A patient is undergoing MRND for laryngeal malignancy; while dissecting the venous tributaries the surgeon elevated the internal jugular vein for ligation. Suddenly the patient's EtCO2 dropped from 38 mmHg to 12 mmHg and the patient developed hypotension along with cardiac arrhythmia. Which of the following is the most likely cause?
ASympathetic overactivity
BVagal stimulation
CVenous air embolism
DCarotid body stimulation
Curare notch seen in capnograph is due to
ASpontaneous breathing
BCarbon dioxide rebreathing
CValve malfunction
DBronchospasm
Which of the following conditions does not cause a rise in end-tidal CO2 during thyroid surgery?
AAnaphylaxis
BThyroid storm
CNeuroleptic malignant syndrome
DMalignant hyperthermia
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