If a patient who has failed an SBT still meets the criteria for discontinuation of ventilation, an SBT should be performed every _______ hours to determine weanability
a. 6
b. 12
c. 24
d. 36
ANS: C
If after failing an SBT the patient still meets the criteria for discontinuation of ventilation, anoth-er SBT should be performed every 24 hours. It is important to wait 24 hours before attempting another trial. Frequent SBTs over a single day are not helpful and can have serious consequences. Testing more frequently than every 24 hours offers no advantages.
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