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Lung CAS summary data updated

Lung CAS summary data updated

Below is information for lung transplant program physicians, surgeons, transplant coordinators, program directors and data coordinators on the distribution of scores for all lung candidates registered in the U.S. It is intended as a point-in-time reference to help transplant programs understand how their candidates’ scores compare to the national distribution of components of the lung Composite Allocation Score (lung CAS). Members can also use this information as a guide when submitting CAS exception requests for lung candidates. See the Lung Review Board Operational Guidelines and Clinical Guidance for more information on submitting exception requests. The guidance includes specific recommendations for lung transplant candidates diagnosed with pulmonary hypertension (PH). Such candidates who meet the following criteria may qualify for an increase in their Waitlist Survival and/or Post-Transplant Outcomes Scores:

  1. Patient is deteriorating on optimal therapy, and
  2. Patient has a right atrial pressure greater than 15 mm Hg or a cardiac index less than 1.8 L/min/m2

To request an increase in a PH candidate’s scores, transplant programs must submit an exception request to the Review Board; this request should include sufficient clinical detail to support that the patient meets the above criteria. If the transplant program believes that its patient has similar waiting list mortality and potential transplant benefit as a PH patient meeting the criteria listed above, then it should provide a detailed narrative on that assertion, referencing literature supporting the request for a higher score. Transplant programs may wish to submit to the Review Board exception requests for the candidate’s Waitlist Survival Score and Post-Transplant Outcomes Score to be at the national 90th percentile for each goal (see tables below). The distribution of Medical Urgency points, Post-transplant Outcomes points, Biological Disadvantages points, CAS subscores for all active registrations waiting for lung transplants as of January 28, 2025 are listed below.

Please note: When submitting an exception request for one of the attributes, when prompted to enter the requested percentage of goal:

  • You first need to identify the percentile column that you are requesting in the corresponding table
  • Then enter the value in the Percentage of Goal row that corresponds with that percentile

Summary of Medical Urgency Goal Points and Percentage of Goal

Medical Urgency Number Waiting 25th percentile Median 75th percentile 90th percentile 95th percentile 99th percentile
Number of Points 972 0.1275 0.3400 0.6950 1.5200 2.8700 19.8475
Percentage of Goal 972 0.5100% 1.3600% 2.7800% 6.0800% 11.4800% 79.3900%

Summary of Post-Transplant Outcomes Goal Points and Percentage of Goal

Post-Transplant Outcomes Number Waiting 25th percentile Median 75th percentile 90th percentile 95th percentile 99th percentile
Number of Points 972 18.3725 19.3725 20.1250 20.7000 21.0300 21.6175
Percentage of Goal 972 73.4900% 77.4900% 80.5000% 82.8000% 84.1200% 86.4700%

Summary of Biological Disadvantages Goal Points and Percentage of Goal

Biological Disadvantages Blood Type Number Waiting 25th percentile Median 75th percentile 90th percentile 95th percentile 99th percentile
Number of Points All Candidates 972 1.0422 5.0305 5.1810 5.6035 6.2850 9.3020
Percentage of Goal All Candidates 972 6.9480% 33.5367% 34.5400% 37.3567% 41.9000% 62.0133%
Number of Points O 609 5.0335 5.1010 5.3085 6.0030 6.8020 9.9240
Percentage of Goal O 609 33.5567% 34.0067% 35.3900% 40.0200% 45.3467% 66.1600%
Number of Points A 260 0.3392 0.4107 0.6117 1.3562 2.4787 5.2112
Percentage of Goal A 260 2.2613% 2.7380% 4.0780% 9.0413% 16.5247% 34.7413%
Number of Points B 87 2.2717 2.3487 2.7832 4.5917 6.7077 7.0557
Percentage of Goal B 87 15.1447% 15.6580% 18.5547% 30.6113% 44.7180% 47.0380%
Number of Points AB 16 0.0335 0.1102 0.5450 0.6935 1.1875 5.1595
Percentage of Goal AB 16 0.2233% 0.7347% 3.6333% 4.6233% 7.9167% 34.3967%

Summary of CAS Subscore (Note: does not include points for efficiency)

