Butorphanol as an Adjuvant to Ropivacaine for Adductor Canal Blocks in Total Knee Arthroplasty Patients: A Randomized, Double, Blind Study

Table 4

Postoperative complications.

	Group R (n = 35)	Group BR (n = 35)	value
PONV	10 (28.6)	7 (20.0)	0.403
Pruritus	2 (6.1)	0 (0.0)	0.473
Constipation	0 (0.0)	0 (0.0)	>0.05
Somnolence	0 (0.0)	0 (0.0)	>0.05
Uroschesis	0 (0.0)	0 (0.0)	>0.05
Respiratory depression	0 (0.0)	0 (0.0)	>0.05

Note. Values are expressed as a number (%). Abbreviations: PONV, postoperative nausea and vomiting.