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Novel Technique for Detection of Actual Position of Clot During Endovascular Clot Retrieval: Assessment of Microcatheter Withdrawing Angiography.

Abstract：

BACKGROUND:When endovascular clot retrievals are performed using a stent retriever and/or an aspiration catheter, identifying the accurate position of a clot is extremely important for a successful immediate recanalization. Herein, we report a new technique called microcatheter withdrawing angiography, which facilitates the identification of the precise position of a clot. The negative shadow appearance of the clot on angiography was referred to as the actual crab claw sign. METHODS:When a 0.027-inch microcatheter penetrated the clot after inserting a 0.014-inch microwire, selective angiography was conducted using the microcatheter. Simultaneously, the microcatheter was slowly withdrawn with continuous contrast media injection, while the microwire was kept in the distal vessel. The precise position of the clot was found, which was referred to as the actual crab claw sign. Next, we conducted in vitro and in vivo analyses. RESULTS:The actual crab claw sign could be identified in the vascular model and in actual clinical settings. Therefore the sweet spot of the stent retriever could be set over the clot, and an accurate contact aspiration could be performed using an aspirator. CONCLUSIONS:Microcatheter withdrawing angiography can help identify the actual crab claw sign. This technique has a higher success rate and faster recanalization than conventional strategy, particularly in challenging cases of unsuccessful recanalization during the first attempt.

journal_name

World Neurosurg

journal_title

World neurosurgery

authors

Ohshima T,Niwa A,Kawaguchi R,Matsuo N,Miyachi S

doi

10.1016/j.wneu.2020.01.233

subject

Has Abstract

pub_date

2020-05-01 00:00:00

pages

229-234

eissn

1878-8750

issn

1878-8769

pii

S1878-8750(20)30251-5

journal_volume

137

pub_type

杂志文章

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