CN116439807A

CN116439807A - Spinal serious deformity correction instrument and system

Info

Publication number: CN116439807A
Application number: CN202310407871.4A
Authority: CN
Inventors: 冯兰瑞; 王朋鹤; 张勋; 甄超; 段红平
Original assignee: Beijing Naton Medical Technology Holdings Co Ltd
Current assignee: Beijing Naton Medical Technology Holdings Co Ltd
Priority date: 2023-04-17
Filing date: 2023-04-17
Publication date: 2023-07-18

Abstract

The invention discloses a spine severe deformity correction instrument and a system, and belongs to the technical field of medical instruments, wherein the spine severe deformity correction instrument comprises a lifting screw holder and a fixed screw holder, the lifting screw holder is used for connecting and fixing pedicle screws of a spine severe deformity section, and a lifting cross connection is arranged on the lifting screw holder; the fixed screw holder is used for connecting and fixing pedicle screws of the section with normal curvature of the spine, and a fixed transverse link is arranged on the fixed screw holder; the side surfaces of the lifting screw holder and the fixed screw holder are provided with support rods which are horizontally arranged, and the spinal serious deformity correcting instrument further comprises a connector. The apparatus and the system for correcting the serious deformity of the spine can be suitable for treating the serious deformity of the spine, and the strength and the accuracy in the operation process are controllable.

Description

Spinal serious deformity correction instrument and system

Technical Field

The invention relates to the technical field of medical appliances, in particular to a device and a system for correcting serious deformity of a spine.

Background

Spinal deformity refers to abnormal changes in morphology due to deviation of the lines of force of the spine from normal positions in coronal, sagittal, and axial positions, and is collectively referred to as spinal deformity, wherein when the angle of the spinal deformity is greater than 90 degrees, the patient is referred to as severe deformity of the spine, and at the same time, the patient is often accompanied with symptoms such as back stiffness, dyspnea, hip pain, limited movement, and the like, and when the angle of the spinal deformity of the patient is greater than 135 degrees, the patient is referred to as extremely severe deformity. Patients with general severe deformities often have some characteristics: such as small age, early onset, rapid progression of deformity, severe lung injury, weak body, stiff deformity, difficult orthopedic surgery, and the like.

The spinal deformity can be divided into scoliosis, kyphosis deformity and the like, for serious deformity, the scheme of operation treatment can only be adopted at present, the treatment can be generally carried out through spine osteotomy correction and combination with a posterior internal fixation system, for particularly serious deformity, the stage operation is often required, the aim of reducing the complication of the operation is fulfilled, and the recovery of a patient is facilitated, so that the deformity of the patient, the local function loss and the like caused by the deformity are further corrected.

The traditional spine deformity is reset by fixing traction or manually prizing, expanding, compressing and the like in operation, but the mode is often suitable for slight slipping, difficult to recover when serious deformity is dislocated, and the traditional orthopedic mode is not suitable for serious deformity diseases of the spine, and has the problems of uncontrollable strength and accuracy and the like in the operation process.

Disclosure of Invention

The invention aims to solve the technical problem of providing a device and a system for correcting the serious deformity of the spine, which are applicable to the serious deformity of the spine and have controllable strength and accuracy in the operation process.

In order to solve the technical problems, the invention provides the following technical scheme:

In one aspect, there is provided a spinal serious deformity correction device comprising a lifting screw holder and a fixed screw holder, wherein:

the lifting screw holder is used for connecting and fixing pedicle screws of the severe spinal deformity segment, and a lifting cross link which can move along the axial direction of the lifting screw holder after being driven is arranged on the lifting screw holder;

the fixed screw holder is used for connecting and fixing pedicle screws of the section with normal curvature of the spine, and a fixed transverse connection is arranged on the fixed screw holder;

the side of lifting screw is held and is got ware and fixed screw is held and is got the bracing piece that the ware was equipped with the level and set up, serious deformity correction apparatus of backbone still includes and is used for with the terminal of lifting cross-section and fixed cross-section is connected to respectively the connector of bracing piece.

Further, the lifting screw holder comprises a threaded pipe, a pair of first elastic arms are arranged at the lower end of the threaded pipe, and a first sliding retaining sleeve for driving the pair of first elastic arms to clamp the pedicle screw is sleeved at the lower part of the threaded pipe.

Further, the inner sides of the lower parts of the pair of first elastic arms are provided with first limiting tables matched with lifting reset grooves on two sides of the upper end of the pedicle screw;

And/or, be equipped with the first spout that extends along its length direction on the screwed pipe, the lower part of screwed pipe is equipped with the vertical intercommunication first spout and a pair of first cover spacing groove that the interval set up, the protruding first spacing fender platform that is equipped with of upper end of first slip fender cover is in the first spout and with first cover spacing groove matched with, works as when first spacing fender platform is located the first cover spacing groove on the upper position, a pair of first elastic arm loosens pedicle of vertebral arch screw, works as first spacing fender platform is located the first cover spacing groove that the position is down, a pair of first elastic arm centre gripping pedicle of vertebral arch screw.

Further, the lifting cross joint comprises a first cross joint main sleeve which is arranged on the threaded pipe in a sliding sleeve mode, a driving nut which is matched with the threaded pipe in a threaded mode is axially positioned and rotatably assembled at the circumferential direction at the upper end of the first cross joint main sleeve, a first fixing rod is arranged on the outer side wall of the first cross joint main sleeve, and a connector is used for connecting the tail end of the first fixing rod to the supporting rod.

