Abstract
This PhD project is a mixed-methods study exploring the complications, risks, and experiences associated with peripheral intravenous catheters (PIVCs) in hospitalised older adults. Although PIVCs are the most frequently used invasive device in hospitals, their failure can lead to significant patient harm, particularly in older people who are more susceptible due to physiological ageing and chronic health conditions. This study aims to generate a comprehensive understanding of PIVC-related outcomes in this population by examining failure incidence and risk factors through secondary data analysis and capturing patient experiences through qualitative interviews. This mixed-methods research project addresses a critical gap in the evidence by combining a scoping review, secondary quantitative analysis of hospital data, and qualitative interviews with older adults. Findings will provide an understanding of PIVC failure and its impact on both clinical outcomes and patient experience. Insights from this study will help inform evidence-based clinical guidelines and support more person-centred vascular access care for our ageing population.