A craniotomy assist device

Abstract

The present application relates to the technical field of corpse autopsy auxiliary device, provide a kind of craniotomy auxiliary device, including fastening ring, fastening ring is equipped with auxiliary ring, fastening ring and auxiliary ring are all fitted on the head of corpse, and guiding groove for limiting the movement of craniotomy electric saw is equipped between auxiliary ring and fastening ring;Limiting frame is also arranged between fastening ring and auxiliary ring, limiting frame is arranged across guiding groove, limiting frame is slidably installed on fastening ring and auxiliary ring respectively, and limiting frame moves synchronously with craniotomy electric saw.The present application solves the problem that craniotomy is carried out by hand-held craniotomy electric saw in the current craniotomy process, the force of electric saw in the radial direction and tangential direction of head needs to be considered simultaneously, which leads to troublesome operation, time-consuming and laborious, and easy to saw deep and damage brain tissue.

Description

Technical Field

[0001] This invention relates to the field of autopsy auxiliary devices, and more particularly to a craniotomy auxiliary device. Background Technology

[0002] In autopsy work involving forensic medicine (including pathology teaching), opening the skull to expose the cranial cavity and conducting histopathological examination of the intracranial brain and its associated tissues is an extremely important and challenging task.

[0003] The skull is a near-spherical structure with hard bone. In current actual craniotomy work, a manually controlled craniotomy saw is usually used for craniotomy. The following defects exist in manual craniotomy: (1) Difficult to operate. During the manual craniotomy, it is necessary to take into account the radial and tangential forces of the saw on the skull at the same time. Since the thickness of the skull varies at different locations, it is difficult to effectively control the forces in both directions at the same time during the actual manual craniotomy, resulting in uneven sawing depths. When the saw cuts too deep, it will damage the brain tissue and affect subsequent examinations; (2) Because it is necessary to consider the radial sawing depth and tangential movement, manual craniotomy takes a long time and consumes a lot of physical strength; (3) High risk factor during operation. Because it is necessary to take into account the forces in both directions, the craniotomy saw is prone to slipping during the craniotomy, injuring the fingers that fix the skull. Currently, there are some auxiliary devices for craniotomy on the market, such as patent number CN202020579277.5, patent name is a craniotomy auxiliary device, and patent number CN202010490852.9, patent name is a surgical craniotomy auxiliary medical device, etc. However, these auxiliary craniotomy devices also have the following defects in use: (1) The structure is complex, the overall structure is bulky, the cost is high, and the operation is troublesome. Some are even fixed together with the dissection table, which reduces the flexibility of operation; (2) In the actual operation, the operator is mostly far away from the instrument, resulting in poor visibility. It is difficult to see the craniotomy path and the depth of the saw, which poses a risk of path deviation and damage to brain tissue.

[0004] Therefore, developing a craniotomy assist device is not only of urgent research value, but also has good economic benefits and industrial application potential. Summary of the Invention

[0005] In order to overcome the defects of the prior art mentioned above, the present invention provides a craniotomy auxiliary device to solve the problem that in the current craniotomy process, the craniotomy is performed by hand-held craniotomy saw, which requires simultaneous consideration of the radial and tangential forces of the saw on the skull, resulting in troublesome operation, time and effort, and easy cutting too deep and damaging brain tissue.

[0006] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows: A craniotomy assist device includes a fastening ring, an auxiliary ring mounted on the fastening ring, both the fastening ring and the auxiliary ring being fitted onto the head of a cadaver, and a guide groove for limiting the movement of a craniotomy electric saw is provided between the auxiliary ring and the fastening ring. A limiting frame is also provided between the fastening ring and the auxiliary ring. The limiting frame is arranged across the guide groove. The two sides of the limiting frame are slidably installed on the fastening ring and the auxiliary ring, respectively, and the limiting frame moves synchronously with the craniotomy saw.

[0007] As an improved technical solution, both the fastening ring and the auxiliary ring include two semicircular rings, with one end of the two semicircular rings of the fastening ring hinged together and the other end connected by a locking mechanism; The two semicircular rings of the auxiliary ring are respectively mounted on the two semicircular rings of the fastening ring via connecting blocks.

