How is the hematocrit percentage calculated?

Article by: Mr. Mario Ceja | Last update: April 10, 2022
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The hematocrit is a ratio between the volume of erythrocytes and the volume of blood, and is expressed as a fraction or percentage. For example, a hematocrit of 40% means that there are 40 milliliters of red blood cells in 100 milliliters of blood.

How is the hematocrit value calculated?

Hematocrit (PCV, Packed Cell Volume) can be determined by centrifugation of heparinized blood in a capillary tube (also known as a microhematocrit tube) at 10,000 rpm for 5 minutes. This separates the blood into layers.

What is percentage hematocrit?

It is a blood test that measures the amount of a person’s blood that is made up of red blood cells.

What is hematocrit 38%?

The value is expressed as a percentage of red blood cells in a volume of blood. For example, a hematocrit of 38 means that 38% of your blood volume is made up of red blood cells. Hematocrit and hemoglobin values ​​are the two main tests that indicate anemia or polycythemia.

What is hematocrit and how is it measured?

A hematocrit test measures the proportion of red blood cells in the blood. Red blood cells carry oxygen throughout the body. Having too many or too few red blood cells can be a symptom of certain diseases.

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What are normal hematocrit values?

The hematocrit reference values ​​vary from laboratory, but generally the normal hematocrit value is:

    Woman: 35 to 45%. … Men: 40 to 50%; Children from 1 year to 18 years: between 37 and 44%, according to age.

What happens when the hematocrit is low?

If the results show that your hematocrit levels are too low, it could indicate: Anemia. Nutritional deficiency of iron, vitamin B-12, or folate. Kidney diseases.

What hematocrit value is considered anemia?

In general, anemia is considered the presence of hemoglobin values ​​below 12 g/dl with hematocrit below 36% for women and 14 g/dl with hematocrit below 41% for men.

What does a hematocrit of 35 mean?

– Hematocrit: in women it is normal to have it between 36-46%, so its value can be considered practically normal. The hematocrit is the percentage of erythrocytes (red blood cells) in the total volume of blood. It is usually an important parameter, especially to look for dopping in athletes.

What to do if I have a high hematocrit?

To lower the hematocrit it is best to drink water or juices without sugar. Take aspirin a couple of times a month. Aspirin helps thin the blood and prevents clots from forming. When we have a high hematocrit level, the blood becomes thicker, so aspirin will help prevent this.

How is the hematocrit calculated after centrifuging the blood?


When the sample is centrifuged, the erythrocytes remain at the bottom of the tube, the plasma remains at the top, and the leukocytes remain at the interface. The ratio of the volume of formed elements to the volume of total blood is the hematocrit.

How to know in a blood count if I have anemia?

The diagnostic criteria for anemia is

In men: hemoglobin < 14 g/dL (140 g/L), hematocrit < 42% (< 0.42), or red blood cells < 4.5 million/mcL (< 4.5 × 10 12/L)For women: hemoglobin < 12 g/dL (120 g/L), hematocrit < 37% (< 0.37), or erythrocytes < 4 million/mcL (< 4 × 10 12/L)

When is anemia considered serious?

When anemia is due to significant bleeding, the blood loss, if not stopped in time, can lead to death.

How to know if there is anemia in the blood results?

The hemoglobin test is commonly used to detect anemia, an abnormally low level of red blood cells in the body. When a person has anemia, the cells in their body don’t get the oxygen they need. Hemoglobin tests are measured as part of a complete blood count.

How to increase hematocrit levels?

A diet rich in iron will help you naturally increase hematocrit levels, increase energy and avoid the dreaded anemia. To do this, you must include vegetables such as spinach or chard, seafood and red meats such as veal in your diet.

What does low hemoglobin and hematocrit mean?

A low level of red blood cells, hemoglobin, or hematocrit is a sign of anemia, which can result from: Blood loss (either sudden or due to problems such as heavy periods over a long time) Bone marrow failure (for example, from radiation, infection, or tumor)

What level of hemoglobin is dangerous?

A normal hemoglobin level is 11 to 18 grams per deciliter (g/dL), depending on your age and gender, but 7 to 8 g/dL is a safe level. Your doctor will need to use just enough blood to reach this level. Often one unit of blood is enough.

How can I know what type of anemia I have?

The different types of anemia include: Vitamin B12 deficiency anemia. Folate (folic acid) deficiency anemia Iron deficiency anemia.

How to lower red blood cells naturally?

How to lower hemoglobin

Avoid consuming multivitamins rich in iron. Monitor the consumption of foods that contain high levels of iron, such as red meat and iron-fortified cereals or grains. Avoid cooking in iron pans. Monitor the level of iron in the water.

When does the hematocrit increase?

As a general rule, the hematocrit increases when the number of red blood cells increases, and conversely decreases when there is a failure in the production of erythrocytes by the bone marrow, when the destruction of red blood cells increases or when blood loss occurs.

What does it mean to have a hematocrit of 34?

Generally, if the hematocrit values ​​are too low, it can indicate the presence of anemia, which can be associated with different causes: from a problem with your diet, digestive bleeding, or other hematological pathologies, in which bone marrow dysfunction causes a shortage of red blood cells…

What should I eat if I have high red blood cells?

Broadly speaking, you should include in your daily diet:

    Fruits and vegetables, at least 5 servings a day. Pasta, potatoes, rice: 2 to 3 servings a day, depending on your physical activity. Eggs, lean or white meat, fish, legumes or nuts: between 1 and 3 servings per day.

What plant is used to lower hemoglobin?

Medicinal plants to treat anemia

Nettle infusion. Nettle is the most recommended in these cases. … Dandelion infusion. Dandelion is a plant well known for raising the level of iron in the blood. … Alfalfa infusion. … Horsetail infusion. … Sage infusion.

What drug kills red blood cells?


    Cephalosporins (a type of antibiotics), the most common.Dapsone.Levodopa.Levofloxacin.Methyldopa.Nitrofurantoin.Some non-steroidal anti-inflammatory drugs (NSAIDs)Penicillins and their derivatives.

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