Fusion cage driver

Abstract

The utility model provides a fusion cage driver which comprises an outer tube, a rod and an L-shaped clamping piece, the outer tube is provided with an axial through hole and comprises a far end and a near end; the rod comprises a far end and a near end, the rod penetrates through the through hole of the outer tube and can axially move and freely and radially rotate along the through hole, the length of the rod is larger than that of the through hole, and an external thread part is arranged at the far end of the rod; the L-shaped clamping piece comprises a vertical clamping part and a horizontal clamping part, and the end part of the vertical clamping part is connected to the outer side of the far end of the outer tube; the rod can axially move to the far end to be hidden in the through hole; the rod can axially move to the far end to be hidden in the through hole; and the rod can also axially move until the far end of the rod is located outside the far end of the through hole, so that the length of the part, extending out of the far end of the through hole, of the rod and the L-shaped clamping piece form a U shape, and the U shape is used for clamping the fixing plate and the fusion cage at the same time. The fusion cage and the fixing plate are integrally implanted, so that synchronous mounting or dismounting of the fusion cage and the fixing plate is realized.

Description

Technical Field

[0001] The utility model relates to a medical device for intervertebral disc surgery, in particular to a fusion device injector. Background Art

[0002] At present, in traditional intervertebral disc fusion surgery, the fusion device and the fixation plate are often implanted separately, which requires multiple instruments to operate, is inefficient, and increases the fatigue of doctors. In addition, separate implantation can easily lead to relative position deviation between the fusion device and the fixation plate, which poses clinical risks and may lead to medical accidents. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a fusion device implanter, which can implant the fusion device and the fixing plate in an integrated manner, realize the synchronous installation or removal of the two, improve the success rate of the operation and the treatment effect of the patient, and reduce the pain of the patient.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A fusion device inserter comprises an outer tube and a rod;

[0006] The outer tube has an axial through hole and includes a distal end and a proximal end;

[0007] The rod comprises a distal end and a proximal end, the rod passes through the through hole of the outer tube and can move axially along the through hole and can move axially relative to the through hole, and can freely rotate radially relative to the outer tube, the length of the rod is greater than the length of the through hole, and the distal end of the rod is provided with an external threaded portion;

[0008] The external threaded portion can be moved to be hidden in the through hole, or can be moved to the far end of the through hole;

[0009] It also includes an L-shaped clamping piece, which includes a vertical clamping portion and a horizontal clamping portion, and the end of the vertical clamping portion is connected to the outer side of the distal end of the outer tube; when the rod can move axially to its distal end and hide in the through hole; the rod can also move axially to the distal end of the rod is located outside the distal end of the through hole and there is a certain axial distance between the external threaded portion and the through hole, so that the partial length of the rod extending from the distal end of the through hole forms a U-shape with the L-shaped clamping piece. When the external threaded portion of the rod is exposed from the distal end of the through hole, the vertical clamping portion, the horizontal clamping portion and the external threaded portion form a U-shape, which is used to clamp the fixation plate and the fusion device at the same time.

[0010] Furthermore, a first positioning pin extending perpendicularly to the vertical clamping portion is provided on the inner side surface of the vertical clamping portion, and a second positioning pin extending perpendicularly to the horizontal clamping portion is provided on the inner side surface of the horizontal clamping portion.

[0011] Furthermore, the outer side wall of the proximal end of the rod is provided with at least one flange, and the flange can limit the range of axial movement of the rod.

[0012] Furthermore, a step is provided on the inner side surface of the horizontal clamping portion.

[0013] Furthermore, in the L-shaped clamping piece, the angle between the vertical clamping portion and the outer side wall of the outer tube is less than 90°.

[0014] Furthermore, it also includes an L-shaped handle, which includes a handle portion, a connecting portion and a sleeve portion. The handle portion is used for hand grasping, one end of the connecting portion is connected to the front end of the handle portion, and the other end is connected to the side wall of the sleeve portion. The sleeve portion is fixedly sleeved on the rear end of the outer tube.

[0015] Furthermore, the opening angle of the L-shaped handle is an obtuse angle, and the adapter is arranged perpendicular to the outer tube.

[0016] Furthermore, it also includes a hammer head connecting piece, which is fixed to the rear end of the handle part.

[0017] Furthermore, an extension line of the length of the handle portion is arranged perpendicular to the vertical clamping portion.

