From: Regional analgesia techniques for effective recovery from coronary artery bypass surgeries: a retrospective study involving the experience of a single center
Regional anesthesia ( +) (n:179)
Regional anesthesia (−) (n:41)
Tramadol (mg)
34.7 ± 31*
95.6 ± 44
Pethidine (µg)
20.6 ± 9.4+
45.6 ± 28.2