RT Journal Article
SR Electronic
T1 Early Postmarket Results with EmboTrap II Stent Retriever for Mechanical Thrombectomy: A Multicenter Experience
JF American Journal of Neuroradiology
JO Am. J. Neuroradiol.
FD American Society of Neuroradiology
SP 904
OP 909
DO 10.3174/ajnr.A7067
VO 42
IS 5
A1 Srivatsan, A.
A1 Srinivasan, V.M.
A1 Starke, R.M.
A1 Peterson, E.C.
A1 Yavagal, D.R.
A1 Hassan, A.E.
A1 Alawieh, A.
A1 Spiotta, A.M.
A1 Saleem, Y.
A1 Fargen, K.M.
A1 Wolfe, S.Q.
A1 de Leacy, R.A.
A1 Singh, I.P.
A1 Maier, I.L.
A1 Johnson, J.N.
A1 Burkhardt, J.-K.
A1 Chen, S.R.
A1 Kan, P.
YR 2021
UL http://www.ajnr.org/content/42/5/904.abstract
AB BACKGROUND AND PURPOSE: EmboTrap II is a novel stent retriever with a dual-layer design and distal mesh designed for acute ischemic stroke emergent large-vessel occlusions. We present the first postmarket prospective multicenter experience with the EmboTrap II stent retriever.MATERIALS AND METHODS: A prospective registry of patients treated with EmboTrap II at 7 centers following FDA approval was maintained with baseline patient characteristics, treatment details, and clinical/radiographic follow-up.RESULTS: Seventy patients were treated with EmboTrap II (mean age, 69.9 years; 48.6% women). Intravenous thrombolysis was given in 34.3%, and emergent large-vessel occlusions were located in the ICA (n = 18), M1 (n = 38), M2 or M3 (n = 13), and basilar artery (n = 1). The 5 × 33 mm device was used in 88% of cases. TICI ≥ 2b recanalization was achieved in 95.7% (82.3% in EmboTrap II–only cases), and first-pass efficacy was achieved in 35.7%. The NIHSS score improved from a preoperative average of 16.3 to 12.1 postprocedure and to 10.5 at discharge. An average of 2.5 [SD, 1.8] passes was recorded per treatment, including non-EmboTrap attempts. Definitive treatment was performed with an alternative device (aspiration or stent retriever) in 9 cases (12.9%). Some hemorrhagic conversion was noted in 22.9% of cases, of which 4.3% were symptomatic. There were no device-related complications.CONCLUSIONS: Initial postmarket results with the EmboTrap II stent retriever are favorable and comparable with those of other commercially available stent retrievers. Compared with EmboTrap II, the first-generation EmboTrap may have a higher first-pass efficacy; however, data are limited by retrospective case analysis, incomplete clinical follow-up, and small sample size, necessitating future trials.AISacute ischemic strokeBGCballoon-guide catheterFPEfirst-pass efficacyLKNlast known healthysICHsymptomatic intracerebral hemorrhage