CN113598872B - A skull slotting tool - Google Patents

Abstract

The invention belongs to the technical field of medical devices and discloses a skull slotting tool. The skull slotting tool includes a knife for cutting the skull, a base, a fixing part and a profiling groove, the fixing part is arranged on the base, and the fixing part It can be connected to the skull, and the base can be fixed on the skull. The profiling groove is set on the base, and the profiling groove extends along a preset path. The cutter can be inserted into the profiling groove and abut against the skull exposing the profiling groove. The profiling groove can guide the cutter extending into the profiling groove to cut the skull along a preset path. In the present invention, by setting the fixing part and the profiling groove on the base, the fixing part can fix the base, so that the cutter can extend into the profiling groove and abut against the skull, and the profiling groove can guide and extend into the profiling groove The cutting tool cuts the skull along the preset direction, which makes the incision smooth and can strictly control the size of the incision, which shortens the operation time, improves the efficiency of the operation, and reduces the risk of the operation.

Description

A skull slotting tool

technical field

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

Background technique

Implantable neurostimulator is a method to stimulate the target nerve with a certain degree of electric current pulse to adjust or restore brain, nerve or muscle function and relieve symptoms.

During the implantation process of the neurostimulator in the brain, it is necessary to make a groove on the skull so that the neurostimulator can be placed in the brain. In the existing craniotomy process, the doctor usually first draws a line on the skull manually, first Drilling holes manually along the contour line, and then using a cutter to cut the part between two adjacent holes, so as to cut the groove of very precise shape, because the surface of the cut cut after drilling is rough, and may cause the cut area to be too small or If the incision is too large, additional tools are required to expand the incision; when the incision is too large, the gap between the pulse generator and the incision is too large, which is not conducive to the fixation and sealing of the pulse generator, thus increasing the operation time and increasing the surgical risk.

Therefore, it is urgent to provide a skull slotting tool to solve the above problems.

Contents of the invention

The object of the present invention is to provide a skull slotting tool to solve the problems of rough incision surface and mismatched incision contour during the skull slotting process.

For reaching this purpose, the present invention adopts following technical scheme:

A skull slotting tool, including a cutter for cutting the skull, said skull slotting tool also includes:

base;

A fixing part is arranged on the base, the fixing part can be connected to the skull, and fix the base to the skull; and

A profiling groove is arranged on the base, the profiling groove extends along a preset path, the cutter can extend into the profiling groove, and abut against the skull exposing the profiling groove, The profiling groove can guide the knife protruding into the profiling groove to cut the skull along a preset path.

Preferably, the base includes:

an inner ring body and an outer ring body, the inner ring body is arranged in the inner circle 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 slots; and

The connecting body, the inner ring body and the outer ring body are all connected to the connecting body.

Preferably, the fixing part is arranged on the outer ring body.

Preferably, the fixing part is arranged on the inner ring body.

Preferably, the connecting body includes a first connecting portion, and the first connecting portion is arranged in the profiling groove.

Preferably, the connecting body further includes a second connecting portion, the second connecting portion is disposed on the inner ring body, and the second connecting portion can communicate with the inner surface of the inner ring body.

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

Preferably, the end surfaces of the base facing and away from the skull both extend in an arc along a first direction, and the first direction is the width direction of the skull.

Preferably, the fixing part includes:

A pair of fixing hole groups are relatively arranged on the outer ring body, and one of the fixing hole groups includes two fixing holes arranged at intervals;

Four mounting holes are respectively arranged at the bottom of the four fixing holes, and the mounting holes extend to the side of the base opposite to the skull;

Four pins are respectively arranged in the four fixing holes, the pins can pass through and protrude from the mounting holes, and the parts of the pins protruding from the mounting holes are provided with threads and can be connected with the Skull abutment.

Preferably, bosses are provided on the side of the base facing the skull at the edge of the mounting hole, and the four bosses can all be in contact with the skull, and the mounting hole extends to the boss. The end face of the platform abuts against the skull.

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

Preferably, the pin is made of titanium alloy.

