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A retrospective study to determine if accessing frequency affects the incidence of microbial colonisation in peripheral arterial catheters


Koh, DBC and Robertson, IK and Watts, M and Davies, AN, A retrospective study to determine if accessing frequency affects the incidence of microbial colonisation in peripheral arterial catheters, Anaesthesia and Intensive Care, 38, (4) pp. 678-684. ISSN 0310-057X (2010) [Refereed Article]

DOI: doi:10.1177/0310057X1003800410


Peripheral arterial catheters are used for the continuous monitoring of blood pressure and repeated blood sampling in critically ill patients, but can be a source of catheter-related bloodstream infection. A common assumption is that the more frequently an arterial catheter is accessed, the greater the likelihood of contamination and colonisation to occur. We sought to determine whether the accessing frequency has an influence on the rate of colonisation in a peripheral arterial catheter. A retrospective, unmatched, nested case control study was conducted in our intensive care unit. The intensive care unit charts of 96 arterial catheters from 83 patients were examined to measure the number of times each respective arterial catheter was accessed. Multivariate Cox proportional hazards regression was used to compare the rate of accessing of arterial catheters and account for varying arterial catheter in situ duration. Arterial catheters which had a high access rate of 8.1 or more times/day (five colonised of 32 patients: hazards ratio 1.69, 95% confidence interval 0.52 to 5.49; P=0.77), or a medium access rate of 6.7 to 8.0 times/day (six colonised of 32 patients: hazards ratio, 1.35, 95% confidence interval, 0.37 to 4.92: P=0.65) were not significantly more colonised when compared to arterial catheters which had a low access rate of 0 to 6.6 times/day (six colonised of 32 patients), adjusted for arterial catheter insertion site and place in hospital where the arterial catheter insertion was performed. We were unable to demonstrate that the accessing frequency of an arterial catheter was a major predisposing factor for the likelihood of colonisation. Other mechanisms other than hub colonisation should be investigated further.

Item Details

Item Type:Refereed Article
Research Division:Biomedical and Clinical Sciences
Research Group:Clinical sciences
Research Field:Intensive care
Objective Division:Health
Objective Group:Clinical health
Objective Field:Clinical health not elsewhere classified
UTAS Author:Koh, DBC (Mr David Koh)
UTAS Author:Robertson, IK (Dr Iain Robertson)
UTAS Author:Watts, M (Dr Marianne Watts)
UTAS Author:Davies, AN (Dr Andrew Davies)
ID Code:67339
Year Published:2010
Web of Science® Times Cited:4
Deposited By:Health Sciences A
Deposited On:2011-03-02
Last Modified:2014-11-21

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