End–tidal CO2 is increased to maximum level in –: (A) Pul. embolism, (B) Malignant hyperthermia, (C) Extubation, (D) Blockage of secretion
Answer is B. The unanticipated doubling or tripling of end tidal CO2 is the earliest & most sensitive indicator of malignant hyperthermia. The earliest signs seen during anesthesia are masseter muscle rigidity (MMR), tachycardia, & hypercarbia.