Utility of Coaxial Angioplasty-thrombectomy for Acute Tandem Occlusion of Intracranial and Extracranial Arteries.

Objective: We report a novel technique for acute occlusion of both intracranial and extracranial arteries (tandem lesions [TL]). Case Presentation: A 67-year-old male was transferred to our hospital because of right hemiparesis and aphasia. MRA revealed occlusion of the left cervical internal carotid artery (ICA) and middle cerebral artery (MCA). A balloon guide catheter (BGC) was advanced into the left common carotid artery (CCA). A microcatheter was advanced over a microwire through the intracranial thrombus. A stent retriever (SR) was deployed from the MCA to the ICA through the microcatheter. Next, with the SR anchored to the thrombus, the microcatheter was withdrawn. The extracranial percutaneous transluminal angioplasty (PTA) balloon was coaxially advanced over the SR's delivery wire and angioplasty was performed. Then, an aspiration catheter was coaxially advanced to the proximal aspect of the intracranial thrombus over the delivery wire by pump aspiration. We removed the SR and the aspiration catheter as a single unit into the BGC, resulting in sufficient recanalization. The puncture to recanalization time was 29 minutes. Conclusion: This technique can lead to faster recanalization in cases of TL.