CN113598872A

CN113598872A - Skull slotting tool

Info

Publication number: CN113598872A
Application number: CN202111031932.9A
Authority: CN
Inventors: 姜传江; 章海涛; 吴国良
Original assignee: Sceneray Co Ltd
Current assignee: Jingyu Medical Technology Suzhou Co ltd
Priority date: 2021-09-03
Filing date: 2021-09-03
Publication date: 2021-11-05
Anticipated expiration: 2041-09-03
Also published as: WO2023029918A1; CN113598872B

Abstract

The invention belongs to the technical field of medical instruments and discloses a skull slotting tool which comprises a cutter for cutting a skull, a base, a fixing part and a profile groove, wherein the fixing part is arranged on the base, the fixing part can be connected to the skull and fixes the base to the skull, the profile groove is arranged on the base, the profile groove extends along a preset path, the cutter can extend into the profile groove and is abutted against the skull with the profile groove exposed, and the profile groove can guide the cutter extending into the profile groove to cut the skull along the preset path. According to the invention, the fixing part and the profile groove are arranged on the base, so that the fixing part can fix the base, the cutter can extend into the profile groove and abut against the skull, and the profile groove can guide the cutter extending into the profile groove to cut the skull along the preset direction, so that the incision is smooth, the size of the incision can be strictly controlled, the operation time is shortened, the operation efficiency is improved, and the operation risk is reduced.

Description

Skull slotting tool

Technical Field

The invention relates to the technical field of medical instruments, in particular to a skull slotting tool.

Background

An implantable neurostimulator is a method for stimulating target nerves with a certain degree of current pulses to adjust or restore brain, nerve or muscle function, and relieving symptoms.

In the process of implanting the nerve stimulator in the brain, a groove needs to be formed in the skull so that the nerve stimulator can be placed in the brain, in the existing craniotomy process, generally, a doctor firstly manually lines the skull, firstly manually drills along a contour line, and then uses a cutter to cut a part between two adjacent holes so as to cut out a groove with a very precise shape, because the surface of the cut after drilling is rough and the area of the cut can be too small or too large, when the cut is too small, an additional tool is needed to expand the cut; when the incision is too large, the gap between the pulse generator and the incision is too large, which is not beneficial to fixing and sealing the pulse generator, thereby prolonging the operation time and increasing the operation risk.

Therefore, it is desirable to provide a tool for craniotomy to solve the above problems.

Disclosure of Invention

The invention aims to provide a skull grooving tool to solve the problems that the surface of a cut is rough and the contour of the cut is not matched in the skull grooving process.

In order to achieve the purpose, the invention adopts the following technical scheme:

a skull grooving tool comprising a cutter for cutting a skull, the skull grooving tool further comprising:

a base;

a fixing part provided on the base, the fixing part being capable of being attached to the skull and fixing the base to the skull; and

the profile groove is arranged on the base, the profile groove extends along a preset path, the cutter can extend into the profile groove and is abutted against the skull exposed out of the profile groove, and the profile groove can guide the cutter extending into the profile groove to cut the skull along the preset path.

Preferably, the base includes:

an inner ring body and an outer ring body, wherein the inner ring body is arranged in the inner ring of the outer ring body, and the outer side wall of the inner ring body is arranged opposite to the inner side wall of the outer ring body so as to form the profiling groove; and

the inner ring body and the outer ring body are connected to the connecting body.

Preferably, the fixing portion is provided on the outer ring body.

Preferably, the fixing portion is provided on the inner ring body.

Preferably, the connecting body includes a first connecting portion, and the first connecting portion is disposed in the contour groove.

Preferably, the connector further includes a second connecting portion provided on the inner ring body, and the second connecting portion can communicate with an inner side surface of the inner ring body.

Preferably, the second connecting part is provided with a prepared hole, and the prepared hole can expose part of the skull.

Preferably, the end surfaces of the base, which are opposite to and away from the skull, extend in an arc shape along a first direction, and the first direction is the width direction of the skull.

Preferably, the fixing portion includes:

the pair of fixed hole groups are oppositely arranged on the outer ring body, and one fixed hole group comprises two fixed holes which are arranged at intervals;

the four mounting holes are respectively arranged at the bottoms of the four fixing holes and extend to one surface of the base, which is opposite to the skull;

the four pins are respectively arranged in the four fixing holes, the pins can penetrate through and extend out of the mounting holes, and the parts of the pins extending out of the mounting holes are provided with threads and can be abutted to the skull.

