Showing posts sorted by relevance for query deceased donor chains. Sort by date Show all posts
Showing posts sorted by relevance for query deceased donor chains. Sort by date Show all posts

Tuesday, June 14, 2016

White House Organ Summit--video and links. Deceased donor chains planned at Walter Reed

Here's a video of the plenary talks/announcements at the White House Organ Summit yesterday. I give the last brief talk, from minute 43-48. (5 minute talks are hard:). I report on the plan to start some nondirected donor kidney exchange chains with deceased donor kidneys at Walter Reed, which has some flexibility in the allocation of deceased donor kidneys.



Here's the accompanying White House FACT SHEET: Obama Administration Announces Key Actions to Reduce the Organ Waiting List

Here's the text of my five-minute speech (which I wrote out in advance, to stay on script and keep on time):

"White House Organ Summit: Deceased Donor Chains

I’m Al Roth, an economist at Stanford.

Most people waiting for transplants are waiting for kidneys. And kidneys are special, because healthy people have two and can remain healthy with one. So kidneys can be donated by living as well as deceased donors.  Each year in the U.S. we transplant over 5,000 living donor kidneys, along with over 11,000 deceased donor kidneys.

Kidney transplantation is also special: it is both the best treatment for kidney failure, giving recipients many more years of life—and it is also the cheapest treatment. The American health care system saves over $250,000 in five years after a transplant, because dialysis is much more expensive than transplantation and post-transplant care.

          I’m going to tell you now about how some living donor kidney transplants are organized, as background for one of the quite concrete announcements we have today.

Sometimes a person is healthy enough to donate a kidney but can’t give to the patient he loves, because kidneys have to be biologically compatible. This opens up the possibility of kidney exchange (and exchange is where economists come in). Kidney exchange is a kind of matching market in which patient-donor pairs can donate compatible kidneys to one another so that each patient gets a compatible kidney. For example, if you and I are healthy enough to donate a kidney, but can’t donate to the patient we love, maybe my kidney is compatible with your patient and yours with mine, and so a simple exchange between two patient-donor pairs can make two additional transplants possible. In the last 10-15 years, kidney exchange has become a standard part of American medicine, resulting in thousands of additional transplants.

          Sometimes a non-directed donor comes forward—an altruistic donor who wishes to donate a kidney, and doesn’t have a particular patient in mind. These donors can spark chains of transplants that help patient-donor pairs in the kidney exchange pool, and patients on the deceased donor waiting list who don’t have a living donor. Some of these chains can produce many transplants, ever since we have learned to organize them as Non-simultaneous chains, in which the non-directed donor initiates a chain by giving to a patient-donor pair whose donor then gives to another pair, etc., most often ending with a donation to someone on the waiting list who doesn’t have a living donor.  These chains can be long because they don’t have to be conducted simultaneously since every pair receives a kidney before giving one, so that they don’t risk giving a kidney and not getting one.  Mike Rees who is here today organized the first non-simultaneous chain, which had twenty people--ten donors and ten transplant recipients--in the picture that was eventually published in People Magazine.

The average non-directed chain produces five transplants. That is, if someone offers to donate a kidney to start a chain - someone offering to help a stranger with this amazing gift of a kidney and a life free from dialysis - then on average, that one donor's gift will start a chain which produces 5 transplants

With that in mind, earlier this year, several eminent surgeons and I published an article in the American Journal of Transplantation noting that deceased donor kidneys are almost all non-directed. So we proposed that we should occasionally start non-directed donor chains with deceased donor kidneys – which are non-directed donor kidneys that today are used to produce just a single transplant. Carefully done, this could substantially increase the number of transplants for all patients –both those waiting without a living donor and those waiting for a kidney exchange.

Today, surgeons at Walter Reed who are here today have announced that they are going to pilot this idea through the military share program, which gives them the flexibility to allocate certain deceased donor kidneys to the benefit of veterans and service members. This new initiative at Walter Reed may soon show us how to move forward on a larger scale in using some deceased donor organs to start chains of multiple transplants.

To summarize, kidney chains can play an important role in increasing transplants. Since the first long non-simultaneous non-directed donor chain was organized by Dr Rees in 2007, thousands of kidney exchange transplants have been accomplished, more than half through non-directed donor chains. These save both lives and money by increasing the number of transplants. So we should take good care of our non-directed living donors—and there is growing consensus that we should at least figure out ways to reimburse all donors for their financial costs, including lost wages. And we should, in gratitude to our deceased donors, make the best use possible of their non-directed donation.


