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楼主: 郭国汀

[家庭] 鈣離子(離子鈣)之專業文章

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 楼主| 发表于 1/5/2015 04:24:12 | 显示全部楼层
What Does an Abnormal Ionized Calcium Test Result Mean?


Abnormal results can indicate kidney disease, problems with your parathyroid gland, vitamin and mineral deficiencies, certain kinds of cancer, and the effects of certain medications.


Low levels of ionized calcium in the blood can indicate:


hypoparathyroidism (underactive parathyroid gland副甲狀腺)
inherited resistance to parathyroid hormone
malabsorption of calcium
vitamin D deficiency
osteomalacia/rickets (softening of the bones, in many cases due to a vitamin D deficiency)
magnesium deficiency
high phosphorus levels
acute pancreatitis (inflammation of the pancreas胰)
kidney failure
malnutrition
alcoholism


High level of ionized calcium in the blood can indicate:


hyperparathyroidism (overactive parathyroid gland)
sedentary lifestyle (lack of mobility)
milk-alkali 鹼;強鹼syndrome (high levels of calcium and alkaline in the body due to excessive milk and antacid consumption over time)
multiple myeloma(cancer of the plasma cells in the bone marrow of the largebones of the body that will result in death if not treated:)(cancer of the plasma cells, a type of white blood cell that produces infection-fighting antibodies)
Paget’s disease (disorder that results in deformity due to abnormal bone destruction and growth)
sarcoidosis (inflammatory disease of unknown origin affecting the eyes, skin and other organs)
tuberculosis (potentially fatal disease caused by the bacterium Mycobacterium tuberculosis which normally attacks the lungs)
kidney transplant
taking thiazide diuretics
certain kinds of tumors
overdose of vitamin D

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 楼主| 发表于 1/5/2015 04:30:14 | 显示全部楼层
What Is an Ionized Calcium Test?


Calcium is an important mineral that is used in many ways in your body. It increases the strength of your bones and teeth and helps your muscles and nerves function. Total calcium in your blood is measured with a serum calcium blood test, but calcium is actually found in several different forms in your blood; these include free ionized calcium, calcium that is bound to other minerals (anions負離子,陰離子), and calcium that is bound to proteins like albumin. Ionized calcium is the most active form and is also called free calcium.

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 楼主| 发表于 1/5/2015 04:35:26 | 显示全部楼层
Why Is the Ionized Calcium Test Performed?
Typically, a serum calcium test is performed to check the total amount of calcium in your blood. This includes ionized calcium as well as all the calcium bound to proteins. If you have signs of kidney disease, certain kinds of cancers, or problems with your parathyroid gland, your doctor may want to check your blood calcium levels.

Ionized calcium levels give more information about active, ionized calcium. If you have abnormal levels of proteins, such as albumin, or immunoglobins in your blood, it may be important to know your ionized calcium levels. If the balance between bound calcium and free calcium is not normal, it’s important to determine why. Free and bound calcium each typically make up half of the body’s total calcium, and an imbalance can be a sign of a major health issue.

Patients receiving blood transfusions, critically ill patients on intravenous fluids, patients undergoing major surgery, and patients with abnormal levels of blood proteins may have their ionized calcium levels checked. In these patients, it is important to understand exactly how much free calcium is available.

Low levels of free ionized calcium can cause the heart to slow down or speed up, can cause muscle spasms, and can even result in coma. If you have any signs of numbness around your mouth or in your hands and feet, or experience muscle spasms in the same areas, an ionized calcium test may be ordered. These are symptoms of low free calcium levels.

This test is more difficult to perform than a serum calcium test due to the special handling required for the blood sample, so it is only done in certain circumstances.

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