Intra-arterial catheters: An evidence-based review of device design, function and application

The intra-arterial catheter is a fundamental tool in contemporary critical care medicine. Intra-arterial catheters are widely used for a range of diagnostic and therapeutic purposes, and catheter insertion is an important clinical skill for clinicians managing critically unwell patients. The concepts and practical implications of catheter design on procedural technique and outcomes are frequently overlooked. This narrative review describes the clinical application of arterial catheters, the evidence supporting their use, and the rationale for key device characteristics.