Correlation of changes in ONSD with SBP, DBP, MAP, HR, and CVP at predetermined time points
| Variable | T1 | T2 | T3 | T4 | T5 | T6 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| r | P-value | r | P-value | r | P-value | r | P-value | r | P-value | r | P-value | ||||||
| SBP (mmHg) | 0.028 | 0.906 | 0.321 | 0.167 | 0.442 | 0.051 | 0.411 | 0.072 | 0.037 | 0.878 | 0.336 | 0.148 | |||||
| DBP (mmHg) | 0.390 | 0.089 | 0.417 | 0.067 | 0.637 | 0.003 |
0.351 | 0.129 | 0.163 | 0.491 | 0.348 | 0.133 | |||||
| MAP (mmHg) | 0.196 | 0.408 | 0.352 | 0.128 | 0.520 | 0.018 |
0.218 | 0.355 | 0.215 | 0.364 | 0.380 | 0.099 | |||||
| HR (beats/min) | –0.097 | 0.684 | −0.053 | 0.824 | 0.240 | 0.308 | 0.060 | 0.802 | −0.390 | 0.089 | 0.161 | 0.499 | |||||
| CVP (mmHg) | 0.047 | 0.863 | 0.252 | 0.299 | −0.132 | 0.602 | 0.309 | 0.184 | −0.234 | 0.334 | −0.003 | 0.993 | |||||
ONSD, optic nerve sheath diameter; SBP, systolic blood pressure; DBP, diastolic blood pressure; MAP, mean arterial pressure; HR, heart rate; T1, 10 minutes after intubation; T2, upon assuming the steep Trendelenburg position after docking; T3, 1 hour postdocking; T4, upon reperfusion; T5, after transition to the supine position; T6, 3 hours postextubation; CVP, central venous pressure.
*P<0.05, statistical significance.