Quality Improvement Quality Improvement Resources Useful resources and links for quality improvement in healthcare VSGBI Peripheral Arterial Disease Quality Improvement Framework The Peripheral Arterial Disease QIF (PAD-QIF) aims to reduce the delays in assessment, investigation, and revascularisation in patients with critical limb ischaemia and in turn amputation rates. VSGBI PAD Quality Improvement Programme The PAD QIP's aim is to improve the quality of care for patients presenting with critical limb-threatening ischaemia (CLTI) by developing a quality improvement collaborative of healthcare professionals across the UK.