title: Comparative analysis of the frequency and the severity of diagnosed lesions between pedestrians struck by motor vehicles and other blunt trauma mechanisms victims.
abstract: OBJECTIVE
  to compare the frequency and the severity of diagnosed injuries between pedestrians struck by motor vehicles and victims of other blunt trauma mechanisms.
  
  
  METHODS
  retrospective analysis of data from the Trauma Registry, including adult blunt trauma patients admitted from 2008 to 2010. We reviewed the mechanism of trauma, vital signs on admission and the injuries identified. Severity stratification was carried using RTS, AIS-90, ISS e TRISS. Patients were assigned into group A (pedestrians struck by motor vehicle) or B (victims of other mechanisms of blunt trauma). Variables were compared between groups. We considered p<0.05 as significant.
  
  
  RESULTS
  a total of 5785 cases were included, and 1217 (21,0%) of which were in group A. Pedestrians struck by vehicles presented (p<0.05) higher mean age, mean heart rate upon admission, mean ISS and mean AIS in head, thorax, abdomen and extremities, as well as lower mean Glasgow coma scale, arterial blood pressure upon admission, RTS and TRISS. They also had a higher frequency of epidural hematomas, subdural hematomas, subarachnoid hemorrhage, brain swelling, cerebral contusions, costal fractures, pneumothorax, flail chest, pulmonary contusions, as well as pelvic, superior limbs and inferior limbs fractures.
  
  
  CONCLUSIONS
  pedestrian struck by vehicles sustained intracranial, thoracic, abdominal and extremity injuries more frequently than victims of other blunt trauma mechanism as a group. They also presented worse physiologic and anatomic severity of the trauma.
authors.affiliation: Disciplina de Cirurgia de Urgência, Departamento de Cirurgia, Faculdade de Ciências Médicas da Santa Casa de São Paulo, SP, Brasil.
authors.forename: José Gustavo
authors.initials: JG
authors.lastname: Parreira
authors.affiliation: Departamento de Cirurgia, Irmandade da Santa Casa de Misericórdia de São Paulo, SP, Brasil.
authors.forename: Rafael Krieger
authors.initials: RK
authors.lastname: Martins
authors.affiliation: Departamento de Cirurgia, Irmandade da Santa Casa de Misericórdia de São Paulo, SP, Brasil.
authors.forename: Julio
authors.initials: J
authors.lastname: Slongo
authors.affiliation: Disciplina de Cirurgia de Urgência, Departamento de Cirurgia, Faculdade de Ciências Médicas da Santa Casa de São Paulo, SP, Brasil.
authors.forename: Jacqueline A Giannini
authors.initials: JA
authors.lastname: Perlingeiro
authors.affiliation: Disciplina de Cirurgia de Urgência, Departamento de Cirurgia, Faculdade de Ciências Médicas da Santa Casa de São Paulo, SP, Brasil.
authors.forename: Silvia Cristine
authors.initials: SC
authors.lastname: Soldá
authors.affiliation: Disciplina de Cirurgia de Urgência, Departamento de Cirurgia, Faculdade de Ciências Médicas da Santa Casa de São Paulo, SP, Brasil.
authors.forename: José Cesar
authors.initials: JC
authors.lastname: Assef
mesh_terms: D000063:Accidents, Traffic; D000328:Adult; D006801:Humans; D015601:Injury Severity Score; D000069636:Pedestrians; D012189:Retrospective Studies; D014949:Wounds, Nonpenetrating / Q000175:diagnosis* / Q000453:epidemiology*