Comparison of the effectiveness of two different concentrations of ropivacaine for intrapleural analgesia in reducing stimulatory pain caused by chest tubes after uniportal video-assisted thoracoscopic surgery: a randomised controlled study

Table 4 Comparison of adverse reactions during 48 h after surgery among the three groups

Variable	Respiratory depression	Hypotension	Nausea and vomiting	Bradycardia	Dizziness	hypoxemia	Total adverse reaction rate (%)
Group N (n = 30)	0	0	2	0	2	0	4 (13.3%)
Group L (n = 30)	1	1	0	0	1	0	3 (10.0%)
Group M (n = 30)	0	0	0	0	1	0	1 (3.3%)
χ²	2.022	2.022	4.091	-	0.523	-	1.921
P-value	0.364	0.364	0.129	-	0.770	-	0.383

Data are presented as (n, (%)). Group L: 0.25% ropivacaine, group M: 0.50% ropivacaine

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