TWI677316B - Spinal implant holder - Google Patents

Abstract

The invention discloses a spinal implant holding device, which includes an outer sleeve, a limiting component, an inner sleeve and a holding member. The outer sleeve includes a receiving hole. The limiting component is disposed at one end of the outer sleeve. The limiting component includes a stopper, an elastic member, a connection hole and an assembly hole. The connecting channels communicate with the assembling channels. The stopper is connected to the elastic member, and the stopper at least partially protrudes from the connection channel to the assembly hole, and the outer sleeve is combined with the limiting component through the assembly hole. The inner sleeve includes a position-limiting groove, and the inner sleeve is combined with the position-limiting component through the assembly hole and is accommodated in the accommodation hole. The stopper abuts against the inner sleeve at the position-limiting groove. The grip is connected to the limiting component.

Description

Spinal implant holding device

The invention relates to an implant holding device, in particular to a spinal implant holding device.

The spine is one of the most important parts that determines the ability of the human body. When the spine is affected, it often affects the patient considerably, including causing pain, numbness, weakness, and even symptoms of incontinence or difficulty. Spondylopathy is mostly caused by damage or weakening of the ligaments around the intervertebral disc, resulting in the nucleus pulposus protruding from between the ligaments, or the vertebral body collapsed or damaged due to aging, fracture, etc. The nerve or spinal cord is compressed, causing the patient to experience severe pain or impaired motor function of the lower limbs. Clinically, it can be diagnosed as disc herniation, spondylolisthesis, spinal canal stenosis or degenerative scoliosis according to different causes.

For patients with disc herniation or after discectomy, a common treatment is Intervertebral Cage Fusion, which is a spinal implant inserted between two adjacent vertebral bodies. , Such as Spinal interbody fusion cage or Intervertebral cage. The height of the intervertebral disc is restored to normal or appropriate height by spinal implants, and then bone grafts (such as autogenous bones, allogeneic bones, or artificial bone substitutes) are infused. ).

Intervertebral fusion is performed by the operator first destroying the outer fiber annulus and clearing the implantation path of the inner nucleus pulposus to form an implant, or directly removing the entire disc. Thereafter, a spinal implant holding device (Holder) is used to hold the spinal implant and implant it into the affected part.

FIG. 1 is a schematic diagram of a conventional spinal implant holding device. Please refer to FIG. 1. The structure of the current spinal implant holding device 9 mainly includes an outer sleeve 91 and an inner rod 92. The outer sleeve 91 has a holding portion 911, which can be a protruding cylinder or a caliper. The holding part 911 takes a protruding cylinder as an example. As shown in FIG. 1, the protruding cylinder can be matched with the groove 901 on the spinal implant 90, and the spinal implant 90 can be fixed to the jacket through interference insertion or thread locking. On tube 91. In addition, the holding portion 911 is exemplified by a caliper. The caliper can clamp the spinal implant 90 through a mechanism operation, and can also fix the spinal implant 90 to the outer sleeve 91. The front end of the inner rod 92 has a thread 921. After the inner rod 92 penetrates the outer sleeve 91, the inner rod 92 is rotated to screw the front thread 921 and the spinal implant 90 to each other. The operator can hold the rear end of the outer sleeve 91 to operate the spinal implant holding device 9 and insert the spinal implant 90 into the affected part to invert the inner rod 92 to disengage the spinal implant 90 from the inner rod 92. After the inner rod 92 is pulled out, the outer sleeve 91 can also maintain a connection with the spinal implant 90. The surgeon can pass the bone graft delivery device through the outer sleeve 91, fill the bone graft material to the affected part, and induce bone cell growth. Intervertebral fusion.

However, the traditional spinal implant holding device 9 shown in FIG. 1 has a pen-like structure, which causes the operator's surgical field to be easily hidden during operation, especially when performing minimally invasive surgery. Degree and time have a great impact. In addition, in order to be able to transfer repair materials such as bone grafts after implantation, the pen-shaped spinal implant holding device 9 usually must be removed before the hand-held site can be combined to deliver the bone graft material. Although some device design manufacturers have later changed the spinal implant holding device 9 to a gun type, although the problems of operative field shielding and retaining of the holding site have been solved to a certain extent, because of changes in the holding method, the operator often Because the spinal implant grasping device 9 is held horizontally, or when the spinal implant holding device 9 is held upside down (the end with which the spinal implant is combined is facing up), the inner rod 92 or the inner sleeve slips backward.

Therefore, how to make the inner cannula of the spinal implant holding device be stably accommodated in the outer cannula to prevent the inner cannula from slipping out is a very important issue for spine surgery.

In view of the above-mentioned problems, the main object of the present invention is to provide a spinal implant holding device, which is assembled with a limiting component and an inner sleeve, and the inner sleeve has a limiting groove to stop the limiting component. The piece can be pressed against the inner sleeve at the limiting groove to solve the problem that the inner sleeve of the conventional spinal implant holding device often slips off.

To achieve the above object, the present invention provides a spinal implant holding device, which includes an outer sleeve, a limiting component, an inner sleeve, and a holding member. The outer sleeve includes a receiving hole. The limiting component is disposed at one end of the outer sleeve. The limiting component includes a stopper, an elastic member, a connection hole and an assembly hole. The connecting channels communicate with the assembling channels. The stopper is connected to the elastic member, and the stopper at least partially protrudes from the connection channel to the assembly hole, and the outer sleeve is combined with the limiting component through the assembly hole. The inner sleeve includes a position-limiting groove, and the inner sleeve is combined with the position-limiting component through the assembly hole and is accommodated in the accommodation hole. The stopper abuts against the inner sleeve at the position-limiting groove. The grip is connected to the limiting component.

According to an embodiment of the present invention, the position-limiting component further includes a mounting hole communicating with the connection hole, and the elastic member is disposed in the connection hole through the mounting hole, and the stopper is located on the top of the elastic member.

According to an embodiment of the present invention, an end of the connecting hole opposite to the mounting hole has an opening, and a maximum outer diameter of the stopper is greater than a maximum inner diameter of the opening.

