CN106974714B - Minimally invasive spine internal fixation system - Google Patents

Minimally invasive spine internal fixation system Download PDF

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Publication number
CN106974714B
CN106974714B CN201710153277.1A CN201710153277A CN106974714B CN 106974714 B CN106974714 B CN 106974714B CN 201710153277 A CN201710153277 A CN 201710153277A CN 106974714 B CN106974714 B CN 106974714B
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China
Prior art keywords
sleeve
screw
minimally invasive
hole
pull rod
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Active
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CN201710153277.1A
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Chinese (zh)
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CN106974714A (en
Inventor
徐世隆
梁振耀
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Zhongshan Shiyitang Medical Equipment Co ltd
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Zhongshan Shiyitang Medical Equipment Co ltd
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Publication of CN106974714A publication Critical patent/CN106974714A/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7002—Longitudinal elements, e.g. rods
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/1662—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for particular parts of the body
    • A61B17/1671—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for particular parts of the body for the spine
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/683—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin comprising bone transfixation elements, e.g. bolt with a distal cooperating element such as a nut
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7074—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
    • A61B2017/00292—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means
    • A61B2017/0034—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means adapted to be inserted through a working channel of an endoscope
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B2017/564—Methods for bone or joint treatment

Abstract

The invention discloses a minimally invasive spine internal fixation system, which comprises: the minimally invasive channel establishing and expanding assembly is used for establishing a minimally invasive surgical channel on the back of a patient and expanding the minimally invasive surgical channel to a set size; a drilling assembly into the minimally invasive channel and for drilling a threaded hole in the vertebra setting location; the screw assembly comprises a screw and a connecting block, the upper part of the screw is rotatably connected with the connecting block, a first through hole is formed in the connecting block, threads are arranged on the inner side wall of the first through hole, and a second through hole is formed in the side wall of the connecting block; a screw assembly mounting mechanism for threading a screw into the threaded bore; the plurality of pull rods can be inserted into the second through holes of the plurality of connecting blocks at the same time; a pull rod penetrating assembly for penetrating the pull rod into the second through holes of the plurality of screw assemblies fixed on the vertebrae; and the fastening nails are arranged in the first through holes and used for pressing the pull rod. The invention can fix vertebrae with small wound.

