title: Influence of water intake on the waiting time prior to gynecologic transabdominal ultrasound.
abstract: OBJECTIVE
  To investigate the effect of volume of water intake on the length of time before the bladder is sufficiently full prior to undergoing transabdominal ultrasound.
  
  
  METHODS
  Ninety-three patients scheduled for transabdominal ultrasound were enrolled between November 2007 and April 2008 and randomly allocated to 3 study groups by volume of water intake: 300, 400, and 500 mL. The total waiting time was recorded when the bladder was sufficiently full to undergo transabdominal ultrasound. The final bladder volume was measured using three-dimensional ultrasound.
  
  
  RESULTS
  Mean waiting times were 68.65+/-30.12 min, 64.2+/-26.18 min, and 54.38+/-12.75 min for patients ingesting 300, 400, and 500 mL of water, respectively (P=0.060). The final bladder volumes for the 3 groups were not statistically different (263.06+/-99.21 mL, 275.37+/-113.05 ml, and 316.17+/-101.31 mL; P=0.113).
  
  
  CONCLUSIONS
  Differences in the volume of water ingested in the range of 300-500 mL did not affect the waiting time before undergoing transabdominal ultrasound.
authors.affiliation: Department of Obstetrics and Gynecology, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand.
authors.forename: Vitaya
authors.initials: V
authors.lastname: Titapant
authors.forename: Nisarat
authors.initials: N
authors.lastname: Phithakwatchara
authors.forename: Prakong
authors.initials: P
authors.lastname: Chuenwattana
authors.forename: Pornpen
authors.initials: P
authors.lastname: Tontisirin
authors.forename: Sommai
authors.initials: S
authors.lastname: Viboonchard
authors.forename: Watcharaporn
authors.initials: W
authors.lastname: Butsansee
mesh_terms: D000005:Abdomen / Q000000981:diagnostic imaging; D000328:Adult; D004326:Drinking / Q000502:physiology*; D005260:Female; D006801:Humans; D008875:Middle Aged; D009929:Organ Size; D013997:Time Factors; D014463:Ultrasonography; D001743:Urinary Bladder / Q000000981:diagnostic imaging*; D014867:Water / Q000008:administration & dosage*
chemical_list: D014867:Water