[0008] As an improved technical solution, anti-skew mechanisms are respectively provided between the two semicircular rings of the fastening ring and between the two semicircular rings of the auxiliary ring; The anti-skew mechanism includes positioning posts, which are respectively disposed on one half of the fastening ring and the other half of the auxiliary ring. Positioning holes are respectively disposed on the other half of the fastening ring and the other half of the auxiliary ring, and the positioning holes are correspondingly disposed and adapted to the positioning posts.

[0009] As an improved technical solution, the two semicircular rings of the fastening ring are respectively provided with limiting grooves on the side near the guide groove, and the limiting grooves abut against the end of the saw blade mounting head of the craniotomy electric saw; The auxiliary ring has a pad mounting groove on each of its two semicircular rings, and a rubber pad is provided in each of the pad mounting grooves. The surface of the rubber pad is higher than the surface of the two semicircular rings of the auxiliary ring.

[0010] As an improved technical solution, the limiting frame includes a limiting block, which is slidably disposed in the limiting groove, and the limiting block is provided with a groove that is adapted to the end of the saw blade mounting head of the craniotomy electric saw; Connecting frames are respectively mounted on the limiting blocks. The connecting frames are U-shaped and span the fastening ring and the auxiliary ring. Both ends of the connecting frames extend to the side walls of the fastening ring and the auxiliary ring, respectively, and limit the side walls of the auxiliary ring. Guide blocks are connected to both ends of the connecting frames. Guide slides are respectively provided on the semicircular rings of the fastening ring and the auxiliary ring. The guide blocks are slidably installed in the guide slides.

[0011] As an improved technical solution, the guide block is equipped with a ball bearing at one end of the guide slide, and the inner cavity of the guide slide is provided with an arc-shaped groove that matches the ball bearing.

[0012] As an improved technical solution, first baffles are respectively installed on the connecting frame and near the auxiliary ring. The two first baffles are arranged opposite to the limiting block. The bottom of the first baffles and the surface of the auxiliary ring are in clearance fit. A gap is formed between the two first baffles to avoid the drive shaft of the craniotomy saw. The ends of the two first baffles away from the auxiliary ring are respectively provided with guide angles. The connecting frame is provided with two second baffles installed opposite each other in the guide groove, and the second baffles are fitted with the side wall of the guide groove with a clearance fit.

[0013] As an improved technical solution, the engaging mechanism includes a hook, which is mounted on one half of the fastening ring, and a stretchable hanging ring is provided on the other half of the fastening ring, with the hanging ring and the hook being arranged opposite to each other.

[0014] As an improved technical solution, a mounting ring is provided on the side of the fastening ring away from the auxiliary ring, and the mounting ring is provided with a strap for binding the lower jaw of the corpse.

[0015] As an improved technical solution, the fastening ring is made of metal, and the auxiliary ring is made of plastic.

