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Surface-treated catheters--a review
1Kidney Disease Program, Department of Medicine, University of Louisville, Louisville, Kentucky 40202, USA. amy.dwyer@louisville.edu
Insights
Surface-treated hemodialysis catheters aim to reduce complications like infection and clotting. However, current evidence is insufficient to justify their higher cost for chronic hemodialysis patients.
Area of Science:
- Nephrology
- Biomaterials Science
- Medical Devices
Background:
- Vascular access is crucial for hemodialysis patients, with catheters being used by nearly 30% despite superior outcomes with fistulas or grafts.
- Catheter-related complications significantly contribute to morbidity, mortality, and healthcare costs in hemodialysis patients.
Purpose of the Study:
- To evaluate the efficacy of surface-treated catheters in reducing complications for hemodialysis patients.
- To assess the clinical data supporting the use of antimicrobial and antithrombotic coatings in chronic hemodialysis.
Main Methods:
- Review of existing literature on surface-treated central venous catheters.
- Analysis of studies reporting on antimicrobial and antithrombotic coating functionalities.
- Examination of data specific to the chronic hemodialysis patient population.
Main Results:
- Antimicrobial coatings show a 30-50% reduction in bacterial colonization and bacteremia in critical care settings.
- Antithrombotic coatings are effective in reducing thrombus formation on various medical devices.
- Limited clinical data exists on the effectiveness of these surface-treated catheters in chronic hemodialysis patients.
Conclusions:
- While surface-treated catheters show promise, their clinical benefit in reducing complications for chronic hemodialysis patients is not yet established.
- The increased cost of surface-treated catheters cannot be justified without robust clinical data demonstrating improved outcomes in this specific population.
Abstract:
Almost 30% of prevalent hemodialysis patients use catheters for vascular access although outcomes are superior with the use of either an arteriovenous fistula or a synthetic graft. Catheter complications are a major cause of morbidity and mortality for hemodialysis patients and increase the burden on the health care system. Surface-treated catheters have been developed to combat the three most common causes of catheter failure: infection, fibrin sheath formation, and thrombus formation. Two types of catheter surface treatments are available: antimicrobial coatings and antithrombotic coatings. Surface treatment of central venous catheters with antimicrobial materials reduces both bacterial colonization and the incidence of catheter-related bacteremia in critical care patients by 30-50%. Antithrombotic coatings reduce platelet adhesion, inhibit the inflammatory response, and reduce thrombus formation on coronary stents, ventricular assist devices, central venous catheters, and vascular grafts. However, few reports on the use of surface-treated catheters in the chronic hemodialysis patient population exist. At the present time, it is difficult to justify the increased cost of surface-treated catheters for chronic hemodialysis in the absence of clinical data demonstrating that they reduce catheter-related complications in this patient population.
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