Skull drill bit

Abstract

The invention belongs to the technical field of skull drills, and particularly relates to a skull drill bit which comprises a sleeve, a connecting shaft is fixedly connected to one end of the sleeve, a drill bit is slidably inserted into the other end of the sleeve, a movable rod is slidably inserted into the circle center of the drill bit in a penetrating mode, and a silica gel block is rotatably connected to the end, located outside the sleeve, of the movable rod; a limiting rod is slidably inserted into the other end of the movable rod, the limiting rod is fixedly connected with the inner wall of the sleeve, and the limiting rod is sleeved with a first spring. By arranging the locking device, when the skull is drilled through, the movable rod extends out of the drill bit under the action of the first spring; at the moment, the limiting block is pulled by the push rod to enter the movable rod again, so that the drill bit is not locked by the limiting block any more, and then the drill bit is driven by the push device to contract into the sleeve; therefore, the drill bit is prevented from continuously drilling the skull of the patient, the soft cerebral membrane of the patient is protected from being damaged by the drill bit, and the occurrence rate of postoperative epilepsy of the patient is reduced.

Description

technical field [0001] The invention belongs to the technical field of skull drills, in particular to a skull drill bit. Background technique [0002] Skull drill is a kind of medical device used in neurosurgery to open a hole in a patient's skull. When in use, the drill bit of the skull drill is aimed at the patient's skull, and the operation of opening a hole in the skull can be realized by turning the handle. [0003] When drilling, because different patients have different skull thicknesses, the drilling depth of the drill bit cannot be accurately controlled. At the same time, because the drill bit is relatively sharp, when the drill bit penetrates too deep, the patient's pia mater will be punctured by the drill bit , which in turn leads to tissue hemorrhage under the pia mater. If it is not treated in time or handled poorly, it will increase the incidence of postoperative epilepsy in patients. [0004] Therefore, it is necessary to invent a kind of skull drill bit to s...

AI Technical Summary

Problems solved by technology

[0003] When drilling, because different patients have different skull thicknesses, the drilling depth of the drill bit cannot be accurately controlled. At the same time, because the drill bit is relatively sharp, when the drill bit penetrates too deep, the patient's pia mater will be punctured by the drill bit , and then lead to tissue bleeding under the pia mater, if it is not treated in time or handled poorly, it will increase the incidence of postoperative epilepsy in patients

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