Central venous line infections in AIDS

Area of Science:

• Infectious Diseases
• Medical Devices
• HIV/AIDS Research

Background:

• Cytomegalovirus (CMV) retinitis requires long-term central venous access for treatment.
• Port-a-Cath and Hickman lines are commonly used for such maintenance therapy.
• Understanding infection risks associated with different catheter types is crucial for patient safety.

Purpose of the Study:

• To compare the relative infection rates of Port-a-Cath and Hickman lines.
• To identify risk factors for line-associated sepsis in patients receiving CMV retinitis treatment.
• To inform clinical practice regarding central venous catheter selection and management.

Main Methods:

• Retrospective casenote review of 75 central venous line insertions over 18 months.
• Calculation of infection rates per 100 line-days for Port-a-Cath and Hickman lines.
• Analysis of septicaemia incidence in relation to neutrophil counts and ganciclovir use.

Main Results:

• Hickman lines had significantly higher infection rates (0.97/100 line-days) compared to Port-a-Caths (0.39/100 line-days).
• A trend towards increased infection rates was observed with ganciclovir use.
• Septicaemia incidence was significantly higher within 1 month of line insertion for patients with neutrophil counts < 1.0 x 10(3)/mm3.

Conclusions:

• Port-a-Cath use is associated with significantly lower rates of line-associated sepsis than Hickman lines in HIV-seropositive patients.
• Insertion of long-term central venous catheters should be avoided in patients with neutrophil counts < 1.0 x 10(3)/mm3.
• These findings support the use of Port-a-Caths over Hickman lines to minimize sepsis risk in this patient population.