WO2022110315A1

WO2022110315A1 - Cranium grooving assisting tool

Info

Publication number: WO2022110315A1
Application number: PCT/CN2020/135355
Authority: WO
Inventors: 章海涛; 张磊; 高敏芳
Original assignee: 苏州景昱医疗器械有限公司
Priority date: 2020-11-30
Filing date: 2020-12-10
Publication date: 2022-06-02
Also published as: CN112617959A

Abstract

A cranium grooving assisting tool, comprising a cutting device (200) used for cutting a cranium (100) to be grooved, and further comprising a base (300) used for being fixed to the cranium (100) to be grooved and a moving support (400) fixed relative to the cutting device (200); the base (300) is provided with an annular guide portion (310), the moving support (400) is provided with a moving portion (410), and the moving portion (410) is movably connected to the annular guide portion (310) so as to guide the cutting device (200) to cut along a set cutting track. By providing the base (300) and the moving support (400), the cranium grooving assisting tool achieves the guiding of a cutting track of the cutting device (200); and the cranium grooving assisting tool has simple operation and high consistency, and can reduce skill requirements of operators.

Description

A cranial grooving auxiliary tool

technical field

The invention belongs to the field of medical technology, and in particular relates to an auxiliary tool for grooving a skull.

Background technique

Existing surgical tools for grooving skulls are mostly manual drilling and manual cutting of inaccurately shaped grooves. Often, the hole or slot is too small to place the product, and additional surgical tools are needed to expand it; or the hole or slot is too large, and the product is placed in too large a gap or even falls into it, which affects the sealing or even fixing of the product, etc. question. This requires a certain technical ability of the person who makes the slot or hole.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an auxiliary tool for grooving the skull, which is easy to operate, has high consistency, and can reduce the skill requirements of operators.

To achieve the above object, the present invention provides the following technical solutions: a skull slotting auxiliary tool, including a cutting device for cutting on the skull to be slotted, and a base for being fixed on the skull to be slotted and A movable bracket fixed relative to the cutting device, the base is provided with an annular guide portion, the movable bracket is provided with a movable portion, and the movable portion is movably connected to the annular guide portion to guide the cutting device Cut along the set cutting path.

Further, the cutting device is arranged on the outer side of the base and the outer edge of the bottom of the base overlaps with the set cutting track;

Or the base is an annular base, the cutting device is arranged on the inner side of the annular base, and the edge of the inner hole of the annular base overlaps with the set cutting track.

Further, the annular guide portion and the moving portion are mutually limited to limit the freedom of movement of the moving portion along the non-moving direction.

Further, the annular guide portion is a groove provided on the base, and the groove includes a first guide channel near the bottom of the groove and a second guide channel near the groove. The cross section of a guide channel is circular, the cross section of the second guide channel is rectangular, the dimension of the first guide channel in the width direction of the groove is larger than that of the second guide channel, and the moving part It is a sliding member provided at one end of the moving bracket, and the sliding member includes a spherical body slidably connected to the first guide channel, a straight rod portion slidably connected to the second guide channel, and a slidably attached to the the flat portion of the base surface.

Further, the annular guide portion is provided with a missing portion or a detachable portion that forms a missing portion after disassembly, so that the moving portion can be separated from the annular guide portion from the missing portion.

Further, the annular guide portion is a groove provided on the base, the moving portion is a sliding member, and the groove wall of the groove is provided with at least one opening to allow the sliding member to move from the The opening moves into or out of the groove.

Further, the annular guide portion is arranged on the top of the base, the moving portion is arranged on the lower end of the moving bracket, and the upper end of the moving bracket is relatively fixed to the cutting device.

Further, the side surface of the base is further provided with a guide surface, and the blade surface of the cutting device moves along the guide surface.

Further, the moving track of the blade face of the cutting device forms a conical surface, and the radial dimension of the upper end of the conical surface is larger than the radial dimension of the lower end of the conical surface.

