Table 2.

Sonographic optic nerve sheath diameters in the propofol group and the sevoflurane group during robot-assisted laparoscopic prostatectomy

Time point	Propofol group (mm)	Sevoflurane group (mm)	P value
T1	4.75 ± 0.37	4.74 ± 0.42	0.942
T2	5.09 ± 0.36	5.22 ± 0.41	0.319
T3	5.22 ± 0.34	5.42 ± 0.36	0.096
T4	5.27 ± 0.35	5.57 ± 0.28	0.007
T5	5.18 ± 0.37	5.29 ± 0.41	0.403

Data are presented as mean ± standard deviation. T1 = 10 min after anesthetic induction in the supine position, T2 = 5 min after establishing carbon dioxide pneumoperitoneum and a steep Trendelenburg position, T3 = 30 min after establishing carbon dioxide pneumoperitoneum and a steep Trendelenburg position, T4 = 60 min after establishing carbon dioxide pneumoperitoneum and a steep Trendelenburg position, T5 = at the end of surgery after desufflation of pneumoperitoneum in the supine position