Comparison of Continuous and Programmed Intermittent Bolus Infusion of 0.2% Ropivacaine after Ultrasound-Guided Continuous Interscalene Brachial Plexus Block in Arthroscopic Shoulder Surgery

Table 6

Incidences of adverse events.

Adverse events	Group A (n = 28)	Group B (n = 29)	value
Postoperative nausea and vomiting (PONV)	3 (10.7)	3 (10.3)	0.648
Dizziness	2 (7.1)	1 (3.4)	0.487
Hypotension	0 (0.0)	0 (0.0)	1.000
Paresthesia	6 (21.4)	12 (41.4)	0.091
Urinary retention	0 (0.0)	2 (6.9)	0.254

All measured values are presented as the number of patients (%).  < 0.05.