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A 35-year-old member asked:

How low can hemoglobin go before you need a transfusion?

1 doctor answer4 doctors weighed in
Dr. Michael Taylor
A Verified Doctoranswered
23 years experience
It depends...: What's the cause? How quickly has the hemoglobin dropped/is there any ongoing bleeding? Is there evidence of inadequate tissue perfusion? What other acute & chronic medical problems does the patient have? In critically ill patients who aren't bleeding, a hemoglobin as low as 7 g/dl is generally well tolerated. Decision to transfuse should be based on desired physiologic effect, not on a number.
Dr. Barry Rosen
Dr. Barry Rosen commented
General Surgery 35 years experience
...and one unit at a time unless life-threatening bleeding is occurring.
Apr 29, 2012
Last updated Oct 19, 2018
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