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1 June 2007

Volume 44, Number 11
Clinical Infectious Diseases 2007;44:1408–1414
© 2007 by the Infectious Diseases Society of America. All rights reserved.
1058-4838/2007/4411-0002$15.00
DOI: 10.1086/517538
MAJOR ARTICLE

Outbreak of Bloodstream Infection Temporally Associated with the Use of an Intravascular Needleless Valve

Mark E. Rupp,1,4

Lee A. Sholtz,4

Dawn R. Jourdan,4

Nedra D. Marion,4

Laura K. Tyner,4

Paul D. Fey,2

Peter C. Iwen,2 and

James R. Anderson3

1Division of Infectious Diseases, Department of Internal Medicine, and Departments of 2Pathology and Microbiology and 3Preventive and Societal Medicine, University of Nebraska Medical Center, and 4Department of Healthcare Epidemiology, Nebraska Medical Center, Omaha, Nebraska

Background.Needleless intravascular catheter connector valves have been introduced into clinical practice to minimize the risk of needlestick injury. However, infection‐control risks associated with these valves may be underappreciated. In March 2005, a dramatic increase in bloodstream infections was noted in multiple patient care units of a hospital in temporal association with the introduction of a needleless valve into use.

Methods.Surveillance for primary bloodstream infection was conducted using standard methods throughout the hospital. Blood culture contamination rates were monitored. Cultures were performed using samples obtained from intravascular catheter connector valves.

Results.The relative risk of bloodstream infection for the time period in which the suspect connector valve was in use, compared with baseline, was 2.79 (95% confidence interval, 2.27–3.43). In critical care units, the rate of primary bloodstream infection increased with the introduction of the valve from 3.87 infections per 1000 catheter‐days to 10.64 infections per 1000 catheter‐days ( ), and it decreased to 5.59 infections per 1000 catheter‐days ( ) in the 6 months following removal of the device from use. Similarly, in inpatient nursing units, the rate of bloodstream infection increased from 3.47 infections per 1000 catheter‐days to 7.3 infections per 1000 catheter‐days ( ) following introduction of the device, and it decreased to 2.88 infections per 1000 catheter‐days ( ) following removal of the device from use. Similar events occurred in the cooperative care units. The rate of blood culture contamination did not substantially change over the course of the study. Of 37 valves that were subjected to microbiological sample testing, 24.3% yielded microbes, predominantly coagulase‐negative staphylococci.

Conclusion.A significant association between primary bloodstream infection and a needleless connector valve was observed. Evaluation of needleless connector valves should include a thorough assessment of infection risks in prospective randomized trials prior to their introduction to the market.

Received 12 January 2007; accepted 21 February 2007; electronically published 16 April 2007.

Reprints or correspondence: Dr. Mark E. Rupp, 984031 Nebraska Medical Ctr., Omaha, NE 68198‐4031 ().

Cited by

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  • Presented in part: 16th Annual Meeting of the Society for Healthcare Epidemiology of America, Chicago, Illinois, March 2006 (abstract 227).

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