Presence of excess hemoglobin in plasma. Normally hemoglobin is located within the red blood cells. When there is increased hemolysis, hemoglobin is rapidly released into the plasma resulting in hemoglobinemia.

1. AIIMS November 2011 – MCQ 198
2. Hemolysis
3. AIIMS November 2011 – MCQ 73
4. Positive free water clearance