CN107714193A - A kind of stereotaxis guide - Google Patents

Abstract

The invention discloses a stereotaxic guide, which comprises a positioning cap and a guiding cone. The positioning cap has a central circular hole. The upper part of the guiding cone is a cylindrical structure, and the lower part is a rounded platform structure. The diameter of the lower end of the through hole is the same as that of the central circular hole; the upper edge of the guide cone has rounded corners, and the positioning cap has an inner fillet coupled with the upper edge of the guide vertebral body. The present invention can not only determine the puncture path through the central round hole of the directional cap and the round hole at the lower end of the guide cone, guide the ventriculoscope to advance to the target area of the operation along the preset path; The cone-shaped adjustable space, the round hole at the lower end of the guide cone is placed on the surface of the brain tissue before puncture, so that the ventriculoscope can minimize the disturbance of the brain tissue and obtain a maximum observation range.

Description

A Stereotaxic Guide

technical field

The invention belongs to the field of medical equipment, and relates to a stereotaxic guide, which is used for the stereotaxic of a ventriculoscope.

Background technique

At present, the commonly used stereotaxic instruments include Leksell orientation system, BRW/CRW orientation system, and Todd‐well orientation system; in China, there are ASA‐601 and 602 orientation instruments from Shenzhen Anke High-Tech Co., Ltd. The principle is that a frame needs to be installed outside the skull first, and then the frame and the patient are scanned by CT or MRI, and then the CT or MRI image of the patient's brain with frame coordinate parameters is obtained. The anatomical structure of the image will have a corresponding coordinate value in this coordinate system, and then the coordinate point is positioned by the mechanical data defined by the brain stereotaxic instrument, and the puncture path determined by the guide and stopper guides the instrument to this coordinate point to achieve brain stereotaxy.

However, the problem with the above-mentioned orientation instrument is that the fixing effect of the guide and the stopper on the guide pin can only be used for guiding the specified position and path, and cannot be extended to the surrounding environment.

Contents of the invention

The purpose of the present invention is to address the deficiencies in the prior art, to provide a stereotaxic guide, which is suitable for brain stereotaxic instrument and frameless stereotaxic, that is, suitable for the positioning of the target point, and can also be used within a certain range , to achieve the treatment around the target.

The object of the present invention is achieved through the following technical solutions: a stereotaxic guide, comprising a positioning cap and a guiding cone, the positioning cap has a central circular hole, the upper part of the guiding cone is a cylindrical structure, and the lower part is an inverted It has a circular platform structure, with a through hole whose diameter gradually decreases from top to bottom, and the diameter of the lower end of the through hole is the same as that of the central circular hole; the upper edge of the guide vertebra has rounded corners, and the positioning cap has the same shape as the upper edge of the guide vertebra. Coupled fillets.

Further, the wall of the central circular hole has a rubber ring.

Further, the upper end of the guide cone has a flange.

Beneficial effects of the present invention:

1. When the positioning cap and the guiding vertebral body are coupled, the puncture path can be determined through the round hole in the center of the positioning cap and the round hole at the lower end of the guiding cone, and the ventriculoscope will be guided to the target area of the operation along the preset path;

2. After reaching the target area of the operation, decouple the positioning cap from the guide cone. The ventriculoscope has a tapered adjustable space with the puncture path as the central axis. Before puncture, place the round hole at the lower end of the guide cone on the brain. The surface of the tissue, so that the ventriculoscope can minimize the disturbance of the brain tissue and obtain the maximum observation range.

Description of drawings

Fig. 1 is the structural representation of stereotaxic guide device of the present invention;

Fig. 2 is the structural representation of positioning cap;

Fig. 3 is the structural representation of guide cone;

Fig. 4 is a schematic diagram of the rotation of the ventriculoscope in the stereotaxic guide;

In the figure, a positioning cap 1, a guide cone 2, a central circular hole 11, and a through hole 21 are shown.

detailed description

As shown in Figure 1, a kind of stereotaxic guider is applicable to existing brain stereotaxic instrument and frameless stereotaxic; It comprises positioning cap 1 and guiding cone 2, and described positioning cap 1 has central circular hole 11 ; The upper part of the guide cone 2 is a cylindrical structure, so that it is suitable for the guide base of the existing stereotaxic instrument or the fixed support of the frameless stereotaxic, and the lower part is a rounded table structure, which is convenient for aligning with the designated position. It has a through hole 21 whose diameter gradually decreases from top to bottom; the upper edge of the guide cone 2 has rounded corners, and the positioning cap 1 has an inner fillet matched with the upper edge of the guide vertebral body 2 .

When in use, the puncture path of the ventriculoscope is determined by the stopper and guide of the stereotaxic instrument, so that the ventriculoscope advances to the target area of the operation along the preset path, and can follow the path to explore the conditions of different depths; then remove The stopper, the ventriculoscope located in the through hole 21 of the introducer can be turned along the side wall of the through hole 21, as shown in FIG. 4 . The lumen of the guide cone 2, that is, the through hole 21 that gradually decreases from top to bottom can provide a cone-shaped adjustable space for the ventriculoscope. , no matter how the lens at the front end is adjusted, the agitation of the lens body on the surface of the brain is very small. As the depth of the lens body penetrates into the brain tissue increases, its adjustable space becomes larger, that is, the deeper the lesion, the larger the observation range. Thus, with the minimum disturbance of brain tissue, the maximum observation range is obtained.

And when you lose your way during the operation, just slide the positioning cap 1 to the coupling position of the guide cone 2, and the ventriculoscope will return to the original puncture path. Visual assessment. The rounded corner design can avoid the problem of the guide pin being locked when it moves.

In the same way, the same function as above can be realized by placing the introducer on the frameless stereotaxic fixed support, and locking the position of the introducer after completing the positioning and guiding operation.

As a preferred technical solution, the upper end of the guide cone 2 has a flange to assist the fixation of the guide base. The hole wall of the central circular hole 11 has a rubber ring, so that there is a relatively high friction force between the positioning cap 1 and the ventriculoscope, so as to avoid relative sliding.

Claims (3)

1. A kind of 1. stereotaxis guide, it is characterised in that including positioning cap (1) and guiding cone (2), the positioning cap (1) Be provided with center hole (11), guiding cone (2) top is cylindrical structural, and bottom is inverted round stage structure, inside have aperture from The through hole (21) that top to bottm tapers into, and the through hole (21) lower end diameter is identical with center hole (11)；The guiding vertebra Body (2) upper end edge has fillet, and positioning cap (1) has the filleted corner being coupled with being oriented to centrum (2) upper end edge.
2. 2. guide according to claim 1, it is characterised in that center hole (11) hole wall has rubber ring.
3. 3. guide according to claim 1, it is characterised in that guiding cone (2) upper end has flange.