Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «S»:
Secondary pulmonary arterial hypertension
Secondary pulmonary arterial hypertension: See: Pulmonary hypertension....
Secondhand smoke: Also known as environmental tobacco smoke (ETS). See: ETS....
Secretary's knee: The patellofemoral syndrome
(PFS), the commonest cause of
chronic knee pain. PFS characteristically causes vague
discomfort of the
knee area, aggravated by activity (running, jumping,
climbing or descending
stairs) or by prolonged sitting with knees in a moderately
Secretase, beta-: An enzyme that appears to be directly involved in the early development of Alzheimer's disease. Beta-secretase is a protease (an enzyme that catalyses the splitting of interior peptide bonds in a protein). Beta-secretase acts by trimming off a protein protruding from a brain cell. ...
Secretin: A hormone made by glands in the small
intestine that acts to stimulate pancreatic secretions. Commercially available secretin is either porcine (pigs) secretin or a synthesized form of human secretin. Secretin is of special historic interest because the word "hormone" was coined in 1902 b...
Section: 1) In anatomy, a slice of tissue. A biopsy
obtained by surgery is usually sectioned (sliced), and these sections
are inspected under a microscope. 2) In obstetrics, short for
Caesarian section. 3) In surgery, the division of tissue during
Section, Caesarian: Also referred to as a C-section. A procedure in which a baby, rather than being born vaginally, is surgically extracted (removed) from the uterus.
As the name "Caesarian" suggests, this is not exactly a new procedure. It was done in ancient civilizations upon the death of a preg...
Section, Cesarian: The obstetrical procedure is often
spelled this way in the U.S. with just an "e"although the Roman emperor remains Caesar in America with an "ae". Also referred to as a C-section.
No matter what, it is a procedure in which a baby, rather than being born vaginally, is surgically ...
Section, cross: A transverse cut through a structure. The opposite is
a longitudinal section....
Section, longitudinal: A cut along the long axis of a structure....
Section, lower segment Cesarian (LSCS)
Section, lower segment Cesarian (LSCS): A Cesarian section in which
the surgical incision (cut) is made in the lower segment of the uterus....
Sedative: A drug that calms a patient down, easing
agitation and permitting sleep. Sedatives generally work by
modulating signals within the central nervous system. These sedatives
can dangerously depress important signals needed to maintain heart
and lung function if they are misused or acciden...
Sedimentation rate: A blood test that detects and
monitors inflammation in the body. It measures the rate at which red
blood cells (RBCs) in a test tube separate from blood serum over
time, becoming sediment in the bottom of the test tube. The
sedimentation rate increases with more inflammation....
Seed implantation: Radiation treatment given by placing radioactive material contained within a small cylindrical shell directly in or near the target, often a tumor....
Seedrin: Trade name of the insecticide aldrin. See: Aldrin and dieldrin....