CN211834666U - Nail plate fixing device for oblique outer side approach operation of spine - Google Patents

Abstract

The utility model discloses an oblique outside approach of backbone operation is with nail board fixing device, include: the connecting plate is provided with more than two fixing holes and more than two pressurizing holes, the more than two fixing holes and the more than two pressurizing holes are respectively arranged at the left end part and the right end part of the connecting plate along the front-back direction, the fixing holes and the pressurizing holes are arranged in a one-to-one correspondence mode, and the inner side wall of each pressurizing hole is provided with a first concave spherical cambered surface; the head of the fixing main nail is arranged in the fixing hole in a penetrating way; the head of the pressurizing auxiliary nail is a spherical head, and the spherical head of the pressurizing auxiliary nail is movably matched with the first spherical cambered surface of the pressurizing hole. The utility model discloses utilize fixed main nail to assist the nail with the pressurization and mutually support, realize fixing device's effective fixed on the connecting plate, can strengthen fixing device's anti-rotation ability, the nail can be assisted with different angles with the pressurization to the connecting plate in the pressurization, realizes its changeable nail angle of putting.

Description

Nail plate fixing device for oblique outer side approach operation of spine

Technical Field

The utility model relates to the field of medical equipment, in particular to oblique outside approach of backbone operation is with nail board fixing device.

Background

At present, spinal related diseases become important diseases affecting the quality and level of life of people, along with continuous innovation of operation technology and concept, oblique lateral lumbar interbody fusion (OLIF) operation reaches the front of the vertebral body side through the gap between the abdominal large vascular sheath and the psoas major muscle, so that the injury of the muscle, ligament and bony structure behind the lumbar is avoided, the occurrence probability of unstable lumbar and residual lumbar back pain of a patient after operation is reduced, meanwhile, the interference to the vertebral canal is avoided, the risk of nerve root injury and adhesion is reduced, and the nerve root injury and the adhesion risk are gradually accepted and recognized by clinicians.

Wherein, internal fixation system is used for carrying out the pressurization to the operation segment and fixes, pressurizes fixedly to the operation segment through internal fixation system, increases operation segment stability, guarantees the good bone grafting fusion environment between the awl, can avoid the fusion cage to sink the complication that the aversion arouses. Most of the existing internal fixing systems adopt posterior pedicle screw rod systems, and the fixing modes have the defects of high incisional height, easy damage to peripheral tissues, too single screw placing angle and difficulty in meeting different fixing effects. In view of the above, there is a need in the art for further improvements in internal fixation systems for oblique lateral lumbar interbody fusion.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a skew outside approach of backbone operation is with nail board fixing device to solve one or more technical problem that exist among the prior art, provide a profitable selection or create the condition at least.

The technical scheme adopted for solving the technical problems is as follows:

a nail plate fixing device for a spinal oblique lateral approach operation comprises: the connecting plate is provided with more than two fixing holes and more than two pressurizing holes, the more than two fixing holes and the more than two pressurizing holes are respectively arranged at the left end part and the right end part of the connecting plate along the front-back direction, the fixing holes and the pressurizing holes are arranged in a one-to-one correspondence mode, and the inner side wall of each pressurizing hole is provided with a first concave spherical cambered surface; the head of the fixing main nail is arranged in the fixing hole in a penetrating way; the head of the pressurizing auxiliary nail is a spherical head, and the spherical head of the pressurizing auxiliary nail is movably matched with the first spherical cambered surface of the pressurizing hole.

Through adopting the flat nail fixing device, utilize to set up the effective fixed of fixing device with pressurization auxiliary nail realization on the connecting plate, the fixed main nail is mutually supported with pressurization auxiliary nail, fixing device's anti-rotation ability can be strengthened, and simultaneously, the first spherical cambered surface clearance fit in the spherical head of pressurization auxiliary nail and pressurization hole, make pressurization auxiliary nail can universal rotation in the pressurization hole, pressurization auxiliary nail can pressurize to the connecting plate with different angles, realize its changeable nail setting angle, can satisfy the internal complicated changeable art of lumbar vertebrae in operation and the motion environment of postoperative, in the time of the use, after confirming the nail feeding point, adjust the nail setting angle of pressurization auxiliary nail, rethread fixed main nail is fixed.