Preferably, a boss is arranged on a part, located at the edge of the mounting hole, of one surface, facing the skull, of the base, each of the four bosses can abut against the skull, and the mounting hole extends to an end surface, abutting against the skull, of each boss.

Preferably, the base comprises four connecting bodies, and the four connecting bodies are arranged in the profiling groove and are respectively close to the four fixing holes.

Preferably, the pin is made of a titanium alloy.

Preferably, the preset path is a quadrangle or a circle, and the vertex angle of the quadrangle is transited by an arc.

Preferably, the knife is an ultrasonic osteotome.

The invention has the beneficial effects that: through set up fixed part and profile groove on the base, make the fixed part can the fixed baseplate, make the cutter can stretch into the profile groove and with skull butt to the profile groove can guide the cutter that stretches into in the profile groove along predetermineeing the direction cutting skull, make the incision level and smooth, and can the size of close check incision, make incision profile and impulse generator's installation size match, shortened operating time, improved the efficiency of operation, and reduced the operation risk.

Drawings

FIG. 1 is a schematic structural diagram of a skull grooving tool according to an embodiment of the present invention;

FIG. 2 is a front view of the skull grooving tool of FIG. 1;

FIG. 3 is a left side view of the skull grooving tool of FIG. 1;

FIG. 4 is a cross-sectional view A-A of FIG. 3;

FIG. 5 is a cross-sectional view B-B of FIG. 3;

FIG. 6 is a cross-sectional view C-C of FIG. 5;

FIG. 7 is a schematic structural view of a skull grooving tool with a cutter removed according to a second embodiment of the present invention;

FIG. 8 is a top view of FIG. 7;

fig. 9 is a cross-sectional view D-D of fig. 8.

In the figure:

1. a cutter;

2. a base; 21. an inner ring body; 22. an outer ring body; 23. a linker; 231. a first connection portion; 232. a second connecting portion; 2321. reserving a hole;

3. profiling grooves;

4. a fixed part; 41. a fixing hole; 42. mounting holes; 43. a pin; 44. and (4) a boss.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example one

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

In the prior art of placing a pulse generator in the brain, the skull is first grooved and most physicians cut a groove of approximate shape by manually scoring the skull, then manually drilling a hole along the contour, and then using a cutter to cut the portion between two adjacent holes. Because the surface of the cut after drilling is rough and the area of the cut can be too small or too large, when the cut is too small, an additional tool is needed to expand the cut; when the incision is too big, the clearance of impulse generator and incision is too big, is unfavorable for impulse generator's fixed and sealed, not only increases between the operation to operation risk has been increased.

In order to solve the above problems, the present embodiment provides a skull grooving tool, as shown in fig. 1 to 6, which includes a cutter 1 for cutting a skull, a base 2, a contour groove 3, and a fixing portion 4, the contour groove 3 being provided on the base 2, the contour groove 3 extending along a preset path, the preset path being related to the installation dimension of the pulse generator. In particular, the preset path is related to the profile of the pulse generator, the installation gap, and the reserved installation position. The cutter 1 can extend into the contour groove 3 and can abut against the skull bone with the contour groove 3 exposed, and the contour groove 3 limits the cutter 1 so that the cutter 1 can cut the skull bone along the preset path of the contour groove 3. The fixing part 4 is arranged on the base 2, the fixing part 4 can be connected to the skull, and the base 2 is fixed to the skull, so that the cutter 1 is prevented from driving the base 2 to move in the cutting process.

Further, in the present embodiment, the base 2 includes an inner ring 21, an outer ring 22 and a connecting body 23, the inner ring 21 is disposed in the inner ring of the outer ring 22, the outer sidewall of the inner ring 21 is disposed opposite to the inner sidewall of the outer ring 22 to form the contour groove 3, both the inner ring 21 and the outer ring 22 are connected to the connecting body 23, and the inner ring of the inner ring 21 can expose a portion of the skull, thereby facilitating the observation of the incision during the cutting process.

