Find answers to your health-related questions in our health encyclopedia.

  • Surgery

    D and C

    D and C (dilatation and curettage) is a procedure in which the vaginal canal is held open with a speculum and the cervix is dilated with a metal rod. A curette is then passed through the cervical canal into the uterine cavity where endometrial tissue is scraped away and collected for examination.

    D and C is a procedure to scrape and collect the tissue (endometrium) from inside the uterus. * Dilation (ā€œDā€) is a widening of the cervix to allow...

  • Test

    D-dimer test

    D-dimer tests are used to check for blood clotting problems. Blood clots can cause health problems, such as: Deep vein thrombosis (DVT) Pulmonary embolism...

  • Test

    D-xylose absorption

    The urinary system is made up of the kidneys, ureters, urethra and bladder.

    D-xylose absorption is a laboratory test to determine how well the intestines absorb a simple sugar (D-xylose). The test helps determine if nutrients are...

  • Special Topic

    Dacron graft

    A dacron graft is sutured to the aorta to repair an ascending aortic aneurysm.

    A Dacron graft is made out of a man-made (synthetic) polyester material. It is used to replace natural body tissues. Most Dacron grafts are in the shape of a...

  • Disease


    Dacryoadenitis is inflammation of the tear-producing gland (lacrimal gland).

  • Self-Care Instructions

    Daily bowel care program

    Nerves that help your bowels work smoothly can be damaged after a brain or spinal cord injury. People with multiple sclerosis also have problems with their...

  • Special Topics

    Dance your way to fitness

  • Special Topics

    DASH diet to lower high blood pressure

  • Special Topic

    Day care health risks

    Children in day care centers are more likely to catch an infection than kids who do not attend day care. Children who go to day care are often around other...

  • Self-Care Instructions

    Day to day with COPD

    Your doctor gave you the news: you have COPD. There is no cure, but there are things you can do every day to keep COPD from getting worse, to protect your...