Further, the outer surface of the upper end of the first transverse connection main sleeve and the outer surface of the lower end of the driving nut are respectively provided with a connecting clamping groove, and a clamping ring with a C-shaped section is arranged in the connecting clamping groove of the first transverse connection main sleeve and the connecting clamping groove of the driving nut so as to axially position the driving nut and circumferentially and rotatably assemble the driving nut on the first transverse connection main sleeve;

And/or the internal thread of the drive nut and the external thread of the threaded pipe are left-handed threads which are matched with each other;

and/or the driving nut is in a regular polygon shape or a plum blossom shape.

Further, the apparatus for correcting serious deformity of spine further comprises a driving sleeve sleeved on the lifting screw holder for driving the lifting screw holder to move in a transverse connection manner relative to the lifting.

Further, the driving sleeve comprises a sleeve main body part which is arranged on the threaded pipe in a sliding sleeve mode, a nut clamping groove matched with a driving nut of the lifting cross-connection is formed in the inner side of the front end of the sleeve main body part, and the driving sleeve can drive the driving nut to rotate relative to the threaded pipe.

Further, a driving handle is arranged at the rear end of the sleeve main body part;

and/or the sleeve main body part is provided with an indication slot extending along the length direction;

and/or the nut clamping groove is in a regular polygon shape or a plum blossom shape.

Further, the fixed screw holder comprises a light pipe, a pair of second elastic arms are arranged at the lower end of the light pipe, and a second sliding blocking sleeve for driving the pair of second elastic arms to clamp the pedicle screw is sleeved at the lower part of the light pipe.

Further, the inner sides of the lower parts of the pair of second elastic arms are provided with second limiting tables matched with lifting reset grooves on two sides of the upper end of the pedicle screw;

and/or a second chute extending along the length direction of the light pipe is arranged on the light pipe, a pair of second stop sleeve limiting grooves which are vertically communicated with the second chute and are arranged at intervals are arranged at the lower part of the light pipe, a second limiting baffle table which is connected in the second chute in a sliding manner and matched with the second stop sleeve limiting grooves is convexly arranged at the upper end of the second sliding stop sleeve, when the second limiting baffle table is positioned in the second stop sleeve limiting groove positioned above, the pair of second elastic arms loosen pedicle screws, and when the second limiting baffle table is positioned in the second stop sleeve limiting groove positioned below, the pair of second elastic arms clamp the pedicle screws;

and/or the fixed cross-connection comprises a second cross-connection main sleeve which is sleeved on the light pipe, a locking screw used for extruding and fixing the light pipe is arranged on the side wall of the second cross-connection main sleeve in a penetrating manner, a second fixing rod is further arranged on the outer side wall of the second cross-connection main sleeve, and the connector is used for connecting the tail end of the second fixing rod to the supporting rod;

And/or, the serious deformity correcting instrument for the spine further comprises an extension sleeve which is sleeved on the light pipe, wherein an inner hole of the extension sleeve comprises a large-diameter section positioned at the lower part and a small-diameter section positioned at the upper part, the inner diameter of the large-diameter section is larger than or equal to the outer diameter of the light pipe, and the inner diameter of the small-diameter section is smaller than the outer diameter of the light pipe, so that a limit table matched with the upper end of the light pipe is formed at the joint of the large-diameter section and the small-diameter section.

Further, the connector sequentially comprises an upper female buckle, a male buckle and a lower female buckle from top to bottom, wherein the side surfaces of the upper female buckle and the male buckle are respectively provided with an upper female buckle holding rod circular arc and an upper male buckle holding rod circular arc which are mutually matched, so that an upper holding rod groove is formed, the side surfaces of the lower female buckle and the male buckle are respectively provided with a lower female buckle holding rod circular arc and a lower male buckle holding rod circular arc which are mutually matched, so that a lower holding rod groove is formed, and the connector further comprises a locking piece used for axially locking and fixing the upper female buckle, the male buckle and the lower female buckle.

Further, the male buckle comprises an upper male buckle and a lower male buckle, the upper male buckle is provided with an arc of an upper male buckle holding rod, the lower male buckle is provided with an arc of a lower male buckle holding rod, and the opposite end surfaces of the upper male buckle and the lower male buckle are provided with meshing teeth;

And/or, at least two positioning teeth are arranged in the arc of the upper male buckle holding rod and the arc of the lower male buckle holding rod;

and/or the matching end surfaces of the upper female buckle and the male buckle and the matching end surfaces of the lower female buckle and the male buckle are L-shaped;

and/or, the axis of the upper rod holding groove is intersected with the axis of the lower rod holding groove.

Further, the retaining member includes passing in proper order go up box, pin thread and lower box and threaded connection down the locking bolt of box, wherein:

the lower end of the locking bolt is provided with a bolt bottom nail, and the lower end of the lower female buckle is provided with a bolt bottom nail clearance hole;

and/or the rod part of the locking bolt is sleeved with a driving ring above the upper female buckle, the upper end of the upper female buckle is provided with a driving ring groove, and the lower surface of the driving ring and the inner surface of the driving ring groove are spherical surfaces or inclined surfaces which are matched with each other.

Further, the spinal serious deformity correction device further comprises an unlocking device for unlocking the lifting screw holder or the fixed screw holder, and the unlocking device can drive the first sliding retaining sleeve or the second sliding retaining sleeve to rotate so as to separate the first elastic arm or the second elastic arm from the pedicle screw.