According to an embodiment of the present invention, the opening is a circular hole, and the stopper is a sphere.

According to an embodiment of the present invention, there is a predetermined angle between the connection hole and the assembly hole, and the predetermined angle is less than 90 degrees.

According to an embodiment of the present invention, the outer sleeve further includes a holding portion located at an end of the outer sleeve opposite to the limiting component, and the holding portion is connected to a spinal implant.

According to an embodiment of the present invention, the limiting groove includes a front convex portion and a groove portion. The front convex portion is closer to the holding portion than the groove portion, and the distance between the front convex portion and the inner wall of the connection channel is less than The stopper projects the height of the connecting hole.

According to an embodiment of the present invention, the stopper is in a depressed state and a released state. When the stopper presses the elastic member, the stopper is in a depressed state, otherwise it is in a released state when the inner sleeve passes through the assembly hole. When combined with the limiting component and housed in the receiving channel, the inner sleeve will pass through the connecting channel, and the stopper will pass through the forward convex part in a depressed state. The stopper will abut against the forward convex part Groove section.

According to an embodiment of the present invention, after the stopper passes through the front convex portion, the stopper returns to the released state at the groove portion.

According to an embodiment of the present invention, the front convex portion has at least one oblique angle on a side close to the holding portion. When the inner sleeve passes through the connecting hole, the oblique angle guides the stopper into a depressed state.

According to an embodiment of the present invention, the spinal implant has an internal thread, and the internal sleeve further includes an external thread and a set of tube knobs. The external thread is disposed at an end of the internal sleeve opposite to the limiting groove, and the sleeve knob It is adjacent to the limiting groove and is used to screw fix the inner sleeve and the spinal implant.

According to an embodiment of the present invention, the limiting groove includes a front convex portion and a groove portion. The front convex portion is closer to the holding portion than the groove portion, and the length of the groove portion is greater than the length of the external thread.

According to an embodiment of the present invention, the spinal implant holding device further includes a feeding component, which includes a receiving tank, a feeding sleeve, a transmission member, a feeding screw, a first stirring rod and a second stirring. Pole. The tank has a discharge opening. The feeding sleeve is connected to the outlet and is contained in the inner sleeve. The transmission member is disposed in the receiving slot, and is at least partially located outside the receiving slot. The feeding screw is connected to the transmission part, and is accommodated in the tank and the feeding sleeve. The first stirring rod and a second stirring rod are respectively connected to the transmission member and are accommodated in the receiving tank.

According to an embodiment of the present invention, the length of the first stirring rod is greater than the length of the second stirring rod.

According to an embodiment of the present invention, there is a first distance between the first stirring rod and the feeding screw, and a second distance between the second stirring rod and the feeding screw, and the first distance is smaller than the second distance.

According to an embodiment of the present invention, the tank is funnel-shaped, the front end of the tank has a relatively small inner diameter, the length of the first stirring rod is sufficient to extend to the front of the tank, and the length of the second stirring rod is not sufficient. Go to the front of the tank.

According to an embodiment of the present invention, the spinal implant holding device further includes a funnel. The hopper includes a discharge pipe, and the discharge pipe is contained in the inner sleeve.

According to an embodiment of the present invention, the spinal implant holding device further includes a tapping member, one end of which is connected to the inner sleeve. The striking part includes a striking part, and the striking part is exposed outside the inner sleeve.

As mentioned above, the spinal implant holding device according to the present invention includes an outer sleeve, a limiting component, an inner sleeve and a holding member. The limiting component includes a stopper, an elastic member, a connection hole, and an assembly hole. The stopper is connected to the elastic member, and the stopper at least partially protrudes from the connection hole to the assembly hole. When the inner sleeve is connected to the outer sleeve and the limiting component, the inner sleeve will compress the stopper, generating an external force that will be transmitted to the elastic member, shrinking the elastic member and further lowering the position of the stopper, so the inner sleeve It can continue to pass through the stopper, and when the limit groove of the inner sleeve reaches the position where the stopper protrudes from the connecting hole, the elastic member can release the elastic force to reset the stopper. After the stopper returns to its original position, it will abut against the inner sleeve at the limit groove, increasing the friction of the inner sleeve relative to the limit component, and reducing the occurrence of slippage of the inner sleeve.

In order to make your reviewing committee better understand the technical content of the present invention, specific preferred embodiments are described below.

FIG. 2 is a schematic view of the first embodiment of the spinal implant holding device of the present invention, FIG. 3 is a schematic view of the spinal implant holding device shown in FIG. 2 before assembly, and FIG. 4 is a view of FIG. 2 For an exploded view of the spinal implant holding device, please refer to FIG. 2, FIG. 3 and FIG. 4 at the same time. First, the spinal implant holding device 1 is used to hold a spinal implant 8. In this embodiment, the intervertebral cage (or a cage) is taken as an example. In this embodiment, the spinal implant grasping device 1 includes an outer sleeve 10, a limiting component 20, an inner sleeve 30, and a holding member 40. In this embodiment, the term “holding” includes fixing the spinal implant 8 to the spinal implant holding device 1 by any means, for example, by means of a screw lock or mechanical interference, so that the operator or operator can hold the spine The spinal implant holding device 1 is used to acquire, move, and place the spinal implant 8.

The outer tube 10 includes a holding portion 11 and a receiving hole 12. The outer cannula 10 is connected and fixed to the spinal implant 8 by the holding portion 11. The holding portion 11 in this embodiment is a convex structure, and the spinal implant 8 has a corresponding groove 81. The holding portion 11 is engaged with the groove 81 in a manner of mechanical interference, so that the outer sleeve 10 is connected to and fixes the spinal implant 8. However, the strength of the spinal implant 8 fixed by the holding portion 11 is limited, and the strength of the main fixation of the spinal implant 8 is still from the external thread 33 on the inner sleeve 30, please refer to the following description. In other embodiments, the holding portion 11 may also be a manual or automatic jig, or any one capable of holding the spinal implant 8 such as a tenon or a fastener, which is not limited in the present invention. The inner channel of the outer cannula 10 is referred to herein as an accommodation channel 12 for accommodating the inner cannula 30 or other instruments used in surgery, such as a bone graft material feeding assembly. The arrangement manner and relationship between the accommodation channel 12 and the outer sleeve 10 and other instruments will be further described later. Preferably, the outer sleeve 10 of this embodiment further has a connecting portion 13 located at an end opposite to the holding portion 11, and the connecting portion 13 is connected to the limiting component 20. In other words, the limiting component 20 is sleeved on an end of the outer casing 10 opposite to the holding portion 11.

