English textbooks

What is amenorrhea in teens? Amenorrhea is when a girl’s menstrual bleeding (period) doesn’t occur. There are 2 types: Primary amenorrhea. This type is when the first menstrual bleeding at puberty doesn’t occur by age 15. This problem may…

Does this test have other names? Blood ammonia test, NH3 What is this test? This test checks the level of ammonia in your blood. It helps find out why you may have changes in consciousness and also helps diagnose a…

What is an amniocentesis? Amniocentesis is a procedure used to take out a small sample of the amniotic fluid for testing. This is the fluid that surrounds the fetus in pregnancy. Amniotic fluid is a clear, pale yellow fluid that:…

Does this test have other names? Amphetamine concentrations screen (blood), amphetamine screen (blood) What is this test? This test measures the amount of a drug called amphetamine in your blood. This drug is a central nervous system stimulant. This group…

Does this test have other names? Urine drug test, AMP, toxicology urine screen What is this test? This test looks for amphetamine in your urine. Amphetamine is a drug that stimulates your central nervous system. It can show up in…

What is ampullary cancer? Ampullary cancer is a rare type of cancer. It occurs when cancer starts in the part of the body called the ampulla of Vater. The ampulla of Vater is a small opening where the pancreatic and…

Talk with your surgeon about what to expect during your procedure. An amputation requires a stay in a hospital. Procedures may vary depending on the type of amputation, your condition, and your surgeon’s practices. An amputation may be done while…

Does this test have other names? Serum amylase What is this test? This test measures the level of the enzyme amylase in your blood. Amylase helps digest carbohydrates in your food. About 40% of the amylase in your body is…

What is an animal allergen? Allergens found in animals are a common cause of allergic reactions. They are caused by the proteins found in an animal’s: Skin (dander) Saliva Urine …

Many symptomatic conditions of asthma require clinical care by a physician or other health care professional. Listed in the directory below are some of the conditions that result from allergic reactions, for which we have provided a brief overview. …

Does this test have other names? Amylase What is this test? This test measures how much of the enzyme amylase is in your urine. About 40% of the amylase in your body is made by your pancreas. The rest comes…

What is ALS? Amyotrophic lateral sclerosis (ALS) is a fatal type of motor neuron disease. It causes progressive degeneration of nerve cells in the spinal cord and brain. It’s often called Lou Gehrig disease after a famous baseball player who…