Further, the unlocking device comprises a driving cap, a connecting arm and a sliding blocking arm which are sequentially connected from top to bottom, a through hole for the threaded pipe or the light pipe to pass through is formed in the driving cap, and a lifting groove matched with the first limiting blocking table or the second limiting blocking table is formed in the sliding blocking arm, wherein:

the lower end of the sliding baffle arm is provided with a baffle table inlet communicated with the middle part of the lifting groove, so that a lifting arm is respectively formed at the left side and the right side below the lifting groove;

and/or the connecting arm sequentially comprises a straight arm section and an inward inclined arm section from top to bottom.

In another aspect, a system for correcting severe spinal deformities is provided, comprising pedicle screws and the above-mentioned apparatus for correcting severe spinal deformities, wherein the pedicle screws are unidirectional nails or universal nails.

The invention has the following beneficial effects:

the spine severe deformity correction device comprises a lifting screw holder for connecting and fixing pedicle screws of a spine severe deformity section and a fixed screw holder for connecting and fixing pedicle screws of a spine curvature normal section, wherein lifting cross joints and fixed cross joints are respectively arranged on the lifting screw holder and the fixed screw holder, and the spine severe deformity correction device further comprises a connector for respectively connecting the lifting cross joints and the fixed cross joints to a horizontally arranged supporting rod.

Drawings

FIG. 1 is a schematic illustration of the physiological curvature of the spine of a normal human body;

FIG. 2 is a schematic representation of the physiological curvature of the spine of a patient suffering from severe spinal deformities;

FIG. 3 is a schematic view of the overall structure of the spinal serious deformity correction system according to the present invention;

FIG. 4 is a top view of FIG. 3;

FIG. 5 is a left side view of FIG. 3;

figure 6 is a schematic view of the lifting screw holder of figure 3, wherein (a) is a front view, (b) is a cross-sectional view of (a), and (c) is a side view of (a);

FIG. 7 is a schematic view of the elevating cross-section of FIG. 3, wherein (a) is a perspective view and (b) is a front sectional view of (a);

FIG. 8 is a schematic view of the driving sleeve in FIG. 3, wherein (a) is a perspective view in one direction and (b) is a perspective view in another direction;

FIG. 9 is a schematic view of the structure of the fixed screw holder of FIG. 3, wherein (a) is a front view, (b) is a cross-sectional view of (a), and (c) is a side view of (a);

FIG. 10 is a schematic view of the stationary cross-section of FIG. 3, wherein (a) is a perspective view in one direction and (b) is a perspective view in the other direction;

FIG. 11 is a schematic view of the structure of the extension sleeve of FIG. 3, wherein (a) is a front view and (b) is a cross-sectional view of (a);

fig. 12 is a schematic structural view of the connector of fig. 3, wherein (a) is a front view in one direction, (b) is a cross-sectional view of (a), (c) is a front view in the other direction, (d) is a cross-sectional view of (c), (e) is a top view of (a), and (f) is a bottom view of (a);

FIG. 13 is a schematic view of the structure of the unlocking device in FIG. 3, wherein (a) is a perspective view and (b) is a side view of (a);

FIG. 14 is a schematic view of the pedicle screw of FIG. 3 as a one-way screw, wherein (a) is a front view of the short tail screw, (b) is a side view of (a), (c) is a front view of the long tail screw, and (d) is a side view of (c);

FIG. 15 is a schematic view of the pedicle screw of FIG. 3 as a gimbaled pin, wherein (a) is a front view of the short tail pin, (b) is a side view of (a), (c) is a front view of the long tail pin, and (d) is a side view of (c);

fig. 16 is a schematic view of the principle of use of the spinal serious deformity correction system of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

The physiological curvature of the spine of a normal human body is shown in fig. 1, and the physiological curvature of the spine of a patient suffering from serious deformity of the spine is shown in fig. 2, and most of the patients in this situation are suffering in life. At present, no special correction instrument for solving and treating diseases with serious deformity exists in the market, or the existing correction instrument for treating the serious deformity of the spine is complex in structure and complex in operation, brings great inconvenience to medical staff, and also increases risk hidden trouble of patients in operation.

In one aspect, the present invention provides a spinal serious deformity correction device, as shown in fig. 3-16, comprising a lifting screw holder 1 and a fixed screw holder 2, wherein:

the lifting screw driver 1 is used to attach pedicle screws 3 fixed to severe deformity segments of the spine, the lifting type screw holder 1 is provided with a lifting cross 4 which can move along the axial direction of the lifting type screw holder 1 after being driven;

the fixed screw holder 2 is used for connecting and fixing pedicle screws 3 of the section with normal curvature of the spine, and a fixed cross-connection 5 is arranged on the fixed screw holder 2;

the side surfaces of the lifting screw holder 1 and the fixed screw holder 2 are provided with a horizontally arranged supporting rod 6, and the spine severe deformity correcting instrument further comprises a connector 7 for respectively connecting the tail ends of the lifting cross-link 4 and the fixed cross-link 5 to the supporting rod 6.

Further, the apparatus for correcting serious deformity of vertebral column can further comprise a driving sleeve 8 sleeved on the lifting screw holder 1 to drive the lifting screw holder 1 to move relative to the lifting cross-link 4.