Blood Type Number Waiting 25th percentile Median 75th percentile 90th percentile 95th percentile 99th percentile
All Candidates 972 21.4377 24.4055 25.7335 26.9877 30.2527 45.5556
O 609 24.3380 25.1825 26.1365 27.5510 30.1725 46.9250
A 260 19.5797 20.4755 21.3767 23.8192 31.5977 43.0819
B 87 21.7132 22.6232 23.4817 25.9672 26.9877 44.8891
AB 16 19.4415 20.6025 22.0965 24.6020 26.7645 42.6475
a Does not include points for efficiency.

Lung Continuous Distribution

New lung policy took effect March 9, 2023. Resources: UNOS Connect for professional education and the OPTN toolkit for patients and professionals.

Organs shouldn’t be transported in airline cargo. Here’s why.

Organs shouldn’t be transported in airline cargo. Here’s why.

Collage of illustrative images of data from the UNOS Predictive Analytics tool alongside a doctor talking with woman, and a hand resting on a blanket while getting dialysis

Issues and Advocacy

Organs shouldn’t be transported in airline cargo. Here's why.

You wouldn’t ship your dog in cargo, so why would you ship organs there?

You wouldn’t ship your family pet in the cargo space of a commercial airline with bags and packages, so why does the U.S. ship lifesaving, donated organs for transplant in cargo?

Organs cannot move through airport security without a ticketed passenger, so when an organ is unaccompanied, it is relegated to cargo. UNOS is trying to change this outdated policy.

Before the attacks on September 11, 2001, donor organs were transported in the cabin of commercial flights under the watchful eye of the flight crew before being delivered directly to a transplant professional at the gate.

The attacks prompted protocol changes at airports, and since then, organs have been transported with cargo. Today’s rules prevent donation and transplant professionals from accompanying organs through security to and from an aircraft, so precious organs are moved across the country like other cargo.

Transporting organs as cargo is a fundamentally bad practice.

It requires more logistical planning and does not lend itself to the time-sensitive nature of organ transplantation, where every second counts. Donor organs must be transplanted within a specific and limited period of time to patients in need, 365 days a year.

Organs transported by cargo must arrive at the airport 60 to 120 minutes before flight departure. If an organ arrives after the cut-off time, it cannot be transported on that flight. Also, airline cargo offices have highly variable hours, and if an organ arrives at its destination on time but the cargo office is closed, it cannot be collected by a courier.

Logistical delays heighten the risk that a viable organ cannot be transplanted. According to the nation’s Organ Procurement and Transplantation Network, 2.5% of unused organs are due to transportation issues. 

For all of these reasons, UNOS is working to ensure organs can be transported in the cabin of airplanes.

As a result of UNOS-led advocacy, Congress has demanded that the U.S. Department of Transportation and the Federal Aviation Administration convene a working group to fix this issue. That group is expected to make recommendations by the summer of 2025.

Here’s the bottom line

Life-saving organs should not be relegated to airplane cargo bays, where they are more prone to be lost or delayed because of cargo staffing limitations. Transporting life-saving organs in airplane cabins ensures that they will be handled with care and avoid damage, delay or loss, which will help more people get the transplant they need. 

UNOS looks forward to the DOT’s and FAA’s recommendations to once again transport organs in the most efficient and responsible manner: in the aircraft cabin.  While it’s the responsibility of organ procurement organizations – not UNOS – to transport organs, UNOS is committed to making this change to improve patient outcomes and ensure all organs can be transported and transplanted quickly and safely.

We can track Amazon packages-why not lifesaving organs?

We can track Amazon packages-why not lifesaving organs?

Collage of illustrative images of data from the UNOS Predictive Analytics tool alongside a doctor talking with woman, and a hand resting on a blanket while getting dialysis

Issues and Advocacy

We can track Amazon packages — why not lifesaving organs?

UNOS pushes for mandatory organ tracking system

We can track the shoes we ordered from Amazon, and we can follow along as our pizza is baked and delivered by Domino’s. So why shouldn’t we be able to track organs that will save the life of someone in need of a transplant?

