Current FDA guidelines require all volunteer blood donors have a hemoglobin of 12.5 g/dl or greater, or a hematocrit of 38% or greater prior to donation.
FDA guidelines require allogeneic blood donors to have a hemoglobin level or 12.5 g/dL or greater, or a hematocrit of 38% or greater. Autologous donors (self-donation) must have a hematocrit of at least 33%.
Reticulocytes would be released into the blood soon after a donation. They have 80% the amount of a regular RBC's hemoglobin, and within 24 hours in the blood stream they would become a mature RBC.
If your hemoglobin count is very low, it's important to address the underlying cause before considering blood donation. Most blood donation organizations require a minimum hemoglobin level, typically around 12.5 g/dL for women and 13.0 g/dL for men. You should consult with a healthcare provider to determine when it is safe for you to donate blood, which may be after your levels have returned to normal and any health issues have been resolved.
A hemoglobin level of 12.8 g/dL is within the normal range for adults. However, normal ranges can vary slightly depending on the laboratory and individual factors, so it's best to consult a healthcare provider for interpretation based on your specific health needs.
Anemia is a deficiency in the amount of hemoglobin in the blood.
A blood level of 13.6 typically refers to the concentration of hemoglobin in the blood, measured in grams per deciliter (g/dL). This value suggests that the individual has a normal or slightly elevated level of hemoglobin, which is essential for transporting oxygen throughout the body. Normal hemoglobin levels vary by age and sex, but a level of 13.6 is generally considered acceptable for many adults. However, specific interpretations should be made in the context of a person's overall health and medical history.
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By lowering the blood plasma level, the red blood cells are concentrated.
could indicate anemia
A hemoglobin level of 4.7 is dangerously low and if not properly treated could become fatal. Normally, women should have a hemoglobin level of 12 or more, men 13 or more. Generally, hospitals will begin emergency blood transfusions when the hemoglobin level drops below 7 or 8.
One unit of red blood cells typically raises the hemoglobin level by about 1 gram per deciliter.