hi there, with a Hb level of 5gm% your mother did need a blood transfusion
and so that is fine but passing reddish brown urine is not fine and could signify a incompatible blood transfusion reaction. You need to get her urine checked for Hb or RBC
in it. Do consult your attending doctor and get a direct and indirect coomb's test done on her blood to see that she is not having a delayed transfusion reaction. This condition requires intervertion and investigation. Take care.