A study by Matic et al. tried to compare T‑tube weaning with
PSV in mechanically ventilated COPD patients in whom
extubation failed after a 2‑h SBT.[29] They found PSV to
be more suitable than T‑tube for difficult‑to‑wean patients
with COPD based on shorter time needed for weaning
from MV, total MV duration, and median time spent in ICU.