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Vasospasm due to massive subarachnoid haemorrhage--a rat model
1Department of Neurosurgery, Chaim Sheba Medical Center, Sackler School of Medicine, Tel-Hashomer, Israel.
Acta Neurochirurgica
|January 1, 1991
Summary
This study demonstrates that inducing massive subarachnoid hemorrhage (SAH) in rats reliably causes cerebral vasospasm. The basilar artery diameter significantly reduced, validating this model for SAH research.
Area of Science:
- Neuroscience
- Vascular Biology
- Surgical Models
Background:
- Cerebral vasospasm is a serious complication following subarachnoid hemorrhage (SAH).
- The exact pathophysiology of chronic cerebral vasospasm remains unclear.
- The volume of subarachnoid blood correlates with vasospasm severity.
Purpose of the Study:
- To establish a reliable rat model for investigating subarachnoid hemorrhage-induced cerebral vasospasm.
- To quantify arterial diameter changes following induced SAH.
Main Methods:
- Massive SAH was induced in adult rats by injecting >0.5 ml blood into the cisterna magna.
- Basilar artery diameter was measured 72 hours post-SAH using an image analyzer.
- Control groups included rats with intracisternal saline injection and unmanipulated rats.
Main Results:
- Rats with induced SAH exhibited a 50% reduction in basilar artery diameter.
- This significant reduction was observed compared to control groups.
- The model successfully replicated arterial vasospasm post-SAH.
Conclusions:
- Massive SAH induction in rats provides a reliable model for studying cerebral vasospasm.
- Direct measurement of the basilar artery diameter is a valid assessment method.
- This model facilitates further investigation into SAH-induced arterial vasospasm mechanisms.