The Trevo device: preclinical data of a novel stroke thrombectomy device in two different animal models of arterial thrombo-occlusive disease
Department of Radiology
Neurology | Radiology | Surgery
BACKGROUND: The currently available mechanical devices fail to achieve recanalization in as many as 20-40% of proximal arterial occlusion strokes.
OBJECTIVE: The preclinical evaluation of the safety and efficacy of a novel thrombectomy device designed to achieve immediate flow restoration by quickly removing clot is reported.
METHODS: Four confirmatory animal studies were performed with the Trevo device (Concentric Medical Inc, Mountain View, California, USA) in the swine (n=2) and canine (n=1) models of arterial thrombo-occlusive disease employing autologous thrombin generated thrombi. The angiographic response and the degree of device-clot incorporation were evaluated. High resolution flat panel three-dimensional CT was performed to further define the in vivo device-thrombus-vessel interaction. Finally, samples of three swine vessels treated with six passes of the device were explanted for histopathological analysis. RESULTS: A total of 16 clots of variable hardness and consistency were implanted in a variety of vascular settings, including the swine internal maxillary, lingual and forelimb arteries as well as the canine external carotid and vertebral arteries. Thrombolysis in Myocardial Infarction (TIMI) 2-3 reperfusion was achieved in all cases immediately after device deployment. All 16 clots were retrieved after one (n=15) or two (n=1) passes with the device. Histopathological analysis demonstrated severe disruption of the intima but no hemorrhage of media or adventitia.
CONCLUSION: The experimental data suggest that the Trevo device is highly effective at achieving immediate reperfusion of occluded arteries without causing any clinically significant disruption of vascular integrity.
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Citation: J Neurointerv Surg. 2012 Jul;4(4):295-300. Epub 2011 Aug 20. Link to article on publisher's site
Nogueira, Raul G.; Levy, Elad I.; Gounis, Matthew J.; and Siddiqui, Adnan H., "The Trevo device: preclinical data of a novel stroke thrombectomy device in two different animal models of arterial thrombo-occlusive disease" (2012). Radiology Publications and Presentations. 299.