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Biomedical subjects

P O Barr

Publications and source records attributed to P O Barr.

15 recordsLinked to original sources
PubMed1985

Hyperbaric oxygen in chronic progressive multiple sclerosis: visual evoked potentials and clinical effects.

The effects of hyperbaric oxygen at a pressure of two atmospheres absolute were studied in a group of patients with chronic progressive multiple sclerosis. A slight but statistically insignificant shortening of the visual evoked potential latencies was seen after treatment with hyperbaric oxygen as compared with placebo treatment. The treatment did not appreciably halt the progression of the disease and deferioration occurred more often among the patients in the treatment group than in the control group.

Adult↗
PubMed1984

Nuclear cataract and myopia during hyperbaric oxygen therapy.

The effect on the human lens of prolonged hyperbaric oxygen therapy is reported. Eye examinations were given to 25 patients before, during, and after a series of 150 or more exposures to hyperbaric oxygen. All patients changed refraction in the direction of myopia during treatment. Fifteen of the patients had clear lens nuclei before treatment. Seven of these developed a nuclear cataract with reduced visual acuity during treatment. Reversible lens myopia has previously been noticed as a side effect of exposure to hyperbaric oxygen, but the cataractogenic effect in man has not been reported by other workers. This report strongly supports the theory of an oxidative damage to the lens proteins as a cause of nuclear cataract.

Adult↗