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Health Information Encyclopedia 17-hydroxycorticosteroids 12/11/2011
17-OH corticosteroids; 17-OHCS How the test is performed: A 24-hour urine sample is needed. On day 1, urinate into the toilet when you get up in the morning. Collect all urine in a special container for the next 24 hours.
Health Information Encyclopedia 17-ketosteroids 11/17/2011
17-ketosteroids are substances that form when the body breaks down male steroid sex hormones called androgens and other hormones released by the adrenal glands in males and females and in the testes in males. This article discusses the laboratory test used to measure the amount of 17-ketosteroids in a urine sample. How the test is performed: A 24-hour urine sample is needed. On day 1, urinate into the toilet when you get up in the morning. Afterwards, collect all urine in a special container for the next 24 hours.
Health Information Encyclopedia 17-OH progesterone 05/31/2011
17-hydroxyprogesterone; Progesterone - 17-OH How the test is performed: A blood sample is needed. For information on how this is done, see: Venipuncture . The blood sample is sent to a laboratory for examination. How to prepare for the test: Your doctor may tell you to stop taking any drugs that may cause false test results.
Health Information Encyclopedia 24-hour urinary aldosterone excretion test 09/01/2013
Aldosterone - urine How the test is performed: A 24-hour urine sample is needed. You will need to collect your urine over 24 hours . Your health care provider will tell you how to do this. Follow instructions exactly. This ensures accurate results.
Health Information Encyclopedia 24-hour urine copper test 01/04/2013
Quantitative urinary copper How the test is performed: A 24-hour urine sample is needed. On day 1, urinate into the toilet when you get up in the morning. Afterwards, collect all urine in a special container for the next 24 hours. On day 2, urinate into the container when you get up in the morning. Cap the container. Keep it in the refrigerator or a cool place during the collection period.
Health Information Encyclopedia 24-hour urine protein 09/03/2012
Urine protein - 24 hour How the test is performed: A 24-hour urine sample is needed. On day 1, urinate into the toilet when you get up in the morning. Afterwards, collect all urine in a special container for the next 24 hours. On day 2, urinate into the container when you get up in the morning.
Health Information Encyclopedia 25-hydroxy vitamin D test 07/19/2012
25-OH vitamin D test; Calcidiol; 25-hydroxycholecalciferol test How the test is performed: A blood sample is needed.
Health Information Encyclopedia 5'-nucleotidase 03/11/2013
5'-NT How the Test is Performed: Blood is drawn from a vein, usually from the inside of the elbow or the back of the hand. The site is cleaned with germ-killing medicine (antiseptic). The health care provider wraps an elastic band around the upper arm to apply pressure to the area and make the vein swell with blood.
Health Information Encyclopedia 5-HIAA 09/09/2012
HIAA; 5-hydroxyindole acetic acid; Serotonin metabolite How the test is performed: A 24-hour urine sample is needed. On day 1, urinate into the toilet when you get up in the morning. Afterwards, collect all urine in a special container for the next 24 hours.
Health Information Encyclopedia Abdominal CT scan 11/09/2012
Computed tomography scan - abdomen; CT scan - abdomen; CAT scan - abdomen How the test is performed: You will lie on a narrow table that slides into the center of the CT scanner. Most often, you will lie on your back with your arms raised above the head. Once you are inside the scanner, the machine's x-ray beam rotates around you.
Health Information Encyclopedia Abdominal MRI scan 11/09/2012
Nuclear magnetic resonance - abdomen; NMR - abdomen; Magnetic resonance imaging - abdomen; MRI of the abdomen How the test is performed: You may be asked to wear a hospital gown or clothing without metal zippers or snaps (such as sweatpants and a t-shirt).
Health Information Encyclopedia Abdominal tap 08/10/2012
Peritoneal tap; Paracentesis How the test is performed: This test may be done in an office setting, treatment room, or hospital. The puncture site will be cleaned and shaved, if necessary. You then receive a local numbing medicine. The tap needle is inserted 1 - 2 inches into the abdomen. Sometimes a small cut is made to help insert the needle.
Health Information Encyclopedia Abdominal ultrasound 11/09/2012
Ultrasound - abdomen; Abdominal sonogram How the test is performed: An ultrasound machine makes images of organs and structures inside the body.  The machine sends out high-frequency sound waves that reflect off body structures.