[0018] The beneficial effect of the utility model is that the fusion device and the fixing plate are implanted in an integrated manner, so that the fusion device and the fixing plate can be implanted synchronously, and the fixing plate can be locked after implantation, and can be removed synchronously. Compared with the traditional technology, the present invention only needs one instrument, which is easier to operate and more efficient, can reduce the operation time, and the implantation position is more accurate, which can effectively reduce the incidence of medical accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional image of a fusion cage used in spinal surgery;

[0020] Figure 2 A stereoscopic view of a fixation plate used in spinal surgery;

[0021] Figure 3 This is a three-dimensional picture of the fusion cage and the fixation plate after connection;

[0022] Figure 4 A three-dimensional diagram of a fusion device driver according to an embodiment of the present invention;

[0023] Figure 5 For the utility model embodiment Figure 4 A partial enlarged view of;

[0024] Figure 6 A front view of the front end portion of the L-shaped clamping member of the fusion device driver according to the embodiment of the present utility model;

[0025] Figure 7 This is a stereoscopic view of the front end of the fusion device driver according to an embodiment of the utility model after being connected to the fixing plate and the fusion device.

[0026] Description of labels:

[0027] 1. Outer tube; 2. Rod; 4. L-shaped clamp; 5. L-shaped handle; 6. Hammer head connector; 7. Locking screw; 8. Fusion device; 9. Fixing plate;

[0028] 21. flange;

[0029] 41. Step; 42. Vertical clamping part; 43. Horizontal clamping part; 44. Positioning pin 1; 45. Positioning pin 2;

[0030] 51. handle portion; 52. adapter portion; 53. sleeve portion;

[0031] 81. Positioning pin hole 2; 82. Internal thread hole;

[0032] 91. Positioning pin hole 1; 92. Threaded portion hole; 93. Screw hole. DETAILED DESCRIPTION

[0033] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0034] Please refer to Figures 4 to 7 , the embodiments provided by the utility model are:

[0035] A fusion device inserter includes an outer tube 1 and a rod 2. The outer tube 1 has an axial through hole, including a distal end and a proximal end. The so-called distal end refers to the end that extends into the human body during surgery, and the so-called proximal end refers to the end that is operated by a human hand. The rod 2 includes a distal end and a proximal end. The rod 2 passes through the through hole of the outer tube 1. The length of the rod 2 is greater than the length of the through hole. The distal end of the rod 2 is provided with an external threaded portion. The rod 2 can not only move axially relative to the outer tube 1, but also rotate freely radially relative to the outer tube 1.

[0036] Specifically, the above-mentioned fusion device inserter also includes an L-shaped clamping piece 4, which includes a vertical clamping portion 42 and a horizontal clamping portion 43, and the end of the vertical clamping portion 42 is connected to the outer side of the distal end of the outer tube 1; the rod 2 can move axially until its distal end is hidden in the through hole; the rod 2 can also move axially until the distal end of the rod 2 is located outside the distal end of the through hole and there is a certain axial distance between the external threaded portion and the through hole, so that the partial length of the rod 2 extending from the distal end of the through hole forms a U-shape with the L-shaped clamping piece, which is used to clamp the fixing plate and the fusion device at the same time.

[0037] Specifically, the stereogram of the fusion device 8 is shown in Figure 1 As shown, the three-dimensional view of the fixing plate 9 is shown in Figure 2 As shown, the stereoscopic view of the fusion device 8 and the fixing plate 9 after connection is shown in Figure 3 As shown. For the fusion device impactor of the present application, the vertical clamping portion 42, the horizontal clamping portion 43 and the external threaded portion form a U-shape, which can clamp the fixing plate and the fusion device, so as to realize positioning the fixing plate 9 and the fusion device 8 together at the far end of the fusion device impactor, and the impactor can carry the fusion device 8 and the fixing plate 9 to be implanted into the body synchronously, and the fusion device 8 and the fixing plate 9 can also be removed synchronously.

[0038] Specifically, a first positioning pin 44 extending perpendicularly to the vertical clamping portion 42 is provided on the inner side surface of the vertical clamping portion 42, and a second positioning pin 45 extending perpendicularly to the horizontal clamping portion 43 is provided on the inner side surface of the horizontal clamping portion 43. When in use, the fixing plate 9 is positioned by the first positioning pin 44, the fusion device 8 is positioned by the second positioning pin 45 and the external threaded portion, and the fusion device 8 is locked and connected by the external threaded portion, so that the fixing plate 9 and the fusion device 8 are positioned together at the front end of the impactor.