I’d like to personally thank Walter Reed for their initiative in pioneering the use of deceased donor kidneys to start kidney exchange chains that will increase donations and benefit both those waiting for deceased donors and those waiting for exchange with other patient donor pairs. Starting kidney transplant chains with deceased donor kidneys has the potential to be a very significant innovation."
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Here's a link to my post on our AJT article (by Melcher, Roberts, Leichtman, Roth, and Rees) advocating for starting kidney exchange chains with deceased donor kidneys:

Monday, April 11, 2016


Using deceased donor kidneys to start living donor kidney exchange chains


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Here's the announcement from the DoD:
"BETHESDA, Md., June 13, 2016 — Walter Reed National Military Medical Center officials today announced a pilot program to pioneer kidney paired donation chains started via the military share program, in which families of active duty military service members donate one of their kidneys to patients listed for transplant at the medical center’s campus here.
...
""We are excited to participate in this initiative, which has the potential to increase organ allocation for our patients,” Navy Capt. (Dr.) Eric Elster, professor and chairman of surgery at the Uniformed Services University of Health Sciences and Walter Reed National Military Medical Center said. “While it will require overcoming logistical barriers, we in military medicine excel at such challenges."

Walter Reed surgeons perform an average of 25 transplants per year on patients from across the country, and the medical center also maintains a living donor kidney transplant program that participates in national paired kidney exchanges.

Army Maj. (Dr.) Jason Hawksworth, transplant chief at Walter Reed, said his team “looks forward to contributing to the innovative initiative that may exponentially increase the availability of life-saving transplants on patients throughout the nation."

According to the Scientific Registry of Transplant Recipients, a regulatory body that tracks transplants, Walter Reed has the best organ transplant outcomes in the greater Washington-Baltimore region."


Monday, November 22, 2021

A naturally occurring deceased-donor-initiated kidney exchange chain, by Maghen and Veale

 Here's an interesting case report, from the innovative UCLA transplant center, about a kidney exchange chain actually, if not officially, initiated by a deceased donor.

With “reverse engineering” were some living donor kidney chains in actuality triggered by deceased donors?  by Ariella Maghen and Jeffrey Veale, Clinical Transplantation, First published: 21 September 2021 https://doi.org/10.1111/ctr.14491

"Mr. M is a 58-year-old polycystic kidney disease patient waiting for a kidney transplant in the United States (US). Although his wife Mrs. M offered to donate her kidney to him, they were not a compatible match. While waiting to be “exchanged or swapped” with another donor/recipient pair facilitated by the National Kidney Registry (NKR), Mr. M received a rare offer for a “perfectly-matched” (zero-mismatch) deceased donor (DD) kidney. Only 5% of candidates receive a perfectly matched kidney from a DD; Mr. M accepted the offer and underwent transplantation in February 2020. Currently, his allograft is functioning beautifully, and he states never feeling better. 

"One may think Mrs. M feels relief now and that she is “off-the-hook” to donate. But au contraire as she has completed the extensive donor evaluation and remains in the mindset to donate. Mrs. M's gratitude towards the DD family's gift to her husband motivated her to “pay-their-generosity-forward” and now donate her kidney.

"Mrs. M's donation performed on October 21, 2020, brings greater awareness to the concept of a DD triggered kidney chain, a relatively novel phenomenon in the United States.

...

"This case elucidates how transplant chains, believed to be initiated by non-directed living donors, when reverse-engineered may in actuality have been triggered by DDs who were at the pole position. Although this may be one of the first reported cases, it is possible that other transplant centers have been encouraging the allocation of donors in this fashion. There are likely more living donors who may still want to donate their kidney even after their intended recipient received a DD transplant via “zero-mismatch” or “high-PRA” offers."

