from a wound on the battlefield or severe trauma.

(an accumulation of infected material); these abscesses of the brain are common in patients with abnormal immune systems.

From “flesh-eating bacteria,” these severe infections usually progress rapidly.

Chronic bone infections that resist standard treatment most common in the lower leg after severe trauma.

Radiation damages blood vessels, and the lack of blood supply eventually can cause wounds to form in soft tissue and bone.

Grafts and flaps of skin and other tissue (cartilage, bone, fat) are used in reconstructive surgery (such as breast reconstruction after a mastectomy). In some cases, blood supply to the graft or flap is compromised, causing complications.

From fire or heat.

Classically defined as a hearing loss of at least 30 dB over at least three contiguous frequencies – occurring within three days.