Which anatomical site is associated with the LEAST incidence of central line infection?

Which anatomical site is associated with the LEAST incidence of central line infection?

• A. Internal jugular vein
• B. External jugular vein
• C. Subclavian vein
• D. Femoral vein

Answer: (C)

Infection risk varies with where a central venous catheter is placed. The subclavian route has historically shown the lowest rate of catheter-related bloodstream infection because the skin and tract in that region are less exposed to moisture and environmental contamination, and the catheter path tends to be longer and more protected from external bacteria. By contrast, the groin area (femoral) has higher contamination from moisture and bacteria in the perineal region, and the internal jugular site often shows higher infection rates than subclavian in many studies, though results can vary with technique and care. The trade-off with the subclavian site is a higher risk of pneumothorax and other mechanical complications, so site choice balances infection risk against these risks. Therefore, the site with the least incidence of central line infection is the subclavian vein.

Infection risk varies with where a central venous catheter is placed. The subclavian route has historically shown the lowest rate of catheter-related bloodstream infection because the skin and tract in that region are less exposed to moisture and environmental contamination, and the catheter path tends to be longer and more protected from external bacteria. By contrast, the groin area (femoral) has higher contamination from moisture and bacteria in the perineal region, and the internal jugular site often shows higher infection rates than subclavian in many studies, though results can vary with technique and care. The trade-off with the subclavian site is a higher risk of pneumothorax and other mechanical complications, so site choice balances infection risk against these risks. Therefore, the site with the least incidence of central line infection is the subclavian vein.