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The piglet as a model for cerebral circulation: an angiographic study
K Haaland1, W J Orderud, M Thoresen
1Institute for Surgical Research, University of Oslo, Rikshospitalet, Norway.
Biology of the Neonate
|January 1, 1995
Summary
The newborn piglet is a limited model for studying neonatal cerebral ischemia due to robust collateral circulation. However, a modified carotid artery allows for cerebral blood flow measurements in piglets.
Area of Science:
- Neonatal physiology
- Cerebrovascular research
- Animal modeling
Background:
- The newborn piglet is frequently used to model neonatal brain injury.
- Understanding the piglet's cerebrovascular system is crucial for accurate modeling.
Purpose of the Study:
- To evaluate the newborn piglet as a model for neonatal cerebral circulation and injury.
- To identify the limitations and possibilities of using piglets in cerebrovascular research.
Main Methods:
- Cerebral and precerebral circulation visualization via aortic arch and selective arterial contrast injections.
- Assessment of ischemia induction by extracranial artery ligation.
- Development of a modified common carotid artery for blood flow measurement.
Main Results:
- The piglet's extensive collateral circulation prevents severe focal cerebral ischemia via extracranial artery ligation.
- A modified common carotid artery successfully perfuses intracerebral tissues.
- This modified artery allows for continuous cerebral blood flow monitoring.
Conclusions:
- The piglet model has limitations for inducing focal cerebral ischemia due to collateralization.
- A modified common carotid artery in piglets enables reliable cerebral blood flow measurements for neonatal research.