Health Information Encyclopedia Abdominal wall fat pad biopsy 02/02/2013
Abdominal wall biopsy; Biopsy - abdominal wall fat pad How the test is performed: Needle aspiration is the most common method of taking an abdominal wall fat pad biopsy . The health care provider cleans the skin on your belly area. Numbing medicine may be applied on the area.
Health Information Encyclopedia Abdominal x-ray 01/22/2013
Abdominal film; X-ray - abdomen; Flat plate; KUB x-ray How the test is performed: The test is done in a hospital radiology department. Or it may done in the health care provider's office by an x-ray technologist.
Health Information Encyclopedia Abscess scan - radioactive 11/09/2012
Radioactive abscess scan; Abscess scan How the test is performed: Blood is drawn from a vein, most often on the inside of the elbow or the back of the hand. The site is cleaned with germ-killing medicine (antiseptic). The health care provider wraps an elastic band around the upper arm to apply pressure to the area and make the vein swell with blood.
Health Information Encyclopedia ACE levels 11/17/2011
Serum angiotensin-converting enzyme; SACE How the test is performed: A blood sample is needed. For information on how this is done, see: Venipuncture How to prepare for the test: You may have to restrict food and fluids for up to 12 hours before the test. People taking steroid therapy should talk to their health care providers, because steroids can decrease ACE levels.
Health Information Encyclopedia Acetylcholine receptor antibody 04/30/2011
Acetylcholine receptor antibody is a protein found in the blood of most people with myasthenia gravis . The antibody affects a chemical that sends signals from nerves to muscles and between nerves in the brain. This article discusses the blood test for acetylcholine receptor antibody. How the test is performed: A blood sample is needed. For information on how this is done, see: Venipuncture How to prepare for the test: No special preparation is required.
Health Information Encyclopedia Acid loading test (pH) 12/19/2011
The acid loading test (pH) measures the ability of the kidneys to send acid to your urine when there is too much acid in your blood. See also: Urine pH How the test is performed: You will be told to take ammonium chloride capsules by mouth for 3 days. Then, a urine and blood sample are taken.  The laboratory measures the level of acid found in both samples. For information on how the urine and blood samples are obtained, see: Clean catch urine collection Venipuncture (blood draw) How to prepare for the test: Your doctor will tell you to take ammonium chloride capsules by mouth for 3 days prior to the test.
Health Information Encyclopedia Acid mucopolysaccharides 05/12/2011
AMP; Dermatan sulfate - urine; Urine heparan sulfate; Urine dermatan sulfate; Heparan sulfate - urine How the test is performed: A 24-hour urine sample is needed. On day 1, urinate into the toilet when you get up in the morning.
Health Information Encyclopedia Acid-fast stain 12/06/2011
The acid-fast stain is a laboratory test that determines if a sample of tissue, blood, or other body substance is infected with the bacteria that causes tuberculosis and other illnesses. How the test is performed: Your health care provider will collect a sample of blood, urine, stool, sputum, bone marrow, or tissue, depending on the location of the suspected infection. The sample is then sent to a laboratory, where a small amount is placed on a glass slide, stained, and heated.
Health Information Encyclopedia ACTH 12/11/2011
Serum adrenocorticotropic hormone; Adrenocorticotropic hormone; Highly-sensitive ACTH How the test is performed: A blood sample is needed. For information on how this is done, see: Venipuncture ACTH levels change with the body's natural 24-hour cycle of processes (circadian rhythms). This test is most accurate if it is performed early in the morning.
Health Information Encyclopedia ACTH (cosyntropin) stimulation test 12/11/2011
Tests of adrenal reserve; Cortrosyn stimulation test How the test is performed: The health care provider will measure the cortisol in your blood before and 60 minutes after an ACTH injection. A blood sample is needed.
Health Information Encyclopedia ADH 12/11/2011
Arginine vasopressin; Antidiuretic hormone; AVP; Vasopressin How the test is performed: A blood sample is needed. For information on how this is done, see: Venipuncture How to prepare for the test: Talk to your health care provider about your medications before the test.
Health Information Encyclopedia Aerobic bacteria 05/22/2011
Aerobic bacteria are bacteria that can grow and live in the presence of oxygen. How the test is performed: How to prepare for the test: How the test will feel: Why the test is performed: Normal Values: What abnormal results mean: What the risks are: Special considerations: Review Date: 5/22/2011 Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine.
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