Let's find out about 'free calcium' in your blood? (Ionized Calcium)

What do you know about the calcium in your body? We all know that bones and teeth need calcium. But did you know that there is a type of calcium in the blood that is a little special. Today we are going to talk about that type called 'ionized calcium ' . This plays a very important role in our body. Let's see what it is, why it is important, and what happens if it is too low or too high.

What is 'ionized calcium'?

Simply put, some of the calcium in your blood is floating around without being bound to any protein . That free, active calcium is what we call 'ionized calcium' or 'free calcium.' Imagine, this is the 'active' calcium that actually works in our bodies. About half, or about 50%, of the total calcium in your blood is ionized calcium.

What happens to the other part of the calcium? It is bound to proteins in the blood, especially to a protein called ' Albumin ' . We call it 'bound calcium' . This bound calcium doesn't do much work, it's just 'inactive', meaning it's inactive. That's why it's the free, ionized calcium that's used directly for our body's functions.

Now look, 99% of the total calcium supply in our body is in our bones and teeth . We all know that. The remaining 1% is circulating in the blood . So, this ionized calcium (free calcium) that we are talking about is actually a small amount, about 0.5% of the total calcium in the body. You may think, 'Wow, that's such a small amount.' But, like a chili pepper , this ionized calcium is essential for our overall health. Do you know what?

This ionized calcium is our:

• Helps the nervous system function properly. This is very important for carrying messages around.
• It helps muscles contract, meaning they contract and lengthen, and work properly.
• Supports healthy heart function and heart rhythm .
• It is also essential for the blood-clotting process. This is essential to stop bleeding when there is a wound.

Think about how important these things are. So if the amount of ionized calcium in the blood is too high or too low, it can indicate that there is some health problem inside the body. That's why it's important to be aware of this.

Why is this 'Ionized Calcium' test done?

Usually when we check calcium in the blood, doctors look at the total calcium, which is the amount of both bound calcium and free calcium. But sometimes, you want to know exactly how much free, active calcium you have. That's when this 'ionized calcium' test is done . It only measures the amount of free, active calcium.

To do this test, a small blood sample will be taken from you. That's it.

Now let's see in what situations a doctor might request an ionized calcium test:

• If your blood protein levels (especially albumin) are abnormal . Because when albumin increases or decreases, the total calcium level can change, but the ionized calcium level is the only way to understand the true situation.
• If you are significantly ill and need to be given IV fluids (fluids like saline given into the arm) . This is important to check the body's balance in cases of serious illness.
• If you are going to undergo major surgery , it is important to monitor this level before and after surgery.
• If you have had blood transfusions , some substances in the donated blood can cause changes in calcium levels.
• If you are pregnant and need neonatal monitoring .
• If you have symptoms of acute pancreatitis . Calcium levels are affected by pancreatic problems.
• If you suspect you have a parathyroid disorder , these glands produce hormones that control calcium.

How to prepare for the test?

There is a little preparation you need to do before going for this ionized calcium test.

• You are usually asked not to eat or drink anything for about six (6) hours before the test . It is okay to drink a little water. This is because the amount of substances in the blood can change slightly depending on the food we eat, making it difficult to get an accurate reading.
• Also, you should tell your doctor about all the medications, vitamins, and supplements you are taking . Some medications can affect the results of this test. If so, your doctor may ask you to stop taking them for a few days before the test. But remember, never stop taking any medications without your doctor's advice.

What does the ionized calcium level mean?

By looking at your ionized calcium level, your doctor can tell you a lot about your health. For example, it can help diagnose conditions like pancreatitis, kidney disease, and parathyroid gland conditions .

Having your ionized calcium levels within the proper range means that your body is functioning properly with calcium.

Here are the normal ranges for ionized calcium (these values ​​may vary slightly from lab to lab, so check the normal range on your report):

• Newborn: 4.8 – 5.5 mg/dL (milligrams per deciliter)
• For children: 4.8 – 5.3 mg/dL
• Adults: 4.6 – 5.3 mg/dL

What happens if ionized calcium decreases? (Hypocalcemia)

If your blood ionized calcium level is low, we medically call it 'hypocalcemia' . This could mean that you have a health problem.