In this embodiment, one end of the outer cannula 10 is connected to the spinal implant 9, and the limiting component 20 is sleeved on the other end of the outer cannula 10, and one end of the limiting component 20 is inserted into the receiving slot of the holding member 40. Pins are used to fix the two together, so that the outer tube 10, the limiting assembly 20, and the gripping member 40 form an integrated structure. In other embodiments, the three can also be formed as a one-piece molded structure, as shown in FIG. Preferably, the holding member 40 and the outer sleeve 10 have a predetermined angle q1, and the predetermined angle q1 is less than 180 degrees. In this embodiment, the predetermined angle q1 is 110 degrees. In other words, the holding member 40 and the outer casing 10 are arranged in a non-parallel arrangement, and the outer casing 10, the limiting component 20, and the holding member 40 have a gun-shaped structure as a whole. The operator can hold the gripping member 40 in one hand and the inner sleeve 30 into the outer sleeve 10 from the other end of the limiting assembly 20 from one end under a better viewing angle.

FIG. 5A is an enlarged cross-sectional view of region A of the spinal implant holding device shown in FIG. 2. Please refer to FIG. 4 and FIG. 5A. The limiting assembly 20 includes a stopper 21, an elastic member 22, and a connecting hole 23. The stopper 21 is connected to the elastic member 22, and the stopper 21 protrudes at least partially from the connection hole 23. In detail, the main body 25 of the limit assembly 20 is processed with a lathe to form a mounting hole 24 on one side, and the mounting hole 24 extends toward the accommodation hole 12 in a direction at a predetermined angle q2 with the outer casing 10, and the formed circle The shaped pipe is connected to the channel 23. The elastic member 22 passes through the mounting hole 24 and is disposed in the connecting hole 23. The stopper 21 is located on the top of the elastic member 22. In addition, the main body 25 of the limiting assembly 20 has an assembly hole 251 that is parallel to the outer casing 10 so that the main body 25 is sleeved on the outer casing 10. One end of the connection hole 23 is connected to the mounting hole 24, and the other end has an opening 231, that is, one end of the connection hole 23 opposite to the mounting hole 24 has an opening 231. The opening 231 is located on the inner wall of the assembly hole 251, and the connection hole 23 and the assembly hole 251 communicate with each other by the opening 231.

After the elastic member 22 passes through the mounting hole 24, the remaining part is disposed in the connection hole 23, and the stopper 21 protrudes from the opening hole 231 at least partially to the connection hole 23 and extends to the assembly hole 251. Preferably, the maximum outer diameter OD of the stopper 21 in this embodiment is larger than the maximum inner diameter ID1 of the opening 231 and also larger than the maximum inner diameter ID2 of the elastic member 22. This design allows the stopper 21 to be directly placed on the top of the elastic member 22, and the stopper 21 does not need to be fixed to the elastic member 22, and the stopper 21 does not fall out to the connecting hole 23. Specifically, at the time of assembly, a lathe is used to open a mounting hole 24 and a connecting hole 23 on the main body 25 of the limit assembly 20, and then the stopper 21 is inserted into the installation hole 24, and then the elastic member 22 is inserted. Finally, push the screw or plug into the mounting hole 24, and press the elastic member 22 and the stopper 21 on the elastic member 22 forward to at least partially protrude the connection hole 23 to the assembly hole 251.

The limiting component 20 is sleeved on the outer casing 10, and the outer casing 10 can be combined with the limiting component 20 through the assembly hole 251. Specifically, the outer casing 10 further includes an extension portion 14 connected to an end of the connection portion 13 opposite to the holding portion 11. The extension portion 14 is inserted into the assembling channel 251 of the limit assembly 20, and the opening of the accommodating channel 12 is located outside the assembling channel 251, and one end of the assembling channel 251 is connected to the connecting portion 13, so that the outer tube 10 and the limit position Assembly 20 is combined.

The inner sleeve 30 can also be combined with the limiting component 20 through the assembly hole 251 and accommodated in the accommodation hole 12 of the outer tube 10. The inner sleeve 30 includes a limiting groove 31. When the inner sleeve 30 is accommodated in the receiving hole 12, the limiting groove 31 is located in the assembly hole 251 (refer to FIG. 6B), and the stopper 21 Then, the inner sleeve 30 can be pressed against the limiting groove 31. In this embodiment, the inner sleeve 30 further includes a pipe body 32, and the limiting groove 31 is disposed on the pipe body 32. In addition, there is a gap between the limiting groove 31 and the pipe body 32, and the width of the gap is substantially equal to or greater than the thickness of the extension portion 14. The pipe body 32 can be inserted into the receiving hole 12 from the opening of the extension portion 14. At this time, the extension portion 14 can be inserted between the pipe body 32 and the limiting groove 31 to guide the limiting groove 31 into the assembly channel. 251. The inner sleeve 30 is combined with the limiting component 20 through the assembly hole 251. As shown in FIG. 5A, after the limiting groove 31 enters the assembly hole 251, it is close to the connection hole 23. In addition, the limiting groove 31 is sleeved on the outside of the extension 14, so that the stopper 21 of the limiting component 20 can abut against the inner sleeve 30 at the limiting groove 31, and then press the inner sleeve 30 and the outer sleeve. 10, increase the friction between the two to achieve the external force required to increase the displacement, that is, the effect of not slipping easily.