Every donated organ is a gift, and should not be lost, delayed in transit or damaged. That’s why UNOS is taking the lead to push for the federal government to mandate the use of physical tracking for unaccompanied deceased donor organs. This is the best way to ensure each gift of life reaches its destination.

Incredibly, there is currently no national tracking system for donor organs. That means organ procurement organizations (OPOs), transplant hospitals and the federal government lack consistent insight into the status of organs during transit to a patient waiting for a transplant.

UNOS has taken action, as a private entity, in developing and launching its own organ tracking solution, currently in use by 12 OPOs across the country.  UNOS’ organ trackers have successfully tracked more than 20,000 organ shipments.

But UNOS’ work is not enough. The federal government must require, develop and enact a solution for national systemwide organ tracking.

A national, centralized and mandatory tracking system would give key organ transplant stakeholders maximum visibility into the transportation of life-saving organs. It would also enable thorough investigations of lost or delayed organs, which is critical to implementing systemwide improvements.

This concept has been discussed for several years but requires federal action. A key priority in 2025 for the new Secretary of the U.S. Department of Health and Human Services should be to direct the Health Resources and Services Administration to establish a federal tracking system that uses physical tracking technology as part of the OPTN modernization efforts. More lives can and will be saved through this change.

90,000 people are waiting for a kidney. Here’s one way to get them a kidney faster.

90,000 people are waiting for a kidney. Here’s one way to get them a kidney faster.

Collage of illustrative images of data from the UNOS Predictive Analytics tool alongside a doctor talking with woman, and a hand resting on a blanket while getting dialysis

Issues and Advocacy

90,000 people are waiting for a kidney. Here's one way to get them a kidney faster.

The IOTA Model will test ways to increase kidney donations

The Medicare Increasing Organ Transplant Access Model 

Did you know that a leading cause of death in the United States is chronic kidney disease, which affects almost 15% of adults and can lead to kidney failure? Dialysis is a lifesaving treatment for kidney failure, but requires the patient to be hooked to a dialysis machine for hours at a time, often for several days each week.

At any given time, nearly 90,000 people in the United States are waiting for a kidney transplant, and 13 people die every day waiting for a kidney.

This cannot continue. That’s why UNOS supports public policy changes to make more kidney transplants possible for Medicare patients.

In late 2024, the Centers for Medicare & Medicaid Services (CMS) released its proposal to help, called the Increasing Organ Transplant Access (IOTA) Model, which will study ways to increase the number of kidney transplants and improve the quality of care for kidney patients. The model will test and determine how financial incentives – and disincentives – for transplant hospitals impact the number of transplants, care quality and equity.

One of the key patient-focused aspects of the IOTA model, advocated for by UNOS, is the requirement for transplant centers to publish the criteria they use to determine whether to add a patient to the kidney transplant waitlist. UNOS believes this is critical to improving transparency for the process and ensuring that the system is patient-centric.

The IOTA model will go into effect on July 1, 2025, and will be in place for six years. UNOS is working with the kidney donation and transplant community to develop products and tools to help transplant hospitals track the IOTA metrics.

Although it is yet to be seen how the change from the Biden to the Trump administration could change the IOTA model or the approach to achieving the goal to increase transplants, UNOS will continue working with the federal government and the organ donation and transplant community to increase transplants and help more people get the lifesaving transplants they need.

A more efficient way to get organs to patients in need

A more efficient way to get organs to patients in need

Collage of illustrative images of data from the UNOS Predictive Analytics tool alongside a doctor talking with woman, and a hand resting on a blanket while getting dialysis

Issues and Advocacy

A more efficient way to get organs to patients in need

This technology, already in use, allows hospitals to automatically refer potential organ donors

Organ donation is a gift of life. It’s also a time-sensitive gift; when an organ becomes available, time is of the essence to ensure it’s able to be transplanted while still viable.

A nationwide nursing shortage, combined with the fact that time is so precious to the organ transplantation process, means that it’s critical that communication is expedited with local organ procurement organizations (OPOs) to make the best use of every gift of life. And with hospitals using electronic health records (EHR), there is an opportunity to improve the efficiency of the organ referral process – the notification process that a potential donor organ meeting predetermined clinical criteria may be available for transplant. In fact, there are pilot studies underway with software that will help overburdened hospital staff save precious minutes and identify more potential deceased organ donors.

