ObjectiveThe objective was to determine the prevalence of peripheral venous catheter (PVC) failure and its association with care complexity individual factors (CCIFs) in emergency department (ED) patients.DesignA cross-sectional, descriptive-correlational study was performed.MethodsAll patients with a PVC inserted in the ED of a tertiary hospital were included. The period of study was from June 2021 to June 2022. The main outcomes were PVC failure (phlebitis, extravasation/infiltration, dysfunction/occlusion and dislodgement/involuntary withdrawal) and 26 CCIFs categorised into 5 domains (psycho-emotional, mental-cognitive, sociocultural, developmental and comorbidity/complications). Other secondary variables were also collected, such as level of triage or nursing care plan. All data were collected retrospectively from the electronic health records. A descriptive and inferential analysis was performed.ResultsA total of 35 968 patients with one or more PVC inserted during their ED visit were included in the study. The prevalence of PVC failure was 0.9% (n=316). The statistically significant CCIFs associated with PVC failure were: incontinence, haemodynamic instability, transmissible infection, vascular fragility, anxiety and fear, impaired adaptation, consciousness disorders, lack of caregiver support and agitation. In addition, we identified that patients with a higher number of CCIFs were more frequently experienced PVC failure.ConclusionThis study identified a prevalence of PVC failure in the ED of around 1%. The most prevalent complication was dysfunction, followed by extravasation and dislodgement. In addition, PVC failure was associated with comorbidity/complications, psycho-emotional and mental-cognitive CCIFs domains.