JPH09253090A - Cranium fixing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and surely fix a head part. SOLUTION: Among the four pieces of fixing pin units 14 and 15 attached to a fixed frame 11, the fixing pin units 14 on a face side for fixing the head part A of a patient from the face side are capable of turning adjustment in the direction of an arrow X with a holder 18 extended in the thickness direction of the fixed frame 11 as a center and the fixing pin units 15 on a rear head part side for fixing the head part A from the rear head part side are incapable of the turning adjustment. In the case of fixing the head part A, since the fixing pins 22 of the fixing pin units 15 on the rear head part side are not turned, the rear head part side is surely fixed. Then, since the fixing pins 22 of the fixing pin units 14 on the face side are capable of the turning adjustment, by adjusting the fixing pins 22 to positions suitable for fixation, the head part A is easily and surely fixed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a skull fixing device provided with a plurality of fixing pin units having fixing pins for fixing a patient's head from the periphery thereof.

[0002]

A skull fixing device used for fixing a patient's head in brain surgery or the like has a fixing frame having a hole having a size into which the patient's head can be inserted and a fixing frame of the fixing frame. For example, it is generally configured to include a fixing pin unit that is attached to four points and has a fixing pin for fixing the patient's head from the periphery at each tip.

As the fixed pin unit,
The tip of each fixing pin is attached so as to face the center side of the fixing frame, and each fixing pin is configured to be rotationally adjustable about a shaft extending in the thickness direction of the fixing frame. There are a thing and a thing of the fixed type which made the rotation impossible.

When the head of a patient is fixed by this type of skull fixing device, it is necessary to change the position of the fixing pin with respect to the head according to the site to be operated and the size of the head. There is a circumstance that the position where the fixing pin is stuck is limited.

By the way, in the case of fixing the head of the patient, when each fixing pin unit is of the rotation adjusting type, the position of each fixing pin with respect to the head can be adjusted,
Although there is an advantage that the position of each fixing pin can be easily determined, since all the fixing pins are rotatable, there is a problem that the head easily moves when fixing and it is difficult to fix.

On the other hand, in the case where each fixed pin unit is of a fixed type, as described above, the position where the fixed pin is stabbed is limited, especially on the face side. There is a problem that it takes time.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a skull fixing device capable of easily and reliably fixing the head.

[0008]

In order to achieve the above-mentioned object, the present invention provides a fixing frame and a plurality of positions of the fixing frame, each of which fixes the patient's head from the periphery thereof. In a cranial fixation device including a plurality of fixing pin units having fixing pins for performing, a face side fixing pin unit for fixing the head of a patient from the face side among the plurality of fixing pin units, Rotational adjustment is possible around a shaft portion extending in the thickness direction of the fixed frame, and the occipital region side fixed pin unit for fixing the patient's head from the occipital region side has a configuration in which the rotational adjustment is impossible. It is characterized by.

According to this structure, when the head is fixed, the fixing pin of the occipital region side fixing pin unit does not rotate, so that the occipital region side can be reliably fixed by the fixing pin of the occipital region side fixing pin unit, Further, since the fixing pin of the face side fixing pin unit can be pivotally adjusted about the shaft portion, the head can be easily and surely fixed by adjusting the fixing pin to a position suitable for fixing. .

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. First, in FIGS. 1 to 3 showing the overall configuration, the fixed frame 11 has a ring shape having a hole 12 having a size into which the head A of a patient can be inserted.
It is detachably attached to the fixed frame holder 13. The face side fixing pin units 14 are attached to the fixing frame 11 at two positions on the upper right side of the front surface, and the face side fixing pin units 14 are provided on the lower right side of the front surface.
The occipital region side fixed pin unit 15 is attached to the position, and the head holder 16 for receiving the occipital region of the patient is attached to the lower front part. Further, on the front surface of the fixed frame 11, two mounting screws 17 for mounting markers (not shown) for measuring a diseased part position are attached at four positions in the vertical and horizontal directions.

Next, of the face-side and occipital-side fixed pin units 14 and 15, the face-side fixed pin unit 14 is used.
And the mounting structure thereof will be described in detail. As shown in FIGS. 9 to 11, the face side fixing pin unit 14 is for a holder 18 (corresponding to a shaft portion of the present invention) and a holder that is detachably screwed to an outer peripheral portion of one end portion of the holder 18. Nut 1
9 and a slide bar 2 having a substantially cylindrical shape that is movably inserted through an insertion hole 18a formed in the other end of the holder 18.
0, a support bar 21 fixedly attached to the tip of the slide bar 20 and extending in a direction orthogonal to the slide bar 20, and a male screw portion 22a formed on the outer periphery of the support bar 21. The male screw portion 22a is screwed into the formed screw hole and the fixing pin 22. The fixed pin 22 and the slide bar 20 are oriented in the same direction.

On the back surface (right side surface in FIG. 9) of the slide bar 20, there is formed a projection 23 extending along the longitudinal direction so as to cut out a part of a circle, and this projection is formed. In this case, four recesses 24 are formed in the region 23 at equal intervals. The width of each recess 24 (the width of the slide bar 20 in the longitudinal direction) is set to be the same. On the front surface (left side surface in FIG. 9) of the slide bar 20, as shown in FIG.
A display unit 25 called M and L is provided.

