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Detail from The Extraction of the Stone of Madness, a painting by Hieronymus Bosch depicting trepanation (c. 1488–1516). Trepanning, also known as trepanation, trephination, trephining or making a burr hole (the verb trepan derives from Old French from Medieval Latin trepanum from Greek trúpanon, literally "borer, auger"), [1] [2] is a surgical intervention in which a hole is drilled or ...
The rotating crank is typically connected to several cogs that set pressure on the skull. This specific drill is not connected to any external power and is used very little in today's operations. [9] The manual cranial drill is the most used and predominant type of drill in surgery, and performs manually. It has an adjusted stopper based on the ...
A hand drill is the simplest primitive method to produce rapid rotary motion of a rod. It consists in holding the rod vertically between both hands and moving these back and forth, in opposite directions, as in rubbing them. The rod typically is one or two feet long and half an inch in diameter. Hand drills have been used by many primitive ...
The hand drill was a vertical type of weighted, and counterbalanced boring bar, (used today in horizontal lathe-work boring, for example: rifle tubes).The hieroglyph shows the weights used as pictured on temple reliefs; the weight of the stones does the tool work, and the artisan simply supplies the rotational motion of the tool, for boring the hole.
Most hand injuries are minor and can heal without difficulty. However, any time the hand or finger is cut, crushed or the pain is ongoing, it is best to see a physician. Hand injuries when not treated on time can result in long term morbidity. [6] Simple hand injuries do not typically require antibiotics as they do not change the chance of ...
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Sold more as a novelty item than a magic trick, finger guillotines are a minor variation on the basic theme. The setup is usually a small version of the full-sized devices, 4 to 6 inches (10–15 cm) tall, complete with side uprights. The trick is performed by inserting a finger through the "head hole" and then the blade is activated.