As the further improvement of above-mentioned technical scheme, be equipped with first internal thread in the fixed orifices, first internal thread is from last to the toper screw thread that contracts down, the head of fixed main nail be equipped with the external screw thread that first internal thread matches, the area of contact of toper screw thread multiplicable fixed orifices and fixed main nail increases the stability of fixed main nail laminating fixed orifices.

As a further improvement of the above technical scheme, at least one groove which is through up and down is formed in the outer periphery of the fixing hole, the groove is communicated with the fixing hole, the groove and the fixing hole define a swing-type rotating movable space of the fixing main nail, so that the connecting plate and the fixing main nail can be fixed at different angles, the nail placing angles of the pressurizing auxiliary nail and the fixing main nail can be adjusted, and the pressurizing auxiliary nail and the fixing main nail are matched with each other, so that an operator can select a proper nail placing angle according to the specific requirements of the operation.

As a further improvement of the above technical solution, the inner side wall of the fixing hole is provided with a recessed second spherical arc surface, a C-shaped ring is embedded in the fixing hole, the outer peripheral surface of the C-shaped ring is a spherical surface movably matched with the second spherical arc surface, a second internal thread is arranged in the C-shaped ring, the second internal thread is a tapered thread shrinking from top to bottom, the head of the fixing main nail is provided with an external thread matched with the second internal thread, the C-shaped ring can swing within the second spherical arc surface of the fixing hole by a certain angle without falling out, so that the connecting plate and the fixing main nail are fixed at different nail setting angles through the C-shaped ring, and when in use, the external thread at the head of the fixing main nail is completely screwed into the C-shaped ring to prop the C-shaped ring open, thereby fixing the fixing main nail and the connecting.

As a further improvement of the above technical scheme, a plurality of locking counter bores are further arranged on the connecting plate, the locking counter bores are arranged between the fixing hole and the pressurizing hole, locking nails are rotatably arranged in the locking counter bores, two arc-shaped notches are formed in the outer peripheral edges of the heads of the locking nails, each of the two arc-shaped notches of each of the locking nails is respectively matched with the adjacent fixing main nail and the adjacent pressurizing auxiliary nail, the upper end portions of the fixing main nails and the upper end portions of the pressurizing auxiliary nails are respectively abutted against the lower end portions of the locking nails for limiting, the locking nails are abutted against the heads of the fixing main nails and the pressurizing auxiliary nails for limiting, and the fixing main nails and the pressurizing auxiliary nails can be prevented from being withdrawn from the connecting plate due to external pressure.

As a further improvement of the technical scheme, the distance between the upper end face and the lower end face of the locking nail is not larger than the depth of the locking counter bore, the locking nail and the locking counter bore are designed in a countersunk mode, the cutting trace of the fixing device is effectively reduced, and the damage to peripheral adjacent tissues is avoided.

As a further improvement of the above technical solution, the connecting plate is provided with two fixing holes and two pressurizing holes, the two fixing holes and the two pressurizing holes are respectively arranged at the left end and the right end of the connecting plate at intervals in the front-back direction, the left end and the right end of the connecting plate are both arc-shaped curved surfaces recessed toward the middle of the connecting plate, and the notch of the connecting plate is low.

As a further improvement of the technical scheme, the middle part of the connecting plate is provided with a vertically through perspective window, so that an effective image observation space for postoperative intervertebral bone grafting fusion is ensured.