Then, in the fixing frame 11, two parts to which the face side fixing pin unit 14 is attached are shown in FIG.
And, as shown in FIG. 7, a cylindrical bush 2 having the same configuration.
6 are attached respectively. This bush 26
Is rotatably inserted in a circular hole 27 formed in the fixed frame 11 in a penetrating state. One end 2 of bush 26
A flange portion 28 is provided in a fixed state on the outer peripheral portion of 6a (on the front side of the fixed frame 1), and a groove portion 29 is formed in this flange portion 28 at two locations facing each other with the bush 26 interposed therebetween. There is. The end face of the one end portion 26a of the bush 26 and the collar portion 2
It is flush with the end face of No. 8. A slip prevention sheet 30 is interposed between the collar portion 28 and the fixed frame 11.

The other end of the bush 26 (on the rear side of the fixed frame 1) projects rearward from the fixed frame 11, and a male screw portion 31 is formed on the projected outer peripheral portion. The bush nut 32 is screwed. A washer 33 is interposed between the bush nut 32 and the fixed frame 11. In this case, bush 2
6 is fixed to the fixed frame 11 by tightening the bush nut 32 and sandwiching the fixed frame 11 by the bush nut 32 and the collar portion 28, and loosening the bush nut 32. The fixing is released so that the fixing frame 11 can be rotated.

Here, the face side fixing pin unit 14 is provided.
A procedure for attaching the to the fixed frame 11 will be described. The bush 26 is fixed in advance, for example, at its original position (angle 0 °) by tightening the bush nut 32. In this case, the rear end of the bush 26 projects slightly rearward from the bush nut 32 (see FIG. 7). In this state,
With the holder nut 19 of the face side fixing pin unit 14 removed, the tip of the holder 18 is fixed to the bush 26.
Is inserted from the front side of the fixed frame 11 and two adjacent recesses 24 of the four recesses 24 formed on the back side of the slide bar 20 are fitted into one end 26a of the bush 26, respectively. At the same time, the protrusion 23 is inserted into the bush 26 and the groove 29 (see FIG. 4).

Then, the holder nut 19 is attached to the holder 18
Then, the holder nut 19 is tightened until it abuts on the rear end of the bush 26. As a result, the slide bar 20 is fixed to the bush 26 and thus the fixed frame
It will be fixed at 1. In this case, the position of the slide bar 20 in the longitudinal direction (see arrow Y in FIGS. 1 and 4) with respect to the bush 26, and thus the fixed frame 11, is selected by appropriately selecting the recess 24 to be fitted into the one end portion 26a of the bush 26. Consequently, the fixing pin 22 for the fixed frame 11
The position of can be changed.

In this way, the face side fixing pin unit 1
When the bush nut 32 is loosened with 4 attached to the fixed frame 11, the bush 26 and the face side fixing pin unit 14 can be rotated in the arrow X direction about the holder 18 which is the shaft portion. become. Then, in this state, by re-tightening the bush nut 32, the bush 26, and by extension, the face side fixing pin unit 1
4 can be fixed in its pivot position.

Next, the occipital region side fixed pin unit 15 and its mounting structure will be described in detail. As shown in FIG. 12, the holder 34 of the occipital region side fixed pin unit 15 is set to have a shorter axial length than the holder 18 of the face side fixed pin unit 14 described above, and the insertion hole 34 of the holder 34 is provided.
The slide bar 20 is movably inserted in a. The configuration of the occipital region side fixing pin unit 15 is the same as that of the face side fixing pin unit 14 except for this point, and therefore, the same portions are denoted by the same reference numerals and the description thereof will be omitted.

Then, as shown in FIGS. 6 and 8, cylindrical bushes 35 of the same construction are attached to the two portions of the fixed frame 11 where the occipital region side fixed pin units 15 are attached. This bush 35
Is fixed in a state that it is inserted into a hole 36 formed in the fixed frame 11, and one end portion 35a on the front side of the fixed frame 11 is fixed.
The end face of is flush with the front surface of the fixed frame 11. The rear end of the bush 35 does not protrude from the back surface of the fixed frame 11. Grooves 37 are formed on the front side of the fixed frame 11 at two locations facing each other with the bush 35 interposed therebetween so as to be oriented substantially in the radial direction of the fixed frame 11.

Here, the occipital region side fixed pin unit 1 is provided.
A procedure for attaching 5 to the fixed frame 11 will be described. First, with the holder nut 19 of the occipital region side fixed pin unit 15 removed, the tip of the holder 34 is moved to the bush 35
Is inserted from the front side of the fixed frame 11 and two adjacent recesses 24 of the four recesses 24 formed on the back side of the slide bar 20 are fitted into one end 35a of the bush 35, respectively. At the same time, the protrusion 23 is inserted into the bush 35 and the groove 37 (see FIG. 5).

