Clinical review: alternative vascular access techniques for continuous hemofiltration.

Area of Science:

• Nephrology
• Critical Care Medicine
• Pediatric Intensive Care

Background:

• Vascular access for continuous hemofiltration presents challenges in critically ill patients, particularly those with edema or coagulopathy.
• Common issues include venous obstruction, cannulation difficulties, bleeding risks, and circuit clotting from disseminated intravascular coagulation.

Purpose of the Study:

• To describe practical techniques for obtaining and maintaining vascular access for continuous hemofiltration in challenging patient populations.
• To address specific difficulties encountered in infants, children, and adults with organ failure.

Main Methods:

• Description of a two-single-lumen thin-walled vascular sheath technique for infant access.
• Explanation of the 'mini-introducer' technique for infants and small children with edema or poor perfusion.
• Review of alternative access routes, ultrasound guidance, and specific venous return options (umbilical, antecubital veins).

Main Results:

• The described techniques aim to facilitate secure vascular access, overcoming challenges like edema, coagulopathy, and anatomical difficulties.
• Ultrasound guidance is highlighted as a crucial tool for safe and effective cannulation of central veins.
• Alternative access strategies provide options for various age groups and clinical scenarios.

Conclusions:

• Effective vascular access for continuous hemofiltration can be achieved through specialized techniques and careful consideration of patient-specific factors.
• These methods improve the feasibility and safety of hemofiltration in critically ill patients, including infants and children.
• The review provides a comprehensive guide to vascular access options in challenging hemofiltration cases.