Domino connector set for spine surgery

Abstract

The invention belongs to the technical field of medical instruments, and relates to a domino connector set for spinal surgery, which comprises an angle and height adjustable domino connector and an on-nail domino connector, the angle and height adjustable domino connector comprises a first domino body (1) and a second domino body (2), the first domino body (1) is connected with one end of the first connecting body (3) through the locking pin (5) and can rotate and swing relative to the first connecting body (3), and the second domino body (2) is connected with the other end of the first connecting body (3) through the second connecting body (4) and the clamping ring (6) and can rotate and adjust the height relative to the first connecting body (3). The first domino body (1) and the second domino body (2) can achieve horizontal distance adjustment, and a domino connector on the screw is connected to a pedicle screw. A new rod and an old rod can be firmly fixed, and the operation flexibility and accuracy are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices and relates to a domino connector, in particular to a domino connector set for spinal surgery. Background Art

[0002] Patients with recurrent spinal diseases require surgical treatment, and to ensure long-term stability of the spine, the fixed segment often needs to be extended. In traditional surgical designs, in order to extend the fixed segment, the original internal fixation device needs to be completely stripped and exposed, and the fixation rod needs to be replaced to connect the new and old surgical segments. However, there is often a large amount of old scar tissue in the secondary surgical area, which is difficult to separate, the field of vision is unclear, and the risk of vascular and nerve damage is high. In addition, the operation is long and traumatic, and the patient has a long recovery time after surgery and is under great psychological pressure.

[0003] The domino connector, or domino joint, is a small, "m"-shaped double-hole structure that can connect the fixation rod and the extension rod in parallel, and is a tool that can achieve external extension. In this way, the surgery no longer involves the original fixation segment, and only needs to expose the head end of the old fixation rod and provide an interface for connecting to the extension rod.

[0004] However, the traditional domino connector cannot adjust the height and swing angle, has many surgical restrictions, and reduces the flexibility and accuracy of the surgery.

[0005] Therefore, in view of the defects existing in the above-mentioned prior art, it is necessary to develop a new type of domino connector set for spinal surgery. Summary of the invention

[0006] In order to overcome the defects of the prior art, the present invention proposes a domino connector set for spinal surgery, which can achieve strong fixation between the new rod and the old rod, and improve the flexibility and accuracy of the operation.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A domino connector set for spinal surgery, comprising an angle- and height-adjustable domino connector and a nail-mounted domino connector, wherein the angle- and height-adjustable domino connector comprises a first domino body and a second domino body, and is characterized in that the first domino body is connected to one end of a first connector via a locking pin and the first domino body can be rotated and swung relative to the first connector, the second domino body is connected to the other end of the first connector via a second connector and a snap ring and the second domino body can be rotated and swung relative to the first connector, and the first domino body and the second domino body can be adjusted in horizontal distance, and the nail-mounted domino connector is connected to a pedicle screw.

[0009] Preferably, a spherical connecting hole is provided at the bottom of the first domino body, the first connector includes a connecting rod, one end of the connecting rod is provided with a first connecting column, the upper end of the first connecting column is provided with an expandable connecting ball and a locking hole is provided in the first connecting column, the expandable connecting ball is inserted into the spherical connecting hole, the locking pin includes a locking column and an expanding column connected to the locking column, the locking column cooperates with the locking hole and the expanding column can expand the expandable connecting ball so that the expandable connecting ball is firmly locked in the spherical connecting hole, thereby achieving a firm connection between the first domino body and the first connector.

[0010] Preferably, a threaded column is provided at the lower part of the second domino body, a connecting ring is provided at the other end of the connecting rod, the second connector includes a second connecting column and a clamping portion, a threaded hole is provided in the second connecting column, the threaded column is engaged with the threaded hole to connect the second domino body and the second connector together, the clamping portion is inserted into the connecting ring and the first connector and the second connector are firmly connected together through the clamping ring.

[0011] Preferably, the locking hole is provided with an internal thread, and the locking column is provided with an external thread meshing with the internal thread.

[0012] Preferably, the expandable connecting ball is a four-petal connecting ball and the expanding column is in a truncated cone shape.

[0013] Preferably, an operating hole is provided at the bottom of the locking column and the operating hole is a hexagonal hole.