Further, in order to reduce the volume of the base 2 and to firmly connect the inner ring 21 and the outer ring 22, in the present embodiment, the connecting body 23 is disposed in the contour groove 3, the outer sidewall of the inner ring 21 and the inner sidewall of the outer ring 22 are both connected to the connecting body 23, and the fixing portion 4 is disposed on the outer ring 22 and close to the connecting body 23, so as to enhance the connection strength between the inner ring 21 and the fixing portion 4 and prevent the inner ring 21 from being deformed when the cutter 1 abuts against the inner ring 21.

Because the skull has certain radian in its width direction, for the convenience of doctor's judgement cutter 1's incision depth, preferably, the terminal surface that base 2 is relative with the skull and deviate from mutually all is the arc along first direction and extends, and first direction is the width direction of skull for the one side of base 2 and skull contact can roughly be laminated with the skull, and the doctor can judge the incision of cutter 1 according to the length of the part that the handle of a knife of cutter 1 exposes base 2, thereby the doctor's operation of being convenient for, the efficiency of opening the cranium has been improved.

Specifically, in this embodiment, the preset path is a quadrangle, four vertex angles of the quadrangle are transited by arcs, the fixing portion 4 includes a pair of fixing hole groups, four mounting holes 42 and four pins 43, each fixing hole group includes two fixing holes 41, the two fixing holes 41 are arranged at intervals, the two fixing hole groups are respectively arranged on a pair of longer edges of the outer ring body 22, and the pair of fixing hole groups are arranged oppositely, so that the four fixing holes 41 are arranged oppositely in pairs. Four mounting holes 42 are respectively arranged at the bottoms of the four fixing holes 41, the mounting holes 42 extend to the surface of the base 2 opposite to the skull, four pins 43 are respectively arranged in the four fixing holes 41, the pins 43 can pass through and extend out of the mounting holes 42, the parts of the pins 43 extending out of the mounting holes 42 are provided with threads and can be abutted against the skull, when a doctor uses the skull bone fixing device, according to the positions of incisions, four points are firstly selected, the four pins 43 in the four fixing holes 41 are respectively nailed into the four points, so that the four pins 43 press and fix the outer ring body 22 on the skull, and the base 2 is fixed, preferably, the pins 43 are made of titanium alloy.

After cutting the skull of the lower head, the pulse generator needs to be fixed on the remaining skull of the head of the patient, and since four positioning holes have been opened on the skull by the four pins 43, in order to reduce the trauma to the patient, in the present embodiment, a pair of fixing hole groups of the fixing part 4 can also fix the pulse generator, that is, four positioning holes opened by the four pins 43 correspond to four mounting holes of the fixing hole group of the pulse generator one by one, so that it is not necessary to open a new positioning hole for fixing the pulse generator again, and the trauma of the patient is reduced.

Further, as the radian of the skull of each patient is different, in order to facilitate the base 2 to be firmly fixed with the skull, the fixing part 4 further comprises bosses 44, the bosses 44 are arranged on the part of one surface of the base 2 facing the skull, which is positioned at the edge of the mounting hole 42, all four bosses 44 can be abutted against the skull, the mounting hole 42 extends to the end surface of the boss 44 abutted against the skull, the four pins 43 can enable the four bosses 44 to be abutted against the outer surface of the skull, so as to firmly fix the base 2 on the outer surface of the skull,

with the above structure, in order to firmly connect the inner ring 21 to the outer ring 22, preferably, the base 2 includes four connecting bodies 23, and the four connecting bodies 23 are disposed on the predetermined path and respectively close to the four fixing holes 41, so as to ensure the connection strength between the inner ring 21 and the fixing portion 4 when the volume of the connecting body 23 is minimum, and prevent the inner ring 21 from deforming when the cutter 1 abuts against the inner ring 21.

Further, in order to prevent the cut skull from falling off and to facilitate the removal of the cut skull, the inner side wall of the base 2 in the contour groove 3 is obliquely disposed, and the area of the cross section of the contour groove 3 is gradually reduced in the direction in which the cutter 1 protrudes into the contour groove 3.

Specifically, in the present embodiment, the outer side surface of the inner ring body 21 and the inner side surface of the outer ring body 22 are both obliquely arranged, and the profile of the cross section of the outer side surface of the inner ring body 21 and the profile of the cross section of the inner side surface of the outer ring body 22 are both gradually reduced in the direction in which the cutter 1 extends into the contour groove 3, so that an inverted cone is formed on the cut, and thus when the skull is cut off, the cut part of the skull may abut against the cut part of the skull, which not only prevents the cut part of the skull from falling off, but also facilitates the removal of the cut part of the skull.