Further, the movable bracket includes a first bracket segment in the shape of a lower bow arm and a second bracket segment in a straight shape, the moving part is provided at the lower end of the first bracket segment, and the second bracket segment Connected to the upper end of the first bracket segment and located at the bow and arrow position, the cutting device is relatively fixed to the second bracket segment and located at the bowstring position.

Further, the cutting device is connected to the moving bracket in a position adjustable along the depth direction of the blade or the cutting device is connected to the moving bracket in a floating direction along the depth direction of the blade.

Further, the base is an integral structure or the base includes a base and an upper cover that are arranged separately, the bottom of the base is integrally attached to the skull to be slotted, or the bottom of the base is partially attached to the to-be-slotted skull. On the slotted skull, the base is fixed on the skull to be slotted by a bone nail or the base is pasted on the skull to be slotted, and the cutting device is an ultrasonic bone cutter or a milling cutter.

Due to the application of the above-mentioned technical solutions, the present invention has the following advantages compared with the prior art:

1) The skull slotting auxiliary tool disclosed in the present invention can guide the cutting trajectory of the cutting device by setting the base and the moving mechanism, the auxiliary tool is simple to operate, has high consistency, and can reduce the skill requirements of operators;

2) The skull slotting auxiliary tool disclosed in the present invention can ensure that the cutting trajectory does not shift and the cutting position is more accurate by restricting the freedom of movement of the moving part along the non-moving direction;

3) The skull slotting auxiliary tool disclosed by the present invention can realize the quick disassembly and assembly of the moving part and the annular guide part by setting the missing part or the detachable part;

4) In the skull slotting auxiliary tool disclosed in the present invention, the annular guide portion is arranged on the top of the base, the moving portion is arranged at the lower end of the moving support, the upper end of the moving support is relatively fixed with the cutting device, and the entire cutting device has a more stable structure;

5) In the skull slotting auxiliary tool disclosed by the present invention, a guide surface is also provided on the side of the base, the cutting device includes a blade body and a blade arranged up and down, the moving bracket is relatively fixed with the blade body, the blade blade surface moves along the guide surface, and the cutting device moves more. Stablize;

6) In the skull slotting auxiliary tool disclosed in the present invention, the movable bracket includes a first bracket section in the shape of a lower bow arm and a second bracket section in a straight shape, the movable part is arranged at the lower end of the first bracket section, and the second bracket The segment is connected to the upper end of the first bracket segment and is located at the bow and arrow position, the cutting device is relatively fixed with the second bracket segment and is located at the bowstring position, and the entire cutting device structure is more stable;

7) The skull slotting auxiliary tool disclosed by the present invention, the cutting device comprises a cutter, the annular trajectory of the cutter face forms a cone, the radial dimension of the upper end of the cone is larger than the radial dimension of the lower end, which is convenient for placing the pacemaker and making pacing. The device cannot be dropped into the hole;

8) In the skull slotting auxiliary tool disclosed in the present invention, the cutting device can be lifted and lowered along the direction close to or away from the skull to be slotted and connected to the moving support, which can meet different slotting depth requirements;

9) The skull slotting auxiliary tool disclosed in the present invention, the cutting device can be floated and connected to the mobile support along the direction close to or away from the skull to be slotted, which is suitable for the need for no strict control of the depth direction during slotting, such as applying pressure. The need for continuous and repetitive operations to make the knife touch the skull for cutting, and then lift the knife away from the skull.

Description of drawings

Fig. 1 is the top view of the skull slotting auxiliary tool in the first embodiment of the present invention;

2 is a front cross-sectional view of a skull slotting auxiliary tool in Embodiment 1 of the present invention;

3 is a schematic diagram of the connection between a cutting device of a skull slotting auxiliary tool and a moving bracket according to an embodiment of the present invention;

Fig. 4 is the top view of the skull slotting auxiliary tool in the second embodiment of the present invention;

Fig. 5 is the front sectional view of the skull slotting auxiliary tool in the second embodiment of the present invention;

6 is a schematic diagram of the connection between the cutting device and the moving bracket of the skull slotting auxiliary tool in Embodiment 3 of the present invention;

7 is a schematic diagram of the connection between the cutting device and the moving bracket of the skull slotting auxiliary tool in Embodiment 4 of the present invention;

8 is a schematic diagram of the connection between the cutting device and the moving bracket of the skull slotting auxiliary tool in the fifth embodiment of the present invention.

