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Related Experiment Videos

Assessment of delayed cerebral vasospasm using intracisternal echography--technical note

H Touho1, J Karasawa, H Ohnishi

  • 1Department of Neurosurgery, Osaka Neurological Institute, Japan.

Surgical Neurology
|October 1, 1995
PubMed
Summary

Intracranial ultrasound imaging can detect cerebral vasospasm after subarachnoid hemorrhage. This technique allows for intermittent diameter measurement of the middle cerebral artery to identify potential narrowing.

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Area of Science:

  • Neurology
  • Medical Imaging
  • Neurosurgery

Background:

  • Subarachnoid hemorrhage (SAH) poses a risk of cerebral vasospasm.
  • Intravascular ultrasound (IVUS) is a diagnostic tool for assessing arterial structures.
  • Previous applications of IVUS have focused on coronary arteries.

Purpose of the Study:

  • To evaluate the utility of an intracisternally placed ultrasound catheter for detecting cerebral vasospasm.
  • To obtain serial echo images of the middle cerebral artery (M1 segment) in patients with SAH.

Main Methods:

  • Thirteen patients with SAH underwent surgical aneurysm clipping.
  • An 8 Fr. ultrasound imaging catheter was positioned intracisternally near the M1 segment.
  • The catheter was secured using a cisternal drainage tube for stable placement.

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Main Results:

  • Angiographic vasospasm was confirmed in 23.1% of patients.
  • Ultrasound detected a diameter decrease in one patient with 25% stenosis.
  • Ultrasound did not detect diameter changes in two patients with 10% stenosis.

Conclusions:

  • An intracisternally positioned ultrasound catheter is feasible for monitoring cerebral artery diameter.
  • This method allows for intermittent assessment to detect cerebral vasospasm post-SAH.