CN119405410B

CN119405410B - A domino connector set for spinal surgery

Info

Publication number: CN119405410B
Application number: CN202411870667.7A
Authority: CN
Inventors: 王宇; 漆龙涛; 许小波; 宁静; 张小曼; 戈民杰; 谢文静; 刘黎明; 赵晓阳; 郑航; 白昕; 邓文举
Original assignee: Zhejiang Decans Medical Instrument Co ltd
Current assignee: Zhejiang Decans Medical Instrument Co ltd
Priority date: 2024-12-18
Filing date: 2024-12-18
Publication date: 2025-09-30
Anticipated expiration: 2044-12-18
Also published as: CN119405410A

Abstract

The present invention belongs to the technical field of medical devices and relates to a domino connector set for spinal surgery, comprising an angle- and height-adjustable domino connector and a nail-on 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 to one end of a first connector (3) via a locking pin (5) and 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 can be rotated and height-adjusted relative to the first connector (3). 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. The new rod and the old rod can be firmly fixed, thereby improving surgical flexibility and accuracy.

Description

Domino connector set for spinal surgery

Technical Field

The invention belongs to the technical field of medical instruments, relates to a domino connector, and particularly relates to a domino connector assembly for spinal surgery.

Background

Patients with recurrent spinal disease require surgical treatment, often requiring extension of the fixation segments to ensure long-term stability of the spine. In the traditional operation design, in order to prolong the fixing section, the original internal fixing device is required to be completely stripped and exposed, and the fixing rod is required to be replaced, so that the new and old operation sections are connected. However, there are often large amounts of old scar tissue in the secondary surgical area, which is difficult to separate, has poor vision, high risk of vascular and nerve damage, long surgical time, large trauma, long recovery time after the patient's surgery, and large psychological stress.

The domino connector, namely, the domino connector, is a small and exquisite double-hole structure with an'm' -shaped structure, can connect a fixed rod and an extension rod in parallel, and is a tool capable of realizing external extension. In this way, the operation no longer involves the original fixing section, only the head end of the old fixing rod is exposed, and the interface connected with the extension rod is provided.

However, the traditional domino connector cannot realize adjustment of height and swing angle, so that the surgery is more limited, and the flexibility and accuracy of the surgery are reduced.

Accordingly, in view of the above-described deficiencies in the prior art, there is a need to develop a new domino connector stack for spinal surgery.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a domino connector assembly for spinal surgery, which can realize firm fixation between a new rod and an old rod and improve the flexibility and accuracy of the surgery.

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

A domino connector stack for spinal surgery comprising an angle and height adjustable domino connector comprising a first domino body and a second domino body, wherein the first domino body is connected to one end of the first connector by a locking pin and the first domino body is rotatable and swingably adjustable relative to the first connector, the second domino body is connected to the other end of the first connector by a second connector and a snap ring and the second domino body is rotatable and height adjustable relative to the first connector and such that the first and second domino bodies can achieve horizontal distance adjustment, and the on-nail domino connector is connected to a pedicle screw.

Preferably, the bottom of the first domino body is provided with a spherical connecting hole, the first connecting body comprises 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 a spreadable connecting ball and a locking hole is arranged in the first connecting column, the spreadable connecting ball is inserted into the spherical connecting hole, the locking pin comprises a locking column and a spreading column connected with the locking column, the locking column is matched with the locking hole and the spreading column can spread the spreadable connecting ball so that the spreadable connecting ball is firmly locked in the spherical connecting hole, and therefore firm connection between the first domino body and the first connecting body is achieved.

Preferably, the lower part of second domino body is equipped with the screw thread post, the other end of connecting rod is equipped with the go-between, the second connector includes second spliced pole and joint portion, be equipped with the screw hole in the second spliced pole, thereby the screw thread post with the screw hole meshes with the second domino body with the second connector links together, joint portion inserts in the go-between and pass through the snap ring will first connector and second connector firmly link together.

Preferably, an internal thread is arranged in the locking hole, and an external thread meshed with the internal thread is arranged on the locking column.

