You've probably heard a doctor ask you to bring a blood report when you go to the doctor. Sometimes, when we see the values in such a report, we feel a little confused, don't we? Well, one of the important things in your blood is this reticulocyte . So, today, let's talk about this reticulocyte count in simple terms? Let's see what it says and why it's important.
What are reticulocytes? Why are they counted?
Simply put, reticulocytes are baby red blood cells . To be precise, these are the newest red blood cells that are formed in our bone marrow and added to the blood before they are fully mature.
Think about it, this bone marrow inside our bones is like a little factory . Its main job is to make the red blood cells that our body needs. These red blood cells are what carry oxygen throughout our body and give us the energy to live. So, doctors check this reticulocyte count to see if this factory is working properly and making enough new red blood cells.
Normally, a red blood cell lives for about 120 days. As old cells die, new cells need to be produced. Sometimes, our body needs more red blood cells than usual. For example, if we have anemia, or if we have lost a lot of blood from somewhere. At such times, our bone marrow factory starts working overtime , making a lot of new red blood cells, called reticulocytes, and releasing them into the blood.
So, this test called a reticulocyte count can help doctors determine whether your bone marrow is healthy and making red blood cells properly. It can also help diagnose certain blood-related diseases and see how effective their treatments are.
At what point does a doctor recommend doing this reticulocyte count test?
There are several reasons why a doctor might ask you to have a reticulocyte count. The main ones are:
- If you suspect you have anemia: Anemia is a decrease in red blood cells in the blood. So, this test helps to find out what is causing it. It can tell you things like whether the bone marrow is not making enough red blood cells, or whether the cells that are being made are being destroyed too quickly.
- Check if your bone marrow is working properly: This test is important to make sure that the bone marrow is producing enough new red blood cells.
- If you are taking medication for a blood disorder: For example, if you have been given chemotherapy (anti-cancer treatment) or have had a bone marrow transplant, this reticulocyte count may be done more frequently to see if your bone marrow is recovering and working properly.
What should the normal reticulocyte count be?
This is usually measured as a percentage of your total red blood cell count.
- For an adult: The normal reticulocyte count should be between 0.5% and 2.5% .
- Infants: This number is a bit high. Their average is between 2% and 6% .
However, it is important to remember that these values can vary slightly from lab to lab. Therefore, it is best to talk to your doctor to find out the exact values in your report.
How is this Reticulocyte Count test done?
This is very simple. You don't have to work hard.
A doctor or nurse will take a small sample of blood from a vein in your arm . The blood sample will then be sent to a lab for testing. At the lab, specialized technicians will put the blood sample into a special machine and count all the cells in your blood, including red blood cells, white blood cells, and platelets. This is where the reticulocyte count is measured.
What does an abnormal reticulocyte count mean?
Now, if your report says your reticulocyte count is either lower or higher than normal, shouldn't you suddenly fear a serious illness?
This is like giving a little hint. It only means that you may have a condition related to your blood. This test alone is not enough to say for sure that it is a disease.
This reticulocyte count is just one tool that helps doctors figure out your health. Your doctor will compare the values in your report with your other symptoms, and your overall health, and explain to you exactly what is going on. Therefore, it is important to talk to your doctor about this.
In what conditions can the reticulocyte count decrease?
A lower than normal reticulocyte count can simply mean that your bone marrow is not making enough new red blood cells . There are several conditions that can cause this. Let's look at a few of them:
Hypoproliferative Anemias
This refers to anemia, which occurs due to a decrease in the production of red blood cells by the bone marrow.
- Chronic disease anemia: This is the most common type of anemia. This anemia can occur if you have a long-term condition, such as diabetes mellitus, heart disease, lung disease, rheumatoid arthritis, long-term infections, or cancer.
- Nutritional anemias: If our body does not get enough of certain nutrients and vitamins, the bone marrow cannot produce red blood cells normally. Examples of this are:
- Iron-deficiency anemia
- Pernicious anemia / Vitamin B12 anemia
- Folate deficiency anemia
- Aplastic anemia: This is a rare condition. This is when your bone marrow doesn't have enough stem cells, so it can't make enough blood cells (not just red cells, but white cells, and even platelets).
Other situations:
- Myelodysplastic syndrome: This is actually a type of cancer. In this disease, the stem cells in the bone marrow do not mature properly and become healthy red blood cells. The cells that are produced are abnormal and do not function properly.
- Megaloblastic anemia: This type of anemia is mainly caused by a deficiency of vitamins such as vitamin B12 or folic acid. It can also be caused by certain medications and other diseases that affect the bone marrow. Here, too, the bone marrow is unable to produce normal, healthy red blood cells. The cells that are produced are larger than normal.
In what situations can the reticulocyte count increase?
An elevated reticulocyte count means that your bone marrow is making new red blood cells faster than normal . There are two main reasons for this:
- Hemolytic anemia: This is when your red blood cells don't live their normal lifespan (about 120 days) and are destroyed before that. When they are destroyed, the bone marrow works hard to make up for the loss by making more reticulocytes (new red cells) and adding them to the blood. That's why the reticulocyte count increases.
- Blood loss: If you suddenly lose a lot of blood (for example, from an accident), or if you continue to lose blood gradually (for example, from a stomach wound), the bone marrow will start to make more reticulocytes to compensate for the loss. This can also cause the reticulocyte count to increase.
Also, sometimes, when treating anemia (for example, when giving iron pills), if the bone marrow is responding well, meaning it's starting to make new red cells, the reticulocyte count can temporarily increase. That's a good sign.
What are the important questions to ask the doctor?
When your doctor orders a reticulocyte count, you may want to know more about it. Don't be afraid to ask questions like these:
- "Why is the doctor asking me to do this test?"
- "When will I get the report for this test?"
- "Will I need to have more blood tests based on this report?"
- "If my reticulocyte count is not normal, what could be the reason?"
- "What do we do next?"
Asking questions like these can help you gain a better understanding of your situation.
Final Take-Home Message
The reticulocyte count is an important test to see how well your bone marrow is making red blood cells. This number on your report may be higher or lower than normal.
But remember, this is just one test. It alone cannot determine whether you have a serious illness. If the values in your report are abnormal, it is normal to feel worried and scared.
But, the best thing to do is to talk openly about this with your doctor. He or she can explain exactly what is in your report and, if necessary, guide you on what to do next. When you have a good understanding of your situation, you will be able to avoid unnecessary fear and anxiety.
` Reticulocyte, blood tests, anemia, bone marrow, red blood cells, diagnosis, health
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