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EDECMO 103: HIV and ECMO

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Critical Care ECMO with Dr. Jon Marinaro, Dr. Gary Schwartz and Dr. Cedrick Spak –   Episode 103

Key Points: ECMO in HIV/AIDS Patients

1. HIV Is No Longer a Strong Contraindication to ECMO

  • Historically, HIV and severe immunosuppression were considered relative contraindications for ECMO.

  • With modern antiretroviral therapy (ART), outcomes have dramatically improved.

  • Patients with HIV who receive effective ART can recover immune function and achieve near-normal life expectancy.

  • Therefore, HIV alone should not exclude patients from ECMO candidacy.

2. Immune Reconstitution Makes Recovery Possible

  • ART can rapidly suppress viral load and restore immune function.

  • Patients with very low CD4 counts (even normal CD4 counts (>800) over time.

  • This means even severely immunocompromised patients may recover if given time and support.

  • ECMO can act as a bridge to immune recovery.

  • 3. ECMO Functions as a “Pause Button”

    • ECMO stabilizes respiratory or cardiac failure while clinicians:

      • Treat infections

      • Start ART

      • Manage complications

    • This buys time for reversible disease processes to recover.

    4. Major Cause of Respiratory Failure: Pneumocystis Pneumonia

    Common features in HIV patients requiring ECMO:

    • Pneumocystis jirovecii pneumonia (PJP)

    • Severe respiratory failure

    • Cystic lung destruction

    • Frequent bronchopleural fistulas and pneumothorax

    Ventilation can worsen these conditions.

    Thus ECMO is used to:

    • Reduce ventilator pressure

    • Prevent further lung damage

    • Allow lung healing.

    5. Ventilator Strategy: Minimize Positive Pressure

    Typical strategy:

    • Rapid ECMO initiation if ventilation causes lung injury

    • Attempt early extubation

    • If needed:

      • tracheostomy

      • minimal ventilator settings

    Example “rest settings” described:

    • Driving pressure ≈ 10

    • PEEP ≈ 10 (often reduced further)

    • FiO₂ ≈ 50%

    Goal: avoid further lung trauma.

    6. ECMO Candidate Selection

    Primary question:

    Is the disease reversible?

    If yes → ECMO should be considered.

    Factors supporting ECMO:

    • Young patient

    • Treatable infection

    • Potential immune recovery

    Possible relative contraindications:

    • Severe fungal infection

    • Multiple uncontrolled opportunistic infections

    • Extreme cachexia or severe systemic deterioration.

    7. Early ART Should Be Started

    Modern approach:

    • Start antiretroviral therapy during acute illness

    • Do not delay until after ICU discharge

    Benefits:

    • Rapid viral suppression

    • Faster immune recovery

    Risk:

    • Immune Reconstitution Inflammatory Syndrome (IRIS)

      • Temporary worsening of infection due to immune rebound.

    8. Circuit and Infection Complications

    Important ECMO considerations in HIV patients:

    • Increased risk of circuit thrombosis

    • Possible fungemia

    • If fungemia occurs:

      • circuit replacement

      • possible re-cannulation

    These complications require careful monitoring.

    9. Cannulation Strategy

    Example high-volume center approach:

    • Bilateral femoral VV ECMO cannulation

      • Fast

      • Reliable flow

      • Allows later neck access if needed

    Used especially during high-volume periods (e.g., COVID).

    10. Outcomes and Indication Expansion

    ECMO indications are evolving:

    • Older age

    • Longer ventilator times

    • HIV/AIDS

    • Cancer patients

    All are examples of “indication creep” as experience grows.

    The key principle remains:

    ECMO should be used if there is a realistic chance of recovery.

    11. Resource and Program Considerations

    Decision-making must consider:

    • Resource availability

    • Program experience

    • Institutional risk tolerance

    High-volume ECMO centers can often accept higher-risk patients.

    12. Broader Lesson

    Medical contraindications often change with new technology and therapies.

    Example given:

    • HIV was once a contraindication for kidney transplantation

    • Now it is accepted due to improved treatment.

    The same evolution may be happening with ECMO indications.

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