1. Bedside sonographic measurement of optic nerve
Saadatnia M
Isfahan University of medical sciences

2. optic nerve sheath diameter

7. Increased OS-ON ratio >2.5

8. Optic nerve sheath diameter measurement via bedside ocular ultrasonography in patients with suspected intracranial event in the emergency department is a useful method to determine ICP increase and its severity.

9. Optic disk elevation

11. A minimum disc height of 0
A minimum disc height of 0.6 mm, obtained via ultrasound can be 82% sensitive and 76% specific for papilledema
Optic nerve sheath diameter of greater than five mm, measured three mm posterior to the orbit, can be a sensitive (88%) and specific (93%) marker for elevated intracranial pressure of greater than 20 cm H2O

12. Point of care ultrasonography
Optic disc elevation of greater than 0.6 mm, in addition to optic nerve sheath diameter of greater than five mm, have been shown to be correlated with papilledema. Visualization of papilledema by POCUS in the ED may serve as an effective adjunct or alternative to traditional funduscopic examinations in the diagnosis and management of IIH.

19. Terson syndrome

21. Thank you for your attention