Abdominal CT scan 11/21/2010 () Computed tomography scan - abdomen; CT scan - abdomen; CAT scan - abdomen How the test is performed: You will be asked to lie on a narrow table that slides into the center of the CT scanner. Usually, 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.
Abdominal MRI scan 11/21/2010 () 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 fasteners (such as sweatpants and a t-shirt).
Abdominal tap 07/07/2010 () 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.
Abdominal ultrasound 11/21/2010 () Ultrasound - abdomen; Abdominal sonogram How the test is performed: An ultrasound machine creates images that allow various organs in the body to be examined. The machine sends out high-frequency sound waves, which reflect off body structures to create a picture.
Abdominal wall fat pad biopsy 02/21/2011 () Abdominal wall biopsy; Biopsy - abdominal wall fat pad How the test is performed: Needle aspiration is the most common method of obtaining an abdominal wall fat pad biopsy . The skin of the abdomen is cleansed, and a local anesthetic may be used to numb the area.
Abdominal x-ray 02/10/2010 () Abdominal film; X-ray - abdomen; Flat plate; KUB x-ray How the test is performed: The test is performed in a hospital radiology department or in the health care provider's office by an x-ray technologist.
Abscess scan - radioactive 11/21/2010 () Radioactive abscess scan; Abscess scan How the test is performed: Blood is typically 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).
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.
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.
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.
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.
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.
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.
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.
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.