What does the word trepan mean?
1 archaic : trickster. 2 archaic : a deceptive device : snare. trepan.
What is trepan drilling?
Trepanning is a technique used for drilling larger hole diameters where machine power is limited as it is not as power-consuming as conventional drilling, where the entire hole is converted into chips. Instead of removing all the material in the form of chips, a core is left at the center of the hole.
Is trepanation still used today?
Trepanation is still used today, often to treat bleeding on the brain. However, making a permanent hole in someone’s head isn’t a safe thing to do, and these days if a doctor makes a hole in a skull they usually replace the bone and patch it up.
Why did doctors drill holes in skulls?
According to the French physician Paul Broca, ancient physicians were quite familiar with trepanation in which a hole was made in the skull by cutting or drilling it. They did so to alleviate pressure on the brain following an injury to the head, or to release evil spirits from the heads of mentally ill people (4).
What is the difference between lobotomy and trepanation?
Lobotomy is another surgical treatment that involves drilling a hole in a person’s skull. Unlike trepanation, however, the aim of lobotomy is to sever nerve fibers in the brain that connect the frontal lobe—the area of the brain responsible for thinking—with other brain regions.
Who invented Trephination?
The famous Greek physician Hippocrates wrote of this practice being used when someone’s head was indented or bruised. During the Middle Ages and into the 16th century, trepanning continued to be used frequently.
What did trepanation treat?
Trepanation is a treatment used for epidural and subdural hematomas, and surgical access for certain other neurosurgical procedures, such as intracranial pressure monitoring. Modern surgeons generally use the term craniotomy for this procedure.
Why did they use trepanation?
In ancient times, trepanation was thought to be a treatment for various ailments, such as head injuries. It may also have been used to treat pain. Some scientists also think that the practice was used to pull spirits from the body in rituals. Many times, the person would survive and heal after the surgery.
Can you get a lobotomy today?
Today lobotomy is rarely performed; however, shock therapy and psychosurgery (the surgical removal of specific regions of the brain) occasionally are used to treat patients whose symptoms have resisted all other treatments.
What is the difference between trepanation and Trephination?
Trephination is the surgical procedure in which a hole is created in the skull by the removal of circular piece of bone, while a trepanation is the opening created by this procedure (Stone and Miles, 1990).
What are the dimensions of the Trepan tool assembly?
2 7/8″ diameter x 15 1/2″ deep straight shank trepan tool assembly. 5 5/16″ diameter x 20″ deep CAT 50 shank trepan tool assembly with CR-5 coolant inducer ring. O.D. exhaust trepan head.
How does a trepanning tool work?
As the trepanning tool feeds into the work piece, the trepan bit or insert cuts a groove the width of the bit and a solid metal core remains. Because only the width of the bit is cut, trepanning is faster and more efficient than drilling with spades or indexable drills.
What is the origin of the word Trepan?
In another version of the etymology, a quite different triangular instrument for boring a hole in the skull was invented in 1639 by John Woodall, a London surgeon, who also called his instrument a tres fines, which became trefina and then trephine and, eventually, a synonym for trepan.
What are the latest developments in trepanning?
Another interesting development was the return of E. L. Margetts to the Kisii of Kenya, whose trepanning practices he had studied 25 years earlier. He estimates that there may now be more than 100 surgeons carrying out the operation. Unlike in the past, they now use modern Western local anesthetics injected into the scalp prior to surgery.