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Infectious complications of indwelling long-term central venous catheters
1Department of Medicine, Kaiser Hospital, Santa Clara, CA.
Insights
Long-term central venous catheters (CVCs) improve patient quality of life but risk infections like bacteremia. Early diagnosis and appropriate treatment, often with antibiotics, are key to managing CVC infections effectively.
Area of Science:
- Infectious Diseases
- Critical Care Medicine
- Medical Devices
Background:
- Long-term central venous catheters (CVCs) are vital for managing various chronic conditions, enabling patients a better quality of life.
- Their widespread use in hospitals, particularly in Intensive Care Units (ICUs), necessitates a thorough understanding of associated complications.
- Infections represent a significant risk, presenting as tunnel infections, exit site infections, catheter-related bacteremia, and septic thrombophlebitis.
Purpose of the Study:
- To review the spectrum of infections associated with long-term CVCs.
- To discuss diagnostic approaches for CVC-related sepsis.
- To outline management strategies for different types of CVC infections.
Main Methods:
- Literature review of CVC infections and management strategies.
- Discussion of diagnostic tools including quantitative blood cultures and the Maki method.
- Analysis of treatment outcomes based on infection type and causative organism.
Main Results:
- Coagulase-negative staphylococci are the most common pathogens, but a diverse range of organisms can cause CVC infections.
- Quantitative blood cultures and the Maki method improve diagnostic accuracy for CVC sepsis.
- Most CVC infections resolve with antibiotics alone, but specific types may require catheter removal or additional therapies.
Conclusions:
- Physicians must be vigilant for various CVC infections and aware of the diverse microbial causes.
- Accurate diagnosis is crucial for effective management, with specific diagnostic methods aiding certainty.
- While antibiotic therapy is often sufficient, tailored approaches including catheter removal, anticoagulation, fibrinolysis, or surgical debridement are sometimes necessary for resolution.
Abstract:
The long-term CVC allows patients with a variety of diseases to lead a more normal and pain-free life. The use of these catheters has become commonplace in most hospitals, and the physician caring for patients in the ICU will be caring for increasing numbers of patients with an indwelling long-term CVC. Infections of these catheters can be manifested in many different ways: tunnel infections, exit site infections, catheter-related bacteremia, and septic thrombophlebitis. The overwhelming majority of these infections are caused by coagulase-negative staphylococci, but physicians should be aware of the wide variety of organisms that can infect the long-term CVC. The diagnosis of long-term CVC sepsis can be difficult, but the use of quantitative blood cultures for catheters left in place and the Maki method for culturing those catheters that are removed will aid physicians in their quest for diagnostic certainty. The great majority of catheter infections will resolve with antibiotic therapy alone without the need for catheter removal, but there are important exceptions to this general rule. Tunnel infections and fungal long-term CVC infections often require catheter removal for their resolution; septic thrombophlebitis and CR-SCVT require the addition of anticoagulation or fibrinolytic therapy to antibiotic regimens for resolution of the infection, and surgical debridement may be warranted if these modalities fail to resolve the infection.