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Tag Archives: vascular access
Vascular & Osseous Access in Resuscitation
Cliff Reid and Geoff Healy discuss challenges in prehospital intraosseous and intravenous access, covering how to avoid pitfalls and what their own individual practice preferences are in the prehospital and in-hospital settings (22 mins).
Two smaller lines may be quicker
Using Poiseuille’s law and standardized gauge sizes, an 18-gauge (g) intravenous catheter (IV) should be 2.5 times faster than a 20-g IV, but this is not borne out by observation, in vitro testing, and manufacturer’s data. A nice simple study … Continue reading
External jugular vein a tricky one
Emergency medicine residents and paramedics cannulated patients who were anaesthetised. The external jugular vein (EJV) took longer to cannulate and had a higher failure rate than an antecubital vein. More than a quarter of the paramedics and a third of … Continue reading
Fluid Flow Through Intravenous Cannulae
Published flow rates for cannulae are derived from a test in which fluid runs through a perfectly straight cannula into an open receptacle. Laminar flow is expected in such a model in which the Hagen-Poisseuille formula tells us that flow … Continue reading