Kidney and pancreas policy development updates
On this page
- Oct. 28, 2019: Kidney and pancreas allocation proposals modified
- Oct. 18, 2019: Committees to review kidney and pancreas proposals
- Sept. 16, 2019: Transplant patient webinar addresses proposed changes to kidney and pancreas distribution
- Aug. 7, 2019: Kidney and pancreas distribution modeling: Analysis at a glance
- Aug. 2, 2019: Public comment open Aug. 2 through Oct. 2
- July 4, 2019: Kidney and pancreas committees refine distribution policy options
- June 24, 2019: National kidney and pancreas webinars discuss SRTR modeling results
- Jan. 22, 2019: Public comment open Jan. 2 through March 22, 2019
- Dec. 10, 2018: SRTR modeling results available for kidney and pancreas distribution proposal
Kidney and pancreas allocation proposals modified
Oct. 28, 2019 — The OPTN Kidney Transplantation and Pancreas Transplantation Committees, following consideration of extensive public comment, will advance updated allocation proposals to the OPTN Board of Directors for consideration at its December 3 meeting. The proposals eliminate donation service area (DSA) and region from policy and replace them with a system that allocates kidneys and pancreata based on distance between the hospital listing the transplant candidate and the donor hospital.
Statistical modeling suggests the proposed changes will reduce variation in the amount of time candidates wait for kidney transplants in various areas of the country. The proposed policies should also increase transplant rates for key groups of candidates including ethnic minorities, children, and those who are difficult to match due to high immune sensitivity.
Under each proposal, after a kidney and/or pancreas is offered for any exceptionally well-matched donor-candidate combination nationwide, the next candidates to receive offers are those listed at hospitals within 250 nautical miles from the donor hospital. Offers not accepted for any of these candidates would then be made for those at hospitals beyond a 250 nautical mile radius.
This represents a change from proposals both committees circulated for public comment in August 2019. The committees studied various alternative circle sizes, including the 250 nautical mile radius, and simulation modeling suggested each option would improve upon current allocation based on key metrics. While the two committees initially recommended circles of 500 nautical miles, a substantial theme in public comment was that the wider proposed circle would pose major logistical challenges for organ acceptance and transportation.
“We appreciate the input of everyone who commented on the proposal,” said Vincent Casingal, M.D., chair of the Kidney Committee. “There was a range of views, but many were concerned about unwanted effects we might see with a 500 nautical mile approach. The 250 nautical mile radius is more consistent with established logistics while also replacing the current local and regional boundaries with a more consistent framework nationwide.”
Also under the proposals, transplant candidates would receive proximity points based on the distance between their transplant program and the donor hospital. Proximity points are intended to improve the efficiency of organ placement by adding priority for candidates closer to the donor hospital. Doing so can minimize organ preservation time and increase the likelihood of organ function.
As proposed, candidates within the initial 250 nautical mile radius would receive a maximum of two proximity points, while those outside the initial circle would receive a maximum of four proximity points. At each level, the points would be highest for those closest to the donor hospital and would decrease as the distance grows between the donor and transplant hospitals.
The proximity points in the revised proposals also decreased from those in the public comment proposals (as many as four for candidates in the initial circle and eight for those outside the circle). “With a smaller distribution circle, logistical challenges become less of a factor,” said Silke Niederhaus, M.D., chair of the Pancreas Committee.
The committees will present their updated proposals for action by the OPTN Board of Directors at its meeting December 3, 2019, in Dallas. Additional clarifying policy components will be circulated for additional public comment early in 2020 and implemented along with the policies as approved by the board. The additional components include classifying medical urgency for kidney candidates and providing for backup offers when a kidney or pancreas cannot be used for the first intended candidate.
Committees to review kidney and pancreas proposals
Oct. 18, 2019 — Thank you to everyone who submitted public comment on the OPTN Kidney Transplantation and Pancreas Transplantation Committees’ proposals to remove Donation Service Area (DSA) and OPTN Regional boundaries from allocation policies. From August 2 to October 2, the OPTN received numerous comments on the two proposals. All comments received are posted on the public comment section of the OPTN website.
The Kidney Committee will meet in-person on Monday, October 21 and the Pancreas Committee on Wednesday, October 23. To prepare for their in-person meetings, both committees met separately via conference call to review public comments and provide committee members with an opportunity to ask questions.
