Background & Objectives
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ECMO use has expanded from short-term rescue to prolonged support.
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Lecture focus:
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How long ECMO can be continued safely.
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Boundaries of futility and ethical dilemmas.
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Future role of ECMO as bridge to recovery or transplant.
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Historical Evolution of ECMO Duration
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1960s: First use of cardiopulmonary bypass; survival only for hours.
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1970s: Improved oxygenators extended support to days.
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1980s–1990s: RCTs showed up to 7–14 days feasible.
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2000s: CESAR trial & H1N1 pandemic—routine support extended to 3 weeks.
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Recent era: Case reports of months to >2 years support with recovery.
Key Insights
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Unexpected lung recovery observed after weeks/months, challenging the old assumption of irreversible lung injury after 2 weeks.
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Technology advances (biocompatible materials, miniaturization) enabled longer safe runs.
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Duration alone is not predictive of futility—outcomes can be excellent even after prolonged ECMO.
Clinical Evidence
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Single-center study:
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Compared patients on ECMO ≤21 days vs. >21 days.
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Survival at discharge: 83% (short) vs. 69% (prolonged) – not significantly different.
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1-year outcomes: Almost all survivors were fully independent.
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Conclusion: With expert care, prolonged ECMO is feasible and worthwhile.
Ethical & Emotional Challenges
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When to stop? No universal definition of futility.
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Ethical dilemmas:
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Patients awake, interactive, but fully dependent on ECMO.
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Religious/cultural contexts where withdrawal is not allowed.
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Families divided between hope and acceptance of futility.
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Team burden: Emotional stress, moral distress, and burnout.
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Resource allocation: “Don’t waste resources” vs. “Preserve life at all costs.”
Case Examples
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36-year-old trauma patient: Prolonged support >80 days, recovered after lung isolation and healing.
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16-year-old postpartum patient: >160 days on ECMO, but died awaiting transplant.
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41-year-old with H1N1 ARDS: Dramatic recovery after >100 days following cannula change.
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65-year-old septic shock patient: 76 days support, died from complications.
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52-year-old H1N1 patient: 114 days support, weaned, but later succumbed to neurological injury.
Practical Lessons & Take-Home Messages
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Prolonged ECMO is possible and can result in full recovery.
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Decision-making must be multidisciplinary, involving intensivists, surgeons, nurses, and ethicists.
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Family engagement:
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Clear, repeated discussions about prognosis, complications, and exit strategies.
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Maintain transparency and trust.
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Ethics:
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Respect autonomy, avoid premature withdrawal.
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Involve families in shared decision-making while keeping final responsibility medical.
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Team well-being: Recognize and address emotional stress.
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Clinical practice point:
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“Do not count days on ECMO.”
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Focus on patient trajectory, recovery potential, and overall clinical context.
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