title: Early detection of hemoperitoneum by ultrasound examination of the right upper quadrant: a multicenter study.
abstract: BACKGROUND
  The focused assessment for the sonographic examination of the trauma patient (FAST) is a rapid diagnostic test that sequentially surveys for hemopericardium and then the right upper quadrant (RUQ), left upper quadrant (LUQ), and pelvis for hemoperitoneum in patients with potential truncal injuries. The sequence of the abdominal part of the examination, however, has yet to be validated. The objectives of this multicenter study were as follows: (1) to determine where hemoperitoneum is most frequently identified on positive FAST examinations; and (2) to determine if a relationship exists between that areas and the organs injured.
  
  
  METHODS
  Ultrasound registries from four Level I trauma centers identified patients who had true-positive FAST examinations. Demographic data, areas positive on the FAST, and organs injured were recorded; injuries were classified as multiple, single solid organ (liver or spleen), isolated hollow viscus, or retroperitoneal. Relationships between positive locations on the FAST examinations and the associations of organs injured to areas positive were assessed using McNamara's chi2 test; a p value < 0.05 was considered statistically significant.
  
  
  RESULTS
  The RUQ was the most common site where hemoperitoneum was detected, and this was statistically significant compared with either the LUQ or the pelvis. Also, statistically significant correlations (p < 0.001) were observed between positive RUQ areas on the FAST and multiple injuries, single solid organ (liver or spleen) injury, and retroperitoneal injuries.
  
  
  CONCLUSIONS
  Blood is most often found on the FAST in the RUQ area in patients with multiple intraperitoneal injuries or isolated injury to the liver, spleen, or retroperitoneum, but not when there is injury to a hollow viscus.
authors.affiliation: Department of Trauma/Surgical Critical Care, Emory University School of Medicine, Grady Memorial Hospital, Atlanta, Georgia 30303, USA.
authors.forename: G S
authors.initials: GS
authors.lastname: Rozycki
authors.forename: M G
authors.initials: MG
authors.lastname: Ochsner
authors.forename: D V
authors.initials: DV
authors.lastname: Feliciano
authors.forename: B
authors.initials: B
authors.lastname: Thomas
authors.forename: B R
authors.initials: BR
authors.lastname: Boulanger
authors.forename: F E
authors.initials: FE
authors.lastname: Davis
authors.forename: R E
authors.initials: RE
authors.lastname: Falcone
authors.forename: J A
authors.initials: JA
authors.lastname: Schmidt
mesh_terms: D000007:Abdominal Injuries / Q000145:classification / Q000150:complications*; D000293:Adolescent; D000328:Adult; D000368:Aged; D006465:Hemoperitoneum / Q000000981:diagnostic imaging* / Q000209:etiology; D006801:Humans; D015601:Injury Severity Score; D008875:Middle Aged; D015203:Reproducibility of Results; D012189:Retrospective Studies; D012680:Sensitivity and Specificity; D013997:Time Factors; D014193:Trauma Centers; D014463:Ultrasonography