M Husband Has A Tube Through His Left Kidney The

m husband has a tube through his left kidney the urine is clear he also urinates natrualy through his penis for the right kidney he has had an abcess or hematoma on his retroperitenell was pressing on left he almost died 3 times but has been doing good the left one is at 17% but we re going to keep it as long as possible we saw his urologist mon but since hes passing some small clots of blood bright red today an yesterday what could this be an is it an emergency or can we be safe to wait an call his dr in the morning the last time he urinated there was just a speck of blood