Then, the holder nut 19 is attached to the holder 34.
The holder nut 19 is fitted in the rear part and tightened until it comes into contact with the rear surface of the fixed frame 11 (see FIG. 5). As a result, the slide bar 20 is fixed to the bush 35 and thus the fixed frame 11. Also in this case, the position of the slide bar 20 in the longitudinal direction (see the arrow Y in FIGS. 1 and 5) with respect to the bush 35 and thus the fixed frame 11 is appropriately selected by appropriately selecting the recess 24 to be fitted into the one end portion 35a of the bush 35. Further, the position of the fixing pin 22 with respect to the fixed frame 11 can be changed. However, in this case, since the projection 23 of the slide bar 20 is in the state of being inserted into the groove 37 of the fixed frame 11, it is impossible to rotate the slide bar 20 around the holder 34 that is the shaft. Has been done.

When the head A of the patient is fixed in the above structure, first, the slides of the face side fixing pin unit 14 and the occipital side fixing pin unit 15 are adjusted according to the size of the head A. The position of the bar 20 (the position in the arrow Y direction along the longitudinal direction of the slide bar 20) is selected. After the position is determined, each holder bar nut 19 is tightened to fix each slide bar 20. Then, regarding the face side fixing pin unit 14, the fixing pin 22 is set at an appropriate position with respect to the head A (face side).
The position of the slide bar 20 in the arrow X direction is determined. At this time, the bush nut 32 is loosened, and the slide bar 2
0 is rotated together with the bush 26, and when the position is determined, the bush nut 32 is tightened to fix the bush 26 and the slide bar 20.

Then, with the head A of the patient who has been previously treated for pain relief arranged in the fixing frame 11, the fixing pin 2
2 is rotated by a tool not shown, and each fixing pin 22
The head A is fixed by puncturing the skull through the scalp at the tip of the head.

According to the above-described embodiment, when the head A is fixed, the fixing pin 22 of the occipital region side fixing pin unit 15 is fixed.
Does not rotate, so the head side fixed pin unit 15
The occipital region side can be reliably fixed by the fixing pin 22 and the fixing pin 22 of the face side fixing pin unit 14 can be rotationally adjusted in the arrow X direction around the holder 18, so that the fixing pin 22 The head A can be fixed easily and surely by adjusting the position to a position suitable for fixing.

Further, in the above-mentioned embodiment, when the fixing pin 22 of the face side fixing pin unit 14 is rotationally adjusted, it can be fixed and released by rotating the bush nut 32, so that it is necessary to use a tool such as a wrench. There is no advantage and there is an advantage that the operation is easy.

Further, since the slide bars 20 of the face-side and occipital-side fixed pin units 14 and 15 can be adjusted in position in three stages in the longitudinal direction thereof, first, according to the size of the head A, The approximate position of the fixing pin 22 is determined by adjusting the position of the slide bar 20, and thereafter, the fixing pin 22 is screwed back and forth to make a fine adjustment, whereby the head A
Can be more easily and surely fixed.

[0027]

As is apparent from the above description, according to the present invention, when the head is fixed, the fixing pin of the occipital region side fixing pin unit does not rotate, so that the fixing pin of the subsequent head side fixing pin unit. The occipital region can be securely fixed by the, and the fixing pin of the face-side fixing pin unit can be rotationally adjusted, so that the head can be easily and easily adjusted by adjusting the fixing pin to a position suitable for fixing. Can be securely fixed.

[Brief description of drawings]

FIG. 1 is an overall front view showing an embodiment of the present invention.

FIG. 2 is a right side view of the whole.

FIG. 3 is an overall plan view.

FIG. 4 is an enlarged sectional view taken along the line EE in FIG.

5 is an enlarged cross-sectional view taken along the line of FIG.

FIG. 6 is a perspective view of a fixed frame.

FIG. 7 is an enlarged sectional view taken along the line Har in FIG.

FIG. 8 is an enlarged cross-sectional view taken along the line II in FIG.

FIG. 9 is a side view of the face side fixing pin unit.

FIG. 10 is a plan view of the unit.

FIG. 11 is a front view of the unit.

FIG. 12 is a side view of the occipital region side fixed pin unit.

[Explanation of symbols]

11 is a fixed frame, 14 is a face side fixed pin unit, 15 is a occipital side fixed pin unit, 18 is a holder (shaft part), 1
9 is a holder nut, 20 is a slide bar, 21 is a support bar, 22 is a fixing pin, 24 is a recess, 26 is a bush,
32 is a bush nut, 34 is a holder, 35 is a bush, 37 is a groove, and A is a head.

Claims (1)

[Claims] 1. A fixed frame, and a plurality of fixed pin units attached to a plurality of positions of the fixed frame, each of which has a fixed pin for fixing a patient's head from its surroundings at its tip. In the skull fixing device, of the plurality of fixing pin units, a face side fixing pin unit for fixing the patient's head from the face side is rotationally adjusted about a shaft portion extending in the thickness direction of the fixing frame. The occipital region fixing pin unit for fixing the patient's head from the occipital region side has a constitution that enables the rotation adjustment to be impossible.