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Common handheld surgical retractors. A retractor is a surgical instrument used to separate the edges of a surgical incision/wound or to hold away certain organs and tissues (i.e. to provide tissue retraction) so that body parts underneath may be accessed during surgical operations.
Retracted (phonetics), a sound pronounced to the back of the vocal tract, in linguistics; Retracted tongue root, a position of the tongue during the pronunciation of a vowel, in phonetics; Sternal retraction, a symptom of respiratory distress in humans; Retraction (kinesiology), an anatomical term of motion
Tympanic membrane retraction describes a condition in which a part of the eardrum lies deeper within the ear than its normal position. The eardrum comprises two parts: the pars tensa , which is the main part of the eardrum, and the pars flaccida , which is a smaller part of the eardrum located above the pars tensa.
Protraction and retraction is an anterior (protraction) or posterior (retraction) movement, [44] such as of the arm at the shoulders, although these terms have been criticised as non-specific. [45] Reciprocal motion is alternating motions in opposing directions. [46] Reposition is restoring an object to its natural condition. [47]
Clot retraction is the "shrinking" of a blood clot over a number of days. In doing so, the edges of the blood vessel wall at the point of injury are slowly brought together again to repair the damage that occurred. Clot retraction is dependent on the release of multiple coagulation factors from platelets trapped in the fibrin mesh of the
This bulb is called a "retraction ball", the histological hallmark of diffuse axonal injury. [9] When the axon is torn, Wallerian degeneration, in which the part of the axon distal to the break degrades, takes place within one to two days after injury. [26]
There are many different surgical specialties, some of which require specific kinds of surgical instruments to perform.. General surgery is a specialty focused on the abdomen; the thyroid gland; diseases involving skin, breasts, and various soft tissues; trauma; peripheral vascular disease; hernias; and endoscopic procedures.
A Danish survey found that the mean age of first foreskin retraction is 10.4 years. [ 18 ] Rickwood, as well as other authors, has suggested that true phimosis is over-diagnosed due to failure to distinguish between normal developmental non-retractability and a pathological condition.