When the device is used, firstly, pedicle screws 3 are respectively beaten on a severe malformed section of a patient and vertebral bodies of adjacent normal sections before and after the severe malformed section, then, the lifting screw holder 1 is connected and fixed to the pedicle screws 3 of the severe malformed section of the spine, preparation is made for the subsequent severe malformed resetting operation, the fixed screw holder 2 is connected and fixed to the pedicle screws 3 of the normal section of the curvature of the spine, the lifting screw holder 1 and the fixed screw holder 2 are respectively connected by the lifting cross 4 and the fixed cross 5, the tail ends of the lifting cross 4 and the fixed cross 5 are respectively connected to a support rod 6 which is horizontally arranged by the connector 7, then, a driving sleeve 8 is sleeved on the lifting screw holder 1 and drives the lifting screw holder 1 to move relative to the lifting cross 4, the pedicle screws 3 which are connected and fixed by the lifting screw holder 1 are further moved (see arrow direction in fig. 16) so as to perform resetting operation, finally, a shaped connecting rod (such as a titanium rod) passes through a U-shaped bolt seat 31 and a screw 3 and a fixed plug 3, namely, a locking screw is formed by the lifting screw holder 3 and a fixed plug 3 is screwed into a fixed screw 3, and a locking system is formed by the fixed screw 3, namely, a plug 3 is screwed into a fixed screw hole (a fixed screw 3) through the pedicle screw is formed by the lifting screw 3).

The spine severe deformity correction device comprises a lifting screw holder for connecting and fixing pedicle screws of a spine severe deformity section and a fixed screw holder for connecting and fixing pedicle screws of a spine curvature normal section, wherein lifting cross joints and fixed cross joints are respectively arranged on the lifting screw holder and the fixed screw holder, and the spine severe deformity correction device further comprises a connector for respectively connecting the lifting cross joints and the fixed cross joints to a horizontally arranged supporting rod. The invention is suitable for spinal column orthopedic surgery, in particular for severe deformity surgery.

The spine severe deformity correction device has simple and practical structure, is fluent and smooth in cooperation with a device tool, has high safety coefficient, can not only meet the treatment of patients suffering from spine severe deformity, but also be used for conventional spine slipping, lateral bending and other orthopedic operations.

The lifting screw holder 1 can take various forms as will be readily apparent to those skilled in the art, such as a conventional pedicle screw holder sleeve, however, for ease of implementation, the present invention preferably takes the following form:

as shown in fig. 6, the lifting screw holder 1 may include a threaded tube 11, a pair of first elastic arms 12 are provided at a lower end of the threaded tube 11, and a first sliding blocking sleeve 13 for driving the pair of first elastic arms 12 to clamp the pedicle screw 3 is sleeved at a lower portion of the threaded tube 11. The inner sides of the lower parts of the pair of first elastic arms 12 can be provided with first limiting tables 14 matched with lifting reset grooves 34 on two sides of the upper end of the pedicle screw 3 so as to better clamp and fix the pedicle screw 3.

The threaded pipe 11 can be provided with a first sliding groove 15 extending along the length direction of the threaded pipe 11, the lower part of the threaded pipe 11 is provided with a pair of first stop sleeve limiting grooves 16 which are vertically communicated with the first sliding groove 15 and are arranged at intervals, the upper end of the first sliding stop sleeve 13 is convexly provided with a first stop table (specifically, a pin with a spring) 17 which is slidably connected in the first sliding groove 15 and matched with the first stop sleeve limiting grooves 16, when the first stop table 17 is positioned in the first stop sleeve limiting groove 16 which is positioned above, the pedicle screw 3 is loosened by the pair of first elastic arms 12, and when the first stop table 17 is positioned in the first stop sleeve limiting groove 16 (the limiting groove is positioned at the left side of the first stop table 17 in the figure and is blocked and not shown), the pedicle screw 3 is clamped by the pair of first elastic arms 12, so that the first sliding stop sleeve 13 is conveniently limited. In a state that the pair of first elastic arms 12 loosen/clamp the pedicle screw 3, the pair of first retaining sleeve limit grooves 16 and the first retaining table 17 cooperate, so that the first sliding retaining sleeve 13 can be prevented from moving axially, and the pedicle screw 3 can be loosened/clamped well. The pair of first stop collar limiting slots 16 and the first runner 15 therebetween preferably together form a Z-like structure for ease of operation.

When in use, before the pair of first elastic arms 12 of the lifting screw holder 1 are sleeved on the nail seat 31 of the pedicle screw 3, the first sliding retaining sleeve 13 is lifted upwards along the first sliding groove 15 and screwed into the first retaining sleeve limiting groove 16 positioned at the upper position (left), then the pair of first elastic arms 12 are sleeved on the nail seat 31 of the pedicle screw 3 under the condition of elastic expansion, so that the first limiting table 14 is clamped into the lifting reset groove 34 of the nail seat 31, the first sliding retaining sleeve 13 is pushed downwards along the first sliding groove 15 and screwed into the first retaining sleeve limiting groove 16 positioned at the lower position (right), and the pair of first elastic arms 12 elastically shrink to clamp the pedicle screw 3.

