To analyze complications of hyperbar ic treatment and the management of these complications． Methods: There are 129 cases treated with huperbaria, 125 were severe head injury, 2 were brain infarction, one was carbon monoxide toxication and an other was anesthesia accident． These complications were analyzed． Results: There were 7 of 129 cases suffered with headache and vertigo, one of them was dead． Conclusion: Severe h ead injury patients treated with hyperbaria must be careful, cease the huperbaric treatmen t immediately whenever patients feel discomfort．

There are 1?024 cases of severe head injury hospita lized． 917 of them were closed head injury (89, 55%), 107 of them were opening head injury(10.45%)． Results: good recover: 326(31.83%)．moderate disability: 185(18.07%), severe inability 139(13.50%), persistent vegetative state　59(5.75%), death 315 (30.76%)． Conclusion: The early diagn osis and treatment of sever head injury is beneficial to the outcome of these patients． Special trea tment to different phrase of severe head injury, especially the moderate hypothermia treatment, co uld improve the outcome of these patients．