Abstract
Orthognathic surgery under general anesthesia was performed on 255 patients from April 1982 through December 1992 at the First Department of Oral and Maxillofacial Surgery, Osaka Dental University. Based on preoperative examinations of those patients, the following prevalence rates of diseases were obtained, reinforcing the need for preoperative examinations:
1. Anemia was found in21patients (8.2%); two (2.3%) of them were male and19 (10.9%) were female.
2. Abnormality of liver function was found in 17 patients (6.7%); nine (11.1%) were male and eight (4.6%) were female.
3. Arrthythmia was found in 6 patients (2.4%); one (1.2%) was male and five (4.6%) were female.
4. Allergic disease was found in 47 patients (18.4%); 15 (18.5%) were male and 32 (18.4%) were female. Eighteen out of 47 patients suffered from asthma.
5. Hyperthyroidism was found in two patients (0.8%).
