Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «E»:
ELISA: ELISA stands for "enzyme-linked immunosorbent assay." This is a rapid immunochemical test that involves an enzyme (a protein that catalyzes a biochemical reaction). It also involves an antibody or antigen (immunologic molecules).
ELISA tests are utilized to detect substances that have antigen...
Elizabeth Blackwell: See: Blackwell, Elizabeth....
Elizabeth Kubler-Ross: See: Kubler-Ross, Elisabeth....
Elliptocytosis: Hematologic disorder characterized by
elliptically shaped red blood cells (elliptocytosis) with variable breakup of red cells (hemolysis) and varying degrees of anemia. Inherited as a dominant trait. Due to mutation (change) in one of the genes encoding proteins of the red cell membr...
Ellis-van Creveld syndrome
Ellis-van Creveld syndrome: A type of short stature with striking shortening of the ends of the extremities (arms and legs), polydactyly (extra digits), fusion of bones in the wrist, dystrophy (abnormal growth) of the fingernails, change in the upper lip variously called 'partial hare-lip,' 'lip-tie...
EM (electron microscope)
EM (electron microscope): A microscope in which an electron beam replaces light to form the image. EM stands for electron microscope (the device) and for electron microscopy (the technique and field).
EM has its pluses (greater magnification and resolution than
optical microscopes) and minuses (you...
Emboli: Something that travels through the bloodstream, lodges in a blood vessel and blocks it. Examples of emboli are a detached blood clot, a clump of bacteria, and foreign material such as air.
Pulmonary emboli are blood clots that have been carried through the blood into the pulmonary artery (th...
Embolism: The obstruction of a blood vessel by a foreign substance or a blood clot blocking the vessel. Something travels through the bloodstream, lodges in a vessel and plugs it.
Foreign substances that can cause embolism include an air bubble, amniotic fluid, a globule of fat, a clump of bacteri...
Embolism, crossed: See Embolism, paradoxical....
Embolism, fat: A process by which fat tissue passes into the bloodstream and lodges within a blood vessel. In general, an embolus is something that travels through the bloodstream, lodges in a blood vessel, and blocks it. A fat embolus is a fat particle or droplet that travels through the circulati...
Embolism, paradoxical: Passage of a clot (thrombus) from a vein to an
artery. When clots in veins break off (embolize) , they travel first to the right side of
the heart and, normally, then to the lungs where they lodge. The lungs act as a filter to
prevent the clots from entering the arterial circu...
Embolism, pulmonary: The obstruction of the pulmonary artery or a branch of it leading to the lungs by a blood clot, usually from the leg, or foreign material causing sudden closure of the vessel. (Embolus is from the Greek "embolos" meaning plug.)
The risk factors for pulmonary embolism include ad...
Embolization: A treatment that clogs small blood vessels and
blocks the flow of blood, such as to a tumor. ...
Embolus: Something that travels through the bloodstream, lodges in a blood vessel and blocks it. Examples of emboli are a detached blood clot, a clump of bacteria, and foreign material such as air.
A pulmonary embolus is a blood clot that has been carried through the blood into the pulmonary artery...
Embryo: The organism in the early stages of growth and differentiation from fertilization to, in humans, the
beginning of the third month of pregnancy. After that point in time, it is termed a fetus.