An experimental aneurysm model: a training model for neurointerventionalists

Area of Science:

• Vascular Surgery
• Interventional Radiology
• Pre-clinical Research

Background:

• Reproducible animal models are crucial for evaluating aneurysm therapies.
• Such models also aid in training for complex interventional procedures.

Purpose of the Study:

• To establish a reliable animal model for testing endovascular aneurysm occlusion techniques.
• To assess the efficacy of GDC-Coils for aneurysm embolization.
• To evaluate the model's utility for interventional training.

Main Methods:

• Aneurysms were created in 35 New Zealand White rabbits using elastase infusion.
• Endovascular embolization was performed using GDC-Coils in 27 aneurysms.
• Microcatheter placement times were recorded for professionals, semi-professionals, and trainees.
• Angiographic and histological assessments evaluated occlusion rates and long-term outcomes.

Main Results:

• Aneurysms (2-6 mm) were reliably created in all rabbits.
• An average angiographic occlusion rate of 89.5% was achieved.
• Histology confirmed no recanalization in embolized aneurysms, while controls remained patent.
• Trainees showed significant improvement in catheter placement time, nearing professional proficiency.

Conclusions:

• The rabbit model is effective for pre-clinical assessment of aneurysm therapies and endovascular devices.
• This model provides a valuable platform for training interventionalists in aneurysm occlusion techniques.
• The model allows for evaluation of embolization devices, long-term prognosis, and device effects.