At the end of the operation, neuromuscular blockade was antagonizedunder monitoring with a nerve stimulator. Unfortunately, your stimulatordoes not have a recording function. You have to combine other clinical testsfor your judgment. Which of the following clinical test is least reliable toexclude the residual neuromuscular blockade?
(A) Sustained head-lift for 5 seconds
(B) Sustained hand-grip for 5 seconds
(C) Maximum inspiratory pressure ≧ 40-50 cmH2O
(D) Normal tidal volume
(E) Sustained “tongue depressor test”