The lifting cross-connection 4 can move along the axial direction of the lifting screw holder 1, and the lifting cross-connection 4 is sleeved with the lifting screw holder 1, so that the lifting screw holder is convenient to operate and preferably adopts the following structural form:

as shown in fig. 7, the lifting cross-link 4 may include a first cross-link main sleeve 41 for sliding sleeved on the threaded tube 11, wherein a driving nut 42 which is in threaded engagement with the threaded tube 11 is axially positioned at an upper end of the first cross-link main sleeve 41 and rotatably assembled in a circumferential direction, a first fixing rod 43 is provided on an outer sidewall of the first cross-link main sleeve 41, and the connector 7 is used for connecting an end of the first fixing rod 43 to the supporting rod 6, so that strength and accuracy are more controllable during operation of the threaded assembly during operation of the lifting cross-link 4 in the axial direction of the lifting screw holder 1, so as to perform a resetting operation better.

Here, the drive nut 42 is axially positioned and circumferentially rotatably mounted on the first transverse main sleeve 41, and may take the following structural form:

the outer surface of the upper end of the first transverse connection main sleeve 41 and the outer surface of the lower end of the driving nut 42 can be provided with a connecting clamping groove 44, and a clamping ring 45 with a C-shaped section is arranged in the connecting clamping groove 44 of the first transverse connection main sleeve 41 and the connecting clamping groove 44 of the driving nut 42 so as to axially position the driving nut 42 and circumferentially and rotatably assemble the driving nut 42 on the first transverse connection main sleeve 41.

The internal thread of the driving nut 42 and the external thread of the threaded tube 11 can be left-handed threads matched with each other, so that the operation habit of a doctor in operation is facilitated, and the doctor can rotate the driving nut 42 clockwise normally during operation, so that the lifting screw holder 1 moves downwards (presses down the convex part of the spine), and the severely deformed vertebral body connected and fixed by the lifting screw holder 1 moves towards the normal physiological curvature direction of the spine until the normal physiological curvature is restored, and then the driving nut 42 stops rotating. The drive nut 42 may be regular polygon or quincuncial.

The driving sleeve 8 is used for being sleeved on the lifting screw holder 1 to drive the lifting screw holder 1 to move relative to the lifting cross-link 4, and the following structural form is preferably adopted:

As shown in fig. 8, the driving sleeve 8 may include a sleeve main body 81 slidably fitted over the threaded pipe 11, and a nut engaging groove 82 that engages with the driving nut 42 of the lifting cross 4 is provided inside the front end of the sleeve main body 81, and the driving sleeve 8 is capable of driving the nut 42 to rotate relative to the threaded pipe 11. In the embodiment shown in the drawings, the sleeve body 81 is provided with a screw hole 83 inside. In use, the screw hole 83 of the driving sleeve 8 is sleeved on the threaded pipe 11 of the lifting screw holder 1 until the nut clamping groove 82 is sleeved on the driving nut 42. The rear end of the sleeve body portion 81 may be provided with a drive handle 84 to facilitate hand-held operation. The sleeve body portion 81 may be provided with indication slots 85 extending along its length to facilitate viewing of the distance/position of movement of the threaded tube 11. The nut clamping groove 82 may be a regular polygon or a quincuncial shape, whichever shape is consistent with and mates with the drive nut 42.

In the invention, the driving sleeve 8 is sleeved on the lifting screw holder 1 to drive the lifting screw holder 1 to move relative to the lifting cross-link 4, in order to achieve the function, the lifting screw holder 1, the lifting cross-link 4 and the driving sleeve 8 can adopt various other modes which are easy to think by a person skilled in the art besides adopting the matching mode, for example, the lifting cross-link 4 and the lifting screw holder 1 are in a simple sleeved connection (no threaded matching), the driving sleeve 8 can clamp and fix the lifting cross-link 4 on one hand and is provided with a push rod on the other hand, and the lifting screw holder 1 can be pushed to move.

The fixed screw holder 2 can take various forms as will be readily apparent to those skilled in the art, such as a conventional pedicle screw holder sleeve, however, for ease of implementation, the present invention preferably takes the following form:

as shown in fig. 9, the fixed screw holder 2 may include a light pipe 21, a pair of second elastic arms 22 are provided at a lower end of the light pipe 21, and a second sliding blocking sleeve 23 for driving the pair of second elastic arms 22 to clamp the pedicle screw 3 is sleeved at a lower portion of the light pipe 21. The lower inner sides of the pair of second elastic arms 22 may be provided with second stopper 24 which are matched with the lifting reset grooves 34 at both sides of the upper end of the pedicle screw 3 to better clamp and fix the pedicle screw 3.

The light pipe 21 can be provided with a second chute 25 extending along the length direction of the light pipe 21, the lower part of the light pipe 21 is provided with a pair of second stop sleeve limiting grooves 26 which are vertically communicated with the second chute 25 and are arranged at intervals, the upper end of the second sliding stop sleeve 23 is convexly provided with a second stop table (specifically, a pin with a spring) 27 which is slidably connected in the second chute 25 and matched with the second stop sleeve limiting grooves 26, when the second stop table 27 is positioned in the second stop sleeve limiting groove 26 which is positioned above, the pedicle screw 3 is loosened by the pair of second elastic arms 22, and when the second stop table 27 is positioned in the second stop sleeve limiting groove 26 which is positioned below, the pedicle screw 3 is clamped by the pair of second elastic arms 22, so that the second sliding stop sleeve 23 is conveniently limited. In a state that the pair of second elastic arms 22 loosen/clamp the pedicle screw 3, the pair of second retaining sleeve limit grooves 26 and the second retaining table 27 cooperate, so that the second sliding retaining sleeve 23 can be prevented from moving axially, and the pedicle screw 3 can be loosened/clamped well. The pair of second stop collar limiting grooves 26 and the second sliding groove 25 therebetween preferably form a similar Z-shaped structure together for convenient operation.

