Catheter-Related Infections

The grounding supports catheter use itself as the proximate cause, with infection occurring after organisms gain access via the catheter. Factors that influence infection include aseptic technique, the site of catheter placement, the material composition of the catheter, and the virulence of the organism. For venous catheters, skin flora or environmental contaminants can enter underlying tissues during insertion and lead to bloodstream infection.

A key mechanism is microbial adherence to catheter surfaces followed by biofilm formation. Biofilms protect microorganisms and help them persist in the host, contributing to ongoing infection and difficulty in eradication. In venous catheters, insertion can breach the skin barrier and permit organisms to access deeper tissues and the bloodstream.

Risk is increased by factors related to catheter insertion and maintenance, including non-ideal aseptic technique, catheter placement site, and catheter material composition. The virulence of the infecting organism also influences the likelihood of infection. The literature also highlights the hospital setting, including intensive care units and long-term care facilities, where catheter use is common.

Management is described at the level of diagnosis, prevention, and treatment strategies for catheter-associated infection, especially catheter-associated urinary tract infection. The guidance emphasizes prevention and control measures to reduce infection risk, along with diagnostic criteria and management of symptomatic infection or asymptomatic bacteriuria. Treatment is discussed in terms of general management strategies rather than specific drug regimens.