FIG. 5B is a schematic cross-sectional view of a second embodiment of the spinal implant grasping device of the present invention. Please refer to FIG. 5B. In an embodiment, the outer casing 10a may not have the structure of an extension portion, and the main body 25a of the limiting component 20a is directly connected to the connecting portion 13a of the outer casing 10a, or both are integrally formed. The assembly hole 251a of the limiting component 20a and the receiving hole 12a of the outer tube 10a communicate with each other, and the opening of the receiving hole 12a is located in the assembly hole 251a. In this embodiment, the limiting groove 31 a is closely attached to the outside of the pipe body 32 a, that is, there is no gap between the limiting groove 31 a and the pipe body 32 a. The pipe body 32a of the inner sleeve 30a can pass through the assembling channel 251a and be accommodated in the accommodating hole 12a. The inner sleeve 30a is connected to the assembling channel 251a to complete the combination with the limiting component 20a. At this time, the limiting groove 31a is located in the assembling hole 251a and is close to the connecting hole 23a. Because the assembly hole 251a communicates with the receiving hole 12a, the stopper 21a can directly abut against the inner sleeve 30a at the position-limiting groove 31a, so as to achieve the position-limiting effect.

The detailed structure of the limiting groove 31 is described below with reference to the first embodiment. Please refer to FIG. 5A. The limiting groove 31 includes a front convex portion 311, a groove portion 312, and a rear convex portion 313. The groove portion 312 is located between the front convex portion 311 and the rear convex portion 313, and the front convex portion 311 is close to取 取 部 11。 Holding section 11. In other words, the front convex portion 311 is closer to the holding portion 11 than the groove portion 312. In this embodiment, the distance between the front protrusion 311 and the opening 231 of the connection hole 23 is smaller than the height of the stopper 21 protruding from the connection hole 23, so that the stopper 21 can abut against the front protrusion 311. Taking FIG. 5A as an example, the front convex portion 311 is closely attached to the assembly hole 251, so the distance between the front convex portion 311 and the inner wall of the connection hole 23 is substantially zero, which is smaller than the height of the stopper 21 protruding from the connection hole 23. When the limiting groove 31 enters the assembly hole 251 and gradually approaches the connection hole 23, the protruding stopper 21 can contact the front convex portion 311, and the front convex portion 311 must first press down the stopper 21 before the inner sleeve The tube 30 can continue to move forward.

6A and 6B are schematic diagrams of the action of the stopper and the limit groove shown in FIG. 5A. Since the stopper 21 is connected to the elastic member 22, the stopper 21 can be in a released state R (as shown in FIGS. 5A and 5A) FIG. 6B) and the pressing state P (as shown in FIG. 6A). When the operator pushes the inner sleeve 30 forward, the forward protrusion 311 of the limiting groove 31 presses the stopper 21 downward, and the stopper 21 further presses the elastic member 22. At this time, the stopper 21 is in a depressed state P, as shown in FIG. 6A, otherwise it is in a released state R, as shown in FIGS. 5A and 6B. When the inner sleeve 30 is combined with the limiting component 20 through the assembly hole 251 and the pipe body 32 is accommodated in the accommodation hole 12, the inner sleeve 30 will pass through the connection hole 23, and the stopper 21 is in the lower pressure state P. The front convex portion 311 passes. After the stopper 21 passes through the front convex portion 311, the stopper 21 returns to the released state R at the groove portion 312 and abuts against the groove portion 312, as shown in FIG. 6B. In short, after the stopper 21 passes through the front convex portion 311, the stopper 21 is reset and abuts against the groove portion 312, thereby pressing the inner sleeve 30 to provide pressure to increase the outer wall of the inner sleeve 30 and The friction between the inner walls of the outer sleeve 10 reduces the possibility of relative displacement between the two, so as to avoid the situation where the inner sleeve 30 slips out during surgery or during holding.

Please refer to FIG. 5A. Preferably, the connecting hole 23 and the assembling hole 251 have a predetermined angle q2, and the predetermined angle q2 is less than 90 degrees. That is, the connection hole 23 is disposed obliquely on the limit assembly 20, so that the elastic member 22 accommodated in the connection hole 23 is also obliquely disposed on the limit assembly 20. Since the direction of applying force by the operator is parallel to the assembling channel 251, if the elastic member 22 is perpendicular to the assembling channel 251, the moving direction of the stopper 21 and the moving direction (force applying direction) of the front convex portion 311 are mutually perpendicular, It takes a large amount of effort to cause the front convex portion 311 to press the stopper 21 downward; on the contrary, the design of the elastic member 22 disposed obliquely can achieve a labor-saving effect. In addition, in a state in which the elastic member 22 is perpendicular to the assembly hole 251, if the contact area between the stopper 21 and the front convex portion 311 is too large, the stopper 21 and the front convex portion 311 may be jammed, and the inner portion Situation where the sleeve 30 cannot continue to advance. In this embodiment, because the elastic member 22 and the connecting hole 23 are inclined to the assembly hole 251, the stopper 21 can be a cube, a rectangular parallelepiped, or another polygonal cube, that is, the configuration of the stopper 21 is not limited.

Preferably, the stopper 21 in this embodiment may be a sphere. Correspondingly, the opening 231 of the connection hole 23 may be a round hole. Because the contact area of the stopper 21 of the sphere and the front convex portion 311 is small (single point contact), the front convex portion 311 can pass through the stopper 21 smoothly. Therefore, if the stopper 21 is a sphere, the elastic member 22 is not limited to be inclined to the assembly hole 251, and may be perpendicular to the assembly hole 251. In other words, if the stopper 21 is a sphere, the predetermined angle q2 between the connecting hole 23 and the assembly hole 251 may also be 90 degrees, because the spherical surface of the stopper 21 (spherical body) can guide the front convex portion 311 through the stopper 21, and moves to the groove portion 312.

Please refer to FIG. 5A. Preferably, the front convex portion 311 has at least one oblique angle 3111 on a side close to the holding portion 11, that is, the front end of the front convex portion 311 has an oblique angle 3111. The oblique angle 3111 is located on a side surface in contact with the front convex portion 311. When the inner sleeve 30 passes through the connecting hole 23, the oblique angle 3111 can guide the stopper 21 to move to the limiting groove 31, that is, guide the stopper 21 to move through the front convex portion 311 to the groove portion 312. In other words, in addition to the stopper 21 of the sphere and the elastic member 22 disposed obliquely, the groove 3111 of the front convex portion 311 can also be used to guide the stopper 21 to move to the groove of the limit groove 31 The effect of the section 312. Of course, the oblique angle 3111 also helps to reduce the resistance that the front convex portion 311 passes through the stopper 21.

