CN112220510A - Minimally invasive vertebral body dilator - Google Patents
Minimally invasive vertebral body dilator Download PDFInfo
- Publication number
- CN112220510A CN112220510A CN202011166004.9A CN202011166004A CN112220510A CN 112220510 A CN112220510 A CN 112220510A CN 202011166004 A CN202011166004 A CN 202011166004A CN 112220510 A CN112220510 A CN 112220510A
- Authority
- CN
- China
- Prior art keywords
- block
- minimally invasive
- vertebral body
- fixed block
- pushing block
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/02—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
- A61B17/025—Joint distractors
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/02—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
- A61B17/0218—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors 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
- A61B17/02—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
- A61B17/025—Joint distractors
- A61B2017/0256—Joint distractors for the spine
Abstract
The invention discloses a minimally invasive vertebral body distracter which comprises a distraction device and a forming instrument for controlling the distraction of the distraction device; the opening device comprises a fixed block, an opening block and a pushing block; the fixed block with impel the piece opposite face and be provided with the stopper, through the stopper, prop open the piece be in the fixed block with it slides spacingly to realize establishing ties in the middle of the piece of impeling, impel the piece along being close to when the direction of fixed block slides, prop open the piece upwards and/or prop open downwards. The minimally invasive vertebral body spreader provided by the invention can meet the requirements of a minimally invasive surgery working channel through a surgery working channel with the diameter of less than 7mm, and meanwhile, the structure is more stable and the surgery is safer due to the fact that the middle block and the adjacent blocks are in surface contact.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to a minimally invasive vertebral body distractor.
Background
The spinal fusion operation has better curative effect on treating neck and waist pain and neck and waist instability, and is a conventional operation formula for treating degenerative disc disease, spinal spondylolisthesis and spinal segmental instability. To achieve an acceptable spinal fusion procedure, spinal fusion procedures often require a vertebral body distractor to pre-distract or reposition the intervertebral space.
With the development of medical science, spine surgery performed under minimally invasive channels is rapidly developed at present, but the development of corresponding surgical operation instruments is obviously delayed, so that certain minimally invasive surgeries are time-consuming and long or inconvenient to operate. Most of the existing conventional vertebral body distraction instruments are suitable for open surgery, cannot pass through a minimally invasive working channel, and even can enter an intervertebral space through the minimally invasive channel, the stability and the reliability are poor.
Therefore, the vertebral body spreader which can pass through a minimally invasive working channel and has good stability and reliability is an important research direction.
Disclosure of Invention
In order to overcome the defects, the invention provides a minimally invasive vertebral body spreader which can be accessed through a minimally invasive channel.
The invention adopts the following technical scheme:
a minimally invasive vertebral body spreader comprises a spreading device and a forming instrument for controlling the spreading of the spreading device; the opening device comprises a fixed block, an opening block and a pushing block; the fixed block with impel the piece opposite face and be provided with the stopper, through the stopper, prop open the piece be in the fixed block with it slides spacingly to realize establishing ties in the middle of the piece of impeling, impel the piece along being close to when the direction of fixed block slides, prop open the piece upwards and/or prop open downwards.
Preferably, a plurality of intermediate blocks are arranged between the fixed block and the opening block, the same number of intermediate blocks are arranged between the pushing block and the opening block, the limiting block is arranged at one end of the intermediate block close to the opening block, and the structure of the other end of the intermediate block is the same as that of one end of the opening block close to the opening block.
Preferably, two limit blocks are symmetrically arranged on the opposite sides of the fixed block and the propelling block from top to bottom.
Preferably, the same pairs of intermediate blocks are arranged between the fixed block and the spreading block and between the pushing block spreading blocks, and each pair of the intermediate blocks is two.
Preferably, the molding instrument comprises a support shaft and a clamping tube, the support shaft penetrates through the pushing block, the distal end of the support shaft is fixedly connected with the fixing block in the axial direction, the pushing block is in threaded connection with the support shaft, the distal end of the clamping tube limits the pushing block to rotate in the circumferential direction, and the pushing block moves in the axial direction when the support shaft rotates.
