The therapist is preparing to perform a spontaneous breathing trial according to a weaning from the mechanical ventilation weaning protocol. Which of the following methods can accomplish this effort? I. using pressure control ventilation with SIMV at a rate of 4 breaths/minute II. having the patient breath through a T-piece or a Briggs adaptor III. applying pressure support ventilation at 6 cm
H2O IV. administering continuous positive airway pressure at 5 cm H2O
A. II only
B. I, III, IV only
C. I, II, III only
D. II, III, IV only
ANS: D
A. Incorrect response: See explanation D.
B. Incorrect response: See explanation D.
C. Incorrect response: See explanation D.
D. Correct response: The spontaneous breathing trial (SBT) involves an integrated patient assessment during spontaneous breathing protocol with little or no ventilator assistance. The SBT can be accomplished by (1) using a T-piece (Briggs adaptor), (2) using a low level of CPAP (5 cm H2O), or (3) a low level of PSV (5 to 7 cm H2O) for at least 30 minutes, but no longer than 120 minutes.
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