title: [Is the stomach a main landmark on the abdominal circumference? Audit of 3 operators].
abstract: OBJECTIVE
  The fetal weight estimation depends largely on the accuracy of abdominal circumference. The quality criteria are standardized to minimize variability and include visualization of the stomach. The objective of this study is to investigate the presence or absence of the stomach on the abdominal circumference for 3 different operators.
  
  
  METHODS
  We conducted re-reading of 204 ultrasound images in the second and third trimester of pregnancy, performed by three operators, at the maternity Port Royal in Paris in 2013. On these images, the presence of the stomach was sought and other quality criteria were verified.
  
  
  RESULTS
  Among the 204 images, 166 included the stomach (81%). When studying for each of the three operators, there were 79%, 72% and 98% of the stomach into the abdominal circumference, a significant difference between operators (P=0.0029). Regarding the secondary criteria, the quality criteria found most often were the calipers and well placed ellipse (89%).
  
  
  CONCLUSIONS
  According to the previous studies, the stomach seems to be a reference to search. Our study shows variability depending on the different operators. If a hierarchy of quality criteria is to be considered, the stomach does not seem to be the first criterion to search.
authors.affiliation: Maternité Port Royal, groupe hospitalier Cochin-Hôtel-Dieu, AP-HP, 53, avenue de l'Observatoire, 75679 Paris cedex 14, France. Electronic address: annecharlotte.laurent@gmail.com.
authors.forename: A-C
authors.initials: AC
authors.lastname: Laurent
authors.affiliation: Maternité Port Royal, groupe hospitalier Cochin-Hôtel-Dieu, AP-HP, 53, avenue de l'Observatoire, 75679 Paris cedex 14, France.
authors.forename: J
authors.initials: J
authors.lastname: Blanc
authors.affiliation: Maternité Port Royal, groupe hospitalier Cochin-Hôtel-Dieu, AP-HP, 53, avenue de l'Observatoire, 75679 Paris cedex 14, France.
authors.forename: G
authors.initials: G
authors.lastname: Grangé
mesh_terms: D000005:Abdomen / Q000196:embryology*; D000886:Anthropometry; D005260:Female; D020567:Fetal Weight; D005865:Gestational Age; D006801:Humans; D011247:Pregnancy; D013270:Stomach / Q000196:embryology*; D016216:Ultrasonography, Prenatal
keywords: Abdominal circumference; Biométries fœtales; Fetal biometry; Mesure échographique; Périmètre abdominal; Reproducibility; Reproductibilité; Ultrasound measurement