During their respective in-person meetings, the committees will have in-depth discussions to evaluate all public comments and decide next steps for the proposals. We will keep you informed as to whether the committees continue with the proposals as submitted for public comment or make changes based on public comment feedback.
If you have questions about either proposal, please contact the following staff:
Transplant patient webinar addresses proposed changes to kidney and pancreas distribution
Sept. 16, 2019 — Transplant candidates, recipients and their families have a unique perspective on national organ transplant policy. UNOS, in its role as the national Organ Procurement and Transplantation Committee (OPTN), encourages all who are interested to read and offer public comment on proposed policies.
Two proposals recently out for public comment seek to eliminate geographic boundaries currently used in kidney and pancreas allocation. The proposed policies would replace local donation service area (DSA) and regional boundaries with a 500 nautical mile circle around the donor hospital. After the organ is offered to all eligible candidates listed inside the 500 nautical mile circle, it would then be offered to eligible candidates beyond 500 nautical miles.
The OPTN kidney and pancreas transplantation committees hosted a webinar on September 16, 2019, to describe the proposals for transplant patients and family members.
Kidney and pancreas distribution modeling analysis
Aug. 7, 2019 — The goals of removing donation service area (DSA) and region from kidney and pancreas distribution are to create more equity in access to transplantation for candidates regardless of where they live, and to ensure that these allocation policies meet the requirements of the OPTN Final Rule. Under current allocation, research performed by the OPTN highlights the candidates’ place of residence or listing as the largest factor related to disparity in kidney allocation1.
The OPTN kidney and pancreas transplantation committees both have worked to identify alternatives to DSA and region that improve overall equity in geographic distribution. This effort does not affect other important allocation factors, such as keeping the elevated priority for highly sensitized patients. The goal of this project is to revise the role of geography for kidney, pancreas and combined kidney-pancreas transplants. Work related to multi-organ priority is out of scope and will be addressed in a future, cross-organ policy project.
Alongside committee clinical and professional experience, the SRTR Kidney-Pancreas Simulation Allocation Model (KPSAM) is an important tool that OPTN committees use when developing changes to organ allocation policy. The latest SRTR report models proposed replacements of current DSA and region boundaries in kidney and pancreas allocation with single-circle allocation systems of 150, 250, or 500 nautical miles (read about the different modeling input on page 3 of the full report). Any organs not accepted inside the first circle of allocation would be offered at the national level.
Below are some takeaways from the latest modeling:
- Nearly all scenarios yielded similar results in terms of effects on subpopulations.
- Kidney transplant rates remained nearly constant under broader distribution:
- Rates among pediatric, female, African American, and Latino candidates increased.
- Rates among highly sensitized (80-99% cPRA) and high dialysis time (> 5 years) candidates increased.
- Slight decreases were noted in transplant rates for non-metropolitan candidates and no change in percentage of kidney alone transplants. Modeling indicates that candidates in rural areas would have similar rates of transplant compared to candidates in cities.
- The larger the circle is, the farther distance organs would travel. This may lead to increased cost and logistic issues for which there is only anecdotal evidence to examine.
- Kidney-pancreas transplant rates increased across all broader distribution scenarios modeled:
- In general, the kidney-pancreas transplant rate increased as the circle size increased.
- Percentages of transplants among African American, and females increased.
- Rates among highly sensitized (80-98% cPRA) candidates increased.
- As the pancreas circle size increases, KP transplant counts increased, leading to subsequent decreases in kidney and pancreas alone transplants. This is due to the absolute priority KP candidates are given over kidney and pancreas alone candidates at the current local level.
- Although the model predicts that pancreas alone transplant rates decrease across each scenario, the Committee notes that the model does not reflect individual program behavior.
- While there was a projected decrease in kidney alone and pancreas alone transplants, when examining the total number of kidney transplants (kidney alone and KP), the total number of transplants varied little across model variations, and almost no change was seen from baseline.
- As expected, the decrease in kidney alone, and simultaneous increase in kidney-pancreas, saw the largest change in the biggest circles (e.g. 500 NM) and change was minimized in the smaller circles (e.g. 150 NM).
