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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Could Be Reason For Low RBC Counts Inspite Of Taking Strong Iron Supplement?

Hello Dr. Grief, My husband is 76 years old and has always been strong and healthy. He had open heart surgery 7 years ago that included a triple by-pass and a new aortic valve. He had an excellent recovery. Last year he was diagnosed with type 2 diabetes and he takes metformin and glyberide. His sugar levels are always good and very consistent. Three months ago his doctor noticed that his red blood count was low (120) and the level continued to fall down to 100. He has had an endoscopy, colonoscopy, echocardiogram, and a Trans Esophosegial Echocardiogram - all with excellent results. There is no physical sign of bleeding, yet his RBC remains low even though he is taking 3000 mg of iron daily. He is scheduled to see a haemotologist at the end of this month. Would your recommend other diagnostic tests that might solve this mystery? Thank you! Rosemary
Mon, 20 Jan 2014
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Internal Medicine Specialist 's  Response
hi, this is Dr Vaddadi. I suggest a workup for serum ferritin, TIBC and transferrin saturation. Those tests tell us whether iron stores are normal-low or high. some patients have normal to high iron stores but still may have low RBC counts like in anemia of chronic disease. I may also recommend serum B12 levels, as patients on metformin are known to develop B12 defeciency which is another cause of anemia. we may review after the results. Hope this helped.
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What Could Be Reason For Low RBC Counts Inspite Of Taking Strong Iron Supplement?

hi, this is Dr Vaddadi. I suggest a workup for serum ferritin, TIBC and transferrin saturation. Those tests tell us whether iron stores are normal-low or high. some patients have normal to high iron stores but still may have low RBC counts like in anemia of chronic disease. I may also recommend serum B12 levels, as patients on metformin are known to develop B12 defeciency which is another cause of anemia. we may review after the results. Hope this helped.