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The organ donation and transplantation system in Canada is currently transforming from a fragmented system with stagnant performance to a collaborative system with sustained incremental improvement. A potential donor intersects with the health care system in a predictable trajectory, from prehospital care to emergency department to intensive care unit to operating room. The transition from attempts to save a life, to acceptance of inevitable death, to organ donation is a complex, fragile and emotionally challenging, albeit predictable, process for both families and health care providers. Optimization of each step is required to improve the system. Here, Shemie discusses the recent policy changes to increase deceased organ donation.

A decision to withdraw life-sustaining treatment (WLST) is derived by a conclusion that further treatment will not enable a patient to survive or will not produce a functional outcome with acceptable quality of life that the patient and the treating team regard as beneficial. Although many hospitalized patients die under such circumstances, controlled donation after the circulatory determination of death (cDCDD) programs have been developed only in a reduced number of countries. This International Collaborative Statement aims at expanding cDCDD in the world to help countries progress towards self-sufficiency in transplantation and offer more patients the opportunity of organ donation. The Statement addresses three fundamental aspects of the cDCDD pathway. First, it describes the process of determining a prognosis that justifies the WLST, a decision that should be prior to and independent of any consideration of organ donation and in which transplant professionals must not participate. Second, the Statement establishes the permanent cessation of circulation to the brain as the standard to determine death by circulatory criteria. Death may be declared after an elapsed observation period of 5 min without circulation to the brain, which confirms that the absence of circulation to the brain is permanent. Finally, the Statement highlights the value of perfusion repair for increasing the success of cDCDD organ transplantation. cDCDD protocols may utilize either in situ or ex situ perfusion consistent with the practice of each country. Methods to accomplish the in situ normothermic reperfusion of organs must preclude the restoration of brain perfusion to not invalidate the determination of death.

Introduction A chronic shortage of organs remains the main factor limiting organ transplantation. Many countries have explored the option of uncontrolled donation after circulatory death (uDCD) in order to expand the donor pool. Little is known regarding the variability of practices and outcomes between existing protocols. This systematic review addresses this knowledge gap informing policy makers, researchers, and clinicians for future protocol implementation. Methods We searched MEDLINE, EMBASE, and Google Scholar electronic databases from 2005 to March 2015 as well as the reference lists of selected studies, abstracts, unpublished reports, personal libraries, professional organization reports, and government agency statements on uDCD. We contacted leading authors and organizations to request their protocols and guidelines. Two reviewers extracted main variables. In studies reporting transplant outcomes, we added type, quantity, quality of organs procured, and complications reported. Internal validity and the quality of the studies reporting outcomes were assessed, as were the methodological rigour and transparency in which a guideline was developed. The review was included in the international prospective register of systematic reviews (Prospero, CRD42014015258). Results Six guidelines and 18 outcome studies were analysed. The six guidelines are based on limited evidence and major differences exist between them at each step of the uDCD process. The outcome studies report good results for kidney, liver, and lung transplantation with high discard rates for livers. Conclusions Despite procedural, medical, economic, legal, and ethical challenges, the uDCD strategy is a viable option for increasing the organ donation pool. Variations in practice and heterogeneity of outcomes preclude a meta-analysis and prevented the linking of outcomes to specific uDCD protocols. Further standardization of protocols and outcomes is required, as is further research into the role of extracorporeal resuscitation and other novel therapies for treatment of some refractory cardiac arrest. It is essential to ensure the maintenance of trust in uDCD programs by health professionals and the public.

In Canada, organ donation from deceased donors is a common practice that saves or improves the lives of more than nearly 2000 Canadians every year, accounting for more than 3 of 4 of all transplanted organs. Deceased donation is permitted after either neurologic or circulatory determination of death, with the latter accounting for 25% of all organs donated in Canada in 2017.1 The current Canadian guideline recommendations for donation after circulatory determination of death, published in 2006, address the conventional scenario of an unconscious, incapable, critically ill patient not expected to survive the withdrawal of life-sustaining measures. The target audience of this guidance consists of clinicians, organ donation organizations, end-of-life care experts, medical assistance in dying providers and policy-makers. This document is intended to inform policies related to offering organ and tissue donation to patients who have made a decision that will lead to imminent death.

Introduction and Methods This report summarizes the results of the first phase in the development of international guidelines for death determination, focusing on the biology of death and the dying process, developed by an invitational forum of international content experts and representatives of a number of professional societies. Results and Conclusions Precise terminology was developed in order to improve clarity in death discussion and debate. Critical events in the physiological sequences leading to cessation of neurological and/or circulatory function were constructed. It was agreed that death determination is primarily clinical and recommendations for preconditions, confounding factors, minimum clinical standards and additional testing were made. A single operational definition of human death was developed: ‘the permanent loss of capacity for consciousness and all brainstem functions, as a consequence of permanent cessation of circulation or catastrophic brain injury’. In order to complete the project, in the next phase, a broader group of international stakeholders will develop clinical practice guidelines, based on comprehensive reviews and grading of the existing evidence.

Shemie comments on the recent observed improvements in deceased organ donation and transplant rates in Ontario and Canada by Rao and colleagues, the demographic shifts in the cause of death before organ donation, with a decreasing incidence of traumatic brain injury and the anoxic brain injury after resuscitated cardiac arrest which become the leading cause of death that results in deceased organ donation. Shemie emphasizes the need for Canada to require ongoing and increasing effort despite the authors conclusion that there is no evidence that the use of DCD was pre-empting potential donations following neurologic death.