As shown in FIG. 3, when the operator inserts the inner cannula 30 into the outer cannula 10, the front end of the inner cannula 30 passes through the accommodation hole 12 to interconnect with the spinal implant 8. This embodiment uses a screw lock. Way to connect. The inner sleeve 30 in this embodiment further includes an external thread 33 and a set of tube knobs 34. The external thread 33 is disposed at an end of the inner sleeve 30 opposite to the limiting groove 31, and the sleeve knob 34 is adjacent to the limiting groove 31. As shown in FIG. 4, the external thread 33 is located at the front end of the pipe body 32, the sleeve knob 34 is adjacent to the limiting groove 31, and the sleeve knob 34 is close to the rear convex portion 313 of the limiting groove 312. The limiting groove 31 is sleeved on the rear end of the pipe body 32 together with the sleeve knob 34, and the sleeve knob 34 is connected to the end of the pipe body 32. As shown in FIG. 3, the operator can hold the cannula knob 34 and align the external thread 33 with the receiving hole 12 of the inner sleeve 10 to place the inner sleeve 30 into the receiving hole 12. After the external thread 33 at the front end of the inner sleeve 30 passes through the accommodation hole 12, it can be connected to the spinal implant 8. Correspondingly, the spinal implant 8 further has an internal thread 82, and the external thread 33 of the inner sleeve 30 and the internal thread 82 of the spinal implant 8 cooperate with each other. The operator can rotate the cannula knob 34 to screw the external thread 33 into the internal thread 82, thereby screwing the internal cannula 30 to the spinal implant 8.

Preferably, the length of the groove portion 312 of the limiting groove 31 is greater than the length of the external thread 33 to ensure that the stopper 21 can abut against the groove portion 312 of the limiting groove 31. Specifically, when the external thread 33 is screwed into the internal thread 82, the stopper 21 moves from the front convex portion 311 to the rear convex portion 313, so the length of the groove portion 312 is greater than the length of the external thread 33. When the external thread 33 is screwed to the bottom, the stopper 21 is still located in the groove portion 312.

Please refer to FIG. 7 for reference. FIG. 7 is a schematic view of implanting a spinal implant using the spinal implant holding device shown in FIG. 2. After the operator cuts out the implantation path of the intervertebral disc ID, the inner cannula 30 is assembled on the outer sleeve 10, and the spinal implant 8 is screwed to complete the spinal implant holding device 1 shown in FIG. 1 . Next, the operator can hold the grip 40 to operate the spinal implant holding device 1 and implant the spinal implant 8 into the intervertebral disc ID of the patient. During the implantation process, the spinal implant 8 may cause friction or collision with the inner wall of the implantation path. Since the stopper 21 of this embodiment abuts against the inner sleeve 30 at the groove portion 312, the inner diameter of the inner sleeve 30 can be increased. The friction between the outer wall of the sleeve 30 and the inner wall of the outer sleeve 10 reduces the possibility of relative displacement between the two, so as to avoid the situation where the inner sleeve 30 slips out during surgery or during holding.

In addition, in this embodiment, the outer sleeve 10, the limiting assembly 20, and the holding member 40 collectively present a gun-shaped structure. Compared with the conventional pen-shaped spinal implant holding device 9 (as shown in FIG. 1), the operator will not be held when operating the gun-shaped spinal implant holding device 1 of this embodiment. The hand holding the holding member 40 blocks the field of vision, so the operator can have a better operation field during operation. However, the spinal implant holding device 1 with a gun-type design is more prone to slippage of the inner cannula 30, and the spinal implant holding device 1 of this embodiment has a limiting component 20 and an inner cannula 30. The design of the limiting groove 31 can prevent the inner sleeve 30 from slipping off. Of course, the design of the limiting component 20 and the limiting groove 31 of the inner sleeve 30 in this embodiment can also be applied to a pen-shaped spinal implant holding device 9, and the present invention is not limited thereto.

The size of the implantation path established by the operator may be slightly smaller than the size of the spinal implant 8. Therefore, when the operator operates the spinal implant holding device 1 to implant the spinal implant 8 into the affected part, it must be knocked. , Advance the spinal implant 8 or adjust the angle at which the spinal implant 8 enters. FIG. 8 is a schematic diagram of a third embodiment of the spinal implant holding device according to the present invention. Please refer to FIG. 8. Preferably, the spinal implant holding device 1 b further includes a striking member 50 installed at the rear end of the inner sleeve 30. It should be noted that the difference between the spinal implant holding device 1b of this embodiment and the spinal implant holding device 1 of the first embodiment is only that the percussion member 50 is included, and the outer sleeve 10, the The structures and connection relationships of the bit assembly 20, the inner sleeve 30, and the holding member 40 are the same as those of the spinal implant holding device 1 of the first embodiment, and therefore the component numbers are used. The tapping member 50 of this embodiment can also be applied to the spinal implant holding device 1a of the second embodiment, and the invention is not limited thereto.

The striking member 50 of this embodiment includes a striking portion 51 and a rod body 52, and the rod body 52 is connected to one side of the striking portion 51. When the implantation of the spinal implant 8 is obstructed, the surgeon can place the striking member 50 into the inner cannula 30 to advance the spinal implant 8 by striking. Specifically, the sleeve knob 34 of the inner sleeve 30 also has a through hole 341. The operator can align the rod 52 with the through hole 341 of the sleeve knob 34, and accommodate the rod 52 in the inner sleeve 30. The striking portion 51 is exposed outside the inner sleeve 30. Next, the operator operates other striking instruments, such as a rubber mallet, and strikes the striking portion 51 to advance the spinal implant 8 or move the spinal implant 8 to a preset position. In this embodiment, the rod body 52 further has a convex portion 521 disposed at an end close to the striking portion 51. When the rod body 52 is inserted into the inner sleeve 30, the convex portion 521 is accommodated in the through hole 341 of the sleeve knob 34, so that the striking member 50 can be more stably installed on the inner sleeve 30.

