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Updated: Jun 25, 2026

Ex Situ Normothermic Machine Perfusion of Donor Livers
Published on: May 26, 2015
Does normothermic regional perfusion harm donors after circulatory death?
Jordan Liebman1, Brendan Parent2
1Department of Medicine, New York University Grossman School of Medicine, New York, New York, USA jliebs95@gmail.com.
Normothermic regional perfusion (NRP) can increase organ transplant viability. This study argues NRP is ethically permissible in controlled donation after circulatory death, as it does not harm donors when protocols are followed.
Area of Science:
- Medical Ethics
- Transplantation Medicine
- Organ Donation
Background:
- Controlled donation after circulatory death (cDCD) aims to increase organ availability.
- Normothermic regional perfusion (NRP) is an extracorporeal membrane oxygenation technique used in cDCD.
- Critics argue NRP violates the dead donor rule, framing the debate as a binary choice.
Purpose of the Study:
- To challenge the binary framework of the NRP debate.
- To evaluate the ethical permissibility of NRP based on donor harm.
- To determine if NRP aligns with moral obligations to organ donors.
Main Methods:
- Ethical analysis of NRP in the context of donor moral status.
- Assessment of obligations to organ donors: preventing harm, protecting futures, and satisfying critical interests.
- Evaluation of NRP against these ethical obligations in cDCD.
Main Results:
- NRP, when performed correctly, does not violate the moral obligations owed to organ donors.
- The ethical permissibility of NRP should not be judged against the dead donor rule alone.
- NRP does not cause harm to organ donors in controlled DCD when standardized protocols are adhered to.
Conclusions:
- Resisting the binary framework allows for a nuanced ethical evaluation of NRP.
- NRP is ethically permissible in controlled DCD as it upholds moral obligations to donors.
- Standardized protocols are crucial for ensuring NRP does not harm organ donors.
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