A canine model of acute hindbrain ischemia and reperfusion

J. Guo, J. J. Liao, J. K. Preston, H. H. Batjer, W. R. Selman, M. R. Mayberg

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

ANIMAL MODELS OF brain stem ischemia are needed for pathophysiological study and evaluation of treatment; few such models are available currently. A new canine model of hindbrain ischemia and reperfusion is introduced in this article. Through an anterior cervical approach, the basilar artery was surgically exposed in 18 dogs. The posterior communicating and superior cerebellar arteries were embolized with cyanoacrylate glue to isolate the posterior circulation from the anterior circulation. Reversible hindbrain ischemia was induced in 14 dogs by the temporary clipping of the vertebral and ventral spinal arteries for various periods (10-30 min), then the clips were removed and reperfusion was achieved for 5 hours. In all 14 dogs, the hindbrain ischemia was confirmed by the decreased perfusion pressure in the basilar artery (< 10 mm Hg), the diminished regional cerebral blood flow as measured with a laser Doppler flowmeter at the medulla oblongata (< 10 ml/100 g/min), the flattened brain stem auditory evoked potentials, and the increased leakage of Evans blue dye from tissue. These parameters did not change in the four control dogs. The changes in brain stem auditory evoked potentials were closely related to the length of ischemic interval; after 10 minutes of ischemia, reperfusion fully reversed the changes in brain stem auditory evoked potentials, but 20-minute and 30-minute ischemic intervals partially or totally depleted the brain stem auditory evoked potentials. Delayed postischemic hypoperfusion occurred in all five dogs that underwent the 30-minute ischemic interval. The early physiological changes in this model allowed us to estimate the severity of brain stem ischemia and the resulting damage. This model may be useful for studying the effectiveness of brain-protective strategies against brain stem ischemia, particularly in the cases of 20-minute and 30-minute ischemic intervals.

Original languageEnglish (US)
Pages (from-to)986-993
Number of pages8
JournalNeurosurgery
Volume36
Issue number5
StatePublished - 1995

Fingerprint

Rhombencephalon
Brain Stem Auditory Evoked Potentials
Reperfusion
Canidae
Ischemia
Dogs
Brain Ischemia
Brain Stem
Basilar Artery
Cerebrovascular Circulation
Arteries
Cyanoacrylates
Flowmeters
Evans Blue
Medulla Oblongata
Regional Blood Flow
Surgical Instruments
Adhesives
Lasers
Coloring Agents

Keywords

  • Animal model
  • Brain stem
  • Cerebral ischemia
  • Dogs
  • Evoked potentials

ASJC Scopus subject areas

  • Clinical Neurology
  • Surgery

Cite this

Guo, J., Liao, J. J., Preston, J. K., Batjer, H. H., Selman, W. R., & Mayberg, M. R. (1995). A canine model of acute hindbrain ischemia and reperfusion. Neurosurgery, 36(5), 986-993.

A canine model of acute hindbrain ischemia and reperfusion. / Guo, J.; Liao, J. J.; Preston, J. K.; Batjer, H. H.; Selman, W. R.; Mayberg, M. R.

In: Neurosurgery, Vol. 36, No. 5, 1995, p. 986-993.

Research output: Contribution to journalArticle

Guo, J, Liao, JJ, Preston, JK, Batjer, HH, Selman, WR & Mayberg, MR 1995, 'A canine model of acute hindbrain ischemia and reperfusion', Neurosurgery, vol. 36, no. 5, pp. 986-993.
Guo J, Liao JJ, Preston JK, Batjer HH, Selman WR, Mayberg MR. A canine model of acute hindbrain ischemia and reperfusion. Neurosurgery. 1995;36(5):986-993.
Guo, J. ; Liao, J. J. ; Preston, J. K. ; Batjer, H. H. ; Selman, W. R. ; Mayberg, M. R. / A canine model of acute hindbrain ischemia and reperfusion. In: Neurosurgery. 1995 ; Vol. 36, No. 5. pp. 986-993.
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