Tay S, Spain B, Morandell K, Gilson J, Weinberg L, Story D. Functional evaluation and practice survey to guide purchasing of intravenous cannulae.
BMC Anesthesiol 2013;
13:49. [PMID:
24364899 PMCID:
PMC3882495 DOI:
10.1186/1471-2253-13-49]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Accepted: 12/20/2013] [Indexed: 11/18/2022] Open
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.
Results
The mean difference in resistance between Cannula P and I was: 307 mmHg.L-1.hr-1 (95% CI: 289–325, p < 0.001) for 22G; 135 mmHg.L-1.hr-1 (95% CI: 125–144, p < 0.001) for 20G; and 27 mmHg.L-1.hr-1 (95% CI: 26–28, p < 0.001) for 18G. The mean difference in the force needed to displace the catheter away from its needle was: 1.41 N (95% CI: 1.09-1.73, p < 0.001) for 22G; 0.19 N (95% CI: -0.04-0.41, p = 0.12) for 20G; and 1.96 N (95% CI: 1.40-2.52, p < 0.001) for 18G. After a trial period, all 16 anaesthetist who had used both cannulae preferred Cannula I to P.
Conclusions
The evaluation process described here could help hospitals improve efficient product selection and purchasing decisions for intravenous cannulae.
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