- Proximity points are considered being added to current candidate characteristics that currently receive points, such as candidate CPRA or ABDR-mismatching in kidney allocation, to weight proximity to the donor in matching potential transplant recipients to deceased donor organs. Higher values of proximity points would indicate that a larger weight, or value, is placed on geography; candidates closer to the donor in proximity would receive more proximity points than candidates further away. It’s also important to note that candidates cannot move from outside the circle to inside the circle, regardless of how many proximity points are assigned. The function of proximity points is addressed in a prior concept paper.
- KPSAM results showed that proximity points were successful in reducing travel of the organ inside the circle, but were less impactful in national allocation. However, a relatively small number of organs (10-20 percent) are predicted to occur nationally, which may be an under prediction. Given the limitations of the KPSAM, there is likely a larger number of transplants occurring from acceptances further down the match than sequence #200 that aren’t accounted for in the results due to computational and other modeling limitations.
It is important to note that modeling cannot account for changes in organ acceptance behavior or identify trends over time, and that the output would not reflect instances of transplants for organs accepted past 200 in the sequence of offers.
If you have any questions about the next steps for changing these policies or about the modeling, please contact Scott Castro (email@example.com) or Amber Wilk (firstname.lastname@example.org) for kidney questions and Abby Fox (email@example.com) or Read Urban (firstname.lastname@example.org) for pancreas questions.
cPRA = calculated panel reactive antibodies
EPTS = estimated post-transplant survival
KPSAM = Kidney-Pancreas Simulation Allocation Model
NM = nautical miles
OPTN = Organ Procurement and Transplantation Network
SRTR = Scientific Registry of Transplant Recipients
1Stewart DE, Wilk AR, Toll AE, et al. Measuring and monitoring equity in access to deceased donor kidney transplantation. Am J Transplant. 2018;00:1–12. https://doi.org/10.1111/ajt.14922.
Public comment open Aug. 2 through Oct. 2
Aug. 2, 2019 — The Organ Procurement and Transplantation Network (OPTN) is offering eight proposals for public comment, Aug. 2 through Oct. 2.
- Eliminate the use of DSA and region in kidney allocation policy
- Eliminate the use of DSA and region in pancreas allocation policy
- Expedited liver placement
- Modify data submission policies
- Clarification of pre-existing liver disease
- Data collection to evaluate the logistical impact of broader distribution
- Modify appointment process for histocompatibility committee vice-chair
- Continuous distribution of lungs concept paper
View information, comments and replies on https://optn.transplant.hrsa.gov/governance/public-comment/, to promote transparency and trust in the national transplant system. Visitors can also share comments on social media, if they wish.
We encourage patients, transplant candidates and recipients, living donors, donor families and transplant professionals to learn more about the proposals and provide valuable feedback to help shape U.S. organ transplant policy. At-a-glance summaries explain the proposed changes and why they may matter to you.
The purpose of these webinars is to give everyone an opportunity to learn about the proposals.
After public comment closes, we review all comments we receive about a proposed change before the OPTN Board of Directors votes on it.
Kidney and pancreas committees refine distribution policy options
July 4, 2019 — The OPTN kidney transplantation and pancreas transplantation committees met June 25 in Baltimore to continue developing proposals to increase equity in access by replacing donation service area (DSA) and regional boundaries in kidney and pancreas distribution.
“Both our committees reviewed the recent SRTR modeling of policy options,” said Silke Niederhaus, M.D., vice chair of the pancreas transplantation committee. “We saw that many of the options had very similar impacts on key outcomes, so we were able to narrow the options we will pursue further.”
Both committees resolved not to continue active study of the options utilizing circles of 150 nautical miles from the donor locations, since their modeled outcomes did not reveal significant enough benefits to restrict distribution to that radius.
Each committee and a joint workgroup will continue to refine and discuss options based on circles of either a 250 or 500 nautical mile radius. They will review refined analysis comparing the alternative approaches to one another and to the baseline simulation of current allocation policy.
“We will continue to discuss options that best address needed improvements to equity and patient access,” said Nicole Turgeon, M.D., chair of the kidney transplantation committee. “We have an opportunity not simply to replace our use of DSAs and regions but to make things better for all our patients.”
The committees and workgroup will also carefully weigh community and public input, including comments and questions from webinars held June 27 and 28.
National kidney and pancreas webinars discuss SRTR modeling results
June 24, 2019 — The OPTN kidney transplantation and pancreas transplantation committees are developing organ distribution proposals to replace current Donation Service Area (DSA) and regional boundaries used in the current system. SRTR modeling of alternatives to inform these policy proposals is available.
