There is +2 blood showing in my urine but under microscope its showing neg w or r cell?

Question

my urine report showing +2 accult blood but when they sees under microscope its not showing any wbc or rbc in urine can please someone explain me hhy?

Answer 1

If there are no blood cells, it is not blood in your urine.

Answer 2

There are three conditions where a test strip would show up positive for "blood" in urine:

1. hematouria (red blood cells in urine)

2. hemoglobinuria (lysed rbc, hemoglobin in urine)

3. myoglobinuria (lysed muscle myoglobin in urine)

Microscopic examination neg for r or w cell only rules out the first condition. Also did you centrifuge the urine sample? Rbc concentration may simply be too low to be counted by microscope.