[0016] After adopting the above technical solution, the beneficial effects of the present invention are: By setting a fastening ring with an auxiliary ring, both the fastening ring and the auxiliary ring are fitted onto the skull of the cadaver. A guide groove is provided between the auxiliary ring and the fastening ring to limit the movement of the craniotomy saw. The guide groove, formed on the skull by the fastening ring and the auxiliary ring, guides and limits the trajectory of the craniotomy saw, allowing it to move and cut only along the guide groove. This facilitates control of the tangential force of the craniotomy saw. Simultaneously, the auxiliary ring's abutment and support allow the operator to press the craniotomy saw radially downwards during craniotomy without worrying about excessive cutting depth. Thus, the need to simultaneously consider both tangential and radial forces when performing craniotomy with a handheld saw is transformed into simply applying radial force along the auxiliary ring, ensuring consistent cutting depth and preventing excessive cutting depth that could damage the brain and surrounding tissues. Furthermore, the operation is more convenient and efficient. The guide groove's limiting effect also prevents the craniotomy saw from slipping, eliminating potential hazards during operation. A limiting frame is provided between the fastening ring and the auxiliary ring. The limiting frame is set across the guide groove. The two sides of the limiting frame are slidably installed on the fastening ring and the auxiliary ring respectively, and move synchronously with the craniotomy saw. Since the limiting frame can move synchronously with the craniotomy saw, the spacing and position of the guide groove can be maintained at all times, ensuring the accuracy of the craniotomy saw's travel path. Thus, by setting up the fastening ring, auxiliary ring, guide groove and limiting frame, the convenience and work efficiency of manual craniotomy with a craniotomy saw are ensured. The structure is simple, the operation is flexible and convenient, and it is not limited by external conditions. At the same time, since manual operation allows for close observation of the cutting depth and effect, it is convenient to make adjustments in real time. Both the fastening ring and the auxiliary ring include two semicircular rings. One end of the two semicircular rings of the fastening ring is hinged together, and the other end is connected by a locking mechanism. The locking mechanism can open one end of the two semicircular rings of the fastening ring, making it convenient to fasten the craniotomy auxiliary device to the head of the corpse. The two semicircular rings of the auxiliary ring are respectively installed on the two semicircular rings of the fastening ring through connecting blocks, so that the auxiliary ring can be fixed together with the fastening ring. Anti-deviation mechanisms are provided between the two semicircular rings of the fastening ring and between the two semicircular rings of the auxiliary ring. The anti-deviation mechanism includes a positioning post and a positioning hole. Since one end of the fastening ring is hinged and the other end is engaged, when the two semicircular rings of the fastening ring and the two semicircular rings of the auxiliary ring approach each other, the positioning post will be inserted into the positioning hole for positioning, so as to avoid the problem of positional deviation between the two semicircular rings and affect the craniotomy effect. The fastening ring has a limiting groove on the side of the two semicircular rings near the guide groove. The limiting groove abuts against the end of the saw blade mounting head of the craniotomy saw to limit the horizontal movement of the craniotomy saw. The auxiliary ring has a pad mounting groove on each of the two semicircular rings. A rubber pad is placed in the pad mounting groove. The surface of the rubber pad is higher than the surface of the semicircular ring of the auxiliary ring. Because the rubber pad has a certain elasticity, the operation feels better when the craniotomy saw is held against it and there will be no slippage. At the same time, the cutting depth of the craniotomy saw can be adjusted by selecting or changing the thickness of the rubber pad to ensure that the craniotomy saw will not damage the intracranial brain and related tissues during cutting. The limiting frame includes a limiting block that slides within a limiting groove. The limiting block has a groove that matches the end of the saw blade mounting head of the craniotomy saw. The width of the groove matches the diameter of the saw blade mounting head end, and the length of the groove is significantly larger than the diameter of the saw blade mounting head end. This facilitates the placement of the craniotomy saw within the guide groove and allows the limiting block to move synchronously with the craniotomy saw. Connecting frames are mounted opposite each other on the limiting block. The connecting frames have a U-shaped structure and span the fastening ring and auxiliary ring, connecting... The two ends of the frame extend to the side walls of the fastening ring and the auxiliary ring, respectively, and are connected to guide blocks. The guide blocks are slidably installed in the guide slides set on the semicircular rings of the fastening ring and the auxiliary ring. The fastening ring and the auxiliary ring can be limited by the U-shaped connecting frame, so that the guide groove always maintains a certain distance during the movement of the craniotomy saw, avoiding the deviation of the sawing path. By setting the guide blocks and guide slides, the limiting frame can move synchronously on the fastening ring and the auxiliary ring as the craniotomy saw moves. The guide block is equipped with rolling balls at one end of the guide slide. The inner cavity of the guide slide is provided with an arc-shaped groove that matches the rolling balls. By setting the rolling balls and the arc-shaped groove, the limit frame moves more smoothly. A first baffle is installed on the connecting frame near the auxiliary ring, and the first baffle is set opposite to the limiting block. A second baffle is installed on the connecting frame and in the guide groove. By setting the first baffle, the second baffle and the limiting block, a surrounding cavity can be formed for the craniotomy saw, which is safer during use. At the same time, it avoids the splattering of bone fragments, blood and other human tissues at the cut point when the craniotomy saw cuts the skull. The locking mechanism includes a hook, which is installed on one half of the fastening ring. A stretchable hanging ring is provided on the other half of the ring. The hanging ring and the hook are arranged opposite to each other. The stretchable hanging ring makes it easy to adapt to skulls of different sizes. A mounting ring is located on the side of the fastening ring away from the auxiliary ring. A strap is provided on the mounting ring to bind the craniotomy auxiliary device to the jaw of the head, making the craniotomy auxiliary device more secure.

