| Dobutamine Stress Echocardiogram A dobutamine stress echocardiogram is a diagnostic procedure in which an intravenous medication called dobutamine is used when an exercise stress test is not recommended. Dobutamine mimics the effects of exercise on the heart. |
| Dilation and Curettage (D and C) A dilation and curettage procedure, also called a D and C, is a surgical procedure in which the cervix is dilated so that the cervical canal and uterine lining can be scraped with a spoon-shaped instrument to remove abnormal tissues. |
| Deep Brain Stimulation Deep brain stimulation (DBS) is a type of therapy that uses electrical stimulation to treat Parkinson’s disease, essential tremor, multiple sclerosis, and certain other neurological conditions. |
| Direct Bilirubin This test looks for bilirubin in your blood or urine. The test is usually done to look for liver problems, such as hepatitis, or blockages, such as gallstones. |
| D-Dimer This test is used to rule out whether you have a blood clot. When blood clots form and start to break down, they release the substance D-dimer into the blood. |
| Deamidated Gliadin Antibody This test helps your doctor find out whether you have celiac disease, an autoimmune disorder. |
| Dehydroepiandrosterone and Dehydroepiandrosterone Sulfate This test measures the level of DHEA and DHEA-S in your blood. It may also be used to check how well your adrenal glands are working. |
| Digoxin Drug Level This test measures the amount of the heart drug digoxin in your blood. When you take digoxin, it’s important that the drug be at the right level for you to benefit from it. |
| Diphtheria Antitoxoid Antibody This test measures the level of diphtheria antibodies in your blood. Diphtheria is extremely rare in the U.S., but you may be at risk if you have traveled to an area where the disease is common. |
| Direct Antiglobulin The direct antiglobulin test, or direct Coombs test, is a blood test used to diagnose a type of anemia caused by your immune system. |