[0014] Preferably, the upper end of the first domino body is provided with a first U-shaped groove for placing the rod and the first U-shaped groove is provided with a first internal thread to cooperate with the first screw plug to lock the rod, and the upper end of the second domino body is provided with a second U-shaped groove for placing the rod and the second U-shaped groove is provided with a second internal thread to cooperate with the second screw plug to lock the rod.

[0015] Preferably, the nail-on domino connector comprises a sleeve and a third domino body, and the sleeve can be fixed to the top cap of the pedicle screw.

[0016] Preferably, the sleeve and the third domino body are designed with mutually cooperating sliding grooves and racks to achieve height adjustment between the two.

[0017] Preferably, the sleeve can be fixed to the top cap of the pedicle screw by means of a screw plug and a nut.

[0018] Compared with the prior art, the domino connector set for spinal surgery of the present invention has one or more of the following beneficial technical effects:

[0019] 1. The domino connector set of the present invention includes three domino connectors with different functions, which solves the restrictive problems of existing domino connectors during surgery.

[0020] 2. The height and angle adjustable domino connector of the present invention is divided into two left and right domino bodies and two connectors. The left and right domino bodies can realize swing and height adjustment respectively, so that the angle of the rod can be adjusted during use, which is convenient for the insertion of the orthopedic rod and the operation of placing the rod at different heights. At the same time, the left and right domino bodies can realize relative rotation in the horizontal plane, so as to achieve the effect of adjusting the distance between the two domino bodies.

[0021] 3. The nail-fixed domino connector of the present invention can be directly fixed on the screw on one side.

[0022] 4. The height-adjustable domino connector on the nail of the present invention is divided into a domino body and a sleeve. The sleeve can be directly fixed on the screw, and the domino body can slide on the sleeve, thereby realizing height adjustment during use.

[0023] 5. The use of the domino connector of the present invention can improve surgical flexibility and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is an axonometric view of the angle and height adjustable domino connector of the present invention;

[0025] Figure 2 is an axonometric view of the domino connector with adjustable angle and height from another angle of the present invention;

[0026] Figure 3 is an axonometric view of a first domino body of the domino connector with adjustable angle and height of the present invention;

[0027] Figure 4 is an axonometric view of the first domino body of the domino connector with adjustable angle and height according to the present invention from another angle;

[0028] Figure 5 is an axonometric view of a second domino body of the domino connector with adjustable angle and height of the present invention;

[0029] Figure 6 is an axonometric view of a first connector of a domino connector with adjustable angle and height according to the present invention;

[0030] Figure 7 is an axonometric view of the first connector of the domino connector with adjustable angle and height from another angle of the present invention;

[0031] Figure 8 is an axonometric view of a second connector of the domino connector of the present invention with adjustable angle and height;

[0032] Fig. 9 is an axonometric view of a locking pin of a domino connector with adjustable angle and height according to the present invention;

[0033] Fig.10 is an axonometric view of another angle of the locking pin of the domino connector with adjustable angle and height of the present invention;

[0034] Fig.11 is an axonometric view of a clamping ring of a domino connector with adjustable angle and height according to the present invention;

[0035] Fig.12 1 is a schematic diagram showing the comparison of the angle- and height-adjustable domino connector of the present invention before and after the angle and height are adjusted;

[0036] Fig.13 1 is a schematic diagram showing the comparison of the angle- and height-adjustable domino connector of the present invention before and after the horizontal spacing is adjusted;

[0037] Fig.14 is a schematic diagram of a domino connector fixed on a nail of the present invention;

[0038] Fig.15 It is a schematic diagram of the nail-fixed domino connector of the present invention connected with the pedicle screw;

[0039] Fig.16 is a schematic diagram of a nail height-adjustable domino connector of the present invention;

[0040] Fig.17 It is a schematic diagram of the sleeve of the nail height adjustment domino connector of the present invention. DETAILED DESCRIPTION

[0041] Before describing in detail any embodiment of the present invention, it should be understood that the present invention is not limited in its application to the construction and arrangement details of the components set forth in the following description or shown in the following figures. The present invention can have other embodiments and can be practiced or carried out in various ways. In addition, it should be understood that the words and terms used herein are for descriptive purposes and should not be considered restrictive. The use of "including" or "having" and its variations herein is intended to cover the items and their equivalents and additional items displayed below. Unless otherwise specified or limited, the terms "install", "connect", "support" and "couple" and their variations are widely used and cover direct installation and indirect installation, connection, support and connection. In addition, "connect" and "couple" are not limited to physical or mechanical connections or connections.

