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Seizure incidence by treatment pressure in patients undergoing hyperbaric oxygen therapy. | LitMetric
Introduction : Hyperbaric oxygen (HBO2) therapy uses different maximum treatment pressures. A side effect of HBO2 is oxygen toxicity seizure. The purpose of this study was to determine the overall incidence of oxygen toxicity seizure and assess risk at different treatment pressures.Method : A retrospective chart review was performed on patients who underwent HBO2 at a university hospital and at an outpatient center. Statistical analysis was performed to determine overall incidence of seizure and identify risk factors including maximum treatment pressure.Results : A total of 931 patients were identified representing a total of 23,328 treatments. The overall incidence of seizure was one in 2,121 treatments (five per 10,000). There were zero per 10,000 at 2.0 atmospheres absolute/atm abs (0/16,430), 15 per 10,000 at 2.4/2.5 atm abs (1/669) and 51 per 10,000 at 2.8 atm abs (1/197). There was a statistically significant difference for seizure between the different pressures (χ2 (2, 23,540) = 31.38, p < .001).Discussion : The overall incidence of oxygen toxicity seizure in this study is consistent with recent reports. This study demonstrated a statistically significant increased risk of seizure with increasing treatment pressure. Treatment at higher pressure should be chosen based on demonstrable benefit with a clear understanding of increased risk with higher pressure.
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