[0017] In summary, the present invention provides a craniotomy auxiliary device that solves the problems of current craniotomy procedures, which involve using a handheld craniotomy saw, requiring simultaneous consideration of the radial and tangential forces of the saw on the skull, resulting in cumbersome operation, time-consuming and laborious work, and the risk of cutting too deeply and damaging brain tissue. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the present invention from another angle. Figure 3 This is a schematic diagram of the structure of the limiting frame, fastening ring, and auxiliary ring in this invention; Figure 4 This is a cross-sectional view of the guide block in this invention. Figure 5 This is a schematic diagram of the limiting frame in this invention; Figure 6 This is a schematic diagram of the limiting frame in another angular direction in this invention; Figure 7 This is a schematic diagram of the fastening ring, auxiliary ring, and anti-deviation mechanism in this invention; Figure 8 This is a schematic diagram of the fastening ring, auxiliary ring, and locking mechanism in this invention; Reference numerals: 1. Fastening ring, 2. Auxiliary ring, 201. Pad mounting groove, 3. Guide groove, 4. Limiting frame, 401. Limiting block, 402. Groove, 403. Connecting frame, 404. Guide block, 405. Guide slide, 406. Ball bearing, 407. Arc-shaped slide, 5. Craniotomy saw, 6. Engaging mechanism, 601. Hook, 602. Hanging ring, 603. Slider, 604. Slide, 605. Tension spring, 7. Anti-skew mechanism, 701. Positioning post, 702. Positioning hole, 8. Limiting groove, 9. Rubber pad, 10. First baffle, 11. Guide angle, 12. Second baffle, 13. Mounting ring, 14. Strap, 15. Rubber pad attachment groove, 16. Rubber pad. Detailed Implementation

[0020] The present invention will be further described below with reference to specific embodiments. However, the uses and purposes of these exemplary embodiments are only for illustrating the present invention and do not constitute any limitation on the actual scope of protection of the present invention, nor are they intended to limit the scope of protection of the present invention to these embodiments.

[0021] like Figures 1-8As shown, a craniotomy auxiliary device includes a fastening ring 1 and an auxiliary ring 2 mounted on the fastening ring 1. Both the fastening ring 1 and the auxiliary ring 2 are fitted onto the skull of a cadaver. A guide groove 3 is provided between the auxiliary ring 2 and the fastening ring 1 to limit the movement of a craniotomy saw 5. The guide groove 3 is formed on the skull by the fastening ring 1 and the auxiliary ring 2. The guide groove 3 can guide and limit the trajectory of the craniotomy saw 5, so that the craniotomy saw 5 only needs to move along the guide groove 3 to cut, which facilitates the control of the tangential force of the craniotomy saw 5. At the same time, the auxiliary ring 2 provides abutment and support for the craniotomy saw 5. The support function allows the operator to press down the craniotomy saw 5 radially during craniotomy without worrying about excessive cutting depth. Thus, the tangential and radial forces that need to be considered simultaneously when using a handheld saw for craniotomy are transformed into simply applying radial force along the auxiliary ring 2 to press against it, ensuring consistent cutting depth and preventing the craniotomy saw 5 from cutting too deep, which could affect the intracranial brain and surrounding tissues. At the same time, the operation is more convenient and faster, and the work efficiency is higher. In addition, the limiting function of the guide groove 3 also prevents the craniotomy saw 5 from slipping, eliminating the danger factors in the operation process. A limiting frame 4 is also provided between the fastening ring 1 and the auxiliary ring 2. The limiting frame 4 is set across the guide groove 3. The two sides of the limiting frame 4 are slidably installed on the fastening ring 1 and the auxiliary ring 2 respectively. The limiting frame 4 moves synchronously with the craniotomy saw 5. Since the limiting frame 4 can move synchronously with the craniotomy saw 5, the spacing and position of the guide groove 3 can be maintained at all times, ensuring the accuracy of the craniotomy saw 5's travel path. Thus, by setting the fastening ring 1, the auxiliary ring 2, the guide groove 3 and the limiting frame 4, the convenience and work efficiency of manual craniotomy with a saw are ensured. The structure is simple, the operation is flexible and convenient, and it is not limited by external conditions. At the same time, since manual operation allows for close observation of the saw's cutting depth and effect, it is convenient to make adjustments in real time. In addition, there are many models of craniotomy saws. This embodiment uses the BTLJ-111 electric craniotomy saw (80W). When in use, the saw blade swings at high speed and only cuts inelastic materials such as bone. It is only used to cut the skull of a corpse for craniotomy examination.