[0039] For details, see Figures 4 to 7As shown, when the fusion device 8 is implanted in the body, the external threaded portion is first rotated into the through hole of the outer tube 1 outside the human body, and then the fixing plate 9 is placed on the front end of the impactor. The side of the fixing plate 9 is provided with a positioning pin hole 91 that cooperates with the positioning pin 44. The fixing plate 9 is positioned by the positioning pin 44 on the vertical clamping portion 42. The proximal end of the rod 2 is pushed hard to make the rod 2 move radially relative to the outer tube 1 until the external threaded portion is exposed to the outside of the outer tube 1 and passes through the threaded portion hole 92 provided on the fixing plate 9 to achieve the positioning of the fixing plate 9. Next, the fusion device 8 is placed on the front end of the impactor. The side of the fusion device 8 is provided with a positioning pin hole 81 that cooperates with the positioning pin 45. The fusion device 8 is positioned by using the fusion device positioning pin 2 45 on the flat contact plate 43, and the proximal end of the rod 2 is rotated so that the external threaded portion of the rod 2 is screwed into the internal threaded hole 82 on the fusion device to achieve complete positioning of the fusion device; next, the impactor fixed with the fusion device 8 and the fixing plate 9 is fixed into the human body, and the fusion device 8 and the fixing plate 9 are placed at appropriate positions of the human spine. The fixing plate 9 is also provided with four screw holes 93 for screws to pass through. The four screws are sequentially passed through the four screw holes 92 on the fixing plate 9 with a screw fixing tool, and the fixing plate 9 is locked to the human skeleton with the four screws. After the four screws are fixed, the fusion device impactor is removed from the human body.

[0040] Specifically, when it is necessary to remove the fusion device 8 and the fixing plate 9 from the human body, the impactor is similarly extended into the human body. At the front end of the impactor, the positioning pin 44 on the vertical clamping portion 42 is inserted into the positioning pin hole 91 in the middle of the fixing plate 9, and the fusion device positioning pin 45 on the horizontal contact plate 43 is inserted into the positioning pin hole 81 on the side of the fusion device 8. The four screws installed on the fixing plate 9 are removed with a tool for removing the screws, and then the fusion device 8 and the fixing plate 9 are taken away from the human body together with the impactor.

[0041] Furthermore, the outer side wall of the proximal end of the rod 2 is provided with at least one flange 21, and the flange 21 can limit the axial range of motion of the rod 2, thereby limiting the length of the rod 2 exposed from the distal end of the outer tube 1, and can also ensure that the proximal end of the rod 2 can be grasped by hand during operation.

[0042] Furthermore, a step 41 is provided on the inner side of the horizontal contact plate 43. In order to adapt to the shape of the fusion device and the impactor, the step 41 is provided to fit the outer side of the fusion device and the impactor, so that the positioning of the fusion device and the impactor is more stable and reliable.

[0043] Furthermore, in the L-shaped clamping part 4, the angle between the vertical clamping part 42 and the outer side wall of the outer tube 1 is less than 90°, so that the external threaded part of the rod 2 is obliquely inserted into the threaded holes corresponding to the fixing plate and the fusion device, so that the vertical clamping part 42, the horizontal clamping part 43 and the rod 2 form a U-shape, which can limit the freedom of the fusion device and the fixing plate in more directions, and also enable the outer tube 1 and the rod 2 to be obliquely inserted into the human body, which is more ergonomic and also provides a better field of vision.

[0044] Furthermore, an L-shaped handle 5 is included, and the L-shaped handle 5 includes a handle portion 51, an adapter portion 52 and a sleeve portion 53. The handle portion 51 is used for hand grasping, one end of the adapter portion 52 is connected to the front end of the handle portion 51, and the other end is connected to the side wall of the sleeve portion 53. The sleeve portion 53 is fixedly sleeved on the rear end of the outer tube 1. The L-shaped handle 5 is provided so that the handle portion 51 grasped by hand and the screw knob 3 are on different axes, which makes the operation more convenient.

[0045] Specifically, the opening angle of the L-shaped handle 5 is an obtuse angle, the adapter portion 52 is vertically arranged to the outer tube 1, and the handle portion 51 is vertically arranged to the vertical clamping portion 42, so that external force acts on the fixing plate 9 through the handle portion 51, and the force-bearing structure is reasonable.

