Cerebral Ischemic Coma Model Induced by Modified Four-Vessel Occlusion.

Area of Science:

• Neuroscience
• Surgical Techniques
• Ischemic Stroke Research

Background:

• Cerebral ischemic coma is a severe complication of cerebral ischemia.
• Current four-vessel occlusion models for inducing ischemic coma have limitations, including risks of bleeding, infection, and spinal cord damage.
• Existing methods often require multiple surgical procedures, increasing complexity and duration.

Purpose of the Study:

• To develop a refined, single-stage surgical method for establishing a reliable four-vessel occlusion model in rats.
• To mitigate the risks associated with conventional methods for inducing cerebral ischemic coma.
• To provide an improved model for studying cerebral ischemia and evaluating potential therapeutic interventions.

Main Methods:

• A single anterior cervical incision was utilized to access and electrocauterize bilateral vertebral arteries under direct visualization.
• Loose ligatures were placed around bilateral common carotid arteries.
• Ischemic coma was induced by rapidly ligating the common carotid arteries upon observing specific neurological signs (inversion reaction).

Main Results:

• The novel technique successfully induced ischemic coma in rats within a single surgical procedure.
• This method demonstrated a high success rate and reduced the risk of infection compared to multi-stage surgeries.
• It minimized risks of bleeding and damage to the brainstem and spinal cord.

Conclusions:

• The described single-stage surgical approach offers a safer, more efficient, and reliable method for creating a four-vessel occlusion-induced ischemic coma model in rats.
• This technique is advantageous for neurological disease research and drug development, offering a valuable alternative to existing protocols.
• The improved model facilitates further investigation into the pathophysiology and treatment of cerebral ischemia.