[0022] In this embodiment, combined with Figures 1-2 as well as Figures 7-8 As shown, both the fastening ring 1 and the auxiliary ring 2 include two semicircular rings. One end of the two semicircular rings of the fastening ring 1 is hinged together, and the other end is connected by the locking mechanism 6. The locking mechanism 6 can open one end of the two semicircular rings of the fastening ring 1, so as to make it easy to fasten the craniotomy auxiliary device to the head of the corpse. The two semicircular rings of the auxiliary ring 2 are respectively mounted on the two semicircular rings of the fastening ring 1 via connecting blocks, so that the auxiliary ring 2 can be fixed together with the fastening ring 1; In addition, rubber pad attachment grooves 15 are provided in the inner cavity of the semicircular ring of the auxiliary ring 2, and rubber pads 16 are attached in the rubber pad attachment grooves 15. Since the scalp of the craniotomy site needs to be cut open and folded outward before the craniotomy is performed, the rubber pads 16 in the inner cavity of the semicircular ring of the auxiliary ring 2 have a certain elasticity, which makes it easy to press down the folded scalp and prevent the scalp from moving. After the craniotomy is completed, the cut skull is reconnected and the folded scalp is re-sutured.

[0023] In this embodiment, combined with Figure 1 and Figure 7 As shown, anti-skew mechanisms 7 are respectively provided between the two semicircular rings of the fastening ring 1 and between the two semicircular rings of the auxiliary ring 2; The anti-deviation mechanism 7 includes positioning posts 701, which are respectively disposed on one half of the fastening ring 1 and the other half of the auxiliary ring 2. Positioning holes 702 are respectively disposed on the other half of the fastening ring 1 and the other half of the auxiliary ring 2. The positioning holes 702 are correspondingly disposed and adapted to the positioning posts 701. When the two half of the fastening ring 1 and the two half of the auxiliary ring 2 approach each other, the positioning posts 701 will be inserted into the positioning holes 702 for positioning, so as to avoid the problem of position deviation between the two opposite half of the rings, which would affect the craniotomy effect.

[0024] In this embodiment, combined with Figures 1-2 and Figures 7-8 As shown, the two semicircular rings of the fastening ring 1 are respectively provided with limiting grooves 8 on the side near the guide groove 3. The limiting grooves 8 abut against the end of the saw blade mounting head of the craniotomy saw 5 to achieve horizontal limiting of the craniotomy saw 5. The auxiliary ring 2 has a pad mounting groove 201 on each of its two semicircular rings. A rubber pad 9 is installed in each of the pad mounting grooves 201. The surface of the rubber pad 9 is higher than the surface of the two semicircular rings of the auxiliary ring 2. Because the rubber pad 9 has a certain elasticity, the operation feels better when the craniotomy saw 5 is held against it, and there will be no slippage. At the same time, the cutting depth of the craniotomy saw 5 can be adjusted by selecting or changing the thickness of the rubber pad 9, so as to ensure that the craniotomy saw 5 will not damage the intracranial brain and its associated tissues during cutting. The installation of the rubber pad 9 and the pad mounting groove 201 can be carried out in the following two ways: An adhesive layer is provided at the bottom of the rubber pad 9, and the rubber pad 9 is directly bonded to the pad mounting groove 201 through the adhesive layer; In addition, a limiting protrusion is provided on the side wall of the rubber pad 9, and a limiting groove is provided on the inner side wall of the pad mounting groove 201 to match the limiting protrusion. When the rubber pad 9 is installed in the pad mounting groove 201, the limiting protrusion is inserted into the limiting groove to fix the rubber pad 9.

