Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «S»:
Stenosis, spinal: See: Spinal stenosis....
Stenosis, subaortic: Narrowing
of the left ventricle of the heart just below the aortic
valve through which blood must pass on its way up into the
aorta. The narrowing cuts the flow of blood. Subaortic
stenosis may be congenital (present at birth) or acquired
as part of a particular form of...
Stenotic: Narrowed, as in a stenotic artery. From the Greek "stenos" meaning narrow....
Stent: A tube designed to be inserted into a vessel or passageway to keep it open.
Stents are inserted into narrowed coronary arteries to help keep them open after balloon angioplasty. The stent then allows the normal flow of blood and oxygen to the heart.
Stents placed in narrowed carotid arterie...
Stent, coated: See: Coated stent....
Stent, medicated: See: Coated stent....
STEP procedure: See: Serial transverse enteroplasty....
Step protocol: See: Step therapy....
Step therapy: The practice of beginning drug therapy for a medical condition with the most cost-effective and safest drug therapy and progressing to other more costly or risky therapy, only if necessary. The aims are to control costs and minimize risks. Also called step protocol....
Stepfather: The husband of a woman who had a child by another man....
Stepmother: The wife of a man who had a child by another women. See: Novercal....
Steppage gait: A manner of walking in which the advancing foot is lifted high so that the toes clear the ground. Steppage gait is a sign of foot-drop....
Stercolith: See: Fecalith....
Stereotactic: Stereotactic refers to precise positioning in three-dimensional space. For example, biopsies, surgery or radiation therapy can be done stereotactically.
In a stereotactic needle biopsy, the spot to be biopsied is located three-dimensionally, the information is entered into a computer, ...
Stereotactic needle biopsy
Stereotactic needle biopsy: A biopsy in which the spot to
be biopsied is located three-dimensionally, the information is
entered into a computer, and the computer calculates the information
and positions a needle to remove the biopsy sample....