When in use, before the pair of second elastic arms 22 of the fixed screw holder 2 are sleeved on the nail seat 31 of the pedicle screw 3, the second sliding retaining sleeve 23 is lifted upwards along the second sliding groove 25 and screwed into the second retaining sleeve limiting groove 26 positioned at the upper position (left), then the pair of second elastic arms 22 are sleeved on the nail seat 31 of the pedicle screw 3 under the condition of elastic expansion, so that the second limiting table 24 is clamped into the lifting reset groove 34 of the nail seat 31, the second sliding retaining sleeve 23 is pushed downwards along the second sliding groove 25 and screwed into the second retaining sleeve limiting groove 26 positioned at the lower position (right), and the pair of second elastic arms 22 elastically shrink to clamp the pedicle screw 3.

The fixed crosstie 5 is used for being fixed on the fixed screw holder 2, and preferably adopts the following structural form:

as shown in fig. 10, the fixed cross-coupling 5 may include a second cross-coupling main sleeve 51 for being sleeved on the light pipe 21, a locking screw 52 for pressing and fixing the light pipe 21 is penetrated through a sidewall of the second cross-coupling main sleeve 51, a second fixing rod 53 is further provided on an outer sidewall of the second cross-coupling main sleeve 51, and a connector 7 is used for connecting an end of the second fixing rod 53 to the support rod 6. In the embodiment shown in the figures, the second cross-linking main sleeve 51 is provided with a light beam hole 54. In use, the second transverse main sleeve 51 is sleeved on the light pipe 21 along the light column hole 54, and then the light pipe 21 is extruded and fixed by the locking screw 52.

As shown in fig. 11, the apparatus for correcting serious deformity of the spinal column according to the present invention may further comprise an extension sleeve 9 for being sleeved on the light pipe 21, wherein the inner hole of the extension sleeve 9 comprises a large diameter section 91 positioned at the lower part and a small diameter section 92 positioned at the upper part, the inner diameter of the large diameter section 91 is greater than or equal to the outer diameter of the light pipe 21, and the inner diameter of the small diameter section 92 is smaller than the outer diameter of the light pipe 21, so that a limit table 93 for being matched with the upper end of the light pipe 21 is formed at the joint of the large diameter section 91 and the small diameter section 92, thereby facilitating the extension of the light pipe 21 and the operation in surgery. After the connector 7 connects the lifting cross-link 4 and the fixed cross-link 5 to the horizontally arranged support rod 6, the large diameter section 91 of the extension sleeve 9 can be sleeved on the light pipe 21 of the fixed screw holder 2, and when the light pipe 21 is propped against the limiting table 93, the hole shaft completes the maximum contact.

The connector 7 is used to connect the ends of the lifting cross-link 4 and the fixed cross-link 5 to the support bar 6, respectively, and it can take various forms that are easily conceivable to those skilled in the art, for example, a spring clip or even a locking pin, a strap, etc., however, for convenience of implementation, the following forms are preferably adopted:

as shown in fig. 12, the connector 7 may include, in order from top to bottom, an upper female buckle 71, a male buckle, and a lower female buckle 72, the sides of the upper female buckle 71 and the male buckle are respectively provided with an upper female buckle holding bar arc 711 and an upper male buckle holding bar arc 731 that are mutually matched, thereby forming an upper holding bar slot, the sides of the lower female buckle 72 and the male buckle are respectively provided with a lower female buckle holding bar arc 721 and a lower male buckle holding bar arc 741 that are mutually matched, thereby forming a lower holding bar slot, and the connector 7 further includes a locking member for axially locking and fixing the upper female buckle 71, the male buckle, and the lower female buckle 72, so as to connect the first fixing rod 43 of the lifting cross 4 and the second fixing rod 53 of the fixing cross 5 with the support bar 6, respectively.

Further, the male buckle may include an upper male buckle 73 and a lower male buckle 74, an upper male buckle holding rod arc 731 is provided on the upper male buckle 73, a lower male buckle holding rod arc 741 is provided on the lower male buckle 74, engagement teeth 75 are provided on opposite end surfaces of the upper male buckle 73 and the lower male buckle 74, the engagement teeth 75 are characteristic of the male buckle, and the engagement teeth 75 between the upper male buckle 73 and the lower male buckle 74 are engaged with each other when the connector 7 is axially locked, thereby relatively fixing the two male buckles to remove rotational degrees of freedom and the like, so as to initially fix the relative positions of the two male buckles. At least two positioning teeth 76 can be arranged in the upper male buckle holding rod circular arc 731 and the lower male buckle holding rod circular arc 741, and the biting force can be increased when the fixing rod/supporting rod 6 is locked, so that the locking is tighter and firmer. The mating end surfaces of the upper female button 71 and the male button, and the mating end surfaces of the lower female button 72 and the male button may be L-shaped, which not only form mutual positioning, but also prevent damage caused by excessive force between the male button and the female button. The axis of the upper rod holding groove and the axis of the lower rod holding groove can be intersected, for example, the angle range is 60-120 degrees, so that the surgical operation is convenient.

