Which practice would NOT reduce central venous catheter infection risk?

Which practice would NOT reduce central venous catheter infection risk?

• A. Using chlorhexidine over povidone-iodine for skin decontamination
• B. Using minocycline/rifampin impregnated catheters over chlorhexidine/silver sulfadiazine impregnated catheters for long-term use
• C. Using the subclavian route for access
• D. Changing the central catheter every 3-4 days over a guidewire

Answer: (D)

Preventing central venous catheter infections focuses on minimizing contamination and limiting line manipulations. Skin antisepsis with chlorhexidine is more effective than povidone-iodine, reducing microbial colonization at the insertion site. For long-term lines, using antiseptic-impregnated catheters (such as minocycline/rifampin or chlorhexidine/silver sulfadiazine) lowers infection risk. Selecting the subclavian site, when appropriate, is associated with fewer infections than a jugular approach. However, routinely replacing the catheter every few days over a guidewire does not reduce infection risk; each new insertion introduces chances for contamination and infection, and guidelines discourage routine replacement. Catheters should be removed only when no longer needed, or if infection or malfunction occurs.

Preventing central venous catheter infections focuses on minimizing contamination and limiting line manipulations. Skin antisepsis with chlorhexidine is more effective than povidone-iodine, reducing microbial colonization at the insertion site. For long-term lines, using antiseptic-impregnated catheters (such as minocycline/rifampin or chlorhexidine/silver sulfadiazine) lowers infection risk. Selecting the subclavian site, when appropriate, is associated with fewer infections than a jugular approach. However, routinely replacing the catheter every few days over a guidewire does not reduce infection risk; each new insertion introduces chances for contamination and infection, and guidelines discourage routine replacement. Catheters should be removed only when no longer needed, or if infection or malfunction occurs.