Detailed ways

The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. The following is a preferred embodiment for illustrating the present invention, but not for limiting the scope of the present invention.

Referring to FIGS. 1 to 3 , as shown in the legends therein, an auxiliary tool for grooving a skull includes a cutting device 200 for cutting on the skull 100 to be grooved, and also includes a cutting device 200 for fixing on the skull 100 to be grooved The base 300 and the movable bracket 400 fixed relative to the cutting device 200, the base 300 is provided with an annular guide portion 310, the movable bracket 400 is provided with a movable portion 410, and the movable portion 410 is movably connected to the annular guide portion 310 for guiding The cutting device 200 cuts along the set cutting trajectory.

In a preferred implementation in this embodiment, the cutting device 200 is disposed on the outer side of the base 300 and the outer edge of the bottom of the base 300 overlaps with the above-mentioned set cutting track.

In a preferred implementation in this embodiment, the annular guide portion 310 is a groove provided on the base 300 , and the groove includes a first guide channel 311 near the bottom of the groove and a second guide channel 312 near the groove. , the cross section of the first guide channel 311 is circular, the cross section of the second guide channel 312 is rectangular, the size of the groove width direction of the first guide channel 311 is larger than that of the second guide channel 312, and the moving part 410 is A sliding member connected to one end of the moving bracket 400 , the sliding member includes a spherical body 411 slidably connected to the first guide channel 311 , a straight rod portion 412 slidably connected to the second guide channel 312 , and slidingly attached to the surface of the base 300 the flat plate portion 413. The sliding part has a structure that restricts the degree of freedom, reducing user operation. The structure of the sliding part and the groove can be spherical, with multiple degrees of freedom, or a square slider, connecting rod or other structures, which can limit the local degrees of freedom .

In a preferred implementation in this embodiment, the annular guide portion 310 is a groove provided on the base 300 , the moving portion 410 is a sliding member, and at least one opening 313 is formed on the groove wall of the groove to allow the sliding member to pass through the opening 313 Move in or out of the groove. The base has openings for movement in and out of the sliding member with the cutting device. There can be one or more. The opening and the chute can be on the same arc surface or different arc surfaces. The opening direction can make the sliding part of the cutting device enter and exit from the movement direction, and can also enter and exit from the opposite direction of movement.

In a preferred implementation in this embodiment, the annular guide portion 310 is arranged on the top of the base 300 , the moving portion 410 is arranged at the lower end of the moving bracket 400 , and the upper end of the moving bracket 400 is relatively fixed to the cutting device 200 .

In a preferred implementation in this embodiment, a guide surface 320 is further provided on the side of the base 300 , and the blade surface of the blade 210 of the cutting device 200 moves along the guide surface 320 .

In a preferred implementation in this embodiment, the base 300 includes a base 301 and an upper cover 302 which are arranged separately. In other embodiments, the base may also be an integral structure.

In a preferred implementation in this embodiment, the bottom of the base 300 is integrally fitted on the skull 100 to be slotted. The bottom of the base is curved, which fits with the curvature of the skull, which is convenient for surgical operations. In other embodiments, it can also be: supported by several support points and fixed on the skull.

In the preferred implementation of this embodiment, the base 300 is pasted on the skull 1001 to be slotted. In other embodiments, the base can also be fixed on the skull by screws.