UNOS supports mandated automated deceased organ donor referrals, as widespread use could significantly expedite the process of identifying potential organ donors. This will ultimately increase the number of patients who receive lifesaving transplants.

So how does it work?

1Automated electronic deceased donor referrals are used by hospitals to instantly alert OPOs of patients who are candidates for deceased organ donation.

2The technology uses hospital EHR systems to flag patients who are showing signs of imminent death, and then sends an automatic message to the collaborating OPO.

3This referral includes enough information to inform the OPO that they may begin evaluating the patient’s suitability for deceased organ donation. 

While there are successful pilot programs, the referral process is still typically performed manually by hospital staff relying on a nurse to make a phone call. Automating the referral process with software would lift the burden of reporting from busy hospital staff amid the nationwide nursing shortage, reduce the risk of human error and ensure every potential donor is referred. 

Widespread use of automated electronic deceased donor referral could increase donor referrals and therefore organ donors, which would help reduce the number of Americans waiting for a lifesaving organ transplant. 

UNOS calls on Congress to require automated deceased donor referral.

UNOS names 2024 Lisa Schaffner Community Advocate Award recipient

UNOS names 2024 Lisa Schaffner Community Advocate Award recipient

The United Network for Organ Sharing (UNOS) has awarded the 2024 Lisa Schaffner Community Advocate Award to Leslie and Bill Carruth in recognition of their tireless advocacy in memory of their daughter, Alexander “Allie.”

The Lisa Schaffner Community Advocate Award, named after a longtime member of Team UNOS who passed away in 2021, is awarded annually to an unsung hero who has gone above and beyond” to promote organ donation and transplantation. This year’s honorees are donor parents, philanthropists and organ donation advocates who’ve made an impact in Meridian, Mississippi.

In March 2017, Leslie and Bill Carruth tragically lost their 6-year-old daughter, Alexandra (Allie) after an automobile accident. They made the selfless decision to donate her organs to save others when her care team advised she wouldn’t survive.

The Carruths (pictured front row) started the Allie Cat Run and Festival to honor Allie and raise awareness and funds ahead of National Donate Life month.

The event’s theme is daffodils, inspired by Allie’s role as a daffodil in a school play just before she
died. During the play, Allie added an unscripted line: “Have a daffodil day!”

A young girl dressed as a daffodil smiles

Alexander “Allie” Carruth dressed as a daffodil for her school play in 2017.

The first Allie Cat Run and Festival was held on March 24, 2018, with all profits donated to the Mississippi Organ Recovery Agency (MORA).

Over the past seven years, the Carruths have raised more than $500,000, with all proceeds supporting community programs.

Leslie and Bill Carruth have become trusted voices in their community, inspiring others to register as donors and directly encouraging several families in Meridian to choose donation in times of loss. They have also provided comfort to many during their moments of grief. Their impact is evident in the 7% growth of the donor registry in Meridian and nearby areas.

The Carruths have dedicated countless hours to planning the Allie Cat Run & Festival, speaking at public engagements, and working closely with MORA to promote the importance of organ donation. Their work ensures that more people understand the importance of donation, potentially saving countless lives and giving hope to those in need of transplants – all in honor of a little 6-year-old who wanted everyone to “Have a daffodil day!”

Watch their award acceptance


About UNOS

United Network for Organ Sharing (UNOS) is a nonprofit organization focused on saving lives. UNOS’ portfolio encompasses organ donation and transplantation, as well as broader public health projects, through its work developing new technologies and initiatives, conducting data-driven research and analysis, providing expert consulting services, advocating for patients, and being a leader in bringing communities together to save lives. For more than 40 years, UNOS has helped build a national donation and transplantation system that serves as a model around the world.

UNOS has been headquartered in the Richmond area since its founding in 1984. UNOS is also home to the  National Donor Memorial, which honors the life-giving impact of organ and tissue donation.