Critical Limb-Threatening Ischaemia

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.

Mental health disorders are common in older people and are often unrecognised. Those living with mental health disorders who are being considered for vascular surgery have worse post operative outcomes, including longer length of hospital stay, higher readmission rates and emergency admissions to hospital. These patients also have more medical conditions contributing to their post surgery complications and poor health outcomes. Surgery for vascular patients can include life changing operations, such as amputation, which impacts mental health and quality of life. Shared decision making is the process whereby patients and clinicians work together to make evidence based decisions centred on patient values and preferences and is part of the Comprehensive Geriatric Assessment and optimisation (CGA) model of care. SDM has been shown to improve patient experience through provision of realistic choice, enhanced interaction with clinicians, greater empowerment and increased confidence and trust in healthcare provision. Implementing SDM in vascular patients can be particularly challenging. Evaluating and communicating benefits and risks of available treatments for CLTI in a complex older patient population requires additional consideration beyond the inherent surgical risks. To achieve truly informed SDM, the clinician requires knowledge of the impact of co-existing conditions on postoperative recovery, the natural history of the surgical pathology with and without surgery and an awareness of the benefits and risks of alternative treatments underpinned by skilful communication.