Trepanation

(redirected from trepan)
Also found in: Dictionary, Thesaurus, Medical, Wikipedia.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Trepanation

 

(also trephination), in medicine, the surgical section of the medullary cavity of a bone. The operation is performed with special instruments, including a trephine (or crown saw), forceps, and gouges. In former usage, “trepanation” referred only to the surgical opening of the cranial cavity to remove a brain tumor or hematoma, for example, or to apply a ligature to an injured vessel. In modern medical practice, trepanation is also performed on the tubular bones in cases of osteomyelitis, and on the mastoid in mastoiditis. Dental trepanation is the surgical formation of an opening through the gum and bone of a tooth. Corneal trepanation is the surgical cutting of the sclera. Trepanation is also used for the withdrawal of bone marrow for examination, as in sternal biopsy.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Javah Rajah was disqualified, Breasley was fined Ff20,000, and Tikkoo expressed the view, felt privately by others, that the French simply wanted revenge after Trepan had been disqualified for failing drugs tests after finishing first in the Prince of Wales's Stakes and the Eclipse.
I was only five at the time, so don't remember the race, but dad has told me no end of times how Sir Henry brought Wollow back from his Derby defeat to run second in the Eclipse, before being awarded the race on the disqualification of the Frenchtrained Trepan.
I even backed Caro to beat Mill Reef, and though I had my money on Wollow, the bookmakers paid out on Trepan on the day, and it was months before the result was changed.
Several types of tools are used to trepan. The most basic is a single- or double-point cutter.
Consigned by Hill 'n' Dale Sales Agency, Cozzene's Angel is a daughter of Cozzene, out of the French-bred Trepan mare Charming P an.