the hazard of inducing feneral anesthesia before correction of airway obstruction

preoperative diagnosis of an airway obstruction should alert anesthetist to a potentially life threatening situation. intubation of the trachea while the patient is awa- ke or tra~heostomy under local anesthesia is a most useful technique and safty method in induction of anesthesia where problems are anticipated during the induction or g e ne r a l anesthesia.