- Cover letter of analysis report
- Analysis report, Appendix 1
- Analysis report
- Analysis report, K12018_01: Rerun using Donor-only acceptance model
- Data request
The committees sponsored national webinars in June to further discuss SRTR modeling, outline the plans for further policy development, and seek public feedback prior to the committees submitting proposals for public comment. View webinar recordings to learn more.
The committees will discuss the modeling results and webinar input and publish proposals for public comment period beginning August 2.
Public comment open Jan. 2 through March 22, 2019
Jan. 22, 2019 — The Organ Procurement and Transplantation Network (OPTN) is offering nine proposals for public comment beginning on Tuesday, January 22.
Comments and replies will be published on https://optn.transplant.hrsa.gov/governance/public-comment/, to promote transparency and trust in the national transplant system. Visitors can also share comments on social media, if they wish.
We encourage patients, transplant candidates and recipients, living donors, donor families and transplant professionals to learn more about the proposals and provide valuable feedback to help shape U.S. organ transplant policy.
These are the proposals available for public comment:
- Clarifications on Reporting Maintenance Dialysis
- Eliminate the Use of DSA and Region from Kidney and Pancreas Allocation
- Eliminate the Use of DSAs in Thoracic Distribution
- Eliminate the Use of Regions in VCA Distribution
- Ethical Implications of Multi-Organ Transplants
- Expedited Placement of Livers
- Guidance on Effective Practices in Broader Distribution
- Modify HOPE Act Variance to Include Other Organs
- Split Liver Variance
The purpose of these webinars is to give everyone an opportunity to learn about the proposals on the discussion agenda.
Public comment closes on March 22. We review all comments we receive about a proposed change before the OPTN Board of Directors votes on it.
SRTR modeling results available for kidney and pancreas distribution proposal
Dec. 10, 2018 — The OPTN/UNOS kidney transplantation and pancreas transplantation committees are developing proposed kidney and pancreas distribution policies to replace current Donation Service Area (DSA) and regional boundaries used in the current system. SRTR modeling of alternatives to inform the proposal is available via the following links:
The committees will discuss the modeling results and develop a proposal for public comment beginning January 22 and ending March 22, 2019. Look for additional updates on the geographic organ distribution page of the OPTN website.
Who makes policy?
Learn how we develop policy together
The role of public comment
OPTN regions and regional meetings
Join the process: how to get involved
What are the kidney and pancreas proposals under consideration?
Proposal to eliminate the use of DSA and Region in kidney allocation
Proposal to eliminate the use of DSA and Region in pancreas allocation
SRTR modeling results: kidney and pancreas distribution analysis
Allocation proposal maps: view donor hospitals within 250 NM of kidney transplant centers
What happened in public comment?
More kidney and pancreas resources:
OPTN Kidney Transplantation Committee webpage and meeting minutes
OPTN Pancreas Transplantation Committee webpage and meeting minutes
KAS: the Kidney Allocation System
View a webinar with information for transplant patients and families
Additional kidney and pancreas information
Previous committee steps
Read the January 2019 joint concept paper “Eliminate the Use of DSAs and Regions in Kidney and Pancreas distribution”
Read the June 2019 Kidney/Pancreas Workgroup OPTN Board Report
“The appropriateness of the concentric circle model for kidney allocation is mostly supported, but there are differences in opinion. What is not being discussed are the differences in criteria of acceptances of organs between centers and how that affects a center’s time to organ offer for their candidates. Along with changes in allocation will likely come changes in practice of organ acceptance, and this will need to be tracked, so centers can learn more about how organs they did not accept fared.”
Michael Schilsky, M.D., Director of Hepatology, Yale NHH
Region 1 meeting comment on the proposal to eliminate DSA and Region from kidney allocation policy
“…I support the proposal as an interim path toward Continuous Distribution, though please note that I prefer 250nm circles. While I understand the concerns of many of the commenters with respect to other changes that could be made instead, the fact of the matter is that, while there are many changes that can be done (increasing OPO performance, discussing opt-in vs. opt-out, etc.), those other changes should be considered separately. That is, this proposal is not mutually exclusive to other such changes, and this change is important to both fulfill the requirements of NOTA/Final Rule, and to ensuring that we are taking every individual step we can to improve the system…”
OPTN public comment on the proposal to eliminate the use of DSA and Region in pancreas allocation policy