In a preferred implementation in this embodiment, the movable bracket 400 includes a first bracket segment 420 in the shape of a lower bow arm and a second bracket segment 430 in a straight shape. The movable portion 410 is provided at the lower end of the first bracket segment 420. The two bracket segments 430 are connected to the upper end of the first bracket segment 420 and are located at the bow and arrow position, and the cutting device 200 is relatively fixed to the second bracket segment 430 and located at the bow string position.

In a preferred implementation in this embodiment, the moving track of the blade surface of the blade 210 of the cutting device 200 forms a conical surface, and the radial dimension of the upper end of the conical surface is larger than the radial dimension of the lower end thereof. Facilitates placement of the pacemaker and prevents the pacemaker from falling into the hole. In other embodiments, the movement track of the blade face of the cutting device may form a cylindrical surface.

In a preferred implementation in this embodiment, the cutting device 200 is an ultrasonic bone cutter or a milling cutter.

In a preferred implementation in this embodiment, the cutting device 200 and the moving bracket 400 can move relative to each other in a precise distance along the axial direction. The cutting device 200 is provided with a first positioning column 220, and the first positioning column 220 is provided with an external thread structure. 400 is provided with a first positioning hole, the first positioning hole is provided with an internal thread structure, and the external thread structure is threadedly connected with the internal thread structure so that the cutting device 200 can be connected to the moving bracket 400 in an adjustable position in the depth direction of the blade of the cutting device. There is a scale on the body of the cutting device, and the feed depth can be adjusted according to the number of thread rotations, so as to achieve multiple feed depth requirements or high-precision arbitrary feed depth requirements.

The working process of this embodiment is described below, including the following steps:

1) Fix the base on the skull to be slotted, and assemble the moving part of the moving bracket with the annular guide part of the base;

2) Adjust the depth of the cutting device;

3) Push the cutting device to cut along the set cutting track;

4) After slotting, remove the mobile bracket from the base and remove the base from the skull to be slotted.

Embodiment 2

Referring to FIGS. 4 to 5 , as shown in the legends, the rest is the same as that of the first embodiment, the difference is that the base 300 is a ring base, the cutting device 200 is arranged on the inner side of the ring base, and the inner side of the ring base The hole edge overlaps with the above set cutting trajectory.

Embodiment 3

Referring to FIG. 6 , as shown in the legend, the rest is the same as that of the first embodiment, the difference is that the cutting device 200 and the moving bracket 400 can move relative to each other along the axial direction at a fixed distance, and the cutting device 200 is provided with a second positioning column 230 , the moving bracket 400 is provided with a second positioning hole, and the second positioning column 230 is penetrated in the second positioning hole. The two positioning holes are provided with buckles (plastic barb clips). In other embodiments, the second positioning column and the second positioning holes are both provided with pin holes, and the number of pin holes in one of them is arranged in sequence along the axial direction. multiple. Design grooves or clips with different depths at the interface according to the surgical requirements, which can achieve quantitative feeding requirements.

Embodiment 4

Referring to FIG. 7 , as shown in the legend, the rest is the same as that of the first embodiment, the difference is that the cutting device 200 and the moving bracket 400 are fixed together in an axially immovable manner, and the cutting device 200 is provided with a third positioning column 240, the outer wall of the third positioning column 240 is provided with a threaded hole, the mobile bracket 400 is provided with a third positioning hole, the side wall of the third positioning hole is provided with a through hole, and the third positioning column and the third positioning hole are passed through the threaded hole. It is fixedly connected with the screw 510 of the through hole. After adjusting the required depth, it forms a tight connection with the cutting device, which is suitable for one-time slotting requirements.

Embodiment 5

Referring to FIG. 8 , as shown in the legend, the rest is the same as that of the first embodiment, the difference is that in the cutting device 200 and the moving bracket 400 , the cutting device 200 is provided with a limit guide post 250 , and the moving bracket 400 is provided with a limit guide hole , the limit guide post 250 and the limit guide hole are mutually limited to restrict the two from being separated from each other in the axial direction. It is suitable for the need for no strict control of the depth direction during the grooving process, such as applying pressure to make the knife contact the skull for cutting, and then lifting the knife away from the skull for continuous and repetitive operations.

