Effect of maxillomandibular fixation on the incidence of postoperative pulmonary atelectasis

Our goal was to assess the role of maxillomandibular fixation (MMF) on postoperative atelectasis.

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.

Of the MMF and non-MMF patients, 37.5% and 15.6%, respectively, sustained atelectasis (P <.05). Plate type was the most prevalent (71%). The right lung was more involved (59%). Fever was not a significant finding in atelectatic patients (P >.10). PaO(2) was decreased in some cases of atelectasis, especially in patients with extensive involvement.

MMF should be considered as a contributing factor for postoperative pulmonary atelectasis.