Halim Lim, Aidi Aswadi and Abd. Aziz, Azian
(2021)
Sonographic renal length in Malaysian infant population - a hospital based cross
section study.
In: 19th Asian Oceanian Congress of Radiology (AOCR), 1 - 4 JULY 2021, Malaysia.
(Unpublished)
Abstract
Objective: The neonatal stage is an important period of organ development whereby an insult could result in organ impairment. The
kidneys demonstrate similar predisposition. Renal ultrasonography is crucial in examining the kidneys, including the renal length. The
lack of local data means Malaysian doctors are dependent on data from other populations, which may not be locally suitable. Therefore, the objective of this paper is to determine the range of normal sonographic renal length amongst infant up to 1 year old in
IIUMMC and HTAA Kuantan, Malaysia, to investigate sonographic renal lengths differences between male and female infants and to
propose simple mathematical equations to estimate ideal renal length based on infant’s age.
Materials & Methods: All children under the age of 1 who had normal ultrasound of the kidneys were included. Five age groups were
formed based on examples from previous studies. Data were mined from the Radiology Information Systems of both centres. 463 cases
were selected. Important data were obtained – the infant’s age, gender and their sonographic renal lengths for both kidneys. Their
respective sonographic renal lengths were tabulated according to their age group, following which a group mean and 95% confidence
interval were derived.
Results: We tabulated the means and 95% confidence intervals for both right and left kidneys separately for each group. No significant difference in the sonographic renal lengths between the genders identified. Two separate linear regression equations were
formulated for the right and left kidneys.
Conclusion: We formulated a table of normal sonographic renal lengths according to age for infants, useful in day-to-day practice.
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