Preferably, the expandable connecting ball is a four-flap connecting ball and the expansion column is a truncated cone.

Preferably, an operation hole is formed in the bottom of the locking column, and the operation hole is a hexagonal hole.

Preferably, the upper end of the first domino body is provided with a first U-shaped groove for placing the rod, a first internal thread is arranged in the first U-shaped groove so as to be matched with the first screw plug to lock the rod, the upper end of the second domino body is provided with a second U-shaped groove for placing the rod, and a second internal thread is arranged in the second U-shaped groove so as to be matched with the second screw plug to lock the rod.

Preferably, the on-nail domino connector includes a sleeve and a third domino body, the sleeve being securable to a nut of a pedicle screw.

Preferably, the sleeve and the third domino body are provided with a sliding groove and a rack which are matched with each other, so that the height adjustment between the sleeve and the third domino body is realized.

Preferably, the sleeve is secured to the nut of the pedicle screw by a plug and nut.

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

1. The domino connector stack of the present invention includes three different functional domino connectors, solving the problem of limitations of existing domino connectors during surgery.

2. The domino connector with adjustable height and angle is divided into a left domino body, a right domino body and two connecting bodies, wherein the left domino body and the right domino body can swing and adjust the height respectively, so that the angle of a rod can be adjusted in the use process, the rod can be conveniently placed in an orthopedic rod, the rod placing operation with different heights is realized, and meanwhile, the left domino body and the right domino body can realize relative rotation in a horizontal plane, so that the function of adjusting the distance between the two domino bodies is achieved.

3. The domino connector fixed on the screw can be directly fixed on one side of the screw.

4. The domino connector for adjusting the height on the nail is divided into a domino body and a sleeve, the sleeve can be directly fixed on the nail, and the domino body can slide on the sleeve, so that the height adjustment in the use process is realized.

5. The domino connector can improve the flexibility and accuracy of operation.

Drawings

FIG. 1 is an isometric view of an angle and height adjustable domino connector of the present invention;

FIG. 2 is another angular isometric view of the angle and height adjustable domino connector of the present invention;

FIG. 3 is an isometric view of a first domino body of the angle and height adjustable domino connector of the present invention;

FIG. 4 is another angular isometric view of a first domino body of the angle and height adjustable domino connector of the present invention;

Fig. 5 is an isometric view of a second domino body of the angle and height adjustable domino connector of the present invention;

FIG. 6 is an isometric view of a first connector of the angle and height adjustable domino connector of the present invention;

FIG. 7 is another angular isometric view of the first connector of the angle and height adjustable domino connector of the present invention;

FIG. 8 is an isometric view of a second connector of the angle and height adjustable domino connector of the present invention;

FIG. 9 is an isometric view of a locking pin of the angle and height adjustable domino connector of the present invention;

FIG. 10 is another angular isometric view of the locking pin of the angle and height adjustable domino connector of the present invention;

FIG. 11 is an isometric view of a snap ring of the angle and height adjustable domino connector of the present invention;

FIG. 12 is a schematic diagram of a comparative angle and height adjustable domino connector of the present invention, before and after angle and height adjustment;

FIG. 13 is a schematic diagram of a comparative view of an angle and height adjustable domino connector of the present invention before and after horizontal pitch adjustment;

FIG. 14 is a schematic view of the staple-on-secure domino connector of the present invention;

FIG. 15 is a schematic view of the present invention after the fixed-on-nail domino connector is attached to the pedicle screw;

FIG. 16 is a schematic view of the on-nail height-adjustment domino connector of the present invention;

Fig. 17 is a schematic view of the sleeve of the on-nail height-adjustment domino connector of the present invention.

Detailed Description

Before any embodiments of the invention are explained in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings. The invention is capable of other embodiments and of being practiced or of being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of "including" or "having" and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Unless specified or limited otherwise, the terms "mounted," "connected," "supported," and "coupled" and variations thereof are used broadly and encompass both direct and indirect mountings, connections, supports, and couplings. Furthermore, "connected" and "coupled" are not restricted to physical or mechanical connections or couplings.