Preferably, the pusher block is provided with a slot at its proximal end, and the distal end of the gripping tube is axially slidably engaged with the slot of the pusher block.
Preferably, the proximal end of the support shaft is fixedly connected with a rotary handle.
Preferably, the proximal end of the holding tube is fixedly connected with a handle.
Preferably, the support shaft penetrates through the clamping pipe and the grab handle, and is axially limited and circumferentially and rotatably fixed with the grab handle.
Preferably, a channel is formed in one side, close to the supporting shaft, of the middle block and the opening block, and the supporting shaft is axially and fixedly connected with the fixing block after passing through the channel.
By adopting the technical scheme, compared with the prior art, the invention has the following technical effects:
(1) the minimally invasive vertebral body spreader can meet the requirements of a minimally invasive surgery working channel through a surgery working channel with the diameter of less than 7mm, and the minimal diameter ensures that the tool has wide adaptation range and small harm to a patient;
(2) the series structure of the middle blocks of the minimally invasive vertebral body spreader can realize higher vertebral body spreading height, and meet the requirements of vast doctors and patients;
(3) the minimally invasive vertebral body distracter has the advantages that the middle block and the adjacent blocks are in surface contact after distraction, the structure is more stable, and the operation is safer.
Drawings
FIG. 1 is a schematic structural view of a minimally invasive vertebral body distractor according to the present invention;
FIG. 2 is a cross-sectional view of the minimally invasive vertebral distractor of the present invention;
fig. 3 is a schematic structural view of the expanding device of the present invention;
FIG. 4 is a schematic diagram of a serial connection matching structure of the limiting blocks in the present invention;
FIG. 5 is a schematic view of the minimally invasive vertebral body distractor of the present invention before distraction;
FIG. 6 is a schematic view of the opening process of the minimally invasive vertebral body opener according to the present invention;
FIG. 7 is a schematic view showing the construction of the distractor of example 1;
1-opening device, 2-forming instrument, 3-fixing block, 4-middle block, 5-opening block, 6-pushing block, 7-limiting block, 8-supporting shaft, 9-clamping tube, 10-holding handle, 11-rotating handle and 12-working sleeve.
Detailed Description
In the description of the orientation of the present invention, the proximal end refers to the end closer to the operator, and the distal end refers to the end farther from the operator.
As shown in fig. 1 and 7, the invention provides a minimally invasive vertebral body spreader, which comprises a spreading device 1 and a forming instrument 2 for controlling the spreading of the spreading device 1; the distraction device 1 comprises a fixed block 3, a distraction block 5 and a pushing block 6; the opposite surfaces of the fixed block 3 and the propelling block 6 are provided with limit blocks 7, the limit blocks 7 are used for limiting the serial sliding of the propelling block 5 between the fixed block 3 and the propelling block 6, and when the propelling block 6 slides along the direction close to the fixed block 3, the propelling block 5 is upwards and/or downwards propped.
As shown in fig. 3-4, since the fixed block 3, the spreading block 5 and the pushing block 6 form a serial limiting structure through the limiting block 7, the intermediate block 4 can be arranged to form more serial limiting structures between the fixed block 3 and the spreading block 5 and between the spreading blocks 5 of the pushing block 6, so as to meet the spreading requirements of higher height. Wherein, the one end that the middle block 4 is close to the piece 5 of strutting is provided with stopper 7, and the structure of the other end is the same with the structure of the one end that the piece 5 of strutting is close to.
Therefore, in another embodiment, a plurality of intermediate blocks 4 are provided between the fixed block 3 and the expanding block 5, and the same number of intermediate blocks 4 are provided between the pushing block 6 and the expanding block 5.
In a specific embodiment, as shown in fig. 3-4, two limit blocks 7 are symmetrically arranged on the opposite sides of the fixed block 3 and the pushing block 6. Furthermore, the same pairs of middle blocks 4 are arranged between the fixed block 3 and the expanding block 5 and between the expanding blocks 5 of the pushing block 6, and each pair of the middle blocks 4 is two.