Preferably, the preset path is a quadrangle or a circle, and the corners of the quadrangle are transitioned by circular arcs.

Preferably, the cutter is an ultrasonic osteotome.

Beneficial effects of the present invention: by setting the fixing part and the profiling groove on the base, the fixing part can fix the base, so that the cutter can extend into the profiling groove and abut against the skull, and the profiling groove can be guided into The cutter in the profiling groove cuts the skull along the preset direction, making the incision smooth, and can strictly control the size of the incision, so that the incision contour matches the installation size of the pulse generator, shortens the operation time, improves the operation efficiency, and reduces surgical risk.

Description of drawings

Fig. 1 is a schematic structural view of a skull slotting tool provided by an embodiment of the present invention;

Fig. 2 is the front view of the skull slotting tool in Fig. 1;

Figure 3 is a left side view of the skull slotting tool in Figure 1;

Fig. 4 is A-A sectional view among Fig. 3;

Fig. 5 is B-B sectional view among Fig. 3;

Fig. 6 is a C-C sectional view in Fig. 5;

Fig. 7 is a schematic structural view of the skull slotting tool provided by Embodiment 2 of the present invention with the cutter removed;

Figure 8 is a top view of Figure 7;

Fig. 9 is a D-D sectional view in Fig. 8 .

In the picture:

1. Tool;

2. Base; 21. Inner ring body; 22. Outer ring body; 23. Connector; 231. First connection part; 232. Second connection part; 2321. Reserved hole;

3. Profile groove;

4. Fixing part; 41. Fixing hole; 42. Mounting hole; 43. Pin; 44. Boss.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

In the present invention, unless otherwise clearly specified and limited, a first feature being "on" or "under" a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

Embodiment one

In the description of this embodiment, the terms "up", "down", "right", and other orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operations, rather than indicating Or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the invention. In addition, the terms "first" and "second" are only used to distinguish in description, and have no special meaning.

In the prior art, in the process of placing the pulse generator in the brain, a slot must first be made on the skull. Most doctors manually draw a line on the skull, then manually drill holes along the contour line, and then use a knife to cut two adjacent holes. The part in between, thus cutting out the groove of approximate shape. Due to the rough surface of the incision cut out after drilling, and the area of the incision may be too small or too large, when the incision is too small, additional tools are required to expand the incision; when the incision is too large, the pulse generator and the incision If the gap is too large, it is not conducive to the fixation and sealing of the pulse generator, which not only increases the operation time, but also increases the operation risk.

In order to solve the above problems, the present embodiment provides a skull slotting tool, as shown in Figures 1 to 6, the skull slotting tool includes a cutter 1 for cutting the skull, a base 2, a profiling groove 3 and a fixing part 4. The profiling groove 3 is arranged on the base 2, and the profiling groove 3 extends along a preset path, and the preset path is related to the installation size of the pulse generator. Specifically, the preset path is related to the contour of the pulse generator, the installation clearance, and the reserved installation position. The cutter 1 can extend into the profiling groove 3 and abut against the skull exposed from the profiling groove 3 , the profiling groove 3 defines the cutter 1 so that the cutter 1 can cut the skull along the preset path of the profiling groove 3 . The fixing part 4 is arranged on the base 2, and the fixing part 4 can be connected to the skull, and fix the base 2 to the skull, so as to prevent the knife 1 from moving the base 2 during the cutting process.

Further, in this embodiment, the base 2 includes an inner ring body 21, an outer ring body 22 and a connecting body 23, the inner ring body 21 is arranged in the inner circle of the outer ring body 22, and the outer wall of the inner ring body 21 Set opposite to the inner side wall of the outer ring body 22 to form the profiling groove 3, the inner ring body 21 and the outer ring body 22 are connected to the connecting body 23, and the inner ring of the inner ring body 21 can expose part of the skull, so as to facilitate cutting Observe the incision during the process.