[0025] In this embodiment, combined with Figures 1-6 As shown, the limiting frame 4 includes a limiting block 401, which is slidably disposed in the limiting groove 8. The limiting block 401 is provided with a groove 402 that is adapted to the end of the saw blade mounting head of the craniotomy saw 5. The width of the groove 402 is adapted to the diameter of the end of the saw blade mounting head, and the length of the groove 402 is much larger than the diameter of the end of the saw blade mounting head, so that the craniotomy saw 5 can be placed in the guide groove 3. At the same time, the limiting block 401 can move synchronously with the movement of the craniotomy saw 5. Connecting brackets 403 are respectively mounted on the limiting block 401. The connecting brackets 403 have a U-shaped structure and span across the fastening ring 1 and the auxiliary ring 2. Both ends of the connecting brackets 403 extend to the side walls of the fastening ring 1 and the auxiliary ring 2, respectively. The inner side wall of the connecting brackets 403 abuts against the outer side walls of the fastening ring 1 and the auxiliary ring 2, thus providing abutment against the side wall of the auxiliary ring 2 and ensuring that the distance between the guide grooves 3 between the auxiliary ring 2 and the fastening ring 1 remains consistent. Guide blocks 404 are respectively connected to the two ends of the connecting brackets 403. Guide rails 405 are provided on the semicircular rings of fastening ring 1 and auxiliary ring 2 respectively. Guide blocks 404 are slidably installed in the guide rails 405. The fastening ring 1 and auxiliary ring 2 can be limited by the U-shaped connecting frame 403, so that the guide groove 3 always maintains a certain distance during the movement of the craniotomy saw 5, avoiding the deviation of the sawing path. By setting the guide blocks 404 and guide rails 405, the limiting frame 4 can move synchronously on the fastening ring 1 and auxiliary ring 2 as the craniotomy saw 5 moves.

[0026] In this embodiment, combined with Figures 1-6 As shown, a ball bearing 406 is rotatably mounted on one end of a guide slide 405 on a guide block 404. An arc-shaped groove 407 adapted to the ball bearing 406 is provided in the inner cavity of the guide slide 405. By setting the ball bearing 406 and the arc-shaped groove 407, the limit frame 4 moves more smoothly.

[0027] In this embodiment, combined with Figures 1-6 As shown, first baffles 10 are respectively installed on the connecting frame 403 and near the auxiliary ring 2. The two first baffles 10 are opposite to the limiting block 401. The bottom of the first baffle 10 and the surface of the auxiliary ring 2 are in clearance fit. A gap is formed between the two first baffles 10 to avoid the drive shaft of the craniotomy saw 5. The ends of the two first baffles 10 away from the auxiliary ring 2 are respectively provided with guide angles 11. By providing guide angles 11 on the first baffles 10, it is convenient to insert the craniotomy saw 5 when it is used. A second baffle 12 is installed on the connecting frame 403 and located in the guide groove 3 respectively. The second baffle 12 is fitted with the side wall of the guide groove 3 with a gap. By setting the first baffle 10, the second baffle 12 and the limiting block 401, a surrounding cavity can be formed for the craniotomy saw 5, which is safer during use. At the same time, it avoids the bone fragments, blood and other human tissues from splashing out when the craniotomy saw 5 cuts the skull.

[0028] In this embodiment, combined with Figure 2 and Figure 8 As shown, the locking mechanism 6 includes a hook 601, which is fixedly installed on one half of the fastening ring 1. The other half of the fastening ring 1 is provided with a stretchable hanging ring 602, which is arranged opposite to the hook 601. By pulling the stretchable hanging ring 602, the hanging ring 602 is suspended on the hook 601, thereby closing the fastening ring 1. At the same time, it is also convenient to use skulls of different diameters. In this embodiment, the hanging ring 602 can be made of elastic rubber material, which gives it a certain elasticity and facilitates the hanging of the hanging ring 602. In addition, such as Figure 8 In other embodiments shown, the hanging ring 602 can also be mounted on the slider 603. A groove 604 is provided on the semi-circular ring of the fastening ring 1. The slider 603 is slidably mounted in the groove 604. At the same time, a tension spring 605 is provided between the end of the slider 603 away from the hanging ring 602 and the inner sidewall of the groove 604. The tension spring 605 applies a force to the slider 603, so that the hanging ring 602 can be easily suspended on the hook 601.

