Another use for nasopharyngeal airway.

through these catheters," we recommended in our case report that jet ventilation through these catheters shodd not be necessary during the brief period of tube exchange.' According to the editorial of Benumof,' air entry should not exceed air exit. The incidence of complicating barotrauma may be decreased by selecting a properly sized exchange catheter in proportion to the size of the endotracheal tube, by regulating the airway pressure to low levels, and by delivering oxygen jets of short duration followed by a long expiratory pause. Also, it is important to monitor chest inflation and chest deflation both. As suggested by Dr. Haridas, jet ventilation should be discontinued the moment there is incomplete chest deflation, and there should be a high index of suspicion regarding the development of tension pneumothorax.