Drawings

The present invention will be further explained with reference to the drawings and examples;

fig. 1 is a schematic structural diagram of a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of a connection plate according to a first embodiment of the present invention;

fig. 3 is a schematic structural view of a connecting plate according to a second embodiment of the present invention;

fig. 4 is a schematic structural diagram of a connection plate according to a third embodiment of the present invention;

fig. 5 is a schematic cross-sectional view of the connecting plate and the C-shaped ring according to the third embodiment of the present invention, in which a shows a schematic cross-sectional view of the connecting plate and the C-shaped ring when the nail-placing angle is vertical, and B shows a schematic cross-sectional view of the connecting plate and the C-shaped ring when the nail-placing angle is inclined;

fig. 6 is a schematic structural view of the main fixing nail, the auxiliary pressurizing nail and the locking nail provided by the present invention.

In the drawings: 100-connecting plate, 110-fixing hole, 111-groove, 120-pressurizing hole, 130-locking counter bore, 140-perspective window, 200-fixing main nail, 300-pressurizing auxiliary nail, 400-C ring and 500-locking nail.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, if words such as "a plurality" are used, the meaning is one or more, the meaning of a plurality of words is two or more, and the meaning of more than, less than, more than, etc. is understood as not including the number, and the meaning of more than, less than, more than, etc. is understood as including the number.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 to 6, the following embodiments of the nail plate fixing device for the oblique outer side approach operation of the spine of the present invention are made:

fig. 1 and fig. 2 are schematic structural diagrams of a fixing device according to an embodiment of the present invention, two fixing holes 110 and two pressurizing holes 120 are disposed on the connecting plate 100, the left end portion of the connecting plate 100 is disposed at the front-back direction interval of the connecting plate 100 in the two fixing holes 110, the right end portion of the connecting plate 100 is disposed at the front-back direction interval of the connecting plate 100 in the two pressurizing holes 120, and the fixing holes 110 and the pressurizing holes 120 are correspondingly disposed side by side. The inside wall of pressurization hole 120 is equipped with recessed first spherical cambered surface, the diameter of first spherical cambered surface is big-end-up, the head of nail 300 is assisted in the pressurization is spherical head, the nail 300 is assisted in the pressurization promptly for universal screw, the spherical head of nail 300 is assisted in the pressurization and the first spherical cambered surface looks clearance fit of pressurization hole 120, make the head of nail 300 is assisted in the pressurization hole 120 universal rotation, nail 300 is assisted in the pressurization and can pressurize to connecting plate 100 with different angles on, the nail angle of putting of nail 300 is assisted in the pressurization can carry out multi-angle as required and adjust. Wear to be equipped with the fixed main nail 200 in the fixed orifices 110, it is used for fixing device's fixed, the fixed form of bridging is formed together with the connecting plate 100 is fixed to the fixed main nail 200 for the pressure between the upper and lower centrum of transmission, in this embodiment, be equipped with first internal thread in the fixed orifices 110, first internal thread is from last conical thread to shrinking down, the head of the fixed main nail 200 is equipped with the external screw thread that matches with first internal thread, the area of contact of this conical thread multiplicable fixed orifices 110 and fixed main nail 200, increase the stability of the fixed main nail 200 laminating fixed orifices 110. It is understood that the overall shape of the fixing main nail 200 and the pressurizing auxiliary nail 300 are both general screw shapes, the tails of both are provided with external threads extending in the axial direction thereof for screwing them into the vertebral body and providing holding force, and the heads of both are provided with hexagonal recesses 111 for screwing in the screws.

