jinjection tests operating the syringe manually, also in reverse flux, to verify the absence of obstructions and damages.Thereafter, the injection syringe was mounted on a programmable, step-by-step motor driven syringe pump system which was set at different constant volumetric flow rates, ranging from 0.05 ml/min to 1.12 ml/min according to material and methods, section "Handling of microcatheters with PVA MBs for insertion in microfluidic channels"