RT Journal Article
SR Electronic
T1 Arterial Collapse during Thrombectomy for Stroke: Clinical Evidence and Experimental Findings in Human Brains and In Vivo Models
JF American Journal of Neuroradiology
JO Am. J. Neuroradiol.
FD American Society of Neuroradiology
SP 251
OP 257
DO 10.3174/ajnr.A7389
VO 43
IS 2
A1 Y. Liu
A1 D. Gebrezgiabhier
A1 Y. Zheng
A1 A.J. Shih
A1 N. Chaudhary
A1 A.S. Pandey
A1 J.L.A. Larco
A1 S.I. Madhani
A1 M. Abbasi
A1 A.H. Shahid
A1 R.A. Quinton
A1 R. Kadirvel
A1 W. Brinjikji
A1 D.F. Kallmes
A1 L.E. Savastano
YR 2022
UL http://www.ajnr.org/content/43/2/251.abstract
AB BACKGROUND AND PURPOSE: Aspiration thrombectomy has become a preferred approach to recanalize large-vessel occlusion in stroke with a growing trend toward using larger-bore catheters and stronger vacuum pumps. However, the mechanical response of the delicate cerebral arteries to aspiration force has not been evaluated. Here, we provide preclinical and clinical evidence of intracranial arterial collapse in aspiration thrombectomy.MATERIALS AND METHODS: We presented a clinical case of arterial collapse with previously implanted flow diverters. We then evaluated the effect of vacuum with conventional aspiration catheters (with and without stent retrievers) in a rabbit model (n = 3) using fluoroscopy and intravascular optical coherence tomography. Then, in a validated human cadaveric brain model, we conducted 168 tests of direct aspiration thrombectomy following an experimental design modifying the catheter inner diameter (0.064 inch, 0.068 inch, and 0.070 inch), cerebral perfusion pressures (mean around 60 and 90 mm Hg), and anterior-versus-posterior circulation. Arterial wall response was recorded and graded via direct transluminal observation.RESULTS: Arterial collapse was observed in both the patient and preclinical experimental models. In the human brain model, arterial collapse was observed in 98% of cases in the M2 and in all the cases with complete proximal flow arrest. A larger bore size of the aspiration catheter, a lower cerebral perfusion pressure, and the posterior circulation in comparison with the anterior circulation were associated with a higher probability of arterial collapse.CONCLUSIONS: Arterial collapse does occur during aspiration thrombectomy and is more likely to happen with larger catheters, lower perfusion pressure, and smaller arteries.ACSarterial collapse scoreBAbasilar arteryMAPmean arterial pressureOCToptical coherence tomography