Pulmonary artery catheter infections. A prospective study

Area of Science:

• Infectious Diseases
• Medical Devices
• Critical Care Medicine

Background:

• Swan-Ganz pulmonary artery catheters are widely used in critical care.
• The precise incidence and risk factors for catheter tip infections remain unclear.

Purpose of the Study:

• To prospectively determine the incidence of catheter tip infection.
• To identify potential risk factors associated with catheter tip infections.
• To evaluate the relationship between catheter tip and blood cultures.

Main Methods:

• Prospective study of 170 Swan-Ganz catheter insertions in 113 patients.
• Semiquantitative culture technique used for catheter tip analysis.
• Comparison of infection rates between patients receiving and not receiving antibiotics.

Main Results:

• A 5.8% incidence of positive catheter tip cultures was observed.
• No significant risk factors for infection were identified, though a trend suggested higher rates in non-antibiotic groups (p<0.06).
• Positive blood cultures were significantly more frequent in patients with positive catheter tips (37.9% vs. 10.6%, p<0.001), but not a reliable indicator of tip infection.

Conclusions:

• Catheter tip infections are relatively infrequent.
• Infections often originate from a distant focus.
• Adherence to a strict catheter management protocol is crucial for minimizing infection rates.