Caren van Roekel

233 Use of an anti-reflux catheter in 166 Ho-radioembolization FIGURE 1. Schematic representation of within-patient randomized treatment with a standard microcatheter in the right hepatic artery and an anti-reflux catheter in the left hepatic artery. First-generation anti-reflux systems were used until August 2017 and were then replaced by the second-generation anti-reflux systems. On the day of treatment, randomization was disclosed to the interventional radiologist. Two types of anti-reflux catheters were used during the study period. The first version of the Surefire® anti-reflux catheter (TriSalus Life Sciences, Westminster, CO, USA) was initially used, but this catheter became unavailable during the course of the study. Since January 2018, the updated Surefire® Precision infusion system was used. The standard microcatheter was a Progreat 2.4F or 2.7F microcatheter (Terumo Europe NV, Leuven, Belgium). 9