Also, in the present disclosure, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the azimuth or positional relationships indicated in the drawings, which are merely for convenience of description and to simplify the description, and do not denote or imply that the apparatus or elements in question must have a particular azimuth, be configured and operated in a particular azimuth, and thus the terms should not be construed as limiting the invention, and in the second aspect, the terms "a" and "an" should be construed as "at least one" or "one or more," i.e., in one embodiment, the number of one element may be one, while in another embodiment, the number of the element may be plural, and the term "a" should not be construed as limiting the number.

In order to overcome the problem that the existing domino connector cannot be subjected to angle and height adjustment so that operation flexibility and accuracy are limited, the invention provides a domino connector set for spinal surgery, which can realize adjustment of height and swing angle, so that strong fixation between a new rod and an old rod can be realized, and operation flexibility and accuracy can be improved.

The domino connector stack of the present invention for spinal surgery includes angle and height adjustable domino connectors and on-nail domino connectors.

As shown in fig. 1 and 2, the angle and height adjustable domino connector of the present invention includes a first domino body 1 and a second domino body 2. The first domino body 1 and the second domino body 2 are used for connecting an old rod and a new rod respectively.

The first domino body 1 is connected with one end of the first connector 3 through a locking pin 5, and the first domino body 1 can rotate and swing relative to the first connector 3. Simultaneously, the second domino body 2 is connected with the other end of the first connector 3 through the second connector 4 and the clamping ring 6, and the second domino body 2 can rotate and adjust the height relative to the first connector 3. Therefore, the domino connector can realize the adjustment of the height and the swing angle, thereby improving the flexibility and the accuracy of the operation.

Specifically, as shown in fig. 4, the bottom of the first domino body 1 is provided with a spherical connecting hole 13. Meanwhile, as shown in fig. 6 and 7, the first connecting body 3 includes a connecting rod 31. One end of the connecting rod 31 is provided with a first connecting post 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. Also, as shown in fig. 9 and 10, the locking pin 5 includes a locking post 52 and a spreader post 51 connected to the locking post 52. As shown in fig. 1 and 2, the expandable joint ball 33 is inserted into the spherical joint hole 13. The locking post 52 is matched with the locking hole 35 and the expansion post 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 firm connection between the first domino body 1 and the first connecting body 3.

Preferably, the locking hole 35 is provided with an internal thread, and the locking post 52 is provided with an external thread engaged with the internal thread. Thereby, by screwing the locking post 52, it is enabled to move upward along the locking hole 35 and to bring the spreader post 51 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, and the expandable connection ball 33 is firmly locked in the spherical connection hole 13, thereby realizing the firm connection between the first domino body 1 and the first connector 3.

More preferably, the expandable joint ball 33 is a four-piece joint ball. Thereby making it easier to open and to lock securely in the ball-shaped attachment hole 13 after opening.

Still preferably, the spreader post 51 has a truncated cone shape. Thereby making it easy to insert into the expandable joint ball 33 and to expand the expandable joint ball 33 during insertion.

Further, preferably, the bottom of the locking post 52 is provided with an operating hole 53. For example, the operation hole 53 is a hexagonal hole. Thereby, it is facilitated to insert an operating instrument, for example, a hexagonal operating rod, into the operating hole 53, thereby facilitating screwing of the locking post 52, so as to firmly lock the expandable joint ball 33 in the spherical joint hole 13.

As shown in fig. 5, the lower part of the second domino body 2 is provided with a threaded post 23. As shown in fig. 6 and 7, the other end of the connecting rod 31 is provided with a connecting ring 34. As shown in fig. 8, the second connector 4 includes a second connecting post 41 and a clamping portion 43. The second connecting post 41 is provided with a threaded hole 42 therein. Thus, as shown in fig. 1 and 2, the threaded post 23 engages with the threaded hole 42 to connect the second domino body 2 with the second connector 4. The engaging portion 43 is inserted into the connecting ring 34 and firmly connects the first connecting body 3 and the second connecting body 4 together by the snap ring 6.