Description

Minimally invasive spine internal fixation system
Technical Field
The invention relates to a minimally invasive intraspinal fixation system.
Background
When the intervertebral operation is carried out, the adjacent vertebrae are required to be fixed, the prior fixing method is to directly fix the screw and the blind rivet on a larger wound on a patient, the wound is too large, the postoperative rehabilitation of the patient is not facilitated, complications are easy to occur, and longer postoperative recovery time is required.
Disclosure of Invention
In order to solve the problems, the invention provides a minimally invasive intraspinal fixation system.
The technical scheme adopted for solving the technical problems is as follows:
a minimally invasive spinal internal fixation system, comprising:
the minimally invasive channel establishing and expanding assembly is used for establishing a minimally invasive surgical channel on the back of a patient and expanding the minimally invasive surgical channel to a set size;
a drilling assembly into the minimally invasive channel and for drilling a threaded hole in the vertebra setting location;
the screw assembly comprises a screw and a connecting block, the upper part of the screw is rotatably connected with the connecting block, a first through hole is formed in the connecting block, the control end of the screw is positioned at the bottom of the first through hole, threads are arranged on the inner side wall of the first through hole, an anti-rotation positioning device is arranged on the outer side wall of the connecting block, and a second through hole is formed in the side wall of the connecting block;
a screw assembly mounting mechanism for threading a screw in the screw assembly into the threaded bore;
the plurality of pull rods can be inserted into the second through holes of the plurality of connecting blocks at the same time, and the pull rods are arc-shaped;
the pull rod penetrating assembly drives the pull rod to move in a circular arc track and is used for penetrating the pull rod into the second through holes of the plurality of screw assemblies fixed on the vertebrae;
and the fastening nails are arranged in the first through holes and used for pressing the pull rod.
The minimally invasive channel creation and expansion assembly comprises:
the probe is inserted into the first sleeve, the upper part of the probe is detachably connected with the upper part of the first sleeve, and the lower part of the probe extends out of the lower part of the first sleeve;
the guide needle is inserted into the hole site after the probe is removed after the probe is inserted into the vertebrae;
a plurality of expansion casings, the outer diameters of the plurality of expansion casings gradually increasing.
The probe upper portion is provided with the lateral wall and is provided with the dop, first sleeve pipe upper portion lateral wall is provided with the screens, and the dop rotates into the screens along with the probe.
The drilling assembly comprises a plurality of tapping cones capable of tapping screw holes with different diameters, and a third through hole matched with the guide pin is formed in the central shaft of the tapping cone.
The anti-rotation positioning device comprises at least one first flat surface arranged on the side wall of the connecting block; the screw assembly mounting mechanism includes:
the inner side wall of the lower end of the second sleeve is provided with a second flat surface matched with the first flat surface, and the side wall of the lower end of the second sleeve is also provided with an avoidance gap for avoiding the second through hole;
the third sleeve is inserted into the second sleeve, the lower end of the third sleeve is provided with external threads matched with the threads on the connecting block, and the upper end of the third sleeve is provided with an annular protrusion with the outer diameter larger than the inner diameter of the second sleeve;
the first screwdriver is inserted in the third sleeve, and the working part of the first screwdriver is connected with the control end of the screw.
The upper end side wall of second sheathed tube still is provided with the third and levels the face, wear the pull rod subassembly and include:
a plurality of adapter blocks, each adapter block is provided with a connecting hole, the inner side wall of each connecting hole is provided with a fourth flat surface matched with the third flat surface, and each adapter block is also provided with a connecting notch;
the middle rotating plate can be fixedly connected with the connecting blocks at the connecting gaps;
and one end of the rotating rod is rotatably arranged on the middle rotating plate, the other end of the rotating rod is connected with the pull rod, and the pull rod rotates along with the rotating rod to enter the second through hole.
The screw is connected with the connecting block in a ball hinge mode.