Further, two locking counter bores 130 are further formed in the connecting plate 100, the two locking counter bores 130 are respectively formed between the fixing hole 110 and the pressurizing hole 120 which are adjacently arranged on the front side and the rear side, locking nails 500 are respectively arranged in the two locking counter bores 130, and the depth of the counter bore of each locking counter bore 130 is matched with the screwing depth of the head of the fixing main nail 200 and the screwing depth of the head of the pressurizing auxiliary nail 300. Referring to fig. 6, the outer circumference of the head of the locking nail 500 is provided with two arc-shaped notches, and the two arc-shaped notches of each locking nail 500 are respectively matched with the adjacent fixing main nail 200 and the pressing auxiliary nail 300, so that when in use, after the locking nail 500 is transferred to the connection plate 100, the fixing main nail 200 and the pressing auxiliary nail 300 can be inserted into the corresponding fixing hole 110 and the pressing hole 120 along the arc-shaped notch of the locking nail 500, when all the fixing main nails 200 and the pressurizing auxiliary nails 300 on the coupling plate 100 are inserted into the fixing holes 110 and the pressurizing holes 120 respectively, the positions of the two arc gaps are changed through rotation locking, so that the upper end part of the fixed main nail 200 and the upper end part of the pressurizing auxiliary nail 300 are respectively abutted against and limited with the lower end part of the locking nail 500, namely, the locking pin 500 is restrained at the head of the fixing main pin 200 and the head of the pressurizing auxiliary pin 300 by pressing, the fixing main nail 200 and the pressurizing auxiliary nail 300 are prevented from being pulled out or loosened from the connection plate 100 by external pressure. The locking head may be provided with a cross recess 111 for cooperating with an instrument for rotating the locking pin 500.

Considering the low-notch design of the connecting plate 100, the distance between the upper end face and the lower end face of the locking nail 500 is not greater than the depth of the locking counter bore 130, that is, the locking nail 500 and the locking counter bore 130 are matched by adopting a countersunk design, and since the locking nail 500 is locked at the upper ends of the fixing main nail 200 and the pressurizing auxiliary nail 300, it is indicated that the matching of the fixing main nail 200 and the fixing hole 110 and the matching of the pressurizing auxiliary nail 300 and the pressurizing hole 120 are both of the countersunk design, and compared with a structure convexly arranged on the surface of the connecting plate 100, the notch of the fixing device can be effectively reduced. In addition, the left end face and the right end face of the connecting plate 100 are both arc-shaped curved surfaces which are sunken towards the middle part of the connecting plate 100, and the transition between different end faces adopts arc-shaped surface transition, so that the edge transition of the connecting plate 100 is mild, the notch of the fixing device can be reduced, the low notch design of the fixing device is adopted, and the damage to local sclerotin and soft tissues after the fixing device is implanted is avoided.

Furthermore, the middle part of the connecting plate 100 is provided with a vertically through window 140, and the design of the large window can ensure that the postoperative intervertebral bone grafting fusion obtains an effective image observation space.

In the first embodiment, the first internal threads which are tapered threads and shrink from top to bottom are arranged in the fixing hole 110, the nail placing angle is single, the locking strength is high, but the main fixing nail 200 can only vertically enter the nail. In consideration of the various requirements of the nail placing angle in the operation, the realization mode of realizing the variable nail placing angle of the fixed main nail 200 is respectively shown in fig. 3 and fig. 4.

Fig. 3 is a schematic structural diagram of the connecting plate 100 provided by the embodiment of the present invention, at least one groove 111 that is run through from top to bottom is provided on the outer peripheral edge of the fixing hole 110, the groove 111 is communicated with the fixing hole 110, the groove 111 and the fixing hole 110 define the swing-type rotating activity space of the main fixing nail 200, so that the connecting plate 100 and the main fixing nail 200 can be fixed at different angles, the nail placing angles of the auxiliary pressurizing nail 300 and the main fixing nail 200 can be adjusted, and the two are mutually matched, so that the operator can select a proper nail placing angle according to the specific requirements of the operation. It should be understood that the number of the grooves 111 may be 1, 2 or more according to the size of the fixing hole 110, the cross-sectional shape of the groove 111 may be arcuate, triangular, square, trapezoidal, etc., the groove 111 in fig. 3 is arcuate, and the groove 111 in fig. 3 and the fixing hole 110 are combined to form a petal slot.

