Diagnostic ultrasound ( PDFDrive )

1780 PART V Pediatric Sonography
TABLE 52.6 Shape and Correction Coeficient (k) for Bladder Volume
Bladder Shape k (SE) Pearson r P Value Mean Percentage Error ± SD
Whole sample a 0.66 (0.011) 0.927 <.01 19.19 ± 9.59
Round 0.561 (0.013) 0.940 <.01 5.10 ± 8.30
Cuboid 0.923 (0.012) 0.982 <.01 5.53 ± 6.86
Ellipsoid 0.802 (0.006) 0.992 <.01 3.09 ± 3.52
Triangular 0.623 (0.007) 0.988 <.01 7.71 ± 8.66
Undeined 0.749 (0.048) 0.976 <.01 15.18 ± 17.21
a Regardless of shape.
SD, Standard deviation; SE, standard error.
With permission from Kuzmic AC, Brkljacic B, Ivankovic D. The impact of bladder shape on the ultrasonographic measurement of bladder
volume in children. Pediatr Radiol 2003;33:530-534. 13
60
60
50
50
Length (mm)
40
Length (mm)
40
30
30
20
20
A
1000 2000 3000 4000 5000
Birth weight (g)
27 29 31 33 35 37 39 41
Gestational age (weeks)
FIG. 52.3 Kidney Length Versus Birth Weight (A) and Gestational Age (B). (With permission from Chiara A, Chirico G, Barbarini M, et al.
Ultrasonic evaluation of kidney length in term and preterm infants. Eur J Pediatr. 1989;149[2]:94-95. 11 )
B
A
B
FIG. 52.4 Bladder Volume. (A) Longitudinal midline image. (B) Transverse image. Length (+), width (arrows), and anteroposterior dimension
(*) measured along the inner wall. Bladder wall thickness (arrowheads) measured along posterior wall.