Journal of oral science
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A prolonged period of oral surgery is a potential risk factor of postoperative mental disorders although no such report has been published to date. We retrospectively studied perioperative features in 36 patients who underwent prolonged (10 hours or more) of oral surgery. Patients were categorized as pre-delirium (Pre-D) when they manifested 1 or 2 symptoms and delirium (D) when they showed more than 2 symptoms, according to the modified International Classification of Diseases, 10th edition. ⋯ Propofol-based general anesthesia was most commonly employed. The time prior to appearance of pre-delirium was significantly shorter in D (30.0 +/- 16.7 hours) than in Pre-D (55.0 +/- 35.0 hours) group patients. Our results indicate that, in general, patients predisposed to postoperative mental disorders have moderate complications preoperatively, are generally older than 50-years-old, receive propofol-based general anesthesia and/or experience a massive hemorrhage during the operation.