Ocular ultrasound

Technique

• Use vascular/linear probe
• Plenty of ultrasound gel to decrease amount of pressure needed to place on eye

Elevated ICP

• Measure optic nerve 3mm posterior to the globe, from inner wall to inner wall
• Normal is <5mm

Globe Rupture

• Only perform if you can ensure that you do not put pressure on the globe
• Findings
  • Decrease in size of globe
  • Anterior chamber collapse
  • Vitreous hemorrhage
  • Buckling of the sclera
• see Globe Rupture

Intraocular Foreign Body

• Bright, echogenic acoustic profile w/ associated shadowing or reverberation

Retinal Detachment

• Echogenic undulating membrane in the posterior globe, protruding into the vitreous
• Evaluate with patient moving eye left/right
• SN 97-100% and SP 83-100%

Retinal detachment ultrasound

Vitreous Hemorrhage

• Vitreous filled with multiple large echoes
• Increasing the gain is helpful for detecting acute hemorrhages

vitreous hemorrhage

See Also

Ultrasound (Main)

External Links

Ultrasound Podcast - Chris Fox Ultrasound Village - The Eye

Source

Sonoguide