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Hepatic portal venous gas with hyperbaric decompression: ultrasonographic identification.

HPVG detected radiographically or using ultrasonography generally is regarded as a clinically significant finding that usually indicates the need for immediate surgical intervention. Clinical reports of HPVG first appeared in 1955 in infants with bowel distention and later in adults with bowel infarction.t,2 Other causes involve ulcerative bowel diseases or septicemia and are often associated with significant mortality.3 Recent studies have reported HPVG in experimental animals that underwent decompression from hyperbaric pressures and subsequently developed venous gas bubbles.4 In this report we describe the detection of HPVG using echo ultrasonography in a human volunteer after an experimental hyperbaric