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A member asked:
Hi how much can hemoglobin fluctuate in a day ? thank you?
2 doctors weighed in across 2 answers
If there is no acute bleeding, the fluctuation due to lab variation or fluid status change should be within (+/-) 0.2 gm/dL. Give example: the first Hb is 14 gm/dL and another check in the same day could be in the range of 13.8 to 14.2 gm/dL.
Answered 10/5/2022
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Hemoglobin can fluctuate with the state of hydration and posture without any blood loss. A variation of 1-2 g/dL could be due to these factors.
Answered 10/30/2022
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