The ultrasonic osteotome converts electric energy into mechanical energy by using a high-intensity focused ultrasound technology and a transducer, and water in contacted tissue cells is vaporized and protein hydrogen bonds are broken by high-frequency ultrasonic oscillation, so that bone tissues needing to be cut in an operation are thoroughly destroyed. In use, the temperature of the ultrasonic osteotome tip is less than 38 ℃ and the ambient propagation distance is less than 200 microns. Because the high-intensity focused ultrasonic waves only have a destructive effect on bone tissues with specific hardness, blood vessels and nerve tissues cannot be damaged, the high-intensity focused ultrasonic waves also have a hemostatic effect on an operation wound, the wound of a minimally invasive operation is further reduced, and the accuracy, reliability and safety of the operation are greatly improved. Further, in the present embodiment, the cutter 1 is an ultrasonic osteotome.

Example two

In the first embodiment, the four positioning holes formed by the four pins 43 correspond to the four mounting holes of the fixed hole group of the pulse generator one to one, so that the requirement on the size precision of the positioning holes formed by the four self-tapping pins 43 is high, and because the skull of the head of a person is hard, in the forming process, the four positioning holes formed by the four pins 43 can have errors with the fixed hole group of the pulse generator, so that the pulse generator cannot be fixed, and a larger wound is brought to a patient.

In order to solve the above problem, in the present embodiment, the fixing portion 4 is disposed on the inner ring 21 to dispose the positioning hole, which needs to be opened, on the skull bone, which needs to be cut, thereby reducing the trauma of the patient.

Specifically, as shown in fig. 7 to 9, in the present embodiment, four fixing holes 41 are provided on the inner ring 21, the four fixing holes 41 are respectively close to four corners of the inner ring 21, four mounting holes 42 are respectively provided at bottoms of the four fixing holes 41, the mounting holes 42 extend to a face of the base 2 opposite to the skull bone, four pins 43 are respectively provided in the four fixing holes 41, the pins 43 can pass through and protrude from the mounting holes 42, and the part of the pin 43 that protrudes out of the mounting hole 42 is threaded and can abut against the skull, when the surgeon is using it, four points are first selected according to the positions of the notches, and four pins 43 positioned in the four fixing holes 41 are respectively driven into the four points, so that the four pins 43 press and fix the inner ring 21 on the skull, and the four holes self-tapped by the four pins 43 fall on the skull to be cut, thereby reducing the trauma of the patient.

Since the connecting body 23 will inevitably break a part of the contour groove 3, the skull will not have a continuous incision after the cutter 1 cuts along the predetermined path of the contour groove 3, and at this time, the base 2 needs to be removed, and then the cutter 1 is used to continue cutting along the incision to form a closed incision, so that a part of the skull is cut off.

Because cutter 1 is in the cutting process, cutter 1 can support and press on the lateral wall of interior ring 21 and the inside wall of outer ring 22, in order to avoid interior ring 21 to be supported and pressed the deformation, in this embodiment, connecting body 23 includes first connecting portion 231 and second connecting portion 232, first connecting portion 231 sets up in the profile modeling groove 3, first connecting portion 231 communicates the lateral wall of interior ring 21 and the inside wall of outer ring 22, second connecting portion 232 sets up on the inside wall of interior ring 21, and can communicate the inside wall of interior ring 21, the structural strength of interior ring 21 has been strengthened, thereby can reduce the deformation of interior ring 21.

Preferably, in this embodiment, the second connecting portion 232 is cross-shaped, and the second connecting portion 232 can respectively communicate with two pairs of opposite corners of the inner ring 21, and the four fixing holes 41 are respectively disposed on four opposite corners of the inner ring 21 and located at the connection position of the inner ring 21 and the second connecting portion 232, so as to enhance the structural strength of the inner ring 21, and enhance the structural strength between the fixing portion 4 and the base 2, so that the base 2 can be more stably fixed on the skull.