[0042] Furthermore, on the first aspect, in the disclosure of the present invention, the orientation or positional relationship indicated by terms such as "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or positional relationship shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore the above terms cannot be understood as limitations on the present invention; on the second aspect, the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" cannot be understood as a limitation on the quantity.

[0043] In order to overcome the problem that the existing domino connector cannot adjust the angle and height, thereby limiting the flexibility and accuracy of the operation, the present invention provides a domino connector set for spinal surgery, which can adjust the height and swing angle, thereby achieving a strong fixation between the new rod and the old rod, and can improve the flexibility and accuracy of the operation.

[0044] The domino connector set for spinal surgery of the present invention comprises a domino connector with adjustable angle and height and a nail-on domino connector.

[0045] like Figure 1 and Figure 2 As shown, the angle and height adjustable domino connector of the present invention comprises a first domino body 1 and a second domino body 2. The first domino body 1 and the second domino body 2 are used to connect the old rod and the new rod respectively.

[0046] The first domino body 1 is connected to one end of the first connector 3 through a locking pin 5, and the first domino body 1 can be rotated and swung relative to the first connector 3. At the same time, the second domino body 2 is connected to the other end of the first connector 3 through a second connector 4 and a clamping ring 6, and the second domino body 2 can be rotated and adjusted in height relative to the first connector 3. Therefore, the domino connector of the present invention can achieve height and swing angle adjustment, thereby improving the flexibility and accuracy of surgery.

[0047] Specifically, Figure 4 As shown, the bottom of the first domino body 1 is provided with a spherical connection hole 13. Figure 6 and Figure 7 As shown, the first connecting body 3 includes a connecting rod 31. One end of the connecting rod 31 is provided with a first connecting column 32. The upper end of the first connecting column 32 is provided with an expandable connecting ball 33 and the first connecting column 32 is provided with a locking hole 35. Fig. 9 and Fig.10 As shown, the locking pin 5 includes a locking column 52 and a support column 51 connected to the locking column 52. Figure 1 and Figure 2 As shown, the expandable connecting ball 33 is inserted into the spherical connecting hole 13. The locking column 52 cooperates with the locking hole 35 and the expansion column 51 can expand the expandable connecting ball 33 so that the expandable connecting ball 33 is firmly locked in the spherical connecting hole 13, thereby realizing a firm connection between the first domino body 1 and the first connector 3.

[0048] Preferably, the locking hole 35 is provided with an internal thread, and the locking column 52 is provided with an external thread meshing with the internal thread. Therefore, by twisting the locking column 52, it can move upward along the locking hole 35 and drive the expansion column 51 to move upward. The expansion column 51 is continuously inserted into the expandable connection ball 33 during the upward movement, so that the expandable connection ball 33 is expanded, so that the expandable connection ball 33 is firmly locked in the spherical connection hole 13, thereby realizing a firm connection between the first domino body 1 and the first connector 3.

[0049] More preferably, the expandable connecting ball 33 is a four-petal connecting ball, so that it is easier to expand and more easily to be firmly locked in the spherical connecting hole 13 after expansion.

[0050] More preferably, the expansion column 51 is in a truncated cone shape, so that it is easy to insert into the expandable connecting ball 33 and expand the expandable connecting ball 33 more easily during the insertion process.

[0051] In addition, preferably, an operating hole 53 is provided at the bottom of the locking column 52. For example, the operating hole 53 is a hexagonal hole. Thus, it is convenient to insert an operating instrument, for example, a hexagonal operating rod, into the operating hole 53, so as to facilitate twisting the locking column 52, so as to firmly lock the expandable connecting ball 33 in the spherical connecting hole 13.

[0052] like Figure 5 As shown, the lower part of the second domino body 2 is provided with a threaded column 23. Figure 6 and Figure 7 As shown, the other end of the connecting rod 31 is provided with a connecting ring 34. Figure 8 As shown, the second connecting body 4 includes a second connecting column 41 and a clamping portion 43. A threaded hole 42 is provided in the second connecting column 41. Figure 1 and Figure 2 As shown, the threaded column 23 is engaged with the threaded hole 42 to connect the second domino body 2 with the second connector 4. In addition, the clamping portion 43 is inserted into the connecting ring 34 and the first connector 3 and the second connector 4 are firmly connected together through the clamping ring 6.

