вот размеры камней при колике: в обоих случаях от 2 мм или более - песок наверное 1 мм или меньше
The mean stone size was 5.2 ± 2.1 mm, and those with signs of hydronephrosis on their CT (n = 66) were 5.4 ± 2.3 mm,
while those with no signs of hydronephrosis (n = 57) were 4.9 ± 1.7.
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