[A riverine emergency health service: characteristics and factors related to patients' clinical evolution].

The study aimed to describe the profile of patients and the care provided by the Mobile Riverine Emergency Medical Service (SAMU) in river-dwelling communities of the Amazon and to identify factors related to patients' evolution during care by this service. This descriptive study was conducted in two stages: in the first, the data were obtained on care for individuals in the service from 2009 to 2015; in the second, the data collection was prospective during the first semester of 2016, and patients' evolution was assessed with the Rapid Emergency Medicine Score. In all the periods analyzed, some 90% of the care included medical evacuation, varying over the years as to the type of boat used most frequently in transporting the patients.