How many hemoglobin increase during transfusion of 450ml whole blood?

The amount of hemoglobin increase during transfusion of 450ml whole blood depends on several factors, such as the hemoglobin concentration of the donor's blood and the recipient's blood volume. On average, a 450ml whole blood transfusion can increase hemoglobin levels by approximately 1 gram per deciliter (g/dL) in an average-sized adult.

To determine the exact hemoglobin increase, it is necessary to consider the specific hemoglobin concentration of the donor's blood, which can vary between 12 and 16 g/dL. The recipient's blood volume also plays a role, as a smaller blood volume will result in a more significant hemoglobin increase compared to a larger blood volume.

For example, if the donor's blood has a hemoglobin concentration of 14 g/dL and the recipient has an average blood volume of 5 liters, a 450ml whole blood transfusion can increase hemoglobin levels by approximately 0.96 g/dL. This calculation is based on the following formula:

Hemoglobin increase = (Donor's hemoglobin concentration × Volume of transfused blood) / Recipient's blood volume

In this case, the hemoglobin increase would be calculated as follows:

Hemoglobin increase = (14 g/dL × 450 ml) / 5000 ml

= (6300 g/dL) / 5000 ml

= 1.26 g/dL

Therefore, a 450ml whole blood transfusion with a donor's hemoglobin concentration of 14 g/dL can increase hemoglobin levels by approximately 1.26 g/dL in an average-sized adult with a blood volume of 5 liters.