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Italy seems to be among the first places to formally follow up on the idea of deceased donor chains. See:

Transplant InternationalVolume 33, Issue 10 p. 1177-1184, Kidney exchange strategies: new aspects and applications with a focus on deceased donor-initiated chains, by Lucrezia Furian,Antonio Nicolò,Caterina Di Bella,Massimo Cardillo,Emanuele Cozzi,Paolo Rigotti  First published: 09 August 2020  https://doi.org/10.1111/tri.13712

Summary: Kidney paired donation (KPD) is a valuable way to overcome immunological incompatibility in the context of living donation, and several strategies have been implemented to boost its development. In this article, we reviewed the current state of the art in this field, with a particular focus on advanced KPD strategies, including the most recent idea of initiating living donor (LD) transplantation chains with a deceased donor (DD) kidney, first applied successfully in 2018. Since then, Italy has been running a national programme in which a chain-initiating kidney is selected from a DD pool and allocated to a recipient with an incompatible LD, and the LD’s kidney is transplanted into a patient on the waiting list (WL). At this stage, since the ethical and logistic issues have been managed appropriately, KPD starting with a DD has proved to be a feasible strategy. It enables transplants in recipients of incompatible pairs without the need for desensitizing and also benefits patients on the WL who are allocated chain-ending kidneys from LDs (prioritizing sensitized patients and those on the WL for longer).

...

"Melcher et al. [10] suggested merging DD programmes with KPD programmes in 2016, an idea explored more recently in a concept paper issued by the Organ Procurement and Transplantation Network (OPTN) [11]. 

...

10 M. L. Melcher, J. P. Roberts, A. B. Leichtman, A. E. Roth, M. A. Rees Utilization of deceased donor kidneys to initiate living donor chains. Am J Transplant 2016; 16: 1367.

11Rock Haynes C, Leishman R. Allowing deceased donor-initiated kidney paired donation (KPD) chains. OPTN/UNOS Kidney Transplantation Committee. Concept Paper; July 31–October 2, 2017.

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Earlier:

Tuesday, August 7, 2018

Sunday, August 23, 2020

More on Deceased donors as non‐directed donors in kidney exchange chains

I anticipate that we  will be reading more in the future about kidney exchange chains started by a deceased donor kidney.  In the meantime, here are two recent papers:

From the American Journal of Transplantation:

Deceased donors as non‐directed donors in kidney paired donation

First published: 16 August 2020
 

This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as doi:10.1111/ajt.16268

Abstract

As proof of concept, we simulate a revised kidney allocation system that includes deceased donor (DD) kidneys as chain‐initiating kidneys (DD‐CIK) in a kidney paired donation pool (KPDP), and estimate potential increases in number of transplants. We consider chains of length 2 in which the DD‐CIK gives to a candidate in the KPDP, and that candidate’s incompatible donor donates to the deceased donor (DD) waitlist. In simulations, we vary initial pool size, arrival rates of candidate/donor pairs and (living) non‐directed donors (NDDs), and delay time from entry to the KPDP until a candidate is eligible to receive a DD‐CIK. Using data on candidate/donor pairs and NDDs from the Alliance for Paired Kidney Donation, and the actual DDs from the Scientific Registry of Transplant Recipients (SRTR) data, simulations extend over two years. With an initial pool of 400, respective candidate and NDD arrival rates of two per day and 3 per month, and delay times for access to DD‐CIK of 6 months or less, including DD‐CIKs increases the number of transplants by at least 447 over two years, and greatly reduces waiting times of KPDP candidates. Potential effects on waitlist candidates are discussed as are policy and ethical issues.

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And from Transplant International: 

Kidney exchange strategies: New aspects and applications with a focus on deceased‐donor‐initiated chains

Lucrezia Furian  Antonio Nicolò  Caterina Di Bella  Massimo Cardillo  Emanuele Cozzi  Paolo Rigotti

First published: 09 August 2020 https://doi.org/10.1111/tri.13712

This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as doi:10.1111/tri.13712

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Abstract: "Kidney paired donation (KPD) is a valuable way to overcome immunological incompatibility in the context of living donation, and several strategies have been implemented to boost its development. In this article, we reviewed the current state of the art in this field, with a particular focus on advanced KPD strategies, including the most recent idea of initiating living donor (LD) transplantation chains with a deceased‐donor (DD) kidney, first applied successfully in 2018. Since then, Italy has been running a national program in which a chain‐initiating kidney is selected from a DD pool and allocated to a recipient with an incompatible LD, and the LD’s kidney is transplanted into a patient on the waiting list (WL).