The beneficial effects of the invention are as follows: the invention adopting the structure can finish the fixation of vertebrae under a smaller wound, accurately transmits the pull rod into the second through hole by means of the pull rod penetrating assembly, and then fixes the pull rod on the screw in the minimally invasive channel; the invention can complete fixation of adjacent vertebrae under the minimally invasive channel, is beneficial to postoperative rehabilitation of patients, reduces postoperative complications, shortens postoperative recovery time, reduces postoperative pain and reduces trauma to soft tissues.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a schematic view of a first sleeve and probe after assembly;
FIG. 2 is an exploded view of the first sleeve and probe;
FIG. 3 is a schematic view of a guide needle;
FIG. 4 is a schematic illustration of an expansion sheath;
FIG. 5 is a schematic view of a tap;
FIG. 6 is a schematic view of a screw assembly mounting mechanism;
FIG. 7 is an exploded schematic view of the screw assembly mounting mechanism;
FIG. 8 is a schematic view of a screw assembly;
FIG. 9 is a schematic view of a calibration plate;
fig. 10 is a schematic view of a pull rod assembly.
Detailed Description
Referring to fig. 1-10, the present invention is a minimally invasive spinal internal fixation system comprising:
the minimally invasive channel establishing and expanding assembly is used for establishing a minimally invasive surgical channel on the back of a patient and expanding the minimally invasive surgical channel to a set size;
a drilling assembly 1, which enters the minimally invasive channel and is used for drilling a threaded hole at a vertebra setting position;
the screw assembly comprises a screw 2 and a connecting block 3, the upper part of the screw 2 is rotatably connected with the connecting block 3, a first through hole 4 is formed in the connecting block 3, a control end 5 of the screw 2 is positioned at the bottom of the first through hole 4, threads 6 are arranged on the inner side wall of the first through hole 4, an anti-rotation positioning device is arranged on the outer side wall of the connecting block 3, a second through hole 7 is formed in the side wall of the connecting block 3, and the screw 2 and the connecting block 3 are connected together in a ball-hinge mode;
a screw assembly mounting mechanism 8 for screwing the screw 2 in the screw assembly into the threaded hole;
a plurality of pull rods 9, each pull rod 9 can be inserted into the second through holes 7 of the plurality of connecting blocks 3 at the same time, and the pull rods 9 are arc-shaped;
the pull rod assembly 10 is used for driving the pull rod 9 to move in an arc track, and the pull rod 9 is arranged in the second through holes 7 of the screw assemblies fixed on the vertebrae in a penetrating way;
a plurality of fastening nails are arranged in the first through holes 4 and used for pressing the pull rod 9.
The invention adopting the structure can finish the fixation of vertebrae under a small wound, accurately transmits the pull rod 9 into the second through hole 7 by means of the pull rod penetrating assembly 10 assembly, and then fixes the pull rod 9 on the screw 2 in the minimally invasive channel; the invention can complete fixation of adjacent vertebrae under the minimally invasive channel, is beneficial to postoperative rehabilitation of patients, reduces postoperative complications, shortens postoperative recovery time, reduces postoperative pain and reduces trauma to soft tissues. The specific action process of the invention is as follows: the minimally invasive channel is established on the back of a patient through the minimally invasive channel resume and the expansion assembly, then a threaded hole is drilled on the vertebra through the drilling assembly 1, the screw assembly is installed in the threaded hole through the screw assembly installation mechanism 8, the pull rod 9 moves in an arc track through the pull rod penetrating assembly 10, the pull rod 9 penetrates through the skin and flesh of the back of the patient to enter the second through hole 7, the pull rod 9 is fastened through the clamp nail deposit, and the fixing of the adjacent vertebra can be completed by the relative movement of the pull rod 9 and the screw 2.
As shown, the minimally invasive approach creation and expansion assembly includes:
the probe 12 is inserted into the first sleeve 11, the upper part of the probe 12 is detachably connected with the upper part of the first sleeve 11, and the lower part of the probe 12 extends out of the lower part of the first sleeve 11;
a guide needle 13, after the probe 12 is inserted into the vertebrae, the probe 12 is removed, and the guide needle 13 is inserted into the hole site from which the probe 12 was removed;
a number of expansion casings 14, the number of expansion casings 14 having an outer diameter that gradually increases.
