The normal range for hemoglobin is: 1  For men, 13.5 to 17.5 grams per deciliter. 2  For women, 12.0 to 15.5 grams per deciliter.he normal range for hemoglobin is: 1  For men, 13.5 to 17.5 grams per deciliter. 2  For women, 12.0 to 15.5 grams per deciliter.
Abnormal results mean there is an abnormality in the size, shape, color, or coating of the red blood cells (RBCs). Some abnormalities may be graded on a 4-point scale: 1+ means 25% of cells are affected.
1 Direct Coombs test. 2  A negative test result means that your blood does not have antibodies attached to your red blood cells. 3  Indirect Coombs test. 4  A negative test result means that your blood is compatible with the blood you are to receive by transfusion.his is called a negative test result. 1  Direct Coombs test. 2  A negative test result means that your blood does not have antibodies attached to your red blood cells. 3  Indirect Coombs test. 4  A negative test result means that your blood is compatible with the blood you are to receive by transfusion.