Table 2 Descriptive statistics of ONSD measurement (mm) and derived ICP (mm H2O) of study subjects
Time of measurement | ONSD Mean ± SD (range) | ONSD Median (25th–75th percentile) | Derived ICP Mean ± SD (Range) | Derived ICP Median (25th–75th percentile) | P value w.r.t pre-operative |
|---|---|---|---|---|---|
Baseline | 4.27 ± 0.4 (3.55–4.8) | 4.4(3.9–4.59) | 216.86 ± 30.59 (158–259) | 220(189–242.25) | – |
Lithotomy | 4.33 ± 0.38 (3.6–4.85) | 4.4(3.95–4.6) | 220.68 ± 29.42 (166–259) | 228(190–243) | < 0.0001 |
1 h | 4.7 ± 0.57 (3.85–6.75) | 4.65(4.35–4.975) | 248.73 ± 44.26 (182–406) | 247(222–267) | < 0.0001 |
2 h (n = 1) | 6.35 ± 0 (6.35–6.35) | 6.35(6.35–6.35) | 344 ± 0 (344–344) | 344 | – |
Postoperative | 4.74 ± 0.65 (3.8–7.9) | 4.72(4.35–4.988) | 251.3 ± 42.65 (182–419) | 251(220–272.25) | < 0.0001 |