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Related Experiment Videos

Experimental delayed postischemic spinal cord hypoperfusion after aortic cross-clamping

F Follis1, K Miller, O U Scremin

  • 1Department of Thoracic and Cardiovascular Surgery, University of New Mexico, Albuquerque 87131, USA.

The Canadian Journal of Neurological Sciences. Le Journal Canadien Des Sciences Neurologiques
|August 1, 1995
PubMed
Summary

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Competitive NMDA receptor antagonists and spinal-cord ischemia.

Journal of investigative surgery : the official journal of the Academy of Surgical Research·2000

This study reveals delayed hypoperfusion in rat spinal cord segments for 6 hours after ischemia, impacting neural tissue survival. Understanding this spinal cord blood flow (SCBF) defect is crucial for potential therapeutic interventions.

Area of Science:

  • Neuroscience
  • Vascular Biology
  • Ischemia Research

Background:

  • Microcirculatory defects are suspected during reperfusion following spinal cord ischemia.
  • This study investigates blood flow dynamics in the post-ischemic rat spinal cord.

Purpose of the Study:

  • To delineate spinal cord blood flow (SCBF) dynamics during and after aortic and subclavian artery cross-clamping (XC) in rats.
  • To identify potential periods of hypoperfusion in different spinal cord regions.

Main Methods:

  • Male Sprague-Dawley rats underwent 11-minute aortic and subclavian artery cross-clamping (XC).
  • Spinal cord blood flow (SCBF) was measured using autoradiography in cervical, thoracic, and lumbar regions at various time points post-XC.
  • Control groups included sham surgeries without XC and subclavian artery-only clamping.

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Main Results:

  • Thoracic cord SCBF was reduced during XC and up to 6 hours post-XC compared to controls.
  • Lumbar cord SCBF was undetectable during XC and significantly depressed at 1 and 6 hours post-XC.
  • Cervical cord SCBF showed no significant differences from controls at any measured time point.

Conclusions:

  • A delayed hypoperfusion phenomenon was demonstrated in the thoracic and lumbar spinal cord segments for up to 6 hours after XC.
  • This post-ischemic hypoperfusion may significantly influence the viability of neural elements affected by ischemic injury.