"At this stage, since the ethical and logistic issues have been managed appropriately, KPD starting with a DD has proved to be a feasible strategy. It enables transplants in recipients of incompatible pairs without the need for desensitizing and also benefits patients on the WL who are allocated chain‐ending kidneys from LDs (prioritizing sensitized patients and those on the WL for longer)."

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Previous posts:

Monday, October 14, 2019  A kidney exchange chain initiated by a deceased donor, in Italy

Tuesday, September 5, 2017 UNOS proposal: Allowing Deceased Donor-Initiated Kidney Paired Donation (KPD) Chains

Monday, April 11, 2016 Using deceased donor kidneys to start living donor kidney exchange chains

 

  1. M. L. Melcher1
  2.  
  3. J. P. Roberts2,*
  4.  
  5. A. B. Leichtman3
  6.  
  7. A. E. Roth4 and
  8.  
  9. M. A. Rees


 

Thursday, February 11, 2016

Using deceased donor kidneys to start some kidney exchange chains

It would save some lives... here's a link to the abstract of a forthcoming paper (more like an editorial, really).

 Abstract

Abstract

We propose that some deceased donor kidneys be allocated to initiate non-simultaneous extended altruistic donor chains of living donor kidney transplants to address in part the huge disparity between patients on the deceased donor kidney waitlist and available donors. The use of deceased donor kidneys for this purpose would benefit waitlisted candidates in that most patients enrolled in kidney paired donation systems are also waitlisted for a deceased donor kidney transplant and receiving a kidney through the mechanism of kidney paired donation will decrease pressure on the deceased donor pool. In addition, a living donor kidney usually provides survival potential equal or superior to that of deceased donor kidneys. If kidney paired donation chains that are initiated by a deceased donor can end in a donation of a living donor kidney to a candidate on the deceased donor waitlist, the quality of the kidney allocated to waitlisted patient is likely to be improved. We hypothesize that a pilot program would show a positive impact on patients of all ethnicities and blood types.

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I've recently updated my game theory, experimental economics and market design page, and you can find some updated papers on kidney exchange at http://web.stanford.edu/~alroth/alroth.html#KidneyExchange , and on deceased organ donation at http://web.stanford.edu/~alroth/alroth.html#Otherorgan 

Sunday, April 3, 2022

Kidney Paired Donation Chains Initiated by Deceased Donors

 Starting kidney exchange chains with a deceased donor is a good idea whose time is coming.  

Wen Wang, Alan B. Leichtman, Michael A. Rees, Peter X.-K. Song, Valarie B. Ashby, Tempie Shearon, John D. Kalbfleisch,  Kidney Paired Donation Chains Initiated by Deceased Donors, Kidney International Reports, 2022, https://doi.org/10.1016/j.ekir.2022.03.023.

(https://www.sciencedirect.com/science/article/pii/S2468024922012438)

"Abstract:

• Introduction: Rather than generating one transplant by directly donating to a candidate on the waitlist, deceased donors (DD) could achieve additional transplants by donating to a candidate in a kidney paired donation (KPD) pool, thereby, initiating a chain that ends with a living donor (LD) donating to a candidate on the waitlist. We model outcomes arising from various strategies that allow DDs to initiate KPD chains. 

• Methods: We base simulations on actual 2016-2017 US DD and waitlist data and use simulated KPD pools to model DD initiated KPD chains. We also consider methods to assess and overcome the primary criticism of this approach, namely the potential to disadvantage Blood Type O waitlisted candidates. 

• Results: Compared to shorter DD initiated KPD chains, longer chains increase the number of KPD transplants by up to 5% and reduce the number of DDs allocated to the KPD pool by 25%. These strategies increase the overall number of Blood Type O transplants and make LDs available to candidates on the waitlist. Restricting allocation of Blood Type O DDs to require ending KPD chains with LD Blood Type O donations to the waitlist markedly reduces the number of KPD transplants achieved. 

• Conclusion: Allocating fewer than 3% of DD to initiate KPD chains could increase the number of kidney transplants by up to 290 annually. Such use of DDs allows additional transplantation of highly sensitized and Blood Type O KPD candidates. Collectively, patients of each blood type, including Blood Type O, would benefit from the proposed strategies."

