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Risk Factors for Infusion-related Phlebitis with Small Peripheral Venous Catheters: A Randomized Controlled Trial

Dennis G. Maki, MD; and Marilyn Ringer, BSN, MS
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Presented in part at the National Meeting of the American Federation for Clinical Research on 29 April 1988, in Washington, D.C. (67).

Grant Support: By Research and Development, Deseret Medical Inc., Sandy, Utah.

Requests for Reprints: Dennis G. Maki, MD, Department of Medicine, H4/574, University of Wisconsin Hospital and Clinics, Madison, WI 53792.

Current Author Addresses: Dr. Maki: Department of Medicine, H4/574, University of Wisconsin Hospital and Clinics, Madison, WI 53792. Ms. Ringer: Saginaw General Hospital, 1447 North Harrison, Saginaw, MI 48640.

© 1991 American College of PhysiciansAmerican College of Physicians

Ann Intern Med. 1991;114(10):845-854. doi:10.7326/0003-4819-114-10-845
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Objective: To identify risk factors for infusion-related phlebitis with peripheral intravenous catheters.

Design: A randomized trial of two catheter materials, with consideration of 21 potential risk factors.

Setting: A university hospital.

Patients: Hospitalized adults without granulocytopenia who received a peripheral intravenous catheter.

Interventions: House officers or ward nurses inserted the catheters, and each insertion was randomized to a catheter made of tetrafluoroethylene-hexafluoropropylene (FEP-Teflon) or a novel polyetherurethane without teachable additives (PEU-Vialon).

Measurements: Research nurses scored insertion sites each day for inflammation and cultured catheters at removal.

Results: The Kaplan-Meier risk for phlebitis exceeded 50% by day 4 after catheterization. Intravenous antibiotics (relative risk, 2.00), female sex (relative risk, 1.88), prolonged (> 48 hours) catheterization (relative risk, 1.79), and catheter material (PEU-Vialon: FEP-Teflon) (relative risk, 0. 73) strongly predicted phlebitis in a Cox proportional hazards model (each, P < 0.003). The best-fit model for severe phlebitis identified the same predictors plus catheter-related infection (relative risk, 6.19), phlebitis with a previous catheter (relative risk, 1.54), and anatomic site (hand:forearm, relative risk, 0.71; wrist:forearm, relative risk, 0.60). The low incidence of local catheter-related infection was comparable with the two catheter materials (5.4% [95% CI, 3.8% to 7.6%] and 6.9% [CI, 4.9% to 9.6%]); none of the 1054 catheters prospectively studied caused bacteremia.

Conclusions: Multiple factors, including the Infusate and the duration of cannulation, contribute to the development of infusion-related phlebitis. The use of peripheral intravenous catheters made of PEU-Vialon appears to pose the same risk for catheter-related infection as the use of catheters made of FEP-Teflon, and PEU-Vialon can permit longer cannulation with less risk for phlebitis.

The risk for catheter-related bacteremia with FEP-Teflon and PEU-Vialon catheters is sufficiently low that it no longer seems justifiable to recommend the use of small steel needles for most peripheral intravenous therapy. Annals of Internal Medicine. 1991;114:845-854.





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