the mechanisms responsible for tracheal compression by mediastinal masses during general anesthesia may include the following : ( 1 ) the effect of anesthesia on pulmonary mechanics , ( 2 ) the supine body position , ( 3 ) the elimination of glottic regulation of airflow by endotracheal intubation , ( 4 ) changes related to the surgical manipulation of the tumor itself , ( 5 ) the size and location of the mediastinal mass , ( 6 ) the young age of the patient , and ( 7 ) preexisting airways disease .
C0027651
tumor
C0240318
of