Ultrasound-guided parasternal intercostal nerve block for postoperative analgesia in mediastinal mass resection by median sternotomy: a randomized, double-blind, placebo-controlled trial

Table 3 Adverse events

Postoperative complications 24 h	PSI group (n = 20)	Control group (n = 21)	P-value
Nausea, n (%)	3 (15%)	7 (33%)	0.17
Vomiting, n (%)	2 (10%)	3 (14%)	0.68
Bloating, n (%)	2 (10%)	3 (14%)	0.68
Dizziness, n (%)	1 (5%)	1 (5%)	0.97
Excessive sedation	0 (0%)	1 (5%)	0.32
Respiratory depression, n (%)	1 (5%)	1 (5%)	0.97

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