Failing to oxygenate/ventilate(any invasive vent, not just traches) DOPES Displacement too deep (unlikely, unless all of: small patient, low puncture site, and adjustable flange trache) too shallow – opening may be against posterior wall in soft tissue – rapidly expanding subcutaneous emphysema completely out Obstruction sputum plug blood/clot plug inner cannula blockage only kinking speaking […]