Tag Archives: fluid

Intraosseous hypertonic saline is probably safe

A previous study on swine with uncontrolled haemorrhagic shock who were given intraosseous (IO) hypertonic saline demonstrated a high rate of complications such as soft tissue necrosis and venous thrombosis(1). This led to a recommendation of caution in patients requiring … Continue reading

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RCT of 7.5% saline in head injury

Over a thousand patients in North America with blunt traumatic head injury and coma who did not have hypovolaemic shock were randomised to different fluids pre-hospital. 250 ml Hypertonic (7.5%) saline was compared with normal (0.9%) saline and hypertonic saline … Continue reading

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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

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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

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