#155 - Chris Sonnenday, M.D.: The history, challenges, and gift of organ transplantation
Guest Chris Sonnenday, Transplant Director for Michigan Medicine, discusses the history and future of organ transplantation, focusing on kidney and liver. He shares insights on leadership, maintaining humanity in medicine, and the profound impact of organ donation.
Deep Dive Analysis
18 Topic Outline
Introduction to Chris Sonnenday and Transplant Medicine
Chris's Journey to Medicine and Surgery
Maintaining Empathy and Leadership During Residency
The Culture and Lessons of Morbidity and Mortality (M&M) Conference
Why Transplant Surgery: Innovation and Team Collaboration
Historical and Technical Challenges of Kidney Transplantation
Overcoming Immunologic Barriers in Organ Transplantation
The Transformative Impact of Cyclosporine
Current and Future Demand for Kidney Transplants: Chronic Disease and Prevention
The Superiority and Expansion of Living Kidney Donation
Ethical Considerations: Organ Market and Donor Support
Evolution of Organ Allocation Systems
Defining Brain Death and Donation After Cardiac Death
The Profound Impact and Gift of Organ Donation
The Surgical Complexity of Liver Transplantation
The Unmet Need for Extracorporeal Liver Support: The Baboon Story
The Shifting Epidemiology of Liver Disease: HCV to NAFLD/AFLD
The Critical Role of the Transplant Team and a Tragic Loss
9 Key Concepts
Morbidity and Mortality (M&M) Conference
A weekly surgical conference reviewing patient cases, especially those with suboptimal outcomes, to identify opportunities for system improvement rather than assigning individual blame. It serves as a cultural event reflecting a department's commitment to accountability and patient care.
Orthotopic vs. Heterotopic Transplant
Orthotopic transplant involves removing the failed organ and replacing it with the new one (e.g., heart, liver), while heterotopic transplant means placing the new organ in an additional location without removing the original (e.g., kidney). Kidney transplants are typically heterotopic, placing the new kidney in the pelvis.
Ischemia-Reperfusion Injury
Damage that occurs when blood supply is restored to tissue after a period of oxygen deprivation (ischemia). In transplantation, this injury to the donor organ during the period it's outside the body can negatively impact graft survival and prime the recipient's immune system for rejection.
Cross Match
A test performed in transplantation by mixing donor cells with recipient serum to determine if the recipient has preformed antibodies that would attack and destroy the donor cells. A positive cross match indicates incompatibility and a high risk of hyperacute rejection.
Hyperacute Rejection
An immediate and severe form of organ rejection that occurs within minutes to hours after transplant, caused by pre-existing antibodies in the recipient's bloodstream attacking the donor organ. The organ quickly thromboses and dies, often before the surgical procedure is complete.
Cellular Rejection
A type of organ rejection that occurs days, weeks, or months after transplant, mediated by the recipient's T cells recognizing foreign antigens on the donor organ. This recognition primes the immune system to form injury, leading to organ damage or failure.
Brain Death
A clinical diagnosis where the brain has sustained an injury leading to the complete and irreversible cessation of all brain function, including the brainstem, while other bodily functions like heart beating may be maintained with mechanical support. It is legally considered death, allowing for organ donation while circulation is preserved.
Portal Hypertension
A condition resulting from chronic liver injury and fibrosis (cirrhosis) where the pressure in the portal venous system increases significantly. This leads to the development of collateral blood vessels (varices) in the GI tract, fluid retention (ascites), and makes liver surgery extremely challenging due to increased bleeding risk.
Non-Alcoholic Fatty Liver Disease (NAFLD/NASH)
A condition characterized by fatty deposition in the liver that can lead to chronic inflammation and fibrosis, eventually progressing to cirrhosis and liver failure. Driven by the obesity epidemic and metabolic syndrome, it is predicted to become the leading indication for liver transplantation.
9 Questions Answered
Doctors can maintain empathy by focusing on the patients, recognizing the privilege of being involved in their care, and remembering that the patients' struggles are often far greater than their own, which helps re-center their perspective.
M&M conferences review patient cases with suboptimal outcomes to foster accountability and identify systemic opportunities for improvement, rather than assigning individual blame, thereby shaping the department's culture towards better patient outcomes.
Living donor kidneys generally have significantly better long-term graft survival due to shorter ischemic times, less ischemia-reperfusion injury, and a reduced propensity for rejection compared to deceased donor kidneys, which undergo more trauma and longer preservation.
The principle is that organ donation is a gift, and allowing an open market could be coercive, exploiting economically disadvantaged individuals and undermining public trust in the donation system, as seen in some countries.
Organ allocation has moved away from artificial local or regional boundaries to a distance-based system (concentric circles from the donor hospital), aiming to reduce geographic disparities in access to organs and prioritize the sickest patients more broadly.