[0053] Preferably, if Fig.11 As shown, the snap ring 6 has an opening, so that the snap ring 6 can be easily buckled onto the clamping portion 43, so as to firmly connect the first connector 3 and the second connector 4 together.

[0054] like Figure 3 and Figure 4 As shown, the upper end of the first domino body 1 is provided with a first U-shaped groove 11 for placing a rod, and the first U-shaped groove 11 is provided with a first internal thread 12 to cooperate with the first screw plug to lock the rod. In this way, when in use, the rod (for example, a new rod) is placed horizontally in the first U-shaped groove 11, and the first screw plug is screwed into the first U-shaped groove 11, and the rod can be locked on the first domino body 1 through the first screw plug.

[0055] like Figure 5As shown, the upper end of the second domino body 2 is provided with a second U-shaped groove 21 for placing a rod, and the second U-shaped groove 21 is provided with a second internal thread 22 to cooperate with the second screw plug to lock the rod. In this way, when in use, the rod (for example, an old rod) is placed horizontally in the second U-shaped groove 21, and the second screw plug is screwed into the second U-shaped groove 21, and the rod can be locked on the second domino body 2 through the second screw plug.

[0056] When using the angle and height adjustable domino connector of the present invention, first insert the expandable connection ball 33 into the spherical connection hole 13. Since the first domino body 1 and the first connector 3 are connected by a ball, the rotation angle and the swing angle of the first domino body 1 relative to the first connector 3 can be adjusted, that is, the direction and the tilt angle of the first U-shaped groove 11 can be adjusted. After adjusting the rotation angle and the swing angle of the first domino body 1 relative to the first connector 3, the locking pin 5 is inserted into the locking hole 35, and the locking column 52 is screwed so that it can move upward along the locking hole 35 and drive the expansion column 51 to move upward. The expansion column 51 is continuously inserted into the expandable connection ball 33 during the upward movement, so that the expandable connection ball 33 is expanded, so that the expandable connection ball 33 is firmly locked in the spherical connection hole 13, thereby realizing a firm connection between the first domino body 1 and the first connector 3.

[0057] Then, the threaded column 23 is inserted into the threaded hole 42 of the second connecting column 41. Since the second domino body 2 and the second connecting body 4 are threadedly connected, the height adjustment of the second domino body 2 can be achieved by rotation. After the height of the second domino body 2 is adjusted to the right position, the clamping portion 43 is inserted into the connecting ring 34.

[0058] Next, the second connector 4 is rotated in the connecting ring 34 to adjust the angle of the second domino body 2, that is, the direction of the second U-shaped groove 21. After the angle of the second domino body 2 is adjusted to the right position, the clamping ring 6 is inserted into the clamping portion 43 to achieve a fixed connection between the first connector 3 and the second connector 4.

[0059] Finally, the new and old orthopedic rods are placed in the first U-shaped groove 11 and the second U-shaped groove 21 of the adjusted domino connector respectively and fixed with the first screw plug and the second screw plug.

[0060] like Fig.12As shown, the two domino bodies of the domino connector of the present invention can be swung and adjusted in height, so that the angle of the rod can be adjusted during use, which is convenient for inserting the orthopedic rod and realizing the operation of placing the rod at different heights. Fig.13 As shown, the two domino bodies can achieve relative rotation in the horizontal plane, so that the distance between the two domino bodies can be adjusted. In addition, during the operation, the relative height and angle of the U-shaped grooves on both sides can be adjusted according to the actual situation of the patient. Therefore, the use of the domino connector can improve the flexibility and accuracy of the operation.

[0061] The domino connector on the nail is connected to the pedicle screw. In the operation of extending the fixed segment, the domino connector on the nail can improve the operation efficiency. Fig.14 As shown, the nail-on domino connector includes a sleeve 7 and a third domino body 8.

[0062] like Fig.15 As shown, the sleeve 7 can be fixed to the top cap 11 of the pedicle screw. Specifically, the sleeve 7 can be fixed to the top cap 11 of the pedicle screw through the screw plug 10 and the nut 9. The third domino body 8 is provided with a U-shaped groove for placing a rod, and the operation of extending the fixation stage can be completed by locking with the screw plug.

[0063] Fig.14 The nail-on domino connector shown is a nail-on fixed domino connector. In the case where the height and angle of the rod do not need to be adjusted during surgery, the nail-on fixed domino connector can be used. The connector can be directly installed on the screw through the sleeve 7 and locked by the nut 9 to fix the nail-on domino connector on the screw.