[0029] In this embodiment, combined with Figure 2 As shown, a mounting ring 13 is provided on the side of the fastening ring 1 away from the auxiliary ring 2. The mounting ring 13 is provided with a strap 14 for binding with the jaw of the corpse. In this embodiment, four mounting rings 13 are provided opposite each other and are respectively installed on the two semicircular rings of the fastening ring 1. Two straps 14 are provided oppositely and cross each other on the mounting ring 13. The craniotomy auxiliary device is bound to the jaw of the head by the straps 14, so that the craniotomy auxiliary device is fixed more firmly.

[0030] In this embodiment, combined with Figure 1 and Figure 2 As shown, the fastening ring 1 is made of a metal material with a certain degree of elasticity, and the auxiliary ring 2 is made of plastic material.

[0031] For ease of understanding, the working process of this embodiment is described below: Combination Figures 1-8As shown, first, the scalp at the point where craniotomy is needed is cut open and folded outward to expose the skull. A suitable rubber pad 9 is selected according to the thickness of the skull, and the rubber pad 9 is installed in the pad installation groove 201. Then, the craniotomy auxiliary device is fastened to the exposed skull, the positioning post 701 of the anti-deviation mechanism 7 is inserted into the positioning hole 702, and the hanging ring 602 is fastened to the hook 601. The strap 14 on the fastening ring 1 is wrapped around the lower jaw of the corpse and tied, thereby fixing the craniotomy auxiliary device to the head of the corpse. Next, place the saw blade of the craniotomy saw 5 in the guide groove 3 between the fastening ring 1 and the auxiliary ring 2, and extend the end of the saw blade mounting head into the groove 402 of the limiting block 401 on the limiting frame 4, and make the end of the saw blade mounting head abut against the limiting groove 8 of the fastening ring 1, so that the drive shaft of the craniotomy saw 5 is located in the gap between the two first baffles 10 and abuts against the rubber pad 9. Then, start the craniotomy saw 5 to cut the skull through the saw blade. During the sawing process, it is only necessary to press the craniotomy saw 5 tightly onto the rubber pad 9 and make the end of the saw blade mounting head abut against the limiting groove 8, and move along the guide groove 3 to open the skull. Since the limiting block 401 is equipped with a connecting frame 403, the two ends of the connecting frame 403 extend to the side walls of the fastening ring 1 and the auxiliary ring 2 respectively, and play a role in abutting and limiting the side wall of the auxiliary ring 2. The end of the connecting frame 403 is connected to a guide block 404, which is slidably installed in the guide slide 405. Thus, the connecting frame 403 can move synchronously with the craniotomy saw 5 during the craniotomy process, thereby limiting the auxiliary ring 2 and keeping the distance between the guide groove 3 between the auxiliary ring 2 and the fastening ring 1 unchanged. By setting the first baffle 10 and the second baffle 12 on the connecting frame 403, the bone fragments of the craniotomy saw 5 during the craniotomy process can be limited to prevent the bone fragments from scattering. After the craniotomy is completed on the guide groove 3 formed by the semicircular ring on one side of the fastening ring 1 and the auxiliary ring 2, the craniotomy is then performed on the wire groove formed by the semicircular ring on the other side. Since the hinge connection of the semicircular ring and the connection of the locking mechanism 6 cannot be cut, the skull at the two connection points will always be connected together. At this time, the craniotomy auxiliary device is removed, and the skull at the remaining connection point is cut manually to remove the skull. Once the examination is complete, the severed skull fragments can be re-stitched back together through the scalp.

[0032] In summary, the present invention provides a craniotomy auxiliary device that solves the problems of current craniotomy procedures, which require simultaneous consideration of the radial and tangential forces of the saw on the skull, resulting in cumbersome operation, time-consuming and laborious work, and the risk of cutting too deeply and damaging brain tissue.

