Most common cause of death after anaesthesia

(C) (Cardiac arrest) (131- Ajay Yadav 5th)More than 80% of cardiac arrest occurs at the time of inductionHypotension -may occurs in intraoperative and post ooperatve period due to effect of anaesthatic drugs, inadequate fluid infusion, excessive loss, cardiac arrhythmiasHypothermia - is the most common thermal pertubation seen in anaesthesia.* Heat loss during general anaesthosia may be as high as 30 kcal /hr* Shivering occurs as a protective mechanism to hypothermia, 02 consumption may increase to 4 times (400%)* Shivering can be abolished by inhibition of hypothalamus* Most common shivering is seen after halothane* Pethidine is drug of choice. Tramodol is 2nd drug of choiceAtelectasis is the MC pulmonary complications of GA in post operative period and the MC cause of at electasis is bronchial obstruction by secretions leading to lobar or segmental collapse (V/Q mismatch).Post operative respiratory depression has been cited as the most common cause of anaesthesia related death in perioperative period.