DermaPort: A Novel Ported Vascular Access System for Hemodialysis

Area of Science:

• Biomedical Engineering
• Vascular Access Devices
• Infectious Disease Prevention

Background:

• Long-term hemodialysis requires reliable vascular access, posing challenges like infection risk and catheter management.
• Current hemodialysis catheters, often polyester with cuffs, are suboptimal and necessitate improvements for adjustment, replacement, infection reduction, and cost-effectiveness.

Purpose of the Study:

• To describe the design and evaluate the performance of the DermaPort ported vascular access system (PVAS).
• To assess the PVAS for tissue integration, infection resistance, and catheter manageability in vitro and in vivo.

Main Methods:

• In vitro and in vivo testing of the PVAS design.
• Evaluation of tissue integration, infection resistance, and catheter repositioning/exchange capabilities.
• Histological analysis of explanted PVAS samples from a human clinical study.

Main Results:

• The PVAS demonstrated superior tissue integration and infection-resisting slidability within 3 weeks, establishing a sterile barrier.
• No evidence of infection or marsupialization was observed over 13 weeks of implantation.
• Explanted human samples showed tissue ingrowth, including collagen and vascular elements, with a macrophage-giant cell response to the metal mesh.

Conclusions:

• The PVAS provides stable, ported vascular access suitable for hemodialysis and other medical applications.
• The system facilitates catheter adjustment and exchange while mitigating infection risks.
• The single-stage implantation procedure and demonstrated efficacy support the PVAS as an improved vascular access solution.