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Proposal to Modify the Adult Heart Allocation System: Round 2. Thoracic Organ Transplantation Committee. What problems will the proposal solve?. High waiting list mortality rates, particularly for the most urgent candidates
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Proposal to Modify the Adult Heart Allocation System: Round 2 Thoracic Organ Transplantation Committee
What problems will the proposal solve? • High waiting list mortality rates, particularly for the most urgent candidates • High # of exception requests indicates certain candidates not served well by current system • Policy out of date re: increased use of mechanical circulatory support devices (MCSD) and associated complications • Current geographic sharing scheme is inequitable and inconsistent with the Final Rule
January 2016 Proposal • Added more urgency stratifications based on relative waiting list mortality rates for all adult heart candidates • Modified geographic sharing scheme to provide most urgent candidates access to donors from a broader geographic area
Feedback to January 2016 Proposal Themes related to statuses • Distinguish between patient need and therapeutic preference • Define biventricular heart failure rather than treatment employed • Limit time for highest priority statuses to combat potential behavior changes • Better define qualifying devices for each status • Still split on VAD for 30 days
Feedback to January 2016 Proposal Themes related to broader sharing • Support: • Don’t have to accept an organ from farther away just because it’s offered • Distance doesn’t necessarily translate to longer ischemic time • Current boundaries are arbitrary • Organs are a shared national resource • Oppose • Concern about cost/difficulty of more remote recoveries • Will increase ischemic time affecting outcomes • Harm to relationships between OPOs & hospitals • Zone B is too far • Policy changes should be made one at a time
Supporting Evidence • TSAM supports framework established in original proposal • Clinical consensus from public comment and post-public comment outreach informed proposed physiologic criteria used to refine statuses
Survey Results Summary • VA ECMO: ~80% supported VA ECMO in Status 1 • Over half supported extension at Status 1 • 60% preferred requiring failed weaning for extension • Percutaneous devices: ~40% preferred 14 days in Status 2, though 30% preferred unlimited time • >60% of both groups of respondents preferred failed weaning for extension • Stable LVAD: 55% supported 30 days of elective Status 3 time for stable LVAD • Geography: >60% preferred sharing just through DSA + Zone A • Of these respondents, 55% preferred sharing only for Status 1 and 42% preferred both Status 1 and 2
What are the proposed solutions? *Non-dischargeable refers to devices that are not FDA approved for use outside the hospital
How will the OPTN implement this proposal? • Target Board Date: Dec. 2016 • Effective date depends on programming • UNOS will give members time to update their candidate data before implementation • Members will need to verify information after implementation date • Exceptions (approved and in flight) will be null upon implementation • Accumulated waiting time will transfer • Proposal does not affect methods for routine monitoring
Questions? Kevin Chan, M.D. Committee Chair kevichan@med.umich.edu Liz Robbins Callahan, Esq. Project Liaison Liz.robbins@unos.org
Proposed Statuses 4-6 *Candidates may qualify for more than one status, but their programs should register them in the most urgent status for which they qualify **Transplant programs can request exceptions to register candidates in statuses 1-4 if they don’t qualify based on policy but are as urgent as other candidates in those statuses
AHA Definition of Cardiogenic shock • The definition of CS includes hemodynamic parameters: persistent hypotension (systolic blood pressure <80 to 90 mm Hg or mean arterial pressure 30 mm Hg lower than baseline) with severe reduction in cardiac index (<1.8 L/min/m2 without support or <2.0 to 2.2 L/min/m2 with support) and adequate or elevated filling pressure (eg, left ventricular [LV] end-diastolic pressure >18 mm Hg or right ventricular [RV] end-diastolic pressure >10 to 15 mm Hg).
Proposed Data Elements • Refer to Appendix B for the full list of proposed data elements • We are seeking your input regarding all these data points, and how often to report them (especially for the lower urgency candidates). • These data will inform a heart allocation score in the future
Regional Review Board Changes • RRBs will review exceptions and extensions for Statuses 1-4 • RRBs will review cases outside of their region to eliminate some risk of bias in reviewing cases from their own region