Minimum amount of GI bleed to cause malena is
Melaena refers to the passage of typical black, tarry coloured foul smelling stool. It signifies upper GI bleed. At least 50-60 ml bleeding should be there to cause melaena. Reference : page 834 SRB's manual of surgery 5th edition
10 ml
40 ml
60 ml
115 ml
Urology