How did you come to the conclusion that a baby is retaining urine in the kidney? The kidney is where the urine is produced; if it is being retained there, perhaps there is some type of blockadge - but this sounds like something a doctor should take care of, if it is a true diagnosis.
it means you are peeing blood
Brown urine means that your urine is concentrated and you need to be hydrated. After blood transfusion, there should be more urine produced because there is enough blood in the circulation.
There is a problem with the kidneys as there should be no blood in the urine.
no
If someone has blood in their urine this does not necessarily mean that there is an infection. This might mean that they have damaged their urethra somehow. Either way, a doctor should be notified.
A trace is a small amount
How many weeks you got? Babies don't excrete that much urine.
Kidney problems maybe
Pus in the urine, or pyuria, refers to the presence of white blood cells in the urine.
Do you mean blood clots in urine or thrombi in the blood vessels?
Leukocytes is infection. Urobilinogen is blood in the urine. It sounds like you was performing a test for a urine infection. If either of these 2 are positive then you have a UTI or possible Kidney infection if blood is found in urine.
White blood cells are usually not found in the urine due to the kidney. When there are white blood cells in the urine this if due to an infection. The kidney becomes inflamed and this allows the passing of white blood cells.