Further, in order to reduce the volume of the base 2 and connect the inner ring body 21 and the outer ring body 22 firmly, in this embodiment, the connecting body 23 is arranged in the profiling groove 3, and the outer wall of the inner ring body 21 is connected to the outer ring body 22. The inner side walls of the outer ring body 22 are all connected to the connecting body 23, and the fixing part 4 is arranged on the outer ring body 22 and is close to the connecting body 23, thereby enhancing the connection strength between the inner ring body 21 and the fixing part 4, and preventing the cutting tool 1 from When abutting against the inner ring body 21, the inner ring body 21 will be deformed.

Since the skull has a certain radian in its width direction, in order to facilitate the doctor to judge the incision depth of the cutter 1, preferably, the end faces of the base 2 that are opposite to and away from the skull extend in an arc along the first direction, and the first direction is The width direction of the skull allows the side of the base 2 in contact with the skull to roughly fit the skull, and the doctor can judge the incision of the knife 1 according to the length of the part of the knife handle of the knife 1 exposed to the base 2, thereby facilitating the doctor's operation. Increased craniotomy efficiency.

Specifically, in this embodiment, the preset path is a quadrangle, and the four corners of the quadrangle are transitioned by arcs. The fixing part 4 includes a pair of fixing holes, four mounting holes 42 and four pins 43, each The fixing hole group includes two fixing holes 41, and the two fixing holes 41 are arranged at intervals. The fixing holes 41 are arranged opposite to each other. The four mounting holes 42 are respectively arranged at the bottom of the four fixing holes 41, the mounting holes 42 extend to the side of the base 2 opposite to the skull, and the four pins 43 are respectively arranged in the four fixing holes 41, and the pins 43 can pass through And protrude from the mounting hole 42, and the part of the pin 43 protruding from the mounting hole 42 is provided with threads and can be in contact with the skull. When the doctor uses it, according to the position of the incision, first out four points, and will be located at the four points. The four pins 43 in the fixing holes 41 are nailed into four points respectively, so that the four pins 43 press and fix the outer ring body 22 on the skull, thereby fixing the base 2. Preferably, the pins 43 are made of titanium alloy production.

After cutting the skull of the head, the pulse generator needs to be fixed on the remaining skull of the patient's head. Since four positioning holes have been opened on the skull by four pins 43, in order to reduce the trauma to the patient, the In this embodiment, a pair of fixing hole groups of the fixing part 4 can also fix the pulse generator, that is, the four positioning holes provided by the four pins 43 correspond to the four mounting holes of the fixing hole group of the pulse generator one by one, Therefore, there is no need to open a new positioning hole for fixing the pulse generator, which reduces trauma to the patient.

Further, since the radians of the skulls of each patient are different, in order to facilitate the base 2 to be firmly fixed to the skull, the fixing part 4 also includes a boss 44, and the boss 44 is arranged on the side of the base 2 facing the skull and is positioned at the mounting position. On the edge of the hole 42, the four bosses 44 can all abut against the skull, the mounting hole 42 extends to the end face where the boss 44 abuts with the skull, and the four pins 43 can make the four bosses 44 abut against the outer surface of the skull. connected, so that the base 2 can be firmly fixed on the outer surface of the skull,

With the above-mentioned structure, in order to make the inner ring body 21 firmly connected to the outer ring body 22, preferably, the base 2 includes four connecting bodies 23, and the four connecting bodies 23 are all arranged on a predetermined path, and are respectively close to The four fixing holes 41 are used to ensure the connection strength between the inner ring body 21 and the fixing part 4 when the volume of the connecting body 23 is the smallest, so as to avoid deformation of the inner ring body 21 when the tool 1 abuts against the inner ring body 21 .

Further, in order to prevent the cut skull from falling and to facilitate the removal of the cut skull, the inner side wall of the base 2 in the profiling groove 3 is arranged obliquely, and the cross-sectional area of the profiling groove 3 extends along the cutter 1 The direction of the profiling groove 3 gradually decreases.

