ABSTRACT
BACKGROUND: Demographic change, medical progress, pandemics, and mass casualty events may cause an increased demand for intensive and emergency medical care resources. There is thus a definite need for fair allocation criteria. OBJECTIVE: The rationale, structure, and criteria for allocation of intensive and emergency medical care resources are presented and discussed. MATERIALS AND METHODS: Analysis and discussion of German literature about the topic. RESULTS AND CONCLUSIONS: Decisions on the allocation of intensive and emergency medical care resources are made on different levels (micro-, meso-, and macrolevel). They shall fulfill minimum demands in terms of procedure and content. Consequent and careful examination of indication and evidence of therapeutic decisions as well as consequent and careful examination of the patient's definite or presumed consent helps to take responsibility for fair allocation decisions.
Subject(s)
Emergency Medical Services , Triage , Critical Care , Health Care Rationing , Humans , Pandemics , Resource AllocationABSTRACT
BACKGROUND AND CHALLENGE: Injuries, especially traumatic brain injury, or specific illnesses and their respective sequelae can result in the demise of the patients afflicted despite all efforts of modern intensive care medicine. If in principle organ donation is an option after a patient's death, intensive therapeutic measures are regularly required in order to maintain the homeostasis of the organs. These measures, however, cannot benefit the patient afflicted anymore-which in turn might lead to an ethical conflict between dignified palliative care for him/her and expanded intensive treatment to facilitate organ donation for others, especially if the patient has opted for the limitation of life-sustaining therapies in an advance directive. METHOD: The Ethics Section and the Organ Donation and Transplantation Section of the German Interdisciplinary Association of Critical Care and Emergency Medicine (DIVI) have convened several meetings and a telephone conference and have arrived at a decision-making aid as to the extent of treatment for potential organ donors. This instrument focusses first on the assessment of five individual dimensions regarding organ donation, namely the certitude of a complete and irreversible loss of all brain function, the patient's wishes as to organ donation, his or her wishes as to limiting life-sustaining therapies, the intensity of expanded intensive treatment for organ protection and the odds of its successful attainment. Then, the combination of the individual assessments, as graphically shown in a {Netzdiagramm}, will allow for a judgement as to whether a continuation or possibly an expansion of intensive care measures is ethically justified, questionable or even inappropriate. RESULT: The aid described can help mitigate ethical conflicts as to the extent of intensive care treatment for moribund patients, when organ donation is a medically sound option. NOTE: Gerald Neitzke und Annette Rogge contributed equally to this paper and should be considered co-first authors.
Subject(s)
Decision Making , Emergency Medicine , Organ Transplantation , Tissue and Organ Procurement , Critical Care , Humans , Organ Transplantation/ethics , Tissue Donors , Tissue and Organ Procurement/ethicsABSTRACT
Essentials Factor VII-activating protease (FSAP) is a plasma protease involved in vascular processes. Neointima formation was investigated after vascular injury in FSAP-/- mice. The neointimal lesion size and the accumulation of macrophages were increased in FSAP-/- mice. This was due to an increased activity of the chemokine (C-C motif) ligand 2 (CCL2). SUMMARY: Background Factor VII-activating protease (FSAP) is a multifunctional circulating plasma serine protease involved in thrombosis and vascular remodeling processes. The Marburg I single-nucleotide polymorphism (MI-SNP) in the FSAP-coding gene is characterized by low proteolytic activity, and is associated with increased rates of stroke and carotid stenosis in humans. Objectives To determine whether neointima formation after vascular injury is increased in FSAP-/- mice. Methods and Results The neointimal lesion size and the proliferation of vascular smooth muscle cells (VSMCs) were significantly enhanced in FSAP-/- mice as compared with C57BL/6 control mice after wire-induced injury of the femoral artery. Accumulation of leukocytes and macrophages was increased within the lesions of FSAP-/- mice at day 3 and day 14. Quantitative zymography demonstrated enhanced activity of gelatinases/matrix metalloproteinase (MMP)-2 and MMP-9 within the neointimal lesions of FSAP-/- mice, and immunohistochemistry showed particular costaining of MMP-9 with accumulating leukocytes. Using intravital microscopy, we observed that FSAP deficiency promoted the intravascular adherence and the subsequent transmigration of leukocytes in vivo in response to chemokine ligand 2 (CCL2). CCL2 expression was increased in FSAP-/- monocytes but not in the vessel wall. There was no difference in the expression of platelet-derived growth factor (PDGF-BB). Conclusions FSAP deficiency causes an increase in CCL2 expression and CCL2-mediated infiltration of leukocytes into the injured vessel, thereby promoting SMC proliferation and migration by the activation of leukocyte-derived gelatinases. These results provide a possible explanation for the observed association of the loss-of-function MI-SNP with vascular proliferative diseases.
