Q. Immediately after an acute episode of blood loss – following a motor vehicle accident, for example – the hemoglobin level is normal. Why is that? Are the other red cell indices normal too?
A. Immediately after acute blood loss, all the laboratory red cell indices are normal! The hemoglobin, RDW, RBC, MCH, and the MCHC are all normal. Because really, although the patient has lost blood (and therefore is in trouble because he/she has fewer red cells to transport oxygen through the body), the blood that’s examined in the laboratory appears totally normal! It has the same number of red cells per unit volume, and the red cells themselves are perfectly normal (assuming the patient’s blood was normal to begin with). This is because during acute blood loss, you’re losing red cells but also the plasma that goes along with them. So the blood remaining in the patient is totally normal – it’s just that there isn’t enough of it.
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- muhindo bivarton said good work, thank u
- Dr. Nehal rana said Well explained. . Awesome explanation. I thought dat why ans is D not E initially. .
- Deb said Appreciate the information so much!
- Tracey said Excellent explanation, thank you!
- Kristine said Oh. Good question. Sometimes the word “pseudopalisading” is used when there is necrosis...
- Ujwal said What do we meant by pseudopalisading? I got confused by above answer of palisading with example of n...
- Doaa said Great learning site. I hope that you strongly focus on macro and micro photos for illustration. Than...
- Ujwal said Thank You so much for the informations. Really glad.
- Liz said Great site & even more excited to see that you’re local!
- Leandro Zuniga said Nices and helpful explanation, thanks a lot.
- Kristine said Good question! Polarity refers to the orientation of cells. For example, epithelial cells in glands...
- m.hamdy said thanks very much, i want to know the difference between polarity and palisading