In hospitalized hematology–oncology patients, culture of blood drawn through a central catheter or peripheral vein has excellent
negative predictive value. Culture of blood drawn through an indwelling central venous catheter has a low positive predictive
value, apparently less than seen with peripheral venipuncture. Thus, a positive result from a catheter needs clinical interpretation
and may require confirmation. However, use of a catheter to obtain blood for culture may be acceptable for ruling out bloodstream
infections.