In this study, oxygen saturation was obtained by ABGA and continuous monitoring for 12 hours at the postanesthesia room in 42 patients, who received operation under general anesthesia by department of oral and maxillofacial surgery. The data
including
age, sex, duration of operation, type of operation, intermaxillary fixation and smoking habit were as follows.
1. the incidence of postoperative hypoxemia in the patient of oral & maxillofacial surgery were observed 13 patients (30.9%) of 42 patients.
The hypoxemia occured at immediate postoperation (26.2%), postoperative 6hrs (7%), postoperative 12hrs (2.3%).
2. In age distribution, seventh decade was the highest age group to occur of hypoxemia and increased the incidence rate of hypoxemia follow to aging.
3. In sex distribution, incidence of hypoxemia was more common tendency in female than male.
4. According to operation time, the more high incidence of hypoxemia in a long time operation than in a short time operation.
5. According to type operation, surgery to induced severe injury of surrounding tissue such as cancer surgery was more common incidence of post operative hypoxemia.
6. The ratio of hypoxemia was developed in IMF and non IMF patients in 38%, 27% respectively.
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