A 52-year-old patient is receiving VC SIMV ventilation due to myasthenia gravis. The patient has no history of pulmonary disease and is alert and oriented. The following data is observed: 1) Mode SIMV, Set Rate 6, Total rate 12, VT(spont) 425 mL, PEEP 5 cm, H2O, FIO2 0.40. 2) pH 7.42, PaCO2 38 torr, PaO2 122 torr, HCO3- 24 mEq/L, BE 0 mEq/L. 3) MIP -42 cm H2O. The respiratory therapist should recommend _______
A. extubation
B. CPAP 5 cm H2O, PS 15 cm H2O
C. decreasing the set rate to 2/min, ABGs in 20 minutes
D. daily SBT for several days, then reevaluate
