Effect of maxillomandibular fixation on the incidence of postoperative pulmonary atelectasis

Purpose: Our goal was to assess the role of maxillomandibular fixation (MMF) on postoperative atelectasis. Patients and Methods: We examined 64 patients in 2 groups: MMF and non-MMF. Atelectasis was diagnosed by comparing preoperative and postoperative chest radiographs, arterial blood gas analysis, and axial temperatures. Postoperative chest computed tomography scans were also used as the best way to detect atelectasis. Results: Of the MMF and non-MMF patients, 37.5% and 15.6%, respectively, sustained atelectasis (P .10). PaO2 was decreased in some cases of atelectasis, especially in patients with extensive involvement. Conclusion: MMF should be considered as a contributing factor for postoperative pulmonary atelectasis. © 2002 American Association of Oral and Maxillofacial Surgeons J Oral Maxillofac Surg 60:988-990, 2002