Retrospective investigation of the medical emergency cases occurred at the Niigata University dental hospital in 8years and on the present condition of our rescue system of emergency cases．

Yutaka Tanaka, Mayumi Miura, Hiroshi Matsui, Akira Toyosato, Katsuhiko Miura，Kenji Seo，Genji Someya
Department of Dental Anesthesia, School of Dentistry, Niigata University
(Chief Prof. Genji Somya)

Abstract
We investigated of medical emergency cases occurred at the Niigata University dental hospital in 8 years and on the present condition of our rescue system of emergency cases retrospectively． A total of 40 emergency cases occurred in 8 years. Emergency cases which were needed to call for a rescue happened to occur during some kinds of dental treatments in 32 cases．Twelve cases belonged to the department of oral surgery, and 11 cases to that of prosthodontics, and these accidents seemed to occur during surgical operations or prosthodontic treatments. In 19 cases local anesthesia was applied to the patients when emergency cases occurred, and they occurred just after the injections of local anesthesia in 10 cases of them. Neurogenic shock due to pain (10 cases) and hyperventilation (5 cases) were the most commonly observed accidents and a severe pain during the injections of local anesthesia and dental treatments has a possibility to induce them. Psychological factors such as fear and anxiety against the dental treatments and systemic complications also seemed to be responsible for the accidents. Because of adequate treatments to the accidents which were conducted by dental anesthesiologist these accidents have not resulted in lethal one yet. However, emergency rescue system of the hospital should be organized more completely by not only staffs of the department of dental anesthesia but also all members in the hospital which concerns the dental treatments in future.

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