https://www.selleckchem.com/pr....oducts/hg-9-91-01.ht
The baseline ONSD value was 0.39 ± 0.05 cm. ONSD rose significantly to 0.40 ± 0.06 cm during positioning, 0.41 ± 0.06 cm during skin incision, 0.42 ± 0.07 cm during dilatation of tract, 0.41 ± 0.07 cm during insertion of tracheostomy, and 0.41 ± 0.06 cm at the end of the procedure. PCT leads to a significant rise of ONSD values during all stages of PCT. The available evidences point toward detrimental rise in ICP during PCT. ICP can be monitored noninvasively by measuring ONSD using bedside ultrasound. Kapoor I, Wanchoo J, Mahajan C,