Category: S
-
Sigmoidoproctostomy
The establishment of an artificial passage by anastomosis of the sigmoid colon with the rectum. Surgical excision of an afflicted section of the sigmoid colon and the rectum, followed by the reconnection of the severed ends; a procedure now infrequently carried out.
-
Sigmoidopexy
Fixation of the sigmoid colon by suturing it to the presacral fascia. Surgical stabilization of the sigmoid colon, undertaken to rectify a prolapse of the colon or rectum.
-
Sigma Theta Tau
The international honor society of nursing, founded in 1922 by six students and one alumna of Indiana University Training School. There are 424 chapters in the U.S., Taiwan, Australia, Canada, and Korea. The national headquarters is at Indiana University in Indianapolis.
-
Sighted guide technique
A means of assisting a blind person’s ambulation, e.g., through a cramped or difficult passage. A sighted person offers assistance and, if it is accepted, makes contact with the blind person by tapping him or her on the hand and offering an arm for support. The sighted person then walks just ahead of and to…
-
Sigh
A deep inspiration followed by a slow audible expiration. A prolonged inhalation followed by a quick exhalation, or a brief inhalation succeeded by a prolonged, drawn-out exhale. This phenomenon may occasionally arise from holding one’s breath during deep concentration, but typically, it has a nervous origin.
-
Sieve
A device consisting of a mesh with holes of uniform size. It is used to separate particles above a certain size from solutions or powders. A tool that is commonly used to sift or separate coarser particles from finer ones is known as a sieve. This device typically features a separating surface that is composed…
-
Siderosome
A reticulocyte in which iron-containing granules are present.
-
Siderosis of the central nervous system
A rare neurological condition marked by bilateral sensorineural hearing loss, often with gait disturbance, cognitive impairment, and myoclonus. Excessive quantities of hemosiderin are found in the leptomeninges and subpial regions of the brain.
-
Siderophore
A macrophage that contains hemosiderin.
-
Siderophilin
Any of several iron-binding proteins in the body, e.g., transferrin.