Emergency oxygenator change-out after massive fat embolism

Area of Science:

• Cardiovascular Medicine
• Critical Care Medicine
• Biomedical Engineering

Background:

• Extracorporeal membrane oxygenation (ECMO) is a life-support technology used for patients with severe cardiorespiratory failure.
• Oxygenator performance is critical for effective gas exchange during ECMO.
• Transmembrane pressure (TMP) is a key indicator of oxygenator function and potential obstruction.

Observation:

• An unusually high transmembrane pressure gradient was observed immediately upon initiating ECMO.
• This rapid pressure increase necessitated an emergency exchange of the oxygenator circuit.
• The explanted oxygenator contained a significant lipid formation within its structure.

Findings:

• A large lipid deposit was identified as the cause of the high transmembrane pressure.
• The timing of the lipid dislodgement suggests it may have occurred during the cannulation process.
• This finding highlights a potential, previously unreported complication of ECMO initiation.

Implications:

• Clinicians should be aware of potential lipid emboli as a cause of rapid oxygenator failure during ECMO.
• Further investigation into the sources and mechanisms of lipid formation and dislodgement in ECMO circuits is warranted.
• This case underscores the importance of vigilant monitoring of transmembrane pressure during ECMO initiation and prompt intervention when abnormalities arise.