The locking piece preferably adopts the following structural form:

the locking member may include a locking bolt 77 passing through the upper female button 71, the male button and the lower female button 72 in sequence and threadedly coupled to the lower female button 72. The upper end of the locking bolt 77 may be provided with a bolt driving groove 771 to facilitate driving of the locking bolt 77. The bolt driving groove 771 may be in the form of a regular polygon or a quincunx. The lower end of the locking bolt 77 can be provided with a bolt bottom nail 78, the lower end of the lower female buckle 72 is provided with a bolt bottom nail clearance hole 722 for accommodating the bolt bottom nail 78, the bolt bottom nail 78 is a limit screw of the locking bolt 77, and the locking bolt 77 is ensured not to deviate from the male buckle and the female buckle in the process of locking the connector 7; the arrangement of the bolt bottom nail clearance holes 722 can enable the bolt bottom nails 78 to move in the bolt bottom nail clearance holes 722 in the process of locking/unlocking the connector 7 by driving the locking bolts 77, so that the structure function is met, and the bolt bottom nails 78 can be hidden to reduce the volume of the connector 7. The lower end of the screw bottom nail 78 may be provided with screw driving holes 781 to facilitate driving of the screw bottom nail 78. The bolt driving hole 781 may be in the form of two holes or multiple holes, mainly to distinguish conventional tools, and prevent the error operation from being withdrawn after assembly.

The rod portion of the locking bolt 77 may be sleeved with a driving ring 79 above the upper female buckle 71, the upper end of the upper female buckle 71 is provided with a driving ring groove 712, the lower surface of the driving ring 79 and the inner surface of the driving ring groove 712 are mutually matched spherical surfaces or inclined surfaces, so that when the locking bolt 77 is driven to lock the connector 7, the two spherical surfaces/inclined surfaces are matched with each other through the driving ring 79 and the driving ring groove 712 to realize locking, the contact area is larger, and the stress is more uniform.

When in use, the first fixing rod 41 of the lifting cross-link 4 and the second fixing rod 51 of the fixing cross-link 5 are respectively placed in the upper rod holding grooves of the two connectors 7, then the supporting rod 6 is placed in the lower rod holding grooves of the two connectors 7, and finally the locking bolt 77 is driven to lock the connectors 7 so as to assemble the lifting cross-link 4, the fixing cross-link 5 and the supporting rod 6 into an integral structure; before the connector 7 is locked, the lifting cross-link 4 is screwed to a proper position of the screwed pipe 11, and the fixed cross-link 5 is sleeved on the light pipe 21, so that the fixed cross-link 5 and the lifting cross-link 4 are on the same horizontal plane.

As shown in fig. 13, the spinal serious deformity correction device of the present invention may further include an unlocking device 10 for unlocking the lifting screw holder 1 or the fixed screw holder 2, the unlocking device 10 being capable of driving the first sliding sleeve 13 or the second sliding sleeve 23 to rotate so as to separate the first elastic arm 12 or the second elastic arm 22 from the pedicle screw 3.

The unlocking device 10 preferably adopts the following structural form:

the unlocking device 10 may include a driving cap 101, a connecting arm 102 and a sliding blocking arm 103 sequentially connected from top to bottom, a through hole 104 (only a light hole) for the threaded tube 11 or the light tube 21 to pass through is provided in the driving cap 101, and a lifting slot 105 for matching with the first limiting blocking table 17 or the second limiting blocking table 27 is provided on the sliding blocking arm 103, so as to facilitate unlocking the lifting screw holder 1 or the fixed screw holder 2. The lower end of the sliding baffle arm 103 can be provided with a baffle table inlet 106 communicated with the middle part of the lifting groove 105, so that a lifting arm 107 is respectively formed on the left side and the right side below the lifting groove 105, the baffle table inlet 106 can facilitate the first limiting baffle table 17 or the second limiting baffle table 27 to enter the lifting groove 105, and the lifting arm 107 can facilitate the lifting operation; the connecting arm 102 may comprise a straight arm section and an inwardly inclined arm section from top to bottom in order, because the driving cap 101, the connecting arm 102 and the sliding stop arm 103 are all revolved bodies, this design prevents interference during operation.

After the backbone reset operation is completed, the driving sleeve 8 and the extension sleeve 9 are taken down, the driving cap 101 is sleeved on the threaded pipe 11 or the light pipe 21, the first limiting baffle 17 or the second limiting baffle 27 enters the pulling groove 105 along the baffle inlet 106, the driving cap 101 is reversely rotated, the limiting baffle slides out of the lower baffle sleeve limiting groove and slides into the upper baffle sleeve limiting groove along the sliding groove, and the lifting screw holder 1 and the fixed screw holder 2 sleeved on the screw seat 31 of the pedicle screw 3 can be taken down, so that the operation is completed.

In another aspect, the present invention provides a spinal serious deformity correction system comprising pedicle screws 3 and a spinal serious deformity correction device as described above. Since the structure of the spinal serious deformity correction device is the same as above, the description thereof will not be repeated here.

The spine severe deformity correction system comprises a lifting screw holder for connecting and fixing pedicle screws of a spine severe deformity section and a fixed screw holder for connecting and fixing pedicle screws of a spine curvature normal section, wherein lifting cross links and fixed cross links are respectively arranged on the lifting screw holder and the fixed screw holder, and the spine severe deformity correction apparatus further comprises a connector for respectively connecting the lifting cross links and the fixed cross links to a horizontally arranged supporting rod.

As shown in fig. 14 to 15, the pedicle screw 3 may be a unidirectional nail or a universal nail, the nail rod 35 of the unidirectional nail and the nail seat 31 are of an integral structure, the nail rod 35 of the universal nail can swing around the nail seat 31 in any direction, and the nail rod 35 can be fixed after the screw plug is locked to fix the connecting rod, and the unidirectional nail or the universal nail can be divided into a short tail nail and a long tail nail.