Preferably, as shown in fig. 11, the snap ring 6 has an opening. Thereby, the snap ring 6 is easily snapped onto the snap portion 43, so that the first connecting body 3 and the second connecting body 4 are firmly connected together.

As shown in fig. 3 and 4, the upper end of the first domino body 1 is provided with a first U-shaped groove 11 for placing the rod, and the first U-shaped groove 11 is provided with a first internal thread 12 so as to be matched with the first screw plug to lock the rod. Thus, in use, a rod (e.g. a new rod) is placed transversely in the first U-shaped groove 11, and a first screw plug is screwed into the first U-shaped groove 11, so that the rod can be locked on the first minox body 1 through the first screw plug.

As shown in fig. 5, the second U-shaped groove 21 for placing the rod is provided at the upper end of the second domino body 2, and the second U-shaped groove 21 is provided with a second internal thread 22 so as to be matched with the second screw plug to lock the rod. In this way, in use, a rod (for example, an old rod) is placed transversely in the second U-shaped groove 21, and a second screw plug is screwed into the second U-shaped groove 21, so that the rod can be locked on the second minox body 2 through the second screw plug.

In using the angle and height adjustable domino connector of the present invention, the expandable joint ball 33 is first inserted into the spherical joint hole 13. Because 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, that is, the direction and the inclination angle of the first U-shaped groove 11 can be adjusted. After the rotation angle and the swing angle of the first domino body 1 relative to the first connector 3 are adjusted, the locking pin 5 is inserted into the locking hole 35, and the locking post 52 is screwed so that the locking pin can move upwards along the locking hole 35 and drive the expanding post 51 to move upwards. 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, and the expandable connection ball 33 is firmly locked in the spherical connection hole 13, thereby realizing the firm connection between the first domino body 1 and the first connector 3.

Then, the threaded post 23 is inserted into the threaded hole 42 of the second connecting post 41. Because the second domino body 2 and the second connector 4 are in threaded connection, the height of the second domino body 2 can be adjusted by rotation. After the height of the second domino body 2 is adjusted in place, the snap-fit portion 43 is inserted into the connection ring 34.

Next, the second connecting body 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 in place, the snap ring 6 is inserted into the clamping portion 43, so as to achieve the fixed connection between the first connector 3 and the second connector 4.

Finally, the new and old orthopedic rods are placed in the first and second U-shaped grooves 11 and 21 of the adjusted domino connector and are fixed by the first and second plugs, respectively.

As shown in fig. 12, the two domino bodies of the domino connector of the present invention can respectively realize swinging and height adjustment, so that the angle of the rod can be adjusted during use, the orthopedic rod can be conveniently placed, and rod placement operations with different heights can be realized. Furthermore, as shown in fig. 13, relative rotation in the horizontal plane can be achieved between the two domino bodies, so that the distance between the two domino bodies can be adjusted. In addition, the relative height and angle of the U-shaped grooves at two sides can be adjusted according to the actual condition of a patient in the operation process. Thus, surgical flexibility and accuracy may be improved using the domino connector.

The on-nail domino connector is attached to a pedicle screw. In the operation of making an extended fixation section, the use of the on-staple domino connector can improve the efficiency of the operation. As shown in fig. 14, the on-nail domino connector includes a sleeve 7 and a third domino body 8.

As shown in fig. 15, the sleeve 7 may be secured to the nut 11 of the pedicle screw. In particular, the sleeve 7 may be fixed to the nut 11 of the pedicle screw by means of a plug 10 and a nut 9. The third domino body 8 is provided with a U-shaped groove for placing a rod, and the operation of prolonging the fixing stage can be completed by matching with the locking of the screw plug.

