Endovascular straightening of the internal carotid artery during mechanical thrombectomy: The "tightrope technique".

Abstract

Mechanical thrombectomy is a standard treatment for acute stroke, but it can be technically challenging in elderly patients with difficult vascular anatomy. To overcome this issue, we propose a new endovascular approach called the "tightrope" technique. This technique uses a stiff guidewire and a standard angiographic catheter to straighten the internal carotid artery (ICA) tortuosity, allowing the guiding catheter to be positioned next to the intracranial level. We retrospectively evaluated all the procedures in which the "tightrope" technique was used. This approach involves advancing a 0.035″ Advantage stiff guidewire and a standard 4 Fr angiographic catheter through the vascular tortuosity. The catheter is twisted over the guide wire in a clockwise direction, gaining tension that gradually straightens the vascular axis, allowing the guiding catheter to pass up to the distal ICA. Between June 2022 and March 2023, we successfully performed consecutive mechanical thrombectomy procedures using the tightrope technique in 11 patients with highly tortuous ICA segments. In all cases, we were able to safely advance the catheter system up to the distal cervical ICA. Although our study included a small cohort of patients, the "tightrope" technique proved to be successful in all patients, allowing for safe advancement of the guiding catheter toward extremely tortuous anatomy. However, further validation in a larger patient population is necessary to determine the technique's effectiveness and safety profile.