Because the cutting volume of cutter 1 cutting skull is more for notched clearance is great, even with the inside wall slope setting that base 2 is located the profile modeling groove 3, and the area of the cross section of profile modeling groove 3 reduces along cutter 1 in stretching into the direction of profile modeling groove 3 gradually, and the skull after cuting off can't support and press in incision department, and still can drop. In order to solve the above problem, in this embodiment, a prepared hole 2321 is further provided on the base 2, the prepared hole 2321 is provided on the second connecting portion 232 and is located at the center of the preset contour, a medical worker may open a connecting hole on the skull exposed from the prepared hole 2321 and connect to the connecting hole through other tools, and when the medical worker uses the cutter 1 to cut the remaining breaking point to form a closed incision, the medical worker may first connect to the skull to be cut off by using other tools, so as to facilitate taking out the skull, and can prevent the cut skull from falling into the incision.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A skull grooving tool comprising a cutter (1) for cutting a skull, characterized in that the skull grooving tool further comprises:

a base (2);

a fixation portion (4) arranged on the base (2), the fixation portion (4) being attachable to the skull and fixing the base (2) to the skull; and

the skull bone cutting device comprises a contour groove (3), wherein the contour groove (3) is formed in the base (2), the contour groove (3) extends along a preset path, the cutter (1) can stretch into the contour groove (3) and is abutted to the skull bone exposed out of the contour groove (3), and the contour groove (3) can guide the cutter (1) stretching into the contour groove (3) to cut the skull bone along the preset path.

2. Skull grooving tool according to claim 1, wherein the base (2) comprises:

an inner ring body (21) and an outer ring body (22), wherein the inner ring body (21) is arranged in the inner ring of the outer ring body (22), and the outer side wall of the inner ring body (21) is arranged opposite to the inner side wall of the outer ring body (22) to form the profiling groove (3); and

a connecting body (23), wherein the inner ring body (21) and the outer ring body (22) are both connected to the connecting body (23).

3. Skull grooving tool according to claim 2, wherein the fixation part (4) is provided on the outer ring (22).

4. Skull grooving tool according to claim 2, wherein the fixation part (4) is arranged on the inner ring (21).

5. Skull grooving tool according to claim 2, wherein the connecting body (23) comprises a first connecting portion (231), the first connecting portion (231) being arranged within the contour groove (3).

6. The skull grooving tool according to claim 5, wherein the connecting body (23) further comprises a second connecting portion (232), the second connecting portion (232) being provided on the inner ring (21), the second connecting portion (232) being capable of communicating with an inner side surface of the inner ring (21).

7. The skull grooving tool of claim 6, wherein the second coupling portion (232) is provided with a prepared hole (2321), and the prepared hole (2321) can expose a portion of the skull.

8. Skull grooving tool according to claim 2, wherein the end surfaces of the base (2) opposite and facing away from the skull each extend in an arc along a first direction, the first direction being the width direction of the skull.

9. Skull grooving tool according to claim 2, wherein the fixation part (4) comprises:

a pair of fixing hole groups oppositely arranged on the outer ring body (22), wherein one fixing hole group comprises two fixing holes (41) arranged at intervals;

four mounting holes (42) are respectively arranged at the bottoms of the four fixing holes (41), and the mounting holes (42) extend to the surface, opposite to the skull, of the base (2);

four pins (43) respectively arranged in the four fixing holes (41), wherein the pins (43) can pass through and protrude out of the mounting holes (42), and the parts of the pins (43) protruding out of the mounting holes (42) are provided with threads and can be abutted with the skull.

10. Skull grooving tool according to claim 9, wherein the base (2) is provided with bosses (44) on the side facing the skull at the edge of the mounting hole (42), four of the bosses (44) each being capable of abutting the skull, the mounting hole (42) extending to the end face where the bosses (44) abut the skull.

11. Skull grooving tool according to claim 9, characterized in that the base (2) comprises four connecting bodies (23), the four connecting bodies (23) each being arranged in the contour groove (3) and being adjacent to four fixation holes (41), respectively.

12. Skull grooving tool according to claim 9, wherein the pin (43) is made of a titanium alloy.

13. The skull grooving tool of any one of claims 1-12, wherein the predetermined path is a quadrilateral or a circle, the vertex of the quadrilateral transitioning with a circular arc.

14. Skull grooving tool according to any one of claims 1-12, wherein the cutter (1) is an ultrasonic osteotome.