Further, the front section of the pin 35 may be a few-thread (e.g. single-thread) thread 36, and after being driven into the vertebral body, the pin may be used as a tap to prepare for driving multi-thread (e.g. double-thread, triple-thread, four-thread, etc.) threads 37 of the rear section of the pin 35, and the multi-thread threads 37 may increase the contact area with bone in the cortical bone layer of the vertebral body, thereby increasing the anti-extraction force of the pedicle screw 3 in the vertebral body. The lower end of the seat 31 may be provided with a seat outer circle 38 to prevent the pedicle screw 3 from driving the rod 35 too far into the vertebral body.

While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.

Claims

1. A spinal serious deformity correction device comprising a lifting screw holder and a fixed screw holder, wherein:

2. The spinal serious deformity correction device according to claim 1, wherein said lifting screw holder comprises a threaded tube, a pair of first elastic arms are provided at a lower end of said threaded tube, and a first sliding sleeve for driving said pair of first elastic arms to clamp a pedicle screw is provided at a lower portion of said threaded tube.

3. The spinal serious deformity correction device according to claim 2, wherein the inner sides of the lower parts of the pair of first elastic arms are provided with first limiting tables matched with lifting reset grooves on two sides of the upper end of the pedicle screw;

4. The spinal column weight deformity correction device according to claim 2, wherein said lifting cross-link comprises a first cross-link main sleeve for sliding sleeve over said threaded tube, an upper end of said first cross-link main sleeve being axially positioned and circumferentially rotatably fitted with a drive nut threadedly engaged with said threaded tube, an outer sidewall of said first cross-link main sleeve being provided with a first securing rod, said connector for connecting an end of said first securing rod to said support rod.

5. The spinal serious deformity correction device according to claim 4, wherein the upper end outer surface of the first transverse main sleeve and the lower end outer surface of the driving nut are respectively provided with a connecting clamping groove, and a clamping ring with a C-shaped cross section is arranged in the connecting clamping groove of the first transverse main sleeve and the connecting clamping groove of the driving nut so as to axially position and circumferentially rotatably assemble the driving nut on the first transverse main sleeve;

and/or the driving nut is in a regular polygon shape or a plum blossom shape.

6. The spinal serious deformity correction device according to claim 2, further comprising a drive sleeve that is positioned over said elevator screw holder to drive said elevator screw holder in a transverse movement relative to said elevator.

7. The spinal column severe deformity correction device according to claim 6, wherein the driving sleeve comprises a sleeve main body part which is arranged on the threaded tube in a sliding sleeve mode, a nut clamping groove matched with a driving nut of the lifting cross-connection is formed in the inner side of the front end of the sleeve main body part, and the driving sleeve can drive the driving nut to rotate relative to the threaded tube.

8. The spinal serious deformity correction device according to claim 7, wherein a rear end of said sleeve body part is provided with a driving handle;

9. The spinal serious deformity correction device according to claim 1, wherein said fixed screw holder comprises a light pipe, a pair of second elastic arms are provided at the lower end of said light pipe, and a second sliding sleeve for driving said pair of second elastic arms to clamp pedicle screws is provided at the lower part of said light pipe.

10. The spinal serious deformity correction device according to claim 9, wherein the inner sides of the lower parts of the pair of second elastic arms are provided with second limiting tables matched with lifting reset grooves on two sides of the upper end of the pedicle screw;

11. The spinal column severe deformity correction device according to claim 1, wherein said connector comprises, in order from top to bottom, an upper box, a pin, and a lower box, wherein the sides of said upper box and pin are respectively provided with an upper box holding bar arc and an upper pin holding bar arc that are mutually matched, thereby forming an upper holding bar groove, the sides of said lower box and pin are respectively provided with a lower box holding bar arc and a lower pin holding bar arc that are mutually matched, thereby forming a lower holding bar groove, said connector further comprises a locking member for axially locking and fixing said upper box, pin, and lower box.

12. The spinal serious deformity correction device according to claim 11, wherein said male buckle comprises an upper male buckle and a lower male buckle, said upper male buckle being provided with said upper male buckle holding bar circular arc, said lower male buckle being provided with said lower male buckle holding bar circular arc, said upper male buckle and lower male buckle being provided with engagement teeth on opposite end surfaces thereof;

13. The spinal serious deformity correction apparatus according to claim 11, wherein said locking member comprises a locking bolt threaded through said upper, male and lower box in sequence and threadedly connected to said lower box, wherein:

14. The spinal serious deformity correction device according to claim 2 or 9, further comprising an unlocking device for unlocking said lifting screw holder or fixed screw holder, said unlocking device being capable of driving said first sliding sleeve or second sliding sleeve in rotation to disengage said first or second elastic arm from said pedicle screw.

15. The spinal serious deformity correction device according to claim 14, wherein said unlocking means comprises a driving cap, a connecting arm and a sliding blocking arm which are sequentially connected from top to bottom, wherein a through hole for said threaded tube or light tube to pass through is provided in said driving cap, and a pulling groove for being matched with said first limiting blocking table or said second limiting blocking table is provided on said sliding blocking arm, wherein:

16. A spinal serious deformity correction system comprising a pedicle screw and the spinal serious deformity correction device of any one of claims 1-15, wherein the pedicle screw is a unidirectional or universal screw.