[0033] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the invention. Furthermore, it should be understood that after reading the technical description of this invention, those skilled in the art can make various alterations, modifications, and / or variations to the invention, and all such equivalent forms also fall within the scope of protection defined by the appended claims.

Claims

1. A craniotomy assist device, characterized in that: Includes a fastening ring, on which an auxiliary ring is mounted. Both the fastening ring and the auxiliary ring are fitted onto the head of the corpse. A guide groove is provided between the auxiliary ring and the fastening ring to limit the movement of the craniotomy saw. A limiting frame is also provided between the fastening ring and the auxiliary ring. The limiting frame is arranged across the guide groove. The two sides of the limiting frame are slidably installed on the fastening ring and the auxiliary ring, respectively, and the limiting frame moves synchronously with the craniotomy saw. Both the fastening ring and the auxiliary ring include two semicircular rings. One end of the two semicircular rings of the fastening ring is hinged together, and the other end is connected by a locking mechanism. The two semicircular rings of the auxiliary ring are respectively mounted on the two semicircular rings of the fastening ring via connecting blocks; The two semicircular rings of the fastening ring are respectively provided with limiting grooves on the side near the guide groove, and the limiting grooves abut against the end of the saw blade mounting head of the craniotomy electric saw; The auxiliary ring has a pad mounting groove on each of its two semicircular rings, and a rubber pad is provided in each of the pad mounting grooves. The surface of the rubber pad is higher than the surface of the two semicircular rings of the auxiliary ring. The limiting frame includes a limiting block, which is slidably disposed in the limiting groove, and the limiting block is provided with a groove that is adapted to the end of the saw blade mounting head of the craniotomy electric saw; Connecting frames are respectively mounted on the limiting blocks. The connecting frames are U-shaped and span the fastening ring and the auxiliary ring. Both ends of the connecting frames extend to the side walls of the fastening ring and the auxiliary ring, respectively, and limit the side walls of the auxiliary ring. Guide blocks are connected to both ends of the connecting frames. Guide slides are respectively provided on the semicircular rings of the fastening ring and the auxiliary ring. The guide blocks are slidably installed in the guide slides.

2. The craniotomy assist device as described in claim 1, characterized in that: Anti-skew mechanisms are respectively provided between the two semicircular rings of the fastening ring and between the two semicircular rings of the auxiliary ring; The anti-skew mechanism includes positioning posts, which are respectively disposed on one half of the fastening ring and the other half of the auxiliary ring. Positioning holes are respectively disposed on the other half of the fastening ring and the other half of the auxiliary ring, and the positioning holes are correspondingly disposed and adapted to the positioning posts.

3. The craniotomy assist device as described in claim 1, characterized in that: The guide block is equipped with a ball bearing at one end of the guide slide, and the inner cavity of the guide slide is provided with an arc-shaped groove that matches the ball bearing.

4. The craniotomy assist device as described in claim 1, characterized in that: The connecting frame is provided with two first baffles installed opposite each other near the auxiliary ring. The two first baffles are arranged opposite to the limiting block. The bottom of the first baffle and the surface of the auxiliary ring are both clearance fit. A gap is formed between the two first baffles to avoid the drive shaft of the craniotomy saw. The ends of the two first baffles away from the auxiliary ring are respectively provided with guide angles. The connecting frame is provided with two second baffles installed opposite each other in the guide groove, and the second baffles are fitted with the side wall of the guide groove with a clearance fit.

5. The craniotomy assist device as described in claim 1, characterized in that: The engaging mechanism includes a hook, which is mounted on one half of the fastening ring. A stretchable hanging ring is provided on the other half of the fastening ring, and the hanging ring is arranged opposite to the hook.

6. The craniotomy assist device as described in claim 1, characterized in that: The fastening ring has a mounting ring opposite it on the side away from the auxiliary ring, and the mounting ring is provided with a strap for binding the lower jaw of the corpse.

7. The craniotomy assist device as described in claim 1, characterized in that: The fastening ring is made of metal, and the auxiliary ring is made of plastic.

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