In other embodiments, the convex portion 521 may also have external threads, and the through hole 341 has internal threads that cooperate with each other, so that the striker 50 can be screwed to the inner sleeve 30 to prevent the striker 50 Fall off when struck. In other embodiments, the striking member 50 may include a convex portion 521 and a striking portion 51, that is, it does not have a rod body 52. The convex portion 521 allows one end of the striking member 50 to be directly connected to the inner sleeve 30 in an engaging or locking manner, and the striking portion 51 at the other end is exposed outside the inner sleeve 30.

The operator places the spinal implant 8 in front or back, and if it needs to be filled with bone repair materials such as bone grafts, such as artificial bone substitutes, the feeding assembly 60 can be installed at the rear end of the inner sleeve 30. Please refer to FIGS. 9A and 9B. FIG. 9A is a schematic diagram of a third embodiment of the spinal implant holding device of the present invention, and FIG. 9B is a schematic diagram of the feeding assembly shown in FIG. 9A before being installed. In this embodiment, the spinal implant holding device 1 c further includes a feeding assembly 60. Similarly, the spinal implant holding device 1c of this embodiment is different from the spinal implant holding device 1 of the first embodiment only in that it further includes a feeding component 60, so the outer sleeve 10 and the limiting component 20 The inner sleeve 30 and the gripping member 40 use their component numbers. It should be noted that the feeding assembly 60 of this embodiment can also be applied to the spinal implant holding device 1a of the second embodiment, and the present invention is not limited. FIG. 10 is an exploded view of the feeding assembly shown in FIG. 9. Please refer to FIG. 9A, FIG. 9B and FIG. 10 at the same time.

The feeding assembly 60 in this embodiment includes a receiving tank 61, a feeding sleeve 62, a transmission member 63, a feeding screw 64, a first stirring rod 65, and a second stirring rod 66. The tank 61 has a discharge port 611, and the feeding sleeve 62 is connected to the discharge port 611. As shown in FIG. 10, the feeding screw 64, the first stirring rod 65 and the second stirring rod 66 are connected to the transmission member 63, respectively. The transmission member 63 is disposed in the accommodation groove 61, and the feeding screw 64, the first stirring rod 65 and the second stirring rod 66 are accommodated in the accommodation groove 61, and the transmission member 63 is located at least partially outside the accommodation groove 61.

Specifically, the transmission member 63 includes a connection base 631 and a transmission rod 632. The transmission rod 632 is disposed and fixed on one side of the connection base 631, so that the transmission rod 632 can drive the connection base 631 to rotate together. The first stirring rod 65 and the second stirring rod 66 are disposed and fixed on the other side of the connecting base 631, so that the first stirring rod 65 and the second stirring rod 66 can rotate together with the connecting base 631. The rear end of the feeding screw 64 passes through the opening on the connecting seat 631 and is accommodated and fixed in the transmission rod 632, so that the transmission rod 632 and the feeding screw 64 can rotate coaxially. The feeding screw 64, the first stirring rod 65 and the second stirring rod 66 are parallel to each other, and the first stirring rod 65 and the second stirring rod 66 are respectively disposed on two sides of the feeding screw 64. The tank 61 further includes a cover 612. The rear end of the transmission rod 632 penetrates the cover 612, and the connecting seat 631 and a part of the feeding screw 64, the first stirring rod 65 and the second stirring rod 66 are all accommodated in the receiving tank. Within 61. Among them, the feeding screw 64 penetrates into the feeding sleeve 62, so that the feeding screw 64 is accommodated in the receiving tank 61 and the feeding sleeve 62 at the same time.

The feeding screw 64 is aligned with the discharge port 611, so that the feeding screw 64 is accommodated in the feeding sleeve 62, and at the same time, the connecting base 631, the first stirring rod 65, and the second stirring rod 66 can be placed in the receiving tank 61. Next, after the artificial bone substitute or other bone grafting repairing material is loaded into the container 61, the cover body 612 passes through the transmission rod 632 and then covers the container 61 to assemble the feeding assembly 60 as shown in FIG. 9A. Finally, the feeding sleeve 62 is aligned with the through hole 341 of the sleeve knob 34, and the feeding sleeve 62 is accommodated in the inner sleeve 30, and the feeding sleeve 62 is in communication with the spinal implant 8. Then, the transmission rod 632 of the transmission member 63 can be rotated automatically or manually. For example, the transmission rod 632 can be connected to a power source such as an electric drill to drive the transmission member 63 to rotate.

When the transmission member 63 rotates, the feeding screw 64, the first stirring rod 65, and the second stirring rod 66 also rotate at the same time. The screw on the feeding screw 64 carries a powdery or granular artificial bone substitute and conveys it into the spinal implant 8. Since the transmission rod 632 is arranged coaxially with the feeding screw 64, the first stirring rod 65 and the second stirring rod 66 located on the two sides of the feeding screw 64 can be rotated at the same time, thereby stirring the artificial bone substitute in the tank 61 to drive the artificial The bone substitutes continue to fall on the threads on the feeding screw 64 to continue the material transfer, and at the same time, the artificial bone substitutes can be prevented from being too tight and agglomerated. In order to facilitate the material to be transported forward in a concentrated manner, the container 61 preferably has a shape with a convergent front end, such as a funnel shape in this embodiment. However, the convergent shape of the front end causes the front end 613 of the accommodating groove 61 to have a relatively small inner diameter. In order to prevent the artificial bone substitutes in the container 61 from accumulating and agglomerating at the front end 613 of the container 61, it is preferable that the first stirring rod 65 and the second stirring rod 66 can be designed with different lengths.