Specifically, in this embodiment, the outer surface of the inner ring body 21 and the inner surface of the outer ring body 22 are all inclined, and the profile of the cross section of the outer surface of the inner ring body 21 and the inner surface of the outer ring body 22 The profile of the cross-section all decreases gradually along the direction that the cutter 1 extends into the profiling groove 3, so that an inverted taper is formed on the incision, so that when the skull is cut off, the cut part of the skull will abut against the edge of the skull. On the incision, it not only prevents the severed part of the skull from falling, but also facilitates the removal of the severed part of the skull.

Ultrasonic osteosurgery uses high-intensity focused ultrasound technology to convert electrical energy into mechanical energy through a transducer. After high-frequency ultrasonic vibration, the water in the contacted tissue cells is vaporized, and the hydrogen bond of the protein is broken, so that the bone that needs to be cut during the operation is broken. The organization is completely destroyed. When in use, the temperature of the ultrasonic bone knife head is lower than 38°C, and the surrounding propagation distance is less than 200 microns. Since the high-intensity focused ultrasonic wave only has a destructive effect on bone tissue with a specific hardness, it will not only damage blood vessels and nerve tissues, but also have a hemostatic effect on the surgical wound, further reducing the wound of minimally invasive surgery, and greatly improving the quality of life. Surgical precision, reliability and safety. Further, in this embodiment, the cutter 1 is an ultrasonic osteotome.

Embodiment two

In the first embodiment, the four positioning holes opened by the four pins 43 correspond to the four mounting holes of the fixed hole group of the pulse generator one by one, so that the dimensional accuracy of the positioning holes opened by the four pins 43 by self-tapping is relatively high. , because the skull of the human head is relatively hard, during the opening process, the four positioning holes drilled by the four pins 43 will have errors with the fixing holes of the pulse generator, making it impossible to fix the pulse generator, thus bringing a lot of pain to the patient. Come more trauma.

In order to solve the above problem, in this embodiment, the fixing part 4 is arranged on the inner ring body 21, so that the positioning hole to be opened by the fixing part 4 is set on the skull to be cut off, thereby reducing trauma to the patient.

Specifically, as shown in FIGS. 7 to 9 , in this embodiment, four fixing holes 41 are all provided on the inner ring body 21 , and the four fixing holes 41 are respectively close to the four vertices of the inner ring body 21 , The four mounting holes 42 are respectively arranged at the bottom of the four fixing holes 41, the mounting holes 42 extend to the side of the base 2 opposite to the skull, and the four pins 43 are respectively arranged in the four fixing holes 41, and the pins 43 can pass through And protrude from the mounting hole 42, and the part of the pin 43 protruding from the mounting hole 42 is provided with threads and can be in contact with the skull. When the doctor uses it, according to the position of the incision, first out four points, and will be located at the four points. The four pins 43 in the fixing hole 41 are nailed into four points respectively, so that the four pins 43 press and fix the inner ring body 21 on the skull, so that the four holes of the four pins 43 self-tapping fall on the desired position. on the cut skull, thereby reducing trauma to the patient.

Since the connecting body 23 will inevitably break a part of the profiling groove 3, after the cutter 1 cuts along the preset path of the profiling groove 3, no continuous incision is formed on the skull. At this time, the base 2 needs to be removed, and then Cutting continues along the incision with knife 1 to form a closed incision, whereby part of the skull is excised.

Since the cutter 1 is in the cutting process, the cutter 1 will press against the outer wall of the inner ring body 21 and the inner wall of the outer ring body 22, in order to avoid the deformation of the inner ring body 21, in this embodiment, the connecting body 23 includes a first connecting portion 231 and a second connecting portion 232. The first connecting portion 231 is arranged in the profiling groove 3. The first connecting portion 231 communicates with the outer wall of the inner ring body 21 and the inner wall of the outer ring body 22. The two connecting parts 232 are arranged on the inner side wall of the inner ring body 21 and can communicate with the inner side wall of the inner ring body 21 to enhance the structural strength of the inner ring body 21 and thus reduce the deformation of the inner ring body 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 diagonal corners of the inner ring body 21, and the four fixing holes 41 are respectively provided in the inner ring body 21 on the four diagonal corners, and located at the connection between the inner ring body 21 and the second connecting part 232, not only enhances the structural strength of the inner ring body 21, but also enhances the structural strength between the fixing part 4 and the base 2 , so that the base 2 can be more firmly fixed on the skull.