[0064] If you need to adjust the height of the rod during surgery, you can use Fig.16 The nail-on domino connector shown is a nail-on height-adjustable domino connector. Fig.16 and Fig.17 As shown, a slide groove and a rack are provided on one side of the third domino body 8, and a corresponding slide groove and rack are designed on one side of the sleeve 7. The sleeve 7 is installed in the slide groove of the third domino body 8 to achieve relative height adjustment between the two.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Those skilled in the art can modify or replace the technical solution of the present invention according to the idea of ​​the present invention without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A domino connector set for spinal surgery, comprising a domino connector with adjustable angle and height and a nail-on domino connector, wherein the domino connector with adjustable angle and height comprises a first domino body (1) and a second domino body (2), characterized in that: The first domino body (1) is connected to one end of the first connector (3) via a locking pin (5), and the first domino body (1) can be rotated and swung relative to the first connector (3); the second domino body (2) is connected to the other end of the first connector (3) via a second connector (4) and a snap ring (6), and the second domino body (2) can be rotated and adjusted in height relative to the first connector (3), so that the first domino body (1) and the second domino body (2) can achieve horizontal distance adjustment; the nail-on domino connector is connected to a pedicle screw.

2. The domino connector set for spinal surgery according to claim 1, characterized in that: A spherical connecting hole (13) is provided at the bottom of the first domino body (1), the first connector (3) comprises a connecting rod (31), one end of the connecting rod (31) is provided with a first connecting column (32), an expandable connecting ball (33) is provided at the upper end of the first connecting column (32), and a locking hole (35) is provided in the first connecting column (32), the expandable connecting ball (33) is inserted into the spherical connecting hole (13), the locking pin (5) comprises a locking column (52) and an expansion column (51) connected to the locking column (52), the locking column (52) cooperates with the locking hole (35) and the expansion column (51) can expand the expandable connecting ball (33) so that the expandable connecting ball (33) is firmly locked in the spherical connecting hole (13), thereby realizing a firm connection between the first domino body (1) and the first connector (3).

3. The domino connector set for spinal surgery according to claim 2, characterized in that: A threaded column (23) is provided at the lower part of the second domino body (2), a connecting ring (34) is provided at the other end of the connecting rod (31), the second connecting body (4) comprises a second connecting column (41) and a clamping portion (43), a threaded hole (42) is provided in the second connecting column (41), the threaded column (23) is meshed with the threaded hole (42) to connect the second domino body (2) and the second connecting body (4) together, the clamping portion (43) is inserted into the connecting ring (34) and the first connecting body (3) and the second connecting body (4) are firmly connected together through the clamping ring (6).

4. The domino connector set for spinal surgery according to claim 3, characterized in that: The locking hole (35) is provided with an internal thread, and the locking column (52) is provided with an external thread meshing with the internal thread.

5. The domino connector set for spinal surgery according to claim 4, characterized in that: The expandable connecting ball (33) is a four-petal connecting ball and the expanding column (51) is in a truncated cone shape.

6. The domino connector set for spinal surgery according to claim 5, characterized in that: An operating hole (53) is provided at the bottom of the locking column (52), and the operating hole (53) is a hexagonal hole.

7. The domino connector set for spinal surgery according to claim 6, characterized in that: The upper end of the first domino body (1) is provided with a first U-shaped groove (11) for placing a rod, and the first U-shaped groove (11) is provided with a first internal thread (12) so as to cooperate with a first screw plug to lock the rod, and the upper end of the second domino body (2) is provided with a second U-shaped groove (21) for placing a rod, and the second U-shaped groove (21) is provided with a second internal thread (22) so as to cooperate with a second screw plug to lock the rod.

8. The domino connector set for spinal surgery according to any one of claims 1-7, wherein the nail-on domino connector comprises a sleeve (7) and a third domino body (8), and the sleeve (7) can be fixed to the top cap (11) of the pedicle screw.

9. The domino connector set for spinal surgery according to claim 8, characterized in that: The sleeve (7) and the third domino body (8) are designed with sliding grooves and racks that cooperate with each other to achieve height adjustment between the two.

10. The domino connector set for spinal surgery according to claim 9, characterized in that: The sleeve (7) can be fixed to the top cap (11) of the pedicle screw via a screw plug (10) and a nut (9).

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