The above is a description of the embodiments of the present invention. The above description of the disclosed embodiments enables those skilled in the art to realize or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

A skull slotting auxiliary tool, comprising a cutting device for cutting on the skull to be slotted, characterized in that it also includes a base for being fixed on the skull to be slotted and a relatively fixed relative to the cutting device. A moving bracket, the base is provided with an annular guide portion, the moving bracket is provided with a moving portion, and the moving portion is movably connected to the annular guide portion to guide the cutting device to cut along a set cutting track.
The cranial grooving auxiliary tool according to claim 1, wherein the cutting device is arranged on the outer side of the base and the outer side of the bottom of the base overlaps with the set cutting track;

Or the base is an annular base, the cutting device is arranged on the inner side of the annular base, and the edge of the inner hole of the annular base overlaps with the set cutting track.
The cranial grooving auxiliary tool according to claim 1, wherein the annular guide portion and the moving portion are mutually limited to limit the freedom of movement of the moving portion in the non-moving direction.
The cranial grooving auxiliary tool according to claim 3, wherein the annular guide portion is a groove provided on the base, and the groove comprises a first guide channel near the bottom of the groove and a groove. A second guide channel close to its notch position, the cross section of the first guide channel is circular, the cross section of the second guide channel is rectangular, and the size of the first guide channel in the groove width direction is larger than that of the The dimension in the groove width direction of the second guide channel, the moving part is a sliding member provided at one end of the moving bracket, and the sliding member includes a spherical body slidably connected to the first guide channel and slidably connected to the The straight rod portion in the second guide channel and the flat plate portion slidably attached to the surface of the base.
The cranial grooving aid according to claim 3, wherein the annular guide portion is provided with a missing portion or a detachable portion that forms a missing portion after disassembly, so that the moving portion can be separated from the missing portion from the missing portion. Ring guide.
The skull slotting auxiliary tool according to claim 5, wherein the annular guide part is a groove provided on the base, the moving part is a sliding part, and the groove wall of the groove is a groove. At least one opening is provided to allow the sliding member to move into or out of the groove from the opening.
The skull slotting auxiliary tool according to claim 1, wherein the annular guide portion is arranged on the top of the base, the moving portion is arranged at the lower end of the moving bracket, and the upper end of the moving bracket is connected to the upper end of the moving bracket. The cutting device is relatively fixed.
The auxiliary tool for grooving skull according to claim 7, characterized in that, the side surface of the base is further provided with a guide surface, and the blade surface of the cutting device moves along the guide surface.
The auxiliary tool for grooving skull according to claim 1, wherein the moving track of the blade surface of the cutting device forms a conical surface, and the radial dimension of the upper end of the conical surface is larger than the radial dimension of the lower end of the conical surface .
The cranial grooving auxiliary tool according to claim 1, wherein the movable bracket comprises a first bracket section in the shape of a lower bow arm and a second bracket section in a straight shape, and the movable part is provided on the The lower end of the first bracket segment, the second bracket segment is connected to the upper end of the first bracket segment and is located at the bow and arrow position, and the cutting device is relatively fixed to the second bracket segment and is located at the bowstring position.
The cranial grooving auxiliary tool according to claim 1, wherein the cutting device is connected to the movable bracket in a position adjustable along the depth direction of the blade or the cutting device can be floated along the depth direction of the blade. connected to the mobile support.
The skull slotting auxiliary tool according to claim 1, wherein the base is an integral structure or the base comprises a base and an upper cover that are arranged separately, and the bottom of the base is integrally fitted to the to-be-opened base. The slotted skull or the bottom of the base is partially attached to the skull to be slotted, the base is fixed on the skull to be slotted by a bone nail, or the base is pasted on the skull to be slotted, and the cutting device For ultrasonic bone cutter or milling cutter.