Monday, April 11, 2016

Using deceased donor kidneys to start living donor kidney exchange chains

In American kidney exchange, living non-directed kidney donors initiate chains that produce an average of five transplants.Deceased donor kidneys are also non-directed, but produce one transplant each.  Here's the abstract for a forthcoming paper in the American Journal of Transplantation (AJT), suggesting that it would be helpful to use some deceased donor kidneys to initiate nondirected donor chains:

Abstract: We propose that some deceased donor (DD) kidneys be allocated to initiate nonsimultaneous extended altruistic donor chains of living donor (LD) kidney transplants to address, in part, the huge disparity between patients on the DD kidney waitlist and available donors. The use of DD kidneys for this purpose would benefit waitlisted candidates in that most patients enrolled in kidney paired donation (KPD) systems are also waitlisted for a DD kidney transplant, and receiving a kidney through the mechanism of KPD will decrease pressure on the DD pool. In addition, a LD kidney usually provides survival potential equal or superior to that of DD kidneys. If KPD chains that are initiated by a DD can end in a donation of an LD kidney to a candidate on the DD waitlist, the quality of the kidney allocated to a waitlisted patient is likely to be improved. We hypothesize that a pilot program would show a positive impact on patients of all ethnicities and blood types.

Here's the link to the journal page

  1. M. L. Melcher1
  2. J. P. Roberts2,*
  3. A. B. Leichtman3
  4. A. E. Roth4 and
  5. M. A. Rees5,6
Article first published online: 9 MAR 2016
DOI: 10.1111/ajt.13740

Saturday, July 9, 2022

Prospects for improving kidney exchange in France

A recent article in NĂ©phrologie & ThĂ©rapeutique simulates how kidney exchange in France could possibly be made substantially more effective, following liberalizations in the law. (The article is in French, but also has an English abstract.) A promising feature is that the article is a collaboration between physicians and market design economists.

Perspectives pour une évolution du programme de don croisé de reins en France

Perspectives for future development of the kidney paired donation programme in France by Julien Combe, Victor Hiller, Olivier Tercieux,  BenoĂ®t Audry, Jules Baudet, GĂ©raldine   Malaquin, François Kerbaul, Corinne Antoine, Marie-Alice Macher, Christian Jacquelinet, Olivier Bastien, and Myriam Pastural

Abstract: "Almost one third of kidney donation candidates are incompatible (HLA and/or ABO) with their directed recipient. Kidney paired donation allows potential donors to be exchanged and gives access to a compatible kidney transplant. The Bioethics Law of 2011 authorised kidney paired donation in France with reciprocity between 2 incompatible “donor-recipient” pairs. A limited number of transplants have been performed due to a too restricted authorization compared to other European practices. This study presents the perspectives of the new Bioethics Law, enacted in 2021, which increases the authorised practices for kidney paired donation in France. The two simulated evolutions are the increase of the number of pairs involved in a kidney paired donation to 6 (against 2 currently) and the use of a deceased donor as a substitution to one of living donor. Different scenarios are simulated using data from the Agence de la Biomedecine; incompatible pairs registered in the kidney paired donation programme in France between December 2013 and February 2018 (78 incompatible pairs), incompatible transplants performed during the same period (476 incompatible pairs) and characteristics of deceased donors as well as proposals made over this period. Increasing the number of pairs has a limited effect on the number of transplants, which increases from 18 (23% of recipients) in the current system to 25 (32% of recipients) when 6 pairs can be involved. The use of a deceased donor significantly increases the number of transplants to 41 (52% of recipients). This study makes it possible to evaluate the increase in possibilities of kidney transplants by kidney paired donation following the new bioethics law. A working group and an information campaign for professionals and patients will be necessary for its implementation."

While the paper focuses on the situation in France, it's opening lines could have been written anywhere:

"La France, comme l’ensemble des pays du monde, souffre d’une pĂ©nurie de greffons rĂ©naux de sorte que le nombre de malades en attente d’une greffe de rein ne cesse de croĂ®tre." [France, like all countries in the world, suffers from a shortage of kidney transplants so that the number of patients waiting for a kidney transplant continues to grow."

Here's hoping that the authors will succeed in their plans to use deceased-donor initiated chains to save more lives in France.

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Earlier related posts:

Sunday, April 3, 2022

Monday, November 22, 2021

Tuesday, August 7, 2018