Role of fetal kidney length in estimation of gestational age

Luther, Neelu; Patnaik, Vvg; Puri, Neelu; Mittal, Aliza

doi:10.1016/j.jasi.2016.08.186

Cited by 2 publications

(3 citation statements)

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“…Mean kidney length and breadth in the present study were 39.02±6.136 mm, 18.61±3.331 mm on the right and 39.19±4.379 mm, 18.85±2.876 mm on the left side, and statistically comparable (p=0.332 and 0.1651, respectively). The other studies [ 8 , 17 ] also suggest that there is no significant difference between right and left kidney length and breadth (42.1±0.45 mm vs. 43.2±0.46 mm) [ 9 ], (41.35±1.65 mm vs. 42.17±1.63 mm ), and (38.6± 2.2 mm vs. 38.9±2.2 mm) [ 21 ]. In all studies, the left kidney size was more than the right kidney size, although the difference was not statistically significant [ 9 , 26 ].…”

Section: Discussionmentioning

confidence: 93%

“…The other studies [ 8 , 17 ] also suggest that there is no significant difference between right and left kidney length and breadth (42.1±0.45 mm vs. 43.2±0.46 mm) [ 9 ], (41.35±1.65 mm vs. 42.17±1.63 mm ), and (38.6± 2.2 mm vs. 38.9±2.2 mm) [ 21 ]. In all studies, the left kidney size was more than the right kidney size, although the difference was not statistically significant [ 9 , 26 ].…”

Section: Discussionmentioning

confidence: 93%

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Estimation of Kidney Size From Foot Length in Newborns: A Cross-Sectional Study

Tummuri¹,

Siddiqui²,

Nelanuthala³

et al. 2022

Cureus

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Background Kidney size determination and sonographic follow-up are important in clinical diagnosis and treatment in children. Various anthropometric measurements are correlated with gestational age and birth weight and are used to identify high-risk babies in need of early interventions. Although foot length has emerged as a simple and reliable anthropometric measurement, it is not correlated with kidney size, except in the fetal period. This study was undertaken to find a correlation between foot length and kidney dimensions and estimate kidney size by finding regression equations in newborns. Methods We conducted a cross-sectional study and 216 newborns were enrolled at a tertiary care hospital. Foot length was measured by digital Vernier calipers and kidney dimensions were measured by ultrasonography. The Pearson correlation coefficient and simple linear regression tests were used to determine the relationship between foot length and kidney dimensions. Results Foot lengths and kidney dimensions were comparable in males and females as well as on the right and left sides, except for kidney length, which was found to be longer in males. Both right and left foot lengths showed highly significant (p<0.001) but small, positive correlations with corresponding side kidney length, breadth, and area, with R-values ranging from 0.2874 to 0.3668. However, the correlation between birth weight and foot length was significant, positive, and moderate (r=0.6962 and 0.6923 for right and left foot lengths, respectively). The regression equation for estimation of kidney size from foot length was obtained but the variance explained was small (e.g. R 2 =0.1325 for right kidney length). Out of 216 babies in our study, 10 babies had a renal anomaly. Conclusions We found a significant but small, positive correlation between foot length and kidney dimensions. Only 13.25% of the variance in kidney length was associated with foot length. Birth weight also had a significant and positive but small correlation with kidney dimensions. However, the correlation of birth weight with foot length was moderate, and a 57.14% variance in foot length was associated with birth weight. Multivariate regression analysis with more anthropometric parameters and gestational age may help in finding a better estimation of kidney size.

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Section: Discussionmentioning

confidence: 93%

Section: Discussionmentioning

confidence: 93%

Estimation of Kidney Size From Foot Length in Newborns: A Cross-Sectional Study

Tummuri¹,

Siddiqui²,

Nelanuthala³

et al. 2022

Cureus

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“…In early pregnancy, GA is usually estimated accurately by using the gestational sac diameter and CRL, and later in pregnancy, other foetal biometric parameters (BPD, HC, FL, AC) become more appropriate. Researches have suggested that FKL is more accurate in estimating GA compared to the other biometric indices in the second half of pregnancy ( 4 , 7 , 13 , 20 – 22 ).…”

Section: Discussionmentioning

confidence: 99%

Ultrasound Measurement of Foetal Kidney Length during Healthy Pregnancy: Relationship with Gestational Age

Oriji

Briggs

et al. 2023

Ethiop J Health Sci

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BACKGROUND: Foetal kidney length (FKL) measurements and comparisons to normal charts can be used to assess the development of the foetal kidneys throughout the entire course of pregnancy. This study was designed to assess FKL between 20 – 40 weeks’ gestation, establish reference ranges for FKL and determine the relationship between FKL and gestational age (GA) in normal pregnancy. METHODS: This descriptive, cross-sectional study was conducted between March-August 2022, at the Obstetric Units and Radiology Departments of the two tertiary health facilities, one secondary facility and one radio-diagnostic facility in Bayelsa State, Southern Nigeria. Transabdominal ultrasound scan was used to evaluate the foetal kidneys. The relationship between foetal kidney dimensions and GA was explored using Pearson's correlation analysis. Linear regression analysis was done to define the relationship between GA and mean kidney length (MKL). A nomogram predicting GA from MKL was constructed. Level of significance was set at p<0.05. RESULTS: There was a very strong significant correlation between foetal renal dimensions and GA. The correlation coefficient between GA and mean FKL, width and anteroposterior diameter were 0.89 (p=0.001), 0.87 (p=0.001) and 0.82 (p=0.001), respectively. A unit change in mean FKL corresponded to a 79% change in GA (ɼ2), showing a very strong association between mean FKL and GA. The regression equation: GA = 9.87 + 5.91 x MKL, was derived for estimation of GA for a given MKL. CONCLUSION: Our study revealed a significant relationship between FKL and GA. The FKL can therefore be reliably used to estimate GA.

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Role of fetal kidney length in estimation of gestational age

Cited by 2 publications

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Estimation of Kidney Size From Foot Length in Newborns: A Cross-Sectional Study

Estimation of Kidney Size From Foot Length in Newborns: A Cross-Sectional Study

Ultrasound Measurement of Foetal Kidney Length during Healthy Pregnancy: Relationship with Gestational Age

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