A 35-year-old member asked:
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how low can hemoglobin go before you need a transfusion?

1 doctor answer
Dr. Michael Taylor
A Verified Doctor answered
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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.
Answered on Oct 19, 2018
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1 comment
Dr. Barry Rosen
Dr. Barry Rosen commented
33 years experience General Surgery
...and one unit at a time unless life-threatening bleeding is occurring.
Apr 29, 2012

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