A guide to purchasing of intravenous cannulae
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Abstract
Background
There are wide variations in the physical designs and attributes between different brands of intravenous cannulae that makes product selection and purchasing difficult. In a systematic assessment to guide purchasing, we assessed two cannulae – Cannula P and I. We proposed that the results of in-vitro performance testing of the cannulae would be associated with preference after clinical comparison.

Methods
We designed an observer-blinded randomised head-to-head trial between the 18, 20 and 22 gauge versions of Cannula P and I. Our primary end-point was pressure (mmHg) generated during various flow rates and our secondary end-point was the force (Newton) required to slide the catheter away from the needle. This was followed by a prospective electronic survey following a two-week clinical trial period.

Conclusions
The evaluation process described here could help hospitals improve efficient product selection and purchasing decisions for intravenous cannulae....

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3882495/#!po=34.6154
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