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Updated: Aug 7, 2026
06:38
The Stroke Preclinical Assessment Network Multi-Laboratory Model of Thromboembolic Stroke with Thrombolysis: TE-MCAo
Published on: December 19, 2025
A dedicated animal model for mechanical thrombectomy in acute stroke
J Gralla1, G Schroth, L Remonda
1Department of Interventional and Diagnostic Neuroradiology, Inselspital, University of Bern, Freiburgstrasse 4, CH-3010 Bern, Switzerland.
AJNR. American Journal of Neuroradiology
|June 16, 2006
Summary
A novel swine model allows visualization of mechanical thrombectomy for acute stroke. This model enables evaluation of clot retrieval devices and thrombus behavior during endovascular interventions.
Area of Science:
- Neuroscience
- Medical Devices
- Vascular Surgery
Background:
- Mechanical thrombectomy is crucial for acute stroke revascularization.
- A need exists for systematic evaluation of mechanical thrombectomy devices.
- Current endovascular interventions lack standardized in vivo models for device assessment.
Purpose of the Study:
- To develop and validate an in vivo swine model for mechanical thrombectomy.
- To enable visualization of thrombus behavior during endovascular procedures.
- To facilitate the evaluation of mechanical thrombectomy devices in acute stroke.
Main Methods:
- An in vivo swine model using preformed thrombi was established (n=8).
- Thrombi were generated from autologous blood and thrombin, with barium sulfate for radiographic visualization.
- Angiography and embolization techniques were employed to simulate acute stroke conditions.
Main Results:
- The model demonstrated thrombus stability, reproducibility, and excellent radiographic visibility.
- Selective embolization was achieved without thrombus fragmentation.
- No local or systemic reactions to barium sulfate were observed, with no histological evidence of intimal damage.
Conclusions:
- The developed swine model reliably simulates acute cerebrovascular stroke conditions for thromboembolization.
- It provides crucial visualization of thrombus and device dynamics during endovascular intervention.
- This model is valuable for the development and evaluation of mechanical clot retrieval devices.
