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Neuroradiology
Published in: Neuroradiology 10/2023

17-07-2023 | Silicone | Interventional Neuroradiology

Evaluation of vessel injury after simulated catheter use in an endothelialized silicone model of the intracranial arteries

Authors: Alyssa McCulloch, Brianna Yang, Sergey Frenklakh, Pratika Sah, Kristen O’Halloran Cardinal

Published in: Neuroradiology | Issue 10/2023

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Abstract

Purpose

Neurothrombectomy catheters can disrupt or injure the vessel wall. This potential injury is often studied in animal or cadaver models, but prior work suggests that endothelialized silicone models may be an option for early in vitro assessment. The purpose of this work was to create a complex, clinically-relevant endothelialized neurovascular silicone model, and to determine the utility of the model for evaluating vessel injury due to catheter simulated use.

Methods

Models of the ICA and MCA were fabricated out of silicone, sterilized, coated with fibronectin, placed in bioreactors, and endothelialized with HUVECs. These silicone vessels were maintained under flow for 3 and 7 days, and cellular linings were assessed. Subsequently, 24 silicone vessels were created and treated with neurovascular catheters. Vessels were accessed with a guidewire, microcatheter, and/or aspiration catheter, either once (1-pass) or three times (3-pass). Vessels were then fixed, and injury was evaluated through quantitative image analysis and a visual scoring system.

Results

Complex silicone models were successfully endothelialized and maintained with consistent cell linings. The transparent silicone permitted catheter simulated use without fluoroscopy, and injury to the vessel wall was observed and successfully imaged and characterized. Vessels subjected to 3-passes exhibited more injury than 1-pass, and injury increased with the number and size of devices. These results illustrated expected trends and support use of these models for early assessment of vessel injury.

Conclusion

Complex silicone neurovascular models can be endothelialized and used in vitro to assess and compare injury due to the use of neurovascular catheters.
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Metadata
Title
Evaluation of vessel injury after simulated catheter use in an endothelialized silicone model of the intracranial arteries
Authors
Alyssa McCulloch
Brianna Yang
Sergey Frenklakh
Pratika Sah
Kristen O’Halloran Cardinal
Publication date
17-07-2023
Publisher
Springer Berlin Heidelberg
Published in
Neuroradiology / Issue 10/2023
Print ISSN: 0028-3940
Electronic ISSN: 1432-1920
DOI
https://doi.org/10.1007/s00234-023-03197-8

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