Shovel type fixed depth safety cone hand drill

Abstract

The invention discloses a shovel type fixed-depth safety cone awl cranium hand drill. The hand drill is characterized by being provided with an annular handle and an equal-diameter hollow drill bit. The rear end of the equal-diameter hollow drill bit is perpendicularly connected with the outer-diameter wall of the annular handle. The front end of the equal-diameter hollow drill bit is an involute-shaped arc shovel face. An oval cutting blade is formed at the front end of the equal-diameter hollow drill bit through the arc shovel face. The cutting blade is formed by the outer wall of the equal-diameter hollow drill bit and a bone debris collection face, an included angle of 15-25 degrees is formed between the bone debris collection face and the outer wall of the equal-diameter hollow drill bit, at least five safety bolt holes are sequentially formed in the portion, behind the cutting blade, of the equal-diameter hollow drill bit from front to back, the distance between the safety bolt holes is gradually decreased from front to back, the distance between the axial line of the first bolt hole and the rear end of the cutting blade of the arc shovel face is at least 1 mm, and one end of one safety bolt hole is connected with another safety bolt hole through a thread. According to the shovel type fixed-depth safety cone awl cranium hand drill, a skull hole is formed, and bone debris is removed; surgery safety is ensured through the safety bolts; the drill bit start safety depth is quantized, and the surgery quality is improved; the hand drill accords with human body engineering characteristics and is high in operation efficiency.

Description

technical field [0001] The invention relates to a medical appliance, in particular to a shovel-shaped and fixed-depth safe cranial cone hand drill for conical extracranial drainage. Background technique [0002] At present, cranial cone surgery is a common operation for the treatment of intracerebral lesions such as hypertensive cerebral hemorrhage and hydrocephalus, which has the advantages of minimally invasive and efficient. Currently used skull drilling tools include: hand drill, cranial cone, electric self-stop craniotomy drill and so on. The above-mentioned surgical instruments have their own shortcomings in terms of ease of use, safety, avoidance of bone debris retention, and maintenance: 1. Hand drill: skin soft tissue incision, skull bone hole is too large, time-consuming operation, high requirements for anesthesia and aseptic conditions; 2. Because the head of the cranial cone is triangular, it is impossible to remove the skull debris, and often brings the skull d...

AI Technical Summary

Problems solved by technology

The above-mentioned surgical instruments have their own shortcomings in terms of ease of use, safety, avoidance of bone debris retention, and maintenance: 1. Hand drill: skin soft tissue incision, skull bone hole is too large, time-consuming operation, high requirements for anesthesia and aseptic conditions; 2. Because the head of the cranial cone is triangular, it is impossible to remove the skull debris, and often brings the skull debris into the brain tissue, increasing the chance of injury and postoperative infection; most of the devices for preventing deep puncture are screws. Friction prevents the cone from being too deep, and it is not convenient to quantify the depth of the drill bit, so the use effect is poor; 3. Electric self-stop cranial drill: It cannot remove bone debris, and the self-stop protection of the drill bit touching the skin often interferes with the drilling of the skull, resulting in practical operation. The safety is reduced, the maintenance of electric drills is difficult, the battery maintenance frequency is high, and the disinfection is cumbersome. It is easy to affect the emergency use due to improper control of certain links. In addition, the equipment costs are high, and often cannot meet the needs of continuous operations due to equipment disinfection.

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