[0046] Furthermore, it also includes a hammer head connector 6, which is fixed to the rear end of the handle portion 51. The hammer head connector 6 is used to connect a pressing hammer head or a pulling hammer head. When the fixing plate 9 and the fusion device 8 need to be implanted into the human body as a whole, the pressing hammer head is fixed on the hammer head connector 6, and the pressing hammer head is knocked when necessary to install; when the fixing plate 9 and the fusion device 8 need to be removed from the human body together, the pulling hammer head is fixed on the hammer head connector 6, so that external force directly acts on the pulling hammer head to perform the operation.

[0047] Furthermore, the extension line of the handle portion 51 in the length direction is arranged perpendicular to the vertical clamping portion 42. The positioning pin hole on the fixing plate 9 is located in the middle area of ​​the fixing plate 9, and the extension line of the length of the handle portion 51 is arranged perpendicular to the vertical clamping portion 42, so that the applied external force is directly applied to the middle area of ​​the fixing plate 9, so that the fusion device 8 and the fixing plate 9 are subjected to more balanced forces, and the stability during operation is good. Preferably, the positioning pin 1 44 is located in the middle of the vertical clamping portion 42, and the handle portion 51 is coaxially arranged with the positioning pin 1 44, so that the fusion device 8 and the fixing plate 9 are subjected to more balanced forces and better stability during operation.

[0048] In summary, the utility model provides a fusion device implanter, wherein the fusion device 8 and the fixing plate 9 are implanted synchronously, and the fusion device 8 and the fixing plate 9 are implanted into the corresponding positions of the patient at the same time through an integrated implantation device, which is easy to operate and can achieve synchronous implantation and fixation. When disassembly is required after implantation, only one instrument is needed to achieve synchronous disassembly of the fusion device 8 and the fixing plate 9, which is easy to operate, reduces the doctor's operation time and fatigue, improves the success rate of the operation and the treatment effect of the patient, and reduces the patient's pain.

[0049] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A fusion device inserter, comprising an outer tube (1) and a rod (2); The outer tube (1) has an axial through hole, including a distal end and a proximal end; The rod (2) comprises a distal end and a proximal end. The rod (2) passes through the through hole of the outer tube (1) and can move axially relative to the through hole and can freely rotate radially relative to the outer tube (1). The length of the rod (2) is greater than the length of the through hole. The distal end of the rod (2) is provided with an external threaded portion. It is characterized in that It also includes an L-shaped clamping piece (4), which includes a vertical clamping portion (42) and a horizontal clamping portion (43), and the end of the vertical clamping portion (42) is connected to the outer side of the distal end of the outer tube (1); the rod (2) can move axially until its distal end is hidden in the through hole; the rod (2) can also move axially until the distal end of the rod (2) is located outside the distal end of the through hole, so that the partial length of the rod (2) extending out of the distal end of the through hole forms a U shape with the L-shaped clamping piece, which is used to clamp the fixing plate and the fusion device at the same time.

2. The fusion device according to claim 1, characterized in that: A first positioning pin (44) extending perpendicularly to the vertical clamping portion (42) is provided on the inner side surface of the vertical clamping portion (42), and a second positioning pin (45) extending perpendicularly to the horizontal clamping portion (43) is provided on the inner side surface of the horizontal clamping portion (43).

3. The fusion device according to claim 1, characterized in that: The outer side wall of the proximal end of the rod (2) is provided with at least one flange (21), and the flange (21) can limit the range of axial movement of the rod (2).

4. The fusion device according to claim 1, characterized in that: A step (41) is provided on the inner side surface of the horizontal clamping portion (43).

5. The fusion device according to claim 1, characterized in that: In the L-shaped clamping piece (4), the angle between the vertical clamping portion (42) and the outer side wall of the outer tube (1) is less than 90°.

6. The fusion device according to claim 5, characterized in that: It also comprises an L-shaped handle (5), the L-shaped handle (5) comprising a handle portion (51), a connecting portion (52) and a sleeve portion (53), the handle portion (51) being used for hand grasping, one end of the connecting portion (52) being connected to the front end of the handle portion (51), and the other end being connected to the side wall of the sleeve portion (53), the sleeve portion (53) being fixedly sleeved on the rear end of the outer tube (1).

7. The fusion device according to claim 6, characterized in that: The opening angle of the L-shaped handle (5) is an obtuse angle, and the adapter (52) is arranged perpendicularly to the outer tube (1).

8. The fusion device according to claim 6, characterized in that: It also includes a hammer head connecting piece (6), and the hammer head connecting piece (6) is fixed to the rear end of the handle part (51).

9. The fusion device inserter according to claim 6 or 8, characterized in that: The extension line of the handle portion (51) is arranged perpendicular to the vertical clamping portion (42).

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