Cranium fixation device and its surgical tools

Abstract

The present invention provides a cranium fixation device and its surgical tool. The cranium fixation device at least includes a lower pressing part and a movable buckle assembly, and the lower pressing part has a stud with a first joint part inside; the movable buckle The assembly at least includes an upper pressing member and a nut. The upper pressing member has a fitting part with a first pivot inside. The nut can be screwed with the stud, and a first positioning part is provided at the upper end , the outer surface of which is provided with a second pivot that matches the first pivot; the surgical tool at least includes an outer sleeve and an inner guide rod, and the lower end of the outer sleeve is provided with a joint that is combined with the first positioning portion of the nut. The second positioning part, the lower end of the inner guide rod is provided with a second joint part combined with the first joint part of the stud; accordingly, when the entire movable buckle assembly is positioned on the outer sleeve, it can be arranged with a certain distance from the outer surface of the skull , to facilitate the implantation and reset of the cranium, only one hand can achieve fast and effective implantation or removal, which is quite convenient and progressive in clinical operation.

Description

technical field [0001] The invention relates to a cranium fixation device and an operation tool thereof, in particular to a cranium fixation device and an operation tool thereof which can achieve simple, effective and rapid clinical operation regardless of implantation or removal. Background technique [0002] Take the cranium fixation device as an example, such as the Taiwan patent announcement I321463 "Cranial fixation device" patent antecedent, including a bushing, a through pipe, a flange at one end of the through pipe, and a base plate at the through pipe The other end of the bolt, and a hole in the bottom plate; a bolt, with a head, and a body extending from the head and passing through the hole in the bushing; and a nut, screwed on the The body of the bolt and is located in the through tube of the bushing. [0003] Although the aforementioned fixation device can achieve the functions of positioning the cranium and protecting the patient's head, and can be used repeat...

AI Technical Summary

Problems solved by technology

[0003] Although the aforementioned fixation device can achieve the functions of positioning the cranium and protecting the patient's head, and can be used repeatedly, the bushing, a bolt and a nut are separate independent components, which must be sequentially clamped by means of a clamping tool. Only when the bolts are implanted can the positioning be implanted, especially after the bolts are implanted, the clamping tool must be put down first, then the skull is reset, and then the bushing and nuts are implanted in sequence with the clamping tool, which makes the clinical implantation operation quite inconvenient. After the positioning of each component, the nut top must be clamped by cooperating with another rotary tool.

[0004] Only by turning the nut and the stud and moving down, and driving the bushing and the head of the bolt to generate clamping force, the skull is firmly fixed on the skull, causing the clamping components to be implanted. Positioning requires a clamping tool, and when the rotation is tight, another rotating tool must be used. No matter whether it is implanted or removed, two tools must be used. The cost is high and the clinical operation procedure is quite complicated and inconvenient.

[0005] In addition, the fixing device mainly uses multiple grooves on the top of the nut for the corresponding protrusions of the surgical tool to be locked, so as to rotate the nut and the stud and drive the bush to press down and clamp, but because the surgical tool only uses the lower end and the nut The corresponding concave-convex structure on the periphery of the top end is not firm enough to cause the surgical tool to drive the nut to rotate and often come off. Repeated positioning is necessary, and the operation is quite inconvenient.

[0006] Furthermore, after surgery on the head, hydrops are likely to form in the brain. If the interstitial fluid in the brain cannot be drained effectively and quickly, it is easy to cause excessive hydrops and brain pressure, swelling and compression. However, the above-mentioned fixation device has no drainage structure, causing doctors to It is necessary to drill a hole on the side for the drainage tube to be inserted into the drainage, which is quite inconvenient relative to the increase in surgical procedures

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