Fig. 4 is a schematic structural diagram of a connection plate 100 according to a third embodiment of the present invention. In this embodiment, the inner side wall of the fixing hole 110 is provided with a concave second spherical arc surface, the C-shaped ring 400 is embedded in the fixing hole 110, the outer peripheral surface of the C-shaped ring 400 is a spherical surface movably matched with the second spherical arc surface, a second internal thread is arranged in the C-shaped ring 400, the second internal thread is a tapered thread shrinking from top to bottom, the head of the fixing main nail 200 is provided with an external thread matched with the second internal thread, after the head of the fixing main nail 200 enters the C-shaped ring 400, spherical motion is formed between the C-shaped ring 400 and the connecting plate 100, so that the C-shaped ring 400 can be inclined at a certain angle in the second spherical arc surface of the fixing hole 110 without falling out, and the connecting plate 100 and the fixing main nail 200 realize fixing at different nail setting angles through the. In use, the external thread of the head of the fixing main nail 200 is completely screwed into the C-shaped ring 400 to spread the C-shaped ring 400, thereby fixing the fixing main nail 200 and the connecting plate 100 together. The movable fit between the C-shaped ring 400 and the connecting plate 100 is specifically shown in fig. 5, wherein a represents a cross-sectional view of the connecting plate 100 and the C-shaped ring 400 when the nail setting angle of the fixing main nail 200 is vertical, and B represents a cross-sectional view of the connecting plate 100 and the C-shaped ring 400 when the nail setting angle of the fixing main nail 200 is oblique.

The utility model discloses an embodiment two and embodiment three when using, will fix the main nail 200 earlier tentatively put into the fixed orifices 110, the locking is arranged in locking counter bore 130, the pressurization is put into to the rethread and is assisted nail 300, and the nail angle of putting of the supplementary nail 300 of adjustment pressurization, then the nail angle of putting of the fixed main nail 200 of adjustment is to required angle do further fixed, after all holes all put into the screw on connecting plate 100, rotatory locking nail 500, change the position of two arcs breach on the locking nail 500, make the head that the locking nail 500 pressurization was supported and is leaned on fixed main nail 200 and pressurization is assisted nail 300. Through adopting the plate nail fixing device, utilize fixed main nail 200 to assist nail 300 with the pressurization and mutually support, reinforcing fixing device's anti rotation performance, it fuses to provide stable mechanics environment to plant the bone for the postoperative, simultaneously, the sphere cooperation of pressurization auxiliary nail 300 and pressurization hole 120, make pressurization auxiliary nail 300 can pressurize to connecting plate 100 on with different angles, fixed main nail 200 also can utilize the mode of seting up recess 111 or C shape ring 400 to realize that fixed main nail 200 fixes to connecting plate 100 with different angles, the nail angle of advance of fixed main nail 200 and pressurization auxiliary nail 300 both all can be adjusted according to patient's specific demand, reduce the operation degree of difficulty, and satisfy the internal complicated intraoperative operation of lumbar vertebrae and the motion environment of postoperative.

In addition, the embodiments made by other structures of the fixing device in the second embodiment and the third embodiment can refer to various examples of other structures related to the first embodiment, and various examples are not described herein.

Specifically, the use of the above-described fixing device is described as follows:

s01, determining an operation section and making an operation scheme according to the preoperative X-ray, CT, MRI and other related image data of the patient, and selecting the approximate specification and model of the nail plate system according to preoperative imaging data;

s02, according to the operation plan, adopting the scheme of open operation or operation under the channel, and completing the operations of discectomy, processing of upper and lower cartilage endplates, intervertebral space bone grafting fusion and the like through the operation path;

s03, selecting a nail plate system connecting plate 100 and screws with proper specifications and types according to the disease condition of a patient, grasping the connecting plate 100 by a holding tool to cover the operation fixing section and observing whether the operation fixing section is proper or not;

s04, after the specification of the connecting plate 100 is confirmed and the connecting plate is placed at a proper position, two locking main nails are sequentially placed into the upper vertebral body and the lower vertebral body of the operation section, the angle is adjusted in the placing process, and the locking is not completely performed temporarily;

s05, sequentially placing two pressurizing auxiliary nails 300 into the upper and lower vertebral bodies of the operation section, paying attention to angle adjustment in the placing process, completing pressurizing action after placing, and finally locking the locking main nail and the connecting plate 100;

s06, confirming through the perspective of a C-shaped arm X-ray machine, and if the nail plate system needs to be adjusted, dismantling the nail plate system according to the sequence from S05 to S03;

and S07, completing the above procedures, namely completing the installation of the plate nail system, and completing the operation by assisting other operations.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the details of the embodiments shown, but is capable of various modifications and substitutions without departing from the spirit of the invention.