FIG. 11 is a schematic cross-sectional view of the feeding assembly shown in FIG. 9A. Please refer to FIG. 11. Preferably, the length L1 of the first stirring rod 65 is greater than the length L2 of the second stirring rod 66, and there is a first distance D1 between the first stirring rod 65 and the feeding screw 64, and the second stirring rod 66 and the feeding screw 64 There is a second distance D2 therebetween, and the first distance D1 is smaller than the second distance D2. In addition, the length L1 of the first stirring rod 65 is sufficient to extend to the front end 613 of the tank 61, and the length L2 of the second stirring rod 66 is not sufficient to extend to the front end 613 of the tank 61. In other words, the first stirring rod 65 may extend to the front end 613 of the receiving tank 61 and be close to the discharge port 611, while the second stirring rod 66 does not extend to the front end 613 of the receiving tank 61 and is farther from the discharging port 611. The first stirring rod 65 can agitate the artificial bone substitute accumulated on the front end 613 of the tank 61 to prevent the artificial bone substitute from continuing to accumulate on the front end 613 of the tank 61 and agglomerate. The second stirring rod 66 is mainly used to evenly disperse the artificial bone substitute in the tank 61, and when the spinal implant holding device 1c is operated horizontally, the agitation of the second stirring rod 66 makes the artificial bone substitute effective. It falls into the feed screw 64 for delivery to the spinal implant 8.

In addition, if a large-volume bone graft such as autologous bone or allogeneic bone is required, a funnel 70 can be combined, as shown in FIG. 12, which is the fourth of the spinal implant holding device of the present invention. Schematic of the examples. Similarly, the spinal implant holding device 1d of this embodiment is different from the spinal implant holding device 1 of the first embodiment only in that the spinal implant holding device 1d further includes a funnel 70. Therefore, the outer tube 10, the limiting assembly 20, the inner sleeve 30 and the holding member 40 use the same component numbers, and the funnel 70 of this embodiment can also be applied to the spinal implant holding device 1a of the second embodiment. The invention is not limited. Please refer to FIG. 3 and FIG. 12 at the same time. The hopper 70 in this embodiment includes a discharge pipe 71 and a receiving groove 72, and the receiving groove 72 and the discharge pipe 71 communicate with each other. The operator can place the discharge pipe 71 into the sleeve knob 34 of the inner sleeve 30, and the discharge pipe 71 can be accommodated in the inner sleeve 30. Next, bone grafts such as autogenous bones, allogeneic bones, or synthetic bones are placed in the receptacle 72, and then the other bone grafts are used to transport the aforementioned bone grafts into the inner sleeve 30 through the discharge pipe 71 by using another device, such as a push rod. Preferably, the length of the push rod may be greater than the length of the inner sleeve 30 to deliver the aforementioned bone graft to the spinal implant 8.

In summary, the spinal implant holding device according to the present invention includes an outer sleeve, a limiting component, an inner sleeve, and a holding member. The limiting component includes a stopper, an elastic member, a connection hole, and an assembly hole. The stopper is connected to the elastic member, and the stopper at least partially protrudes from the connection hole to the assembly hole. When the inner sleeve is connected to the outer sleeve and the limiting component, the inner sleeve will compress the stopper, generating an external force that will be transmitted to the elastic member, shrinking the elasticity and further lowering the position of the stopper, so the inner sleeve can Continue to pass through the stopper, and when the limit groove of the inner sleeve reaches the position where the stopper protrudes from the connecting hole, the elastic member can release the elastic force to reset the stopper. After the stopper returns to its original position, it will abut against the inner sleeve at the limit groove, increasing the friction of the inner sleeve relative to the limit component, and reducing the occurrence of slippage of the inner sleeve.

Regardless of the purpose, means and effect of the present invention, the present invention shows its characteristics that are quite different from those of the conventional technology. I implore your reviewing committee to make a clear observation, to grant a quasi-patent at an early date, to benefit the society, and to have a sense of virtue. However, it should be noted that the above-mentioned embodiments are examples for convenience of explanation. The scope of the claimed rights of the present invention shall be based on the scope of the patent application, rather than being limited to the above-mentioned embodiments.