What are the reasons for the decrease?

There are several main reasons why ionized calcium levels may decrease:

• Hypoparathyroidism: This means that your parathyroid glands do not produce enough parathyroid hormone (PTH), a hormone that controls calcium levels in the blood.
• Pancreatitis: Painful inflammation of the pancreas.
• Malabsorption: The body does not properly absorb calcium from the foods you eat.
• Rickets: A disease in which the bones of children become soft, mainly caused by vitamin D deficiency.
• Kidney failure: When the kidneys stop working properly, calcium regulation becomes disrupted.
• Vitamin D deficiency: Vitamin D is essential for the body to absorb calcium. If you don't have enough of it, your calcium levels may drop.

What are the symptoms of low calcium levels?

When ionized calcium levels are low (Hypocalcemia), various symptoms can occur. Not everyone will experience all of these symptoms, and some people may experience one or two.

• Muscle twitching or cramping (Muscle cramps).
• Confusion.
• Memory loss.
• Weak, brittle nails.
• Numbness and tingling in the limbs.
• Depression.

If you have symptoms like these, it is best to see a doctor for advice.

How is this condition treated?

If your ionized calcium level is low, your doctor will determine the cause and prescribe treatment accordingly. Here are some common treatments:

• Calcium supplements: Calcium is given in pill or liquid form.
• Vitamin D supplements: Help the body absorb calcium.
• Calcium gluconate injection: If calcium levels are very low, this injection is given to quickly increase them.
• Parathyroid hormone (PTH) replacement: This treatment can be given if you have hypoparathyroidism.

Along with this treatment, it is essential to treat the underlying medical condition that caused the calcium deficiency.

What happens if ionized calcium increases? (Hypercalcemia)

When the level of ionized calcium in the blood becomes too high, we call it 'hypercalcemia.' This is also a condition that can be caused by certain health problems.

What are the reasons for the increase?

There are several reasons why ionized calcium can increase:

• Hyperthyroidism: Overactive thyroid gland.
• Hyperparathyroidism: Excessive production of parathyroid hormone (PTH) by the parathyroid glands. This is the main cause of hypercalcemia.
• Paget's disease of the bone: A disease in which bone tissue breaks down and regrows excessively.
• Thrombocytosis: An increase in the number of platelets in the blood.
• Sarcoidosis: A condition in which small lumps called granulomas form in various parts of the body.
• Multiple Myeloma: A rare type of blood cancer.

What are the symptoms of high calcium levels?

When ionized calcium levels increase (Hypercalcemia), various symptoms can occur:

• Frequent urination.
• Muscle aches or cramps.
• Nausea and vomiting.
• Headaches.
• Fatigue.
• Bone pain.
• Constipation.
• Memory loss.
• Depression.
• Loss of appetite.

Important: Very high calcium levels can sometimes be a medical emergency, so be aware of these symptoms.

How do you fix this?

Treatment for elevated ionized calcium depends on the cause. There are several treatment options:

• Calcimimetics: These medications help control overactive parathyroid glands.
• Calcitonin supplements: Helps control calcium levels in the blood.
• Bisphosphonates: These are medications used to treat osteoporosis (thinning of the bones). They are also used to reduce hypercalcemia caused by cancer.
• Denosumab: This is used for people who do not respond to bisphosphonates.
• Prednisone: This steroid is given if hypercalcemia is caused by increased vitamin D levels.
• IV fluids (intravenous saline): This treatment is given in an emergency if the hypercalcemia is severe.
• Parathyroidectomy: Surgical removal of affected tissue from the parathyroid glands.

In addition, the doctor will also prescribe treatment for the underlying disease that caused your condition.

Finally, what to know

You probably understand now how essential this ionized calcium is to our health. Whether it is too much or too little in the blood, our body cannot function properly.

An ionized calcium test alone cannot tell you exactly what disease you have. However, it gives your doctor a lot of valuable information about your health. Using that information, he can give you an accurate diagnosis and start the necessary treatment.

So, if you have any questions or doubts about this, don't be shy and talk to your doctor . He will explain everything to you. Stay healthy!

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