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Doctor insights on: Hemoglobin And Hematocrit Normal Values

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What could cause low MCV and high RDW but normal MCH, hemoglobin, and hematocrit for over a year?

What could cause low MCV and high RDW but normal MCH, hemoglobin, and hematocrit for over a year?

How low?: Reference ranges are set so that several percent of healthy folks fall outside on either end. If your peripheral smear is unremarkable and the MCV above 70, I'd forget the whole thing. My RDW is always high from donating blood. There are some variants of thalassemia minor that will produce this and puzzle people over a lifetime, though MCH is usually lowish. ...Read more

Dr. Tipu Sultan
826 doctors shared insights

Hematocrit (Definition)

Of red blood cell number. Classically this was the "packed cell volume." blood was placed in a microtube and spun in a centrifuge. The rbcs settle to the bottom and one measures the height in the tube and reported as a percentage. Now determined by an automated machine. A typical hct is about 3 ...Read more


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Why is my hemoglobin and hematocrit in normal range, but my ferritin dropping?

Why is my hemoglobin and hematocrit in normal range, but my ferritin dropping?

Some ideas: If you are losing blood (monthly loss, loss from illness) or are a non-supplementing vegetarian, you'll lose the iron you need to make red cells before you become anemic. Serum ferritin fluctuates but if yours is low, it needs to be evaluated. ...Read more

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What could cause low MCV and high RDW but normal MCH, hemoglobin, and hematocrit for over a year?

How low?: Reference ranges are set so that several percent of healthy folks fall outside on either end. If your peripheral smear is unremarkable and the MCV above 70, I'd forget the whole thing. My RDW is always high from donating blood. There are some variants of thalassemia minor that will produce this and puzzle people over a lifetime, though MCH is usually lowish. ...Read more

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How could I have a low red blood count (rbc) but a normal hemoglobin and hematocrit?

How could I have a low red blood count (rbc) but a normal hemoglobin and hematocrit?

How low?: An increase in red cell size, macrocytosis, may account for the disparity. Alcohol and low thyroid function may cause macrocytosis with near normal hemoglobin. ...Read more

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I was wondering how i could have a low red blood count (rbc) but a normal hemoglobin and hematocrit?

No!: They all go together unless you have very small sized red cells in which case you can be anemic but the red blood cell count may still be normal... As in a conditiona called thalasemia. ...Read more

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Can patient with Polycythemia vera have normal hemoglobin and hematocrit count but abnormal JAK2 result ? what is definitive test for PV ?

Can patient with Polycythemia vera have normal hemoglobin and   hematocrit count but abnormal JAK2 result ? what is definitive test for PV ?

See below: There is more than one factor that needs to be taken into consideration. High hemoglobin, low erthyropoietin and JACK 2 all need to be looked at. You may consult this site for more information on this topic. http://www.mayoclinic.org/diseases-conditions/polycythemia-vera/basics/definition/con-20031013 ...Read more