1.1a, 1b, 1c, 1d, 9‧‧‧ spinal implant holding device

10, 10a, 91‧‧‧ Outer tube

11.911‧‧‧holding department

12, 12a‧‧‧accommodating holes

13, 13a‧‧‧ Connection

14‧‧‧ extension

20, 20a‧‧‧ limit components

21, 21a‧‧‧stop

22, 22a‧‧‧Elastic parts

23, 23a‧‧‧ Connected to the tunnel

231‧‧‧Opening

24, 24a‧‧‧Mounting holes

25, 25a‧‧‧ Subject

251, 251a‧‧‧Assembly hole

30, 30a‧‧‧ inner casing

31, 31a‧‧‧ limit groove

311‧‧‧ forward protrusion

3111‧‧‧ Bevel

312‧‧‧Groove part

313‧‧‧backward

32, 32a‧‧‧ tube

33‧‧‧ Male thread

34‧‧‧ Casing knob

341‧‧‧through hole

40‧‧‧Grip

50‧‧‧ Percussion

51‧‧‧Percussion Department

52‧‧‧ Rod

521‧‧‧ convex

60‧‧‧Feeding components

61‧‧‧container

611‧‧‧Discharge port

612‧‧‧ Cover

613‧‧‧Front

62‧‧‧Feeding sleeve

63‧‧‧Transmission Parts

631‧‧‧Connector

632‧‧‧Drive rod

64‧‧‧feed screw

65‧‧‧The first stirring rod

66‧‧‧Second stirring rod

70‧‧‧ funnel

71‧‧‧Discharging pipeline

72‧‧‧ tank

8, 90‧‧‧ spinal implants

81, 901‧‧‧ groove

82‧‧‧internal thread

92‧‧‧ inner pole

921‧‧‧Thread

A‧‧‧Area

ID‧‧‧Intervertebral Disc

D1‧‧‧First distance

D2‧‧‧Second Distance

ID1, ID2‧‧‧ Maximum inner diameter

L1, L2‧‧‧ length

OD‧‧‧Maximum outer diameter

P‧‧‧Pressed state

R‧‧‧ release status

q1, q2‧‧‧ predetermined angle

FIG. 1 is a schematic diagram of a conventional pen-shaped spinal implant holding device. FIG. 2 is a schematic diagram of a first embodiment of the spinal implant holding device of the present invention. 3 is a schematic view of the spinal implant holding device shown in FIG. 2 before assembly. FIG. 4 is an exploded view of the spinal implant holding device shown in FIG. 2. FIG. 5A is an enlarged cross-sectional view of region A of the spinal implant holding device shown in FIG. 2. FIG. 5B is a schematic cross-sectional view of a second embodiment of the spinal implant holding device of the present invention. FIG. 6A and FIG. 6B are operation schematic diagrams of the stopper and the limit groove shown in FIG. 5A. FIG. 7 is a schematic view of implanting a spinal implant using the spinal implant holding device shown in FIG. 2. FIG. 8 is a schematic diagram of a third embodiment of the spinal implant holding device of the present invention. FIG. 9A is a schematic view of a fourth embodiment of the spinal implant holding device of the present invention. FIG. 9B is a schematic diagram before the feeding assembly shown in FIG. 9A is assembled. FIG. 10 is an exploded view of the feeding assembly shown in FIG. 9. FIG. 11 is a schematic cross-sectional view of the feeding assembly shown in FIG. 9A. FIG. 12 is a schematic diagram of a fifth embodiment of the spinal implant holding device of the present invention.

Claims (18)

A spinal implant holding device includes: an outer sleeve including an accommodating hole; and a limiting component disposed at one end of the outer sleeve. The limiting component includes a stopper, an elastic member, and a connection. A tunnel and an assembly tunnel, the connection tunnel communicating with the assembly tunnel, the stopper connected to the elastic member, and the stopper at least partially protruding from the connection tunnel to the assembly tunnel, and the outer sleeve passing through the assembly tunnel and the limit Position assembly combined; an inner sleeve including a limit groove, the limit groove includes a front convex portion and a groove portion, and the distance between the front convex portion and the inner wall of the connection channel is smaller than the stopper Projecting the height of the connecting hole, the inner sleeve is combined with the limiting component through the assembling hole and is accommodated in the receiving hole, and the stopper abuts the inner sleeve at the limiting groove; and A holding member is connected to the limiting component. The spinal implant holding device according to item 1 of the scope of the patent application, wherein the limiting component further includes a mounting hole communicating with the connection hole, and the elastic member passes through the mounting hole to set the connection hole, The stopper is located on the top of the elastic member. The spinal implant holding device according to item 2 of the scope of patent application, wherein an end of the connecting hole opposite to the mounting hole has an opening, and the maximum outer diameter of the stopper is greater than the maximum inside of the opening. path. The spinal implant holding device according to item 3 of the scope of the patent application, wherein the opening is a round hole and the stopper is a sphere. The spinal implant holding device according to item 1 of the scope of the patent application, wherein the connection channel and the assembly channel have a predetermined angle, and the predetermined angle is less than 90 degrees. The spinal implant holding device according to item 1 of the patent application scope, wherein the outer sleeve further includes a holding portion located at an end of the outer sleeve opposite to the limiting component, and the holding portion is connected to a Spine implants. The spinal implant grasping device according to item 6 of the patent application scope, wherein the forward convex portion is closer to the grasping portion than the groove portion. The spinal implant holding device according to item 1 of the scope of patent application, wherein the stopper is in a depressed state and a released state, and when the stopper is pressed against the elastic member, the stopper is in the depressed state. State, otherwise it is in the released state. When the inner sleeve is combined with the limiting component through the assembly hole and is contained in the accommodation hole, the inner sleeve will pass through the connection hole and the stop The piece passes the forward convex portion in the depressed state, and the stopper abuts against the concave groove portion after the forward convex portion passes. According to the spinal implant holding device described in item 8 of the scope of patent application, the stopper returns to the released state in the groove after the stopper passes. According to the spinal implant holding device according to item 6 of the patent application scope, wherein the forward convex portion has at least one oblique angle on a side close to the holding portion, when the inner sleeve passes through the connection channel, The oblique angle guides the stopper into the depressed state. The spinal implant holding device according to item 1 of the scope of patent application, wherein the spinal implant has an internal thread, the inner sleeve further includes an external thread and a set of tube knobs, and the external thread is provided in the An end of the inner sleeve is opposite to the limit groove, and the sleeve knob is adjacent to the limit groove, and is used for screw-fixing the inner sleeve with the spinal implant. The spinal implant holding device according to item 11 of the scope of the patent application, wherein the length of the groove portion is greater than the length of the external thread. The spinal implant holding device described in item 1 of the scope of patent application, further includes a feeding component, which includes: a receiving tank with a discharge opening; a feeding sleeve connected to the discharge opening, and It is accommodated in the inner sleeve; a transmission part is arranged in the accommodation tank, at least partly outside the accommodation tank; a feeding screw is connected to the transmission part, and is accommodated in the accommodation tank and the feeding sleeve Inside the tube; and a first stirring rod and a second stirring rod, which are respectively connected to the transmission member and are accommodated in the receiving tank. The spinal implant holding device according to item 13 of the application, wherein the length of the first stirring rod is greater than the length of the second stirring rod. The spinal implant holding device according to item 13 of the scope of patent application, wherein there is a first distance between the first stirring rod and the feeding screw, and there is a first distance between the second stirring rod and the feeding screw. Two distances, the first distance is less than the second distance. The spinal implant holding device according to item 13 of the scope of the patent application, wherein the receptacle is funnel-shaped, the front end of the receptacle has a relatively small inner diameter, and the length of the first stirring rod is sufficient to extend to the The front end of the tank, and the length of the second stirring rod is not enough to extend to the front end of the tank. The spinal implant holding device according to item 1 of the scope of patent application, further comprising: a funnel, including a discharge pipe, the discharge pipe being contained in the inner sleeve. The spinal implant holding device according to item 1 of the scope of patent application, further comprising: a striking member, one end of which is connected to the inner sleeve, the striking member includes a striking part, and the striking part is exposed On the outside of the inner sleeve.