Hydronephrosis Index: A Better Physiological Reference in Antenatal Ultrasound for Assessment of Fetal Hydronephrosis - 08/08/11
Résumé |
Objective |
To establish a nomogram of fetal hydronephrosis index (HI) (anteroposterior diameter of renal pelvis divided by urinary bladder volume) at different gestational ages, to serve as a new reference for antenatal ultrasound examination, and to avoid overestimation of fetal hydronephrosis due to transient effect of a distended fetal bladder.
Study design |
504 uncomplicated singleton pregnancies from 20 to 38 weeks' gestation were included. In each fetus, the maximum anteroposterior diameters of both renal pelves were measured on transverse view of fetal kidneys. Urinary bladder volume was calculated using the ovoid volume formula. HI was derived accordingly.
Results |
Values of HI vary significantly at different trimesters of pregnancy. HI was much higher (mean = 0.1543) from 20 to 27 weeks' gestation, and its value decreased significantly (mean = 0.0253) from 28 to 38 weeks' gestation (P < .05, independent-sample t test). As gestational age increased, HI decreased (R2 = 0.5921).
Conclusions |
HI is easy to be measured and can be used as a new physiological reference for assessment of fetal hydronephrosis by eliminating the confounding effect of a full fetal bladder. The change in values of HI throughout gestation supports the clinical importance of a nomogram for this new index.
Le texte complet de cet article est disponible en PDF.Abbreviations : AP, GA, HI, PC, UBV
Plan
The authors declare no potential conflict of interest, real or perceived, from any sponsorship. |
Vol 154 - N° 1
P. 116-120 - janvier 2009 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
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