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Optic nerve decompression improves hemodynamic parameters in papilledema

R A Mittra1, R C Sergott, P M Flaharty

  • 1Neuro-Ophthalmology Service, Wills Eye Hospital, Philadelphia, PA.

Ophthalmology
|July 1, 1993
PubMed
Summary
This summary is machine-generated.

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Optic nerve sheath decompression (ONSD) may improve vision in pseudotumor cerebri (PTC) by reversing impaired retrobulbar circulation and reducing ischemia. This study examined Doppler imaging parameters before and after ONSD surgery.

Area of Science:

  • Ophthalmology
  • Neurology
  • Vascular Imaging

Background:

  • Chronic papilledema due to pseudotumor cerebri (PTC) can lead to vision loss.
  • Retrobulbar circulation impairment is suspected in PTC-related visual deficits.

Purpose of the Study:

  • To evaluate changes in color Doppler imaging parameters post-optic nerve sheath decompression (ONSD) for chronic papilledema in PTC patients.
  • To correlate these hemodynamic changes with visual outcomes.

Main Methods:

  • Color Doppler imaging of ophthalmic, central retinal, and short posterior ciliary arteries performed pre- and post-ONSD.
  • Pulsed Doppler spectrum analysis to assess blood flow velocities and pulsatility index.

Main Results:

Related Experiment Videos

  • Pre-operative decreased blood flow velocities in retrobulbar arteries were observed, correlating with visual acuity.
  • Post-ONSD, significant improvements in Doppler parameters were noted in eyes with improved vision.
  • Ophthalmic artery diastolic velocity increased, while central retinal artery parameters showed no significant change post-surgery.

    • Conclusions:

    • Impaired retrobulbar circulation and ischemia may contribute to vision loss in chronic papilledema.
    • ONSD may improve visual function by ameliorating these ischemic processes.
    • Color Doppler imaging can help assess the impact of ONSD on retrobulbar hemodynamics.