SU441933A1 - Stereotactic apparatus - Google Patents

Description

one

I The invention relates to copper-J Zincry, namely to the neurosurgical technique.

The known stereotactic devices contain guides, an electric motor, electrodes, phantom and basal rings with coordinate scales, a segmental arc and a mechanism for moving the electrodes in the form of brackets.

Phantom stereotactic surgery with such devices takes a lot of time. In addition, they do not provide a smooth introduction of the electrode to the calculated point.

To shorten the time for the phantom operation and smoothly insert the electrode in the proposed apparatus using a movable and stationary spherical holder, a ball is attached to the segment arc, and the mechanisms for moving the electrodes are embedded in the ball and made with a guide sleeve, a slide with a socket

for fastening the electrodes and micrometer screw with a ruler.

In Fig.1 schematically depicts the described apparatus, side view; figure 2 is a cross section on AA figure 1, fig.Z - view along arrow B in figure 1; 4 shows a front view along arrow B: FIG. 3 is a section along G-D; on figb - phantom ring, top view, on fig.7 - basal ring, top view, on fig.8 - longitudinal section along dd in fig. /; figure 9 is a cross section along the EE in figure 7.

The stereotactic apparatus contains the phantom I and the basal 2 rings, to which the brackets 3 with screws 4 are fastened. In addition, the basal ring 2 is fixed on the rack with the straps 5.

The guide arc 6 can freely rotate relative to the phantom ring I on the axes 7. To the end of the phantom ring there is attached a 5 arc 8 with division, along which the slide 9 with the ruler 10 freely moves. The ruler has a guide II in which can be vertically moved. 12. The segmental arc 13 is rigidly connected with the slider 14 and fixed to the phantom ring I with the help of the-bracket 15 and fixed by the screw 16 in the slider 17. In addition, the slider 17 freely rotates relative to the bracket. 15. To the slider 14 with the help of a spherical holder 18, an electrode holder is attached with a mechanism for moving 19, which includes a guide sleeve 20, a micrometer screw 21, a slider 22 with a socket 23 for fastening the electrode 24, a ruler 25 and a ball 26. The stereotactic apparatus works as follows . The patient's head is fastened in the basal ring 2 with screws 4 so that the frontal line coincides with the plane passing along the line 90270 ° and the sagittal line with the plane passing along the line 0-1800. two x-rays are taken, which are images of the skull in the sagittal and froishal planes. In this case, the planes of the apparatus are combined with the central beam of two X-ray tubes. On x-ray films, the structure to be destroyed is determined according to intra brain reference points. After constructing a point on x-ray images, the coordinates of this structure are established in the following three planes of the basal ring: (frontal G-90-27СЯ sagittal -0-1800 and height from the plane of the basal ring to the point. Then corrected for the divergence of the rays. According to the calculated data, the coordinates are set using the guide o, the slider 9, lines 10 and Id, after which the guide 6 and the segment arc 13 are rotated for the presetting, respectively, the design point D. Freeing the ball 26 with the fur the displacement head 19 and the sleeve 18 direct the electrode 24 to the design point. A mill hole is applied to the skull bones, through which the electrode is inserted. 15 and screws 7, are transferred to the basal ring by moving the electrode 24 upward with screw 21 and slider 22 by the amount marked on ruler 25. This position is fixed on the basal ring 2 with screws 7 and cr 15, then the electrode with the help of a micrometer screw 21 and the slider 22 is introduced into the calculated point the value marked on the ruler. 25. The accuracy of the position of the electrode at the calculation point is monitored by X-rays and electrical stimulation. When the electrode is at a given point, electrolysis is performed. SUBJECT OF THE INVENTION A stereotactic apparatus comprising electrodes, phantom and basal rings with coordinate scales, a guide and segment arcs and mechanisms for moving electrodes, so that, in order to reduce the time for phantom operation and ensure smoothly inserting the electrode into the design point, a ball is attached to the segment arc using a movable and stationary spherical holder, and the moving mechanism is built into the ball and is made with a guide sleeve, a slider with a socket for mounting the electrodes and metric screw with a ruler.

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