Table 2.

Adverse events during the procedure.

	Group 1 (n = 40)	Group 2 (n = 40)	P value
Patient movements affecting the procedure	18 (45.0%)	2 (5.0%)	<0.001
Hypotension (mean arterial pressure < 60 mm Hg)	0 (0%)	0 (0%)	1.000
Patients requiring ephedrine (systolic blood pressure < 80 mm Hg)	0 (0%)	0 (0%)	1.000
Apnea with desaturation (SpO2 < 90%)	0 (0%)	9 (22.5%)	0.002
Postoperative nausea and vomiting	0 (0%)	0 (0%)	1.000
REMI-induced hyperalgesia	0 (0%)	0 (0%)	1.000

Data are shown as number (percentage). Group 1: initial REMI Ce of 1.0 ng/mL; Group 2: initial REMI Ce of 2.0 ng/mL.

Ce = effect-site concentration; REMI = remifentanil, SpO₂ = peripheral oxygen saturation.