Health Library

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  • Sodium (Na) in Blood Test

    A sodium test checks how much sodium is in the blood. Sodium is both an electrolyte and mineral. It helps keep the water (the amount of fluid inside and outside the body's cells) and electrolyte balance of the body. Sodium is also important in how nerves and muscles work. Most...

  • Tuberculin Skin Test

    A tuberculin skin test (also called a Mantoux tuberculin test) is done to see if you have ever been exposed to tuberculosis (TB). The test is done by putting a small amount of TB protein ( antigens) under the top layer of skin on your inner forearm. If you have...

  • Fallopian Tube Procedures for Infertility

    A fallopian tube blockage often prevents successful passage of the egg to the sperm, or the fertilized egg to the uterus. Surgery can be used to try to correct this common cause of infertility. What type of surgery you have depends on where and how much the fallopian tube is...

  • Infertility

    Looks at infertility. Includes info on various tests used to find out why someone can't get pregnant. Covers treatments, including medicine to help stimulate ovulation and procedures to increase sperm count.

  • Throat Culture

    Discusses test used to find cause of a sore throat. Covers conditions caused by fungal or bacterial infection. Covers how test is done. Looks at what results might mean.

  • Cardiac Catheterization

    Discusses test used to check your heart and coronary arteries. Covers reasons cardiac catheterization is done. Looks at how to prepare. Explains how the test is done in the cardiac catheterization laboratory (cath lab) by a cardiologist. Covers risks.

  • Types of Kidney Stones

    The four main types of kidney stones are: Calcium stones. Most kidney stones are made of calcium compounds. Conditions that cause high calcium levels in the body, such as hyperparathyroidism, increase the risk of calcium stones. Uric acid stones. Some kidney stones are made of uric acid, a waste product...

  • Shock Wave Lithotripsy

    Discusses shock wave lithotripsy, a procedure that uses shock waves to break a kidney stone into smaller pieces. Covers how it is done and what to expect after treatment. Covers risks.

  • HELLP Syndrome and Preeclampsia

    HELLP syndrome is a life-threatening liver disorder thought to be a type of severe preeclampsia. It is characterized by H emolysis (destruction of red blood cells), E levated L iver enzymes (which indicate liver damage), and L ow P latelet count. HELLP is usually related to preeclampsia. About 10% to...

  • Brandt-Daroff Exercise for Vertigo

    The Brandt-Daroff exercise is one of several exercises that can speed up the compensation process and end the symptoms of vertigo. It often is prescribed for people who have benign paroxysmal positional vertigo (BPPV) and sometimes for labyrinthitis. These exercises won't cure these conditions. But over time they can...

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