DCB Outcomes After Non-Compliant Balloon Vessel Preparation With or Without Scoring in Patients With Femoropopliteal Arterial Disease

The aim of this clinical trial is to determine whether vessel preparation with a non-compliant scoring balloon before drug-coated balloon (DCB) angioplasty provides superior procedural and clinical outcomes compared with vessel preparation using a non-compliant plain balloon in patients with chronic limb-threatening ischaemia (CLTI) undergoing femoropopliteal endovascular intervention. The main questions the study aims to answer are: * Does non-compliant scoring balloon vessel preparation reduce the need for bailout stenting during the index procedure? * Does it improve primary patency after DCB angioplasty? * Does it improve clinically relevant outcomes such as wound healing, freedom from clinically driven target lesion revascularisation, limb salvage and health-related quality of life? * Does it provide procedural and economic advantages compared with non-compliant plain balloon vessel preparation? Participants will be randomly assigned to undergo vessel preparation using either a non-compliant plain balloon or the DKutting™ non-compliant scoring balloon, followed by angioplasty with the Legflow XP™ drug-coated balloon. Patients will undergo clinical, duplex ultrasound and quality-of-life follow-up for 24 months.