ESPN 50th Annual Meeting

ESPN 2017


 
ULTRASONOGRAPHIC ASSESSMENT OF KIDNEY LENGTH IN HEALTHY FULL-TERMED TWIN INFANTS COMPARED WITH SINGLETON INFANTS
KRISTINA DRNASIN 1 MIRNA SARAGA-BABIć 2 KATARINA VUKOJEVIć 3 MARIJAN SARAGA 4

1- PAEDIATRIC OUTPATIENT CLINIC, SOLIN, CROATIA
2- DEPARTMENT OF ANATOMY, HISTOLOGY AND EMBRYOLOGY, SCHOOL OF MEDICINE, UNIVERSITY OF SPLIT, SPLIT, CROATIA
3- DEPARTMENT OF HISTOLOGY AND EMBRYOLOGY, SCHOOL OF MEDICINE, UNIVERSITY OF MOSTAR, BOSNIA AND HERZEGOVINA
4- DEPARTMENT OF PAEDIATRICS, UNIVERSITY HOSPITAL IN SPLIT, SPLIT, CROATIA
 
Introduction:

To compare kidney lengths, birth lengths and weights of healthy full-termed twins with singleton infants.

Material and methods:

Utrasonographic measurements of kidney lengths were performed on 1073 on time-born singleton infants (2146 healthy kidneys, 549 boys, 524 girls) (group A) and 87 twin infants (174 healthy kidneys, 46 boys, 41 girls) (TIG). Birth lengths and weights were measured in 309 singleton infants (167 boys, 142 girls) (group B) and in TIG and compared. Birth lengths were analyzed by T-test, while birth weights by Mann-Whitney U test. The average, minimum and maximum values (5% and 95% CI) and standard deviations were calculated by statistical program SPSS 16.

Results:

4 different nomograms of kidney lengths in singletons and twins were presented according to the gender and side. Left and right kidneys were significantly longer in males than in females (p <0.05) between the 2nd-6th months of life, but not between 7th-12th months of life (p> 0.05). Left kidneys were significantly longer than right kidneys in both sexes in the first year of life (p<0.05). No significant difference in the kidney length existed between TIG and group A. Arithmetic mean birth length was 2 cm higher in males from group B than in TIG (t=6.4; p˂0,001), while it was 2.4 cm higher in females in group B than in TIG (t=6.4; p˂0,001). Median birth weight was 620 grams higher in males from group B than in TIG (z=6.9; p˂0,001), while it was 800 grams higher in females from group B than in TIG (z=7.3; p˂0,001).

Conclusions:

We present four nomograms of kidney size in the first year of life. Although the birth lengths and weights were significantly lower in twins than in singletons, kidney lengths were equal in both groups. Therefore, the same nomograms are useful for measurements of kidney length in both groups.