Hemofilter Obstruction with Intravenous Lipid Administration

Area of Science:

• Critical Care Medicine
• Nephrology
• Nutritional Support

Background:

• Continuous venovenous hemofiltration (CVVH) is a vital renal replacement therapy for critically ill patients.
• Parenteral nutrition (PN) is often administered via intravascular devices in these patients.
• Commonly used intravascular devices may be shared for both CVVH and PN delivery.

Observation:

• A patient on CVVH received parenteral nutrition (PN) including injectable lipid emulsion via the same central venous catheter.
• The lipid emulsion in the PN adversely affected the hemofilter's function during CVVH.
• Hemofilter dysfunction manifested as impaired performance.

Findings:

• Lipid-containing parenteral nutrition administered through the same intravascular device as CVVH can compromise hemofilter efficacy.
• Lipid emulsion may cause fouling or obstruction within the hemofilter circuit.
• Management strategies included transitioning to lipid-free PN and utilizing a separate central venous access device for PN.

Implications:

• Clinicians should be aware of the potential for lipid emulsions in PN to interfere with CVVH circuits.
• Careful consideration of intravascular device access is crucial when co-administering CVVH and PN.
• Separate access for PN may be necessary to maintain optimal hemofilter function and patient safety in critical care settings.