Because the cutter 1 cuts the skull more, the gap of the otch is larger. The direction of the profiling groove 3 gradually decreases, and the cut skull cannot be pressed against the incision and will still fall. In order to solve the above problems, in this embodiment, the base 2 is also provided with a reserved hole 2321, the reserved hole 2321 is provided on the second connecting part 232, and is located at the center of the preset contour, and the medical staff can A connecting hole is opened on the exposed skull of the hole 2321, and is connected to the connecting hole by other tools. When the medical personnel use the cutter 1 to cut the remaining breakpoints to form a closed incision, they can use other tools to connect to the cut off points first. on the skull, thereby facilitating the removal of the skull, and preventing the severed skull from falling into the incision.

Apparently, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. Various obvious changes, readjustments, and substitutions will occur to those skilled in the art without departing from the scope of the present invention. It is not necessary and impossible to exhaustively list all the implementation manners here. All modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (11)

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

a base (2);

a fixing part (4) arranged on the base (2), wherein the fixing part (4) can be connected to the skull and fix the base (2) to the skull; and

A profiling groove (3) arranged on the base (2), wherein the profiling groove (3) extends along a preset path, the cutter (1) can extend into the profiling groove (3) and is abutted against the skull exposed out of the profiling groove (3), and the profiling groove (3) can guide the cutter (1) extending into the profiling groove (3) to cut the skull along the preset path;

the inner side wall of the base (2) in the profiling groove (3) is obliquely arranged, and the area of the cross section of the profiling groove (3) is gradually reduced along the direction that the cutter (1) stretches into the profiling groove (3);

the base (2) comprises:

an inner ring body (21) and an outer ring body (22), wherein the inner ring body (21) is arranged in an 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) so as to form the profiling groove (3); and

A connecting body (23), wherein the inner ring body (21) and the outer ring body (22) are connected to the connecting body (23);

the connecting body (23) comprises a first connecting part (231), and the first connecting part (231) is arranged in the profiling groove (3);

the connecting body (23) further comprises a second connecting portion (232), the second connecting portion (232) is arranged on the inner ring body (21), and the second connecting portion (232) can be communicated with the inner side face of the inner ring body (21).

2. A skull grooving tool according to claim 1, wherein the fixing part (4) is provided on the outer ring body (22).

3. A skull grooving tool according to claim 1, wherein the fixing part (4) is provided on the inner ring body (21).

4. A skull grooving tool according to claim 1, wherein the second connection portion (232) is provided with a preformed hole (2321), the preformed hole (2321) being capable of exposing a portion of the skull.

5. A skull grooving tool according to claim 1, wherein the end faces 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.

6. A skull grooving tool according to claim 1, wherein the fixing portion (4) comprises:

a pair of fixed hole groups which are oppositely arranged on the outer ring body (22), wherein one fixed hole group comprises two fixed holes (41) which are 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 one 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 penetrate through and extend out of the mounting holes (42), and the parts, extending out of the mounting holes (42), of the pins (43) are provided with threads and can be abutted with the skull.

7. A skull grooving tool according to claim 6, characterized in that a portion of the face of the base (2) facing the skull at the edge of the mounting hole (42) is provided with bosses (44), four of the bosses (44) being able to abut the skull, the mounting hole (42) extending to the end face of the boss (44) abutting the skull.

8. A skull grooving tool according to claim 6, wherein the base (2) comprises four connection bodies (23), the four connection bodies (23) being arranged in the profiling groove (3) and being adjacent to the four fixation holes (41), respectively.

9. A skull slotting tool according to claim 6, wherein the pins (43) are made of titanium alloy.

10. A skull grooving tool according to any one of claims 1-9, wherein the pre-set path is quadrilateral or circular, the apex angle of the quadrilateral being transited by an arc.

11. A skull grooving tool according to any one of claims 1-9, characterized in that the tool (1) is an ultrasonic bone knife.

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