The on-nail domino connector shown in fig. 14 is a fixed-on-nail domino connector. Aiming at the condition that the height and angle of the rod do not need to be adjusted in the operation process, the domino connector can be fixed on the nail, can be directly installed on the screw through the sleeve 7 and is locked through the nut 9, and the domino connector on the nail is fixed on the screw.

For cases where the height of the deployment rod needs to be adjusted during surgery, the on-nail domino connector shown in fig. 16, which is an on-nail height adjustment domino connector, may be used. As shown in fig. 16 and 17, a sliding groove and a rack are provided on one side of the third domino body 8, a corresponding sliding groove and a corresponding rack are designed on one side of the sleeve 7, and the sleeve 7 is installed in the sliding groove of the third domino body 8 to realize the relative height adjustment between the two.

Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention, and are not intended to limit the scope of the present invention. Modifications and equivalent substitutions can be made by those skilled in the art based on the present teachings without departing from the spirit and scope of the present teachings.

Claims

1. A domino connector stack for spinal surgery comprising an angle and height adjustable domino connector and a nailed domino connector, the angle and height adjustable domino connector comprising 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 a first connector (3) by a locking pin (5) and the first domino body (1) is rotatable and swingably adjustable with respect to the first connector (3), the second domino body (2) is connected to the other end of the first connector (3) by a second connector (4) and a snap ring (6) and the second domino body (2) is rotatable and height adjustable with respect to the first connector (3) and enables a horizontal distance adjustment of the first and second domino bodies (1, 2) to the nailed domino connector;

The bottom of the first domino body (1) is provided with a spherical connecting hole (13), the first connecting body (3) comprises 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 a spreadable connecting ball (33) and a locking hole (35) is formed in the first connecting column (32), the spreadable connecting ball (33) is inserted into the spherical connecting hole (13), the locking pin (5) comprises a locking column (52) and a spreading column (51) connected with the locking column (52), the locking column (52) is matched with the locking hole (35) and the spreading column (51) can spread the spreadable connecting ball (33) so that the spreadable connecting ball (33) is firmly locked in the spherical connecting hole (13), and firm connection between the first domino body (1) and the first connecting body (3) is realized;

the lower part of second domino body (2) is equipped with screw thread post (23), the other end of connecting rod (31) is equipped with go-between (34), second connector (4) are equipped with screw hole (42) including second spliced pole (41) and joint portion (43) in second spliced pole (41), screw thread post (23) with thereby screw hole (42) meshing will second domino body (2) with second connector (4) are connected together, joint portion (43) are inserted in go-between (34) and pass through snap ring (6) will first connector (3) and second connector (4) are firmly connected together.

2. Domino connector stack for spinal surgery in accordance with claim 1 wherein said locking aperture (35) has internal threads and said locking post (52) has external threads engaged with said internal threads.

3. Domino connector stack for spinal surgery according to claim 2, wherein said distractable connection ball (33) is a four-lobed connection ball and said distracting post (51) is frustoconical.

4. A domino connector stack for spinal surgery as claimed in claim 3, wherein a bottom of said locking post (52) is provided with an operative hole (53) and said operative hole (53) is a hexagonal hole.

5. The domino connector stack for spinal surgery according to claim 4, wherein the upper end of the first domino body (1) is provided with a first U-shaped groove for rod placement and a first internal thread (12) is provided in the first U-shaped groove for engagement with a first screw plug for locking the rod and the upper end of the second domino body (2) is provided with a second U-shaped groove (21) for rod placement and a second internal thread (22) is provided in the second U-shaped groove (21) for engagement with a second screw plug for locking the rod.

6. Domino connector stack for spinal surgery according to any one of claims 1-5, said on-nail domino connector including a sleeve (7) and a third domino body (8), said sleeve (7) being securable to a nut of a pedicle screw.

7. Domino connector stack for spinal surgery according to claim 6, wherein said sleeve (7) and third domino body (8) are designed with mutually cooperating slide grooves and racks for height adjustment between them.

8. Domino connector stack for spinal surgery according to claim 7, wherein said sleeve (7) is fixed to the nut of a pedicle screw by a plug (10) and nut (9).