Cyanide poisoning

Exposure to high levels of cyanide can harm the brain and heart, and may cause coma and death. Exposure to lower levels of cyanide may result in breathing difficulties, heart pains, vomiting, blood changes, headaches and enlargement of the thyroid gland.

Based at Providence Portland Medical Center, the unit is Oregon's only 24-hour hospital-based hyperbaric service.

During hyperbaric oxygen therapy, pressurized chambers with a 100 percent oxygen environment counter the effects of carbon monoxide poisoning, smoke inhalation, and decompression illness in scuba divers, as well as promote tissue healing in patients with impaired circulation due to diabetes, trauma and radiation therapy.