Registering oneself as an organ donor and clearly communicating those wishes to family members acts as an advanced directive, easing the burden on loved ones who might otherwise face an impossible decision during a tragic time.
The liver's complex dual blood supply, its anatomical position near major vessels, and the severe physiological derangements (like portal hypertension and clotting deficiencies) in patients with end-stage liver disease make the surgery extremely challenging and prone to bleeding.
The liver's complex synthetic functions, particularly its precise regulation of blood glucose and metabolism, are incredibly difficult to replicate mechanically, making patients with liver failure uniquely dependent on timely transplantation.
The development of highly effective direct antiviral agents has nearly cured Hepatitis C as a major indication, while the rising epidemics of non-alcoholic fatty liver disease (NAFLD/NASH) and alcohol-related liver disease (AFLD) have become the predominant causes of liver failure requiring transplant.
16 Actionable Insights
1. Communicate Organ Donation Wishes
Register yourself as an organ donor and clearly communicate your wishes to your family, making it easier for them during a difficult time by providing an advanced directive.
2. Proactively Monitor Kidney Health
To preserve kidney function for a longer, healthier life, proactively monitor biomarkers like Cystatin C and microalbumin in urine, and address seemingly minor issues like blood pressure (e.g., 130/85) to prevent precipitous decline.
3. Explore Living Organ Donation
If you are in need of a kidney transplant, seriously consider exploring options for living donation due to its significant benefits in graft survival and reduced rejection rates compared to deceased donor organs.
4. Prioritize Preventative Care
Recognize the current shortcomings in preventative care, especially for conditions lacking reliable measures, and actively seek or advocate for better strategies to address health problems early.
5. Re-center on Those Served
When facing difficulties or stress in your work, re-center yourself by focusing on the people you are serving and the privilege of being involved in their lives, recognizing their challenges are often greater.
6. Leverage High Expectations
Recognize and appreciate the high expectations from mentors and colleagues, as these can be a powerful driver to achieve beyond your perceived limits.
7. Focus on Systemic Improvement
In situations with suboptimal outcomes, focus discussions on what could be done better next time to improve the outcome, rather than assigning individual blame.
8. Take Personal Accountability
When presenting or discussing errors or suboptimal outcomes, take personal accountability for the situation, focusing on lessons learned rather than blaming others or external circumstances.
9. Recognize Systemic Improvement Opportunities
Adopt a philosophy that values recognizing opportunities for systemic and team improvement over assigning individual blame, fostering a culture where everyone works towards better outcomes.
10. Cultivate Patient-Focused Culture
Foster a culture that prioritizes what is right for the patient and sets a positive example for trainees, moving away from individual blame to ensure everyone’s efforts are aligned.
11. Seek Collaborative Team Environments
Gravitate towards team-collaborative activities and environments, as being part of a strong team can pull the best out of you and inspire you to give your best.
12. Maximize Every Opportunity
Approach significant life experiences, like training or new roles, with an obligation to maximize the entire experience, recognizing the privilege of the opportunity.
13. Embrace Challenging Service
Seek opportunities to serve people during their scariest or darkest moments, using your skills to help them navigate difficult times and solve problems.
14. Choose Service-Oriented Career
When choosing a career, consider pursuing something that serves other people, as this can be a fulfilling and impactful path.
15. Address Root Causes of Addiction
Recognize that conditions like alcohol-related liver disease, similar to the opiate crisis, are often behavioral diseases, and progress requires addressing the underlying reasons for self-medication and destructive cycles with appropriate attention and resources.
16. Deepen Health Knowledge
If you want to take your knowledge of health and wellness to the next level, consider joining the podcast’s membership program for more in-depth, exclusive content.
8 Key Quotes
I always found, fortunately, that what re-centers me when medicine gets hard, because it does get difficult... what has always re-centered me is the patients.
Chris Sonnenday
You can look into a department's soul by attending their morbidity and mortality conference.
Chris Sonnenday
Thank you for your high expectations. Like, that's really what drove me to achieve things that I didn't necessarily think were within me.
Chris Sonnenday
The battle you're waging within is different than what everybody sees on the outside.
Chris Sonnenday
The experience of organ donation and knowing that their loved one's organs live on in another individual and save their life is the only good thing about what was otherwise the worst day of their lives.
Chris Sonnenday
It's like making Gatorade, they tried, you know, different electrolyte solutions and additives and other nutrients until they figured out which mitigated that ischemic time the best.
Chris Sonnenday
The liver is this incredible organ in that it does have this regenerative capacity. Hepatocytes will replenish over time.
Chris Sonnenday
It is truly a curative situation.
Chris Sonnenday