The minimally invasive channel establishment and expansion process of the structure is as follows, firstly, the assembled first sleeve 11 and the probe penetrate through skin and flesh, the probe 12 is inserted into vertebrae, then the probe is removed, the guide needle 13 is inserted into a hole site after the probe 12 is removed, then the first sleeve 11 is removed, the expansion sleeve 14 sequentially expands the window by taking the guide needle 13 as the center according to the outer diameter from small to large, the expansion sleeve 14 with the largest outer diameter is reserved, and the expansion sleeve 14 are removed, so that establishment and expansion of the minimally invasive channel are completed. The invention also comprises a calibration plate 15, wherein the calibration plate 15 is provided with a slot 16, the first sleeve 11 passes through the slot 16 and then establishes the minimally invasive channel, and the slot 16 limits the adjacent first sleeve 11 (so that the screws 2 are distributed in a straight line) to facilitate the subsequent pull rod 9 to enter.
The cooperation between probe 12 and the first sleeve pipe 11 can adopt following structure, probe 12 upper portion is provided with the lateral wall and is provided with chuck 17, first sleeve pipe 11 upper portion lateral wall is provided with screens 18, and chuck 17 rotates and gets into screens 18 along with probe 12, and after the screens 17 rotated and gets into screens 18 along with probe 12, probe 12 and first sleeve pipe 11 can stretch into the establishment of carrying out the wicresoft passageway on the patient's skin and flesh as a whole, and the connection structure of screens 18 and chuck 17 is ingenious, does benefit to quick assembly disassembly, and joint strength is high.
As shown in the drawing, the drilling assembly 1 includes a plurality of tapping cones 19 for tapping screw holes with different diameters, and a third through hole 20 for matching with the guide pin 13 is provided at the central axis of the tapping cones 19. When the tap 19 works, the third through hole 20 is sleeved on the guide needle 13 for guiding, the tap 19 is used for tapping the threaded hole from small to large until the tap hole reaches the set size, and the guide needle 13 and the tap 19 are taken out.
As shown, the anti-rotation positioning device comprises at least one first flat surface 21 arranged on the side wall of the connecting block 3; the screw assembly mounting mechanism 8 includes:
the inner side wall of the lower end of the second sleeve 22 is provided with a second flat surface 23 matched with the first flat surface 21, and the inner side wall of the lower end of the second sleeve 22 is also provided with an avoidance gap 24 for avoiding the second through hole 7;
a third sleeve 25 inserted in the second sleeve 22, the lower end of which is provided with external threads 26 matching with the threads 6 on the connecting block 3, and the upper end of which is provided with an annular protrusion 27 with an outer diameter larger than the inner diameter of the second sleeve 22;
the first screw driver 28 is inserted in the third sleeve 25, and the working part of the first screw driver 28 is connected with the control end 5 of the screw 2. The anti-rotation positioning device adopting the structure is specifically assembled by butting the lower end of the second sleeve 22 with the connecting block 3, inserting the third sleeve 25 into the second sleeve 22, screwing the external thread 26 of the third sleeve 25 into the first through hole 4, fixing the connecting block 3, the second sleeve 22 and the third sleeve 25 together, inserting the first screwdriver 28 into the third sleeve 25 and connecting the first screwdriver 28 with the control end 5 of the screw 2, putting the whole screw assembly mounting mechanism 8 into the expansion sleeve 14 after assembly, driving the screw 2 to be screwed into the threaded hole through the first screwdriver 28, and taking out the first screwdriver 28 and the third sleeve 25 to keep the second sleeve 22.
As shown in the drawing, the upper end side wall of the second sleeve 22 is further provided with a third flat surface 29, and the pull rod assembly 10 includes:
a plurality of adapter blocks 30, each adapter block 30 is provided with a connecting hole, the inner side wall of the connecting hole is provided with a fourth flat surface 31 matched with the third flat surface 29, and the adapter blocks 30 are also provided with connecting notches;
the middle rotating plate 32 can be fixedly connected with the plurality of connecting blocks 3 at the connecting gaps;
a rotating rod 33, one end of which is rotatably installed on the intermediate rotating plate 32, and the other end of which is connected with the pull rod 9, and the pull rod 9 rotates along with the rotating rod 33 into the second through hole 7.
Through connecting the adapter block 30 at the upper end of second sleeve pipe 22, fix a plurality of adapter blocks 30 on well swivel plate 32 again, install swivelling lever 33 rotatably on well swivel plate 32 again, drive pull rod 9 through swivelling lever 33 and do the removal of orbit for the circular arc, pass patient's back skin and meat with pull rod 9 and get into second through-hole 7, pass through the second screwdriver and follow the wicresoft passageway with fastening nail screw in first through-hole 4, compress tightly pull rod 9, reach fixed effect.
The above examples are only preferred embodiments of the invention, and other embodiments of the invention are possible. Equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the invention, and these equivalent modifications or substitutions are intended to be included within the scope of the present claims.

