A mechanically ventilated pediatric patient in the process of being weaned is switched to PC-IMV with PS. The respiratory therapist notes that every PS breath is being time cycled. The most likely cause of this is which of the following?
a. The PS setting is too high.
b. The flow cycle setting is too low.
c. This is the normal cycle for PS.
d. A large leak is present around the cuffless ET tube.
ANS: D
Failure to flow cycle can be due to leaks around the ET or tracheostomy tube. Time cycling is a backup for flow cycling.
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