acuteadultsamyloidanticoagulantscarecovidcreatingdeliriumdementiadepartmentdiagnoseedelderlyememergenciesemergencyeyefailurefallsfrailtygeriatricgettinghelphighidentifyinterveneknowmanagementneednextolderpainpatientpatientspearlsphysicianspreventingrisksafetargetingtoxicologytreatments