Ultrasonographic evaluation of bladder volume in young children.
We investigated by ultrasonography the bladders of 30 young children (26 boys, 4 girls) without established bladder control immediately before voiding cystourethrography. The anterior/posterior (D), superior/inferior (H) and transverse dimension (W) of the bladder were determined. The small children had a significantly greater H value compared with D and W than older children in our previous study in 1993. The regression equation for D x H x W and actual bladder volume in 30 infants was calculated as y = 0.49 x + 3 (Eq. 1). When bladder volume of the 30 infants was estimated from D x H x W, the mean percentage error was much lower with Eq. 1 than with Eq. 2 (y = 0.68 x + 4), which had been determined for older children (mean +/- SD 16.8% +/- 10.7% vs. 44.7% +/- 26.2%) (P < 0.01). Thus, infants have a different bladder shape than older children and their bladder volume should be estimated using a specific formula designed for them.
Hiraoka
M
M
Department of Paediatrics, Fukui Medical School, Japan.
Hori
C
C
Tsuchida
S
S
Sudo
M
M
D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D012189:Retrospective Studies; D014463:Ultrasonography; D001743:Urinary Bladder / Q000000981:diagnostic imaging*; D014741:Video Recording