Trepanation

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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.

References in periodicals archive ?
ALIO investigation of a standard XY monolithic stage system drilling holes at varying speeds demonstrated that a circle can be machined precisely with minimal path deviation without the need for a trepanning head at very high hertz rates.
Machine-cycle time is also an important consideration when evaluating trepanning. Compared with drilling, trepanning is easily just as fast an operation, and usually faster.
With the trepanning module, developed at blz and extensively tested at LLT, it is possible to achieve highly accurate circular bore holes with high aspect ratios and adjustable flank angle.
A surgeon's tent will reveal spoons for removing damaged eyeballs and a trepanning saw for drilling holes in the skull.
'Unfortunately she returns with a dark gift he tries to remove by trepanning (a medical process of drilling or cutting a hole into the skull to relieve pressure on the brain).
Like many other metalworking industries, hole making in general, including boring, drilling, and trepanning suffer in the modern industrial world from an almost ridiculous image problem.
Dating from 1750 BC, it is the earliest local example of the practice of trepanning, a type of brain surgery used to alleviate the symptoms of bad headaches.
The excavations also called on the help of Birmingham University-based medical historian Robert Arnold, who identified individual medical conditions like pressure aneurisms and practices such as trepanning.
They include an 18-inch amputation saw used to remove badly injured and infected limbs, plus a fearsome trepanning drill for making holes in skulls in major operations - which was thought to release pressure from the brain.
components of the motor complex for trepanning the skull 29 name.
She survived the bizarre procedure, known as trepanning, and later returned home to Newent, Glos.
Although, given the video was a showreel of Raquel Welsh's sexiest moments, I would have kept watching had Barrack Obama been trepanning on stage.