- False Pos: 
- Anticoagulation 
- Myoglobinuria 
- Bleeding diathesis 
- Hemoglobinuria 
- Entero-vesical fistula 
- Porphyria 
- HbS 
- GU neoplasm 
- Vigorous Exercise 
- Polycystic kidney 
- Renal Infarction 
- Trauma 
- Renal Vein Thrombosis 
- Infection 
- Transfusion RXN 
- Stones 
- Burns; 
- Prostatic hypertophy 
- Intersitial Nephritis 
- Glomerulonephritis 
- Hemolytic Anemia 

- Discussion: 
- If DipStick is Positive for Blood, but no Cells: 
- Free Hemoglobin from Trauma 
- Transfusion RXN 
- Lysis of RBCs (RBC will Lyse if the pH is <5 or >8, 
- Myoglobin present because of a Crush Injury, Burn, Tissue Ischemia; 
- only 8.8 % of pts have more than 10 red cells per high-power field 

Haematuria after blunt trauma: the role of pyelography.

- Diff Dx: