Orthopedic fixing and mounting system for operation

Abstract

The utility model provides a surgical orthopedics department fixed installation system, including pedicle screws, screw caps and connecting rods, the connecting rods include longitudinal connecting rods and transverse connecting rods, the number of the longitudinal connecting rods is two, the longitudinal connecting rods are arranged in parallel, and a vertical row of pedicle screws are respectively connected in series; the transverse connecting rods are arranged between the two longitudinal connecting rods in parallel, and the width between the transverse connecting rods is adjustable. The pedicle screw is of a hollow structure, and a guide pipe for conveying bone cement is arranged in the pedicle screw. Fixing threads used for being fixed to a bone are arranged outside the fixing sleeve. According to the utility model, the width between the two rows of pedicle screws can be adjusted according to the actual condition of a patient, and the locking is adjusted; when the pedicle screw assembly is used, bone cement is directly injected into the through hole in the screw and dispersed into a vertebral body from the through hole, the bone cement can be injected without detaching a screw feeder from the pedicle screw assembly in the operation process, operation is easy and fast, the operation time can be greatly shortened, and then pain of a patient in the operation process can be relieved.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to a surgical orthopedic fixation and installation system. Background Technology

[0002] Posterior spinal fixation with rods and screws is a well-established spinal surgical procedure used to treat degenerative spinal diseases, fractures, tumors, and infections. It is widely applied to the reduction and fixation of spinal-related conditions such as spinal deformities, disc loss, and spinal fractures. The procedure typically involves inserting pedicle screws (short tail screws, reduction screws, percutaneous screws, cemented screws) through the pedicles and fixing them to the vertebral body. Connecting rods link the various pedicle screws at the surgical site, and locking bolts secure them in place, providing fixation and support.

[0003] Posterior spinal pedicle screw-rod system is a common method in spinal surgery for treating various spinal diseases. The pedicle screw-rod system typically consists of pedicle screws, orthopedic rods, and locking devices. The most commonly used locking device is a nut structure. When locked with a nut, the orthopedic system formed by the pedicle screw-rod system in the posterior spinal path is an inelastic fixation without dynamic stress, leading to slow fracture healing, poor efficacy, and low cure rates.

[0004] Currently, the pedicle screw inserter and bone cement injection channel used in clinical practice are both single instruments and cannot be used in conjunction with each other. That is, after the screw is inserted, the screw inserter is removed, a sleeve is placed in the internal thread of the bone cement pedicle screw, and then an injection sleeve is placed in the sleeve to realize the operation of bone cement pedicle screw. The placement and operation of each special instrument in the surgical procedure is too complicated and cumbersome, which prolongs the operation time. Utility Model Content

[0005] This invention proposes a surgical orthopedic fixation system that can adjust the width between two rows of pedicle screws according to the actual situation, and can deliver bone cement through the pedicle screws.

[0006] The technical solution of this utility model is implemented as follows: a surgical orthopedic fixation system includes pedicle screws, screw heads, and connecting rods. The connecting rods include longitudinal connecting rods and transverse connecting rods. There are two longitudinal connecting rods arranged in parallel, each connecting a vertical row of pedicle screws in series. There are multiple transverse connecting rods arranged in parallel between the two longitudinal connecting rods, and the width between the transverse connecting rods is adjustable.

[0007] The pedicle screw has a hollow structure with a conduit for delivering bone cement inside; and a fixing thread for fixing it to the bone on the outside.

[0008] Preferably, the inner wall of the pedicle screw is a cylindrical cavity, the conduit is a metal tube that matches the shape of the cavity, and the lower end of the conduit is threadedly connected to the inner wall of the pedicle screw.

[0009] Preferably, the middle and upper parts of the inner wall of the pedicle screw are smooth contact surfaces for installing the catheter, the lower part is an internal thread for installing the catheter, and the lower end of the catheter is provided with an internal thread and a matching external thread.

[0010] Preferably, the lower end of the catheter is flush with the outlet of the lower end of the pedicle screw, the upper end of the catheter protrudes from the upper end of the pedicle screw and the screw cap and extends outward, and is provided with an adapter for connection and cooperation with external pipelines.

[0011] Preferably, the nail cap is positioned above the pedicle screw and fixedly connected, and a fixing sleeve for connecting the longitudinal connecting rod is provided on the side of the nail cap, and a threaded locking cap is provided at the opening of the fixing groove.

[0012] Preferably, the lower end sidewall of the nail head has several mounting through holes, and the end sidewall of the pedicle screw has several corresponding mounting screw holes, with matching mounting screws provided in the mounting screw holes.

[0013] Preferably, the longitudinal connecting rod is provided with several connectors, and two adjacent connectors on the same horizontal line form a group, and each group of adjacent connectors is connected by a transverse connecting rod.

[0014] Preferably, of the two adjacent connectors, one is a fixed connector and the other is an adjustable connector; the fixed connector is fixedly connected to the transverse link, and the adjustable connector is locked to the transverse link by a knob.

[0015] Preferably, the adjustable connector has a horizontal connecting through hole and a fixing screw hole perpendicular to the connecting through hole, the transverse connecting rod passes through the connecting through hole, and the knob passes through the fixing screw hole through a screw fixedly connected to it.

[0016] Preferably, the fixed connector and the adjustable connector are alternately arranged on the same longitudinal link.

[0017] Compared with the prior art, the advantages of this utility model are: the width between the two rows of pedicle screws can be adjusted and locked according to the patient's actual situation; bone cement can also be injected directly into the through hole on the screw through the delivery hole of the screw inserter and diffused into the vertebral body through the through hole using the bone cement injection device. During the operation, the screw inserter does not need to be removed from the pedicle screw assembly to inject bone cement. The operation is simple and quick, which can greatly reduce the operation time and thus reduce the patient's pain during the operation. Attached Figure Description

[0018] Figure 1 This is a side view of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the longitudinal structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the pedicle screw and catheter portion of this utility model;

[0021] Figure 4 for Figure 3 Enlarged diagram of part A in the middle.

[0022] In the diagram: 1. Pedicle screw; 2. Screw cap; 3. Longitudinal connecting rod; 4. Transverse connecting rod; 5. Conduit; 6. Adapter; 7. Fixing sleeve; 8. Threaded locking cap; 9. Mounting screw; 10. Fixing connector; 11. Adjustable connector; 12. Knob; 101. Internal thread; 102. Fixing thread; 501. External thread. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] Example: See Figure 1 , Figure 2 and Figure 3A surgical orthopedic fixation system includes pedicle screws 1, screw caps 2, and connecting rods. The connecting rods include longitudinal connecting rods 3 and transverse connecting rods 4. There are two longitudinal connecting rods 3 arranged in parallel, each connecting a vertical row of pedicle screws 1 in series. There are multiple transverse connecting rods 4 arranged in parallel between two longitudinal connecting rods 3, and the width between the transverse connecting rods 4 is adjustable. The longitudinal connecting rods 3 and transverse connecting rods 4 can be adjusted according to the actual condition of the patient's bones, thereby adjusting the width between the two rows of pedicle screws 1, and then adjusting and locking to facilitate surgical operation.

[0027] The pedicle screw 1 has a hollow structure, with a conduit 5 for delivering bone cement inside; and a fixing thread 102 for fixing it to the bone on the outside.

[0028] The inner wall of the pedicle screw 1 is a cylindrical cavity, and the conduit 5 is a metal tube that matches the shape of the cavity. The lower end of the conduit 5 is threaded to the inner wall of the pedicle screw 1.

[0029] Figure 4 In the pedicle screw 1, the middle and upper parts of the inner wall are smooth contact surfaces for installing the conduit 5, and the lower part is the internal thread 101 for installing the conduit 5. The lower end of the conduit 5 is provided with the internal thread 101 and the matching external thread 501.

[0030] The lower end of the catheter 5 is flush with the outlet position of the lower end of the pedicle screw 1, the upper end of the catheter 5 protrudes from the upper end of the pedicle screw 1 and the screw cap 2 and extends outward, and is provided with an adapter 6 for connection and cooperation with external pipelines.

[0031] The nail cap 2 is positioned above the pedicle screw 1 and fixedly connected. The side of the nail cap 2 is provided with a fixing sleeve 7 for connecting the longitudinal connecting rod 3, and a threaded locking cap 8 is provided at the opening of the fixing groove.

[0032] The lower side wall of the nail head 2 has several through holes for installation, and the side wall of the pedicle screw 1 has several corresponding screw holes for installation. The screw holes are equipped with matching screws 9.

[0033] The longitudinal connecting rod 3 is provided with several connectors. Two adjacent connectors on the same horizontal line form a group, and each group of adjacent connectors is connected by a transverse connecting rod 4.

[0034] Of the two adjacent connectors, one is a fixed connector 10 and the other is an adjustable connector 11; the fixed connector 10 is fixedly connected to the transverse link 4, and the adjustable connector 11 is locked to the transverse link 4 by a knob 12.

[0035] The adjustable connector 11 has a horizontal connecting through hole and a fixing screw hole perpendicular to the connecting through hole. The transverse connecting rod 4 passes through the connecting through hole, and the knob 12 passes through the fixing screw hole through a screw fixedly connected to it.

[0036] The fixed connector 10 and the adjustable connector 11 are alternately arranged on the same longitudinal link 3.

[0037] During installation, the pedicle screw 1 needs to be fixed to the spine first. It is fixed to the spine using the fixing thread 102. When adjusting the position between the pedicle screws 1, simply adjust the fixing sleeve 7 on the screw head 2 so that the longitudinal connecting rod 3 slides relative to the fixing sleeve 7. After determining the position, the longitudinal connecting rod 3 is locked by rotating the threaded locking cover 8 against the inner wall of the fixing sleeve 7. In this way, the pedicle screw 1 is fixed in position on the longitudinal connecting rod 3.

[0038] When it is necessary to adjust the relative distance between the two longitudinal connecting rods 3, adjust the adjustable connector 11 on the longitudinal connecting rod 3, loosen the knob 12, and then move the position of the transverse connecting rod 4 so that the distance between the fixed connector 10 and the adjustable connector 11 on the other side of the transverse connecting rod 4 is narrowed or widened. Then tighten the knob 12 on the adjustable connector 11 and lock the transverse connecting rod 4 with the screw. In this way, the relative distance between the two longitudinal connecting rods 3 is adjusted, so that the positions of the two adjacent pedicle screws 1 in the same horizontal row are adjusted.

[0039] When bone cement needs to be injected into the vertebral body, the catheter 5 is passed through the inner wall of the pedicle screw 1 and the screw cap 2. The external thread 501 at the bottom of the catheter 5 is tightened to fit the internal thread 101 of the pedicle screw 1. The adapter 6 at the upper end of the catheter 5 is connected to an external bone cement injection device. Then, the bone cement is injected directly into the through hole at the end of the pedicle screw 1 through the adapter 6 and the catheter 5 using the bone cement injection device, and then diffuses into the vertebral body through the through hole. During the operation, the screw holder does not need to be removed from the pedicle screw 1 assembly for bone cement injection. The operation is simple and quick, which can greatly reduce the operation time and thus reduce the patient's pain during the operation.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A surgical orthopedic fixation mounting system comprising a pedicle screw, a screw cap, and a link, characterized in that: The connecting rod comprises longitudinal connecting rods and transverse connecting rods, the longitudinal connecting rods are two and arranged in parallel, and each longitudinal connecting rod connects a vertical row of pedicle screws in series; the transverse connecting rods are multiple and arranged in parallel between the two longitudinal connecting rods, and the width between the transverse connecting rods is adjustable. The pedicle screw is a hollow structure, and a catheter for conveying bone cement is arranged in the pedicle screw; and a fixing thread for fixing on a bone is arranged outside the pedicle screw.

2. A surgical orthopedic fixation mounting system according to claim 1, wherein: The inner wall of the pedicle screw is a cylindrical cavity, the catheter is a metal tube matched with the shape of the cavity, and the lower end of the catheter is threadedly connected with the inner wall of the pedicle screw.

3. A surgical orthopedic fixation mounting system according to claim 2, wherein: The middle and upper parts of the inner wall of the pedicle screw are smooth contact surfaces for mounting the catheter, and the lower part is an internal thread for mounting the catheter, and the lower end of the catheter is provided with an internal thread matched with an external thread.

4. A surgical orthopedic fixation mounting system as defined in claim 3, wherein: The lower end of the catheter is flush with the outlet position of the lower end of the pedicle screw, the upper end of the catheter protrudes from the upper end of the pedicle screw and the cap and extends outward, and is provided with an adapter matched with an external pipeline.

5. A surgical orthopedic fixation mounting system according to claim 1, wherein: The cap is arranged above the pedicle screw and fixedly connected, the side surface of the cap is provided with a fixing sleeve connected with the longitudinal connecting rod, and a threaded locking cover is arranged at the opening of the fixing sleeve.

6. A surgical orthopedic fixation mounting system according to claim 5, wherein: A plurality of mounting through holes are arranged on the side wall of the lower end of the cap, a plurality of corresponding mounting screw holes are arranged on the side wall of the lower end of the pedicle screw, and mounting screws matched with the mounting screw holes are arranged on the mounting screw holes.

7. A surgical orthopedic fixation mounting system according to claim 1, wherein: A plurality of connectors are arranged on the longitudinal connecting rod, two adjacent connectors on the same horizontal line form a group, and the adjacent connectors in each group are connected through the transverse connecting rod.

8. A surgical orthopedic fixation mounting system according to claim 7, wherein: Of the two adjacent connectors, one is a fixed connector, and the other is an adjustable connector; the fixed connector is fixedly connected with the transverse connecting rod, and the adjustable connector is rotatably connected with the transverse connecting rod through a knob.

9. A surgical orthopedic fixation mounting system according to claim 8, wherein: The adjustable connector is provided with a horizontal connecting through hole and a fixing screw hole perpendicular to the connecting through hole, the transverse connecting rod penetrates through the connecting through hole, and the knob penetrates through the fixing screw hole through the screw fixedly connected with the knob.

10. A surgical orthopedic fixation mounting system according to claim 9, wherein: The fixed connector and the adjustable connector are alternately arranged on the same longitudinal connecting rod.

Images