Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «B»:
Blood, urinary: Medically called hematuria, blood in
the urine can be microscopic or gross. Evaluating hematuria requires consideration of the
entire urinary tract. Tests used for the diagnosis of hematuria include the intravenous
pyelogram (IVP), cystoscopy, and urine cytology. Management of hematu...
Blood-brain barrier: A protective network of blood vessels and cells that filters blood flowing to the brain. ...
Blood-thinner: A common name for an anticoagulant agent used to prevent the formation of blood clots. Blood-thinners do not really thin the blood. They prevent it from clotting.
Blood-thinners (anticoagulants) have various uses. Some are used for the prophylaxis (prevention) of thromboembolic disord...
Bloody nose: The nose is a part
of the body that is very rich in blood vessels (vascular)
and is situated in a vulnerable position on the face. As a
result, any trauma to the face can cause bleeding which may
be profuse. Nosebleeds can occur spontaneously when the
nasal membranes dry out, cr...
Bloody show: 1. The blood-tinged mucus created by extrusion and passage of the mucous plug that filled the cervical canal (the canal between the vagina and uterus) during pregnancy. The bloody show is therefore a classic sign of impending labor.
2. The beginning of menstruation....
Bloody sputum: Coughed up blood or bloody mucus. Bloody sputum can be caused by infection in the lungs and airways, such as acute bronchitis or pneumonia and by cancer. Whenever bloody sputum is present and cannot be attributed to a curable infectious condition, a complete lung evaluation is warrant...
Blot, Northern: A technique in molecular biology, used mainly to separate and identify pieces of RNA.
Called a Northern blot only because it is
similar to a Southern blot (which is named after its inventor, the British biologist M.E. Southern). There is also a Western blot....
Blot, Southern: A test commonly used in molecular biology and genetics, the purpose of the test being to check for a match between DNA molecules.
In the Southern blot technique, DNA fragments are separated by a method called agarose gel electrophoresis, transferred (blotted) onto membrane filters,...
Blot, Western: A technique in molecular biology, used
to separate and identify proteins.
Called a Western blot merely because it has some similarity to a Southern blot (which is named after its inventor, the British biologist M.E. Southern). There is also a Northern blot....
Blue baby: A baby who is cyanotic (blue), due usually to a heart malformation that prevents the baby's blood from being fully oxygenated. The bluish color reflects the deoxygenated state of the blood. (Oxygenated blood is red.) Sometimes the term "blue baby" is also applied to a child who is cyanot...
Blue baby operation
Blue baby operation: A surgical procedure for a baby who is cyanotic (blue) due to a heart malformation that prevents blood from being fully oxygenated. The bluish color reflects the deoxygenated state of the blood. The surgery is designed to palliate or ideally correct the heart defect and relieve...
Blue cohosh: (Caulophyllum
thalictroides). A tall North American perennial plant with large blue berries. Blue cohosh is sold as an herbal dietary supplement that can induce labor. Blue cohosh contains the glycosides caulosaponin and caulophyllosaponin, which cause uterine contraction and constrict...
Blueberry root: See: Blue cohosh....
Blunted affect: See: Flat affect....
Blurred vision: Lack of sharpness of vision with, as a result, the inability to see fine detail.
Blurred vision can occur when a person who wears corrective lens is without them. Blurred vision can also be an important clue to eye disease....