Background: The tracheal tube (TT) produces reversible bronchoconstriction and increases pulmonary airway resistance and wide hemodynamic change compared to the laryngeal mask airway (LMA). This trend can have an effect in pulmonary function during the postoperative period specially vascular surgery patient. The aim of this study was to compare early pulmonary effect in patients undergoing lower leg vascular surgery with the LMA or with the TT.
Methods: Sixty patients scheduled for lower leg vascular surgery under general anesthesia were randomized to receive the LMA or the TT. Before anesthesia and 1 hour after tube removal, pulse oximetry values (SpO2) were recorded and patients performed forced spirometry in the supine position. And pneumonia and atelectasis was recorded during a weak after operation.
Results: Preoperative pulmonary function was normal in both groups. There were no differences between groups in the preoperative respiratory function test and SpO2. Following surgery forced expiratory volume in the first second (FEV1), forced vital capacity (FVC) and peak expiratory flow (PEFR) decreased in TT groups. The FEV1/FVC did not change in either of the groups. In the TT group, compared to patients using the LMA, there was a greater relative decrease of SpO2 and increase early postoperative pulmonary complications.
Conclusions: The use of LMA instead of TT for airway management during lower leg vascular surgeries causes less depression of pulmonary functions during the early postoperative period.

Pulmonary effect of laryngeal mask airway compare to tracheal tube during the early postoperative period in lower leg vascular surgery patient