Claims (4)

1. A minimally invasive spinal internal fixation system, comprising:
the minimally invasive channel establishing and expanding assembly is used for establishing a minimally invasive surgical channel on the back of a patient and expanding the minimally invasive surgical channel to a set size; the minimally invasive channel creation and expansion assembly comprises: the probe is inserted into the first sleeve, the upper part of the probe is detachably connected with the upper part of the first sleeve, and the lower part of the probe extends out of the lower part of the first sleeve; the guide needle is inserted into the hole site after the probe is removed after the probe is inserted into the vertebrae; a plurality of expansion casings, the outer diameters of the expansion casings being gradually increased;
a drilling assembly into the minimally invasive channel and for drilling a threaded hole in the vertebra setting location;
the screw assembly comprises a screw and a connecting block, the upper part of the screw is rotatably connected with the connecting block, a first through hole is formed in the connecting block, the control end of the screw is positioned at the bottom of the first through hole, threads are arranged on the inner side wall of the first through hole, an anti-rotation positioning device is arranged on the outer side wall of the connecting block, and a second through hole is formed in the side wall of the connecting block;
a screw assembly mounting mechanism for threading a screw in the screw assembly into the threaded bore;
the plurality of pull rods can be inserted into the second through holes of the plurality of connecting blocks at the same time, and the pull rods are arc-shaped;
the pull rod penetrating assembly drives the pull rod to move in an arc track and is used for penetrating the pull rod into the second through holes of the plurality of screw assemblies fixed on the vertebrae; the fastening nails are arranged in the first through holes and used for pressing the pull rods;
the device comprises a calibration plate, a first sleeve and a second sleeve, wherein a slot is arranged on the calibration plate, the first sleeve passes through the slot and then establishes a minimally invasive channel, and adjacent first sleeves are limited through the slot;
the anti-rotation positioning device comprises at least one first flat surface arranged on the side wall of the connecting block; the screw assembly mounting mechanism includes:
the inner side wall of the lower end of the second sleeve is provided with a second flat surface matched with the first flat surface, and the side wall of the lower end of the second sleeve is also provided with an avoidance gap for avoiding the second through hole;
the third sleeve is inserted into the second sleeve, the lower end of the third sleeve is provided with external threads matched with the threads on the connecting block, and the upper end of the third sleeve is provided with an annular protrusion with the outer diameter larger than the inner diameter of the second sleeve;
the first screwdriver is inserted into the third sleeve, and the working part of the first screwdriver is connected with the control end of the screw;
the upper end side wall of second sheathed tube still is provided with the third and levels the face, wear the pull rod subassembly and include:
a plurality of adapter blocks, each adapter block is provided with a connecting hole, the inner side wall of each connecting hole is provided with a fourth flat surface matched with the third flat surface, and each adapter block is also provided with a connecting notch;
the middle rotating plate can be fixedly connected with the connecting blocks at the connecting gaps;
and one end of the rotating rod is rotatably arranged on the middle rotating plate, the other end of the rotating rod is connected with the pull rod, and the pull rod rotates along with the rotating rod to enter the second through hole.
2. A minimally invasive spinal column internal fixation system as claimed in claim 1, wherein the upper portion of the probe is provided with a sidewall provided with a chuck, the upper portion of the first sleeve is provided with a detent, the chuck follows the probe to rotate into the detent.
3. The minimally invasive spinal column internal fixation system of claim 1, wherein the drilling assembly includes a plurality of tap cones for tapping screw holes of different diameters, a third through hole being provided at a central axis of the tap cones for engaging the guide pin.
4. A minimally invasive spinal internal fixation system as recited in claim 1, wherein the screw is ball-and-socket coupled to the connection block.
CN201710153277.1A 2017-03-15 2017-03-15 Minimally invasive spine internal fixation system Active CN106974714B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710153277.1A CN106974714B (en) 2017-03-15 2017-03-15 Minimally invasive spine internal fixation system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710153277.1A CN106974714B (en) 2017-03-15 2017-03-15 Minimally invasive spine internal fixation system

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CN106974714B true CN106974714B (en) 2023-05-09

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Publication number Priority date Publication date Assignee Title
CN113440241B (en) * 2021-06-22 2023-07-25 浙江德康医疗器械有限公司 Screw implantation auxiliary sleeve for minimally invasive spine surgery

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CN2875349Y (en) * 2006-03-21 2007-03-07 莫里斯 Micro-traumatic sliding screw
US20110282348A1 (en) * 2010-05-11 2011-11-17 Gs Medical Co., Ltd. Device for fixation of bone, and device set comprising the same
US8206395B2 (en) * 2010-06-18 2012-06-26 Spine Wave, Inc. Surgical instrument and method for the distraction or compression of bones
KR101067664B1 (en) * 2011-06-22 2011-09-27 메디소스플러스(주) Minimally invasive instrument for spinal fixation
CN207125779U (en) * 2017-03-15 2018-03-23 中山市世医堂医疗器械有限公司 A kind of minimally invasive spine internal fixation system

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