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World J Crit Care Med. Sep 9, 2025; 14(3): 105645
Published online Sep 9, 2025. doi: 10.5492/wjccm.v14.i3.105645
Table 8 Altered findings from non-invasive estimates of intracranial pressure
(1) Optic nerve sheath diameter (ONSD)
    ONSD > 6 mm (any side)
    Increase in ONSD > 0.5 from baseline value (any side)
(2) Noninvasive TCD/TCCD ICP estimation (nICP)
    nICP > 20-22 mmHg (any side)
(3) Pulsatility index (PI)
    PI > 1.4 with FVd < 20 cm/s (any side)
    Increase in PI > 0.5 from baseline value (any side)
(4) Pupillometer derived neurological pupillary index (NPi)
    NPi < 3 (any side)
    NPi reduction > 1 from baseline value (any side)