Claims (8)

1. The utility model provides an oblique outside approach of backbone operation is with nail board fixing device which characterized in that: the method comprises the following steps:

the connecting plate (100) is provided with more than two fixing holes (110) and more than two pressurizing holes (120), the more than two fixing holes (110) and the more than two pressurizing holes (120) are respectively arranged at the left end part and the right end part of the connecting plate (100) along the front-back direction, the fixing holes (110) and the pressurizing holes (120) are correspondingly arranged one by one, and the inner side wall of each pressurizing hole (120) is provided with a first concave spherical cambered surface;

the head of the fixing main nail (200) is arranged in the fixing hole (110) in a penetrating way;

the head of the auxiliary pressurizing nail (300) is a spherical head, and the spherical head of the auxiliary pressurizing nail (300) is movably matched with the first spherical cambered surface of the pressurizing hole (120).

2. The nail plate fixing device for the oblique lateral approach surgery of the spine according to claim 1, characterized in that: be equipped with first internal thread in fixed orifices (110), first internal thread is from last taper thread to shrinking down, the head of fixed main nail (200) be equipped with the external screw thread that first internal thread matches.

3. The nail plate fixing device for the oblique lateral approach surgery of the spinal column according to claim 2, characterized in that: the outer periphery of the fixing hole (110) is provided with at least one groove (111) which is communicated up and down, the groove (111) is communicated with the fixing hole (110), and the groove (111) and the fixing hole (110) define a movable space for the fixed main nail (200) to swing and rotate.

4. The nail plate fixing device for the oblique lateral approach surgery of the spine according to claim 1, characterized in that: the inner side wall of the fixing hole (110) is provided with a concave second spherical cambered surface, a C-shaped ring (400) is embedded into the fixing hole (110), the outer peripheral surface of the C-shaped ring (400) is a spherical surface which is movably matched with the second spherical cambered surface, a second internal thread is arranged in the C-shaped ring (400), the second internal thread is a conical thread which shrinks from top to bottom, and the head of the fixing main nail (200) is provided with an external thread matched with the second internal thread.

5. The nail plate fixing device for the oblique lateral approach surgery of the spinal column according to any one of claims 1 to 4, characterized in that: still be equipped with a plurality of locking counter bores (130) on connecting plate (100), adjacent setting is located in locking counter bore (130) fixed orifices (110) with between pressurization hole (120), rotatable locking nail (500) that is equipped with in locking counter bore (130), two arc breachs have been seted up to the outer peripheral edges of the head of locking nail (500), every two of locking nail (500) the arc breach respectively with adjacent fixed main nail (200) and pressurization are assisted nail (300) and are cooperateed, the upper end of fixed main nail (200) the upper end of pressurization assist nail (300) do not with the lower tip of locking nail (500) supports each other and leans on spacingly.

6. The screw plate fixing device for the oblique lateral approach surgery of the spinal column according to claim 5, characterized in that: the distance between the upper end face and the lower end face of the locking nail (500) is not greater than the depth of the locking counter bore (130).

7. The nail plate fixing device for the oblique lateral approach surgery of the spine according to claim 1, characterized in that: the connecting plate (100) is provided with two fixed orifices (110) and two pressure applying holes (120), two fixed orifices (110) and two pressure applying holes (120) are respectively arranged at the front and back ends of the connecting plate (100) at intervals, and the left end face and the right end face of the connecting plate (100) are arc-shaped curved surfaces sunken in the middle of the connecting plate (100).

8. The nail plate fixing device for the oblique lateral approach surgery of the spine according to claim 1, characterized in that: the middle part of the connecting plate (100) is provided with a vertically through perspective window (140).

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