If your doctor suspects that you may have an infection or an illness that needs to be confirmed through blood work, she may send you to the lab for a Complete Blood Count (CBC). According to questdiagnostics.com the (CBC) test will determine the levels of different types of blood cells in your body such as, platelets, red blood cells, white blood cells, hematocrit and haemoglobin (Hgb).
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What is Hemoglobin?
Haemoglobin is the protein that is responsible for supplying your blood cells with oxygen. Although the values are different depending on the type of blood cell, the haemoglobin value for a healthy adult is set between twelve and eighteen grams per one hundred millilitres of blood.
How is Blood Drawn for the Hgb Blood Test?
The blood that is needed to perform the Hgb blood test is taken by needle through one of your veins. Although, the vein of the inner arm is the common site for blood to be drawn, if the veins in the hand are more pronounced the blood can be drawn from there.
What Does a Hgb Blood Test Determine?
High Hgb Results
A blood test that reflects a high Hgb result may indicate that your kidneys are not functioning as they should be. According to mayoclinic.com, your kidneys may be eliminating too much protein, or that your bone marrow is overproducing red blood cells. High Hgb may also denote dehydration or possibly a lung disorder.
Low Hgb Results
Low Hgb results may signify anaemia, cirrhosis of the liver, and excessive bleeding. According to Anemia.org, severe anaemia is present with an Hgb of under 8.0, and can be life threatening. A low Hgb reading can also represent low iron, vitamin B12 and folate. Another form of anaemia known as aplastic anaemia may also play a role in low Hgb results, which means that the bone marrow is not producing enough red blood cells.
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