Time to extubation
This outcome was evaluated in nine studies. There was an ESP block group in two studies, a PIF block group in three studies, and a TTMP block in five studies. No data were available on the PECS I block for this outcome.
The PIF block was the only RA technique with statistically significant results; however, surprisingly, the required time to extubate the patient was longer for patients receiving this block 2.14 h (0.22 h to 4.06 h) when compared to placebo or no intervention.