Further, according to the requirement of the distraction height required by the patient in practical application, the minimally invasive vertebral body distracter with different pairs of middle blocks and 4 pairs of middle blocks can be selected.
In one embodiment, as shown in fig. 2-3, the molding device 2 comprises a support shaft 8 and a holding tube 9, the support shaft 8 penetrates through the pushing block 6, the distal end of the support shaft is fixedly connected with the fixed block 3 axially after passing through the channel formed by the intermediate block 4 and/or the spreading block 5, the inner surface of the pushing block 6 is in threaded connection with the outer surface of the support shaft 8, the proximal end of the pushing block 6 is provided with a groove, the distal end of the holding tube 9 is in axial sliding fit with the groove of the pushing block 6 to limit circumferential rotation of the pushing block 6, and the pushing block 6 moves axially when the support shaft 8 rotates.
Specifically, as shown in fig. 1-2, the proximal end of the supporting shaft 8 is fixedly connected with a rotating handle 11, the proximal end of the holding tube 9 is fixedly connected with a holding handle 10, and the supporting shaft 8 penetrates through the holding tube 9 and the holding handle 10 and is axially limited and circumferentially and rotatably fixed with the holding handle 10.
The specific operation principle of the minimally invasive vertebral body dilator is as follows:
initial shrinkage state: as shown in fig. 5, the upper and lower surfaces of the spreader block 5 are flush with the upper and lower surfaces of the fixed block 3 and the pusher block 6.
S1: in minimally invasive spine surgery, the minimally invasive vertebral body distracter in a contraction state enters an intervertebral space along a minimally invasive working channel 12 until a preset position is reached, so that the purpose of minimally invasive entry is achieved;
s2: an operator holds the grab handle 10 by one hand, rotates the rotating handle 11 by the other hand to drive the supporting shaft 8 to rotate, the pushing block 6 is in threaded fit with the supporting shaft 8, the axial far end of the pushing block 6 advances under the limit of the clamping pipe 9, the pushing block 6 is limited by the axial pressure of the pushing block and the axial direction of the far end fixing block 3, the middle block 4 and/or the opening block 5 can move up and down under the serial limit of the limiting block 7, and as shown in figure 7, the purpose of opening the vertebral body is achieved.
The present invention will be described in detail and specifically with reference to the following examples to facilitate better understanding of the present invention, but the following examples do not limit the scope of the present invention.
Example 1
Referring to fig. 7, the embodiment provides a minimally invasive vertebral body distracter, which comprises a distraction device 1 and a forming instrument 2 for controlling the distraction of the distraction device 1; the distraction device 1 comprises a fixed block 3, a distraction block 5 and a pushing block 6; the opposite surfaces of the fixed block 3 and the propelling block 6 are symmetrically provided with two pairs of limiting blocks 7 up and down, through the limiting blocks 7, the two spreading blocks 5 realize symmetrical serial sliding limiting between the fixed block 3 and the propelling block 6, and when the propelling block 6 slides along the direction close to the fixed block 3, the spreading blocks 5 spread upwards and/or downwards.
In this embodiment, the molding apparatus 2 includes a supporting shaft 8 and a clamping tube 9, the supporting shaft 8 penetrates through the pushing block 6, after passing through a channel formed by the pushing block 5, the distal end is fixedly connected with the fixing block 3 in the axial direction, the inner surface of the pushing block 6 is in threaded connection with the outer surface of the supporting shaft 8, a groove is formed in the proximal end of the pushing block 6, the distal end of the clamping tube 9 is in axial sliding fit with the groove of the pushing block 6, the circumferential rotation of the pushing block 6 is limited, and the pushing block 6 moves in the axial direction when the supporting shaft 8 rotates.
In this embodiment, as shown in fig. 1-2, the proximal end of the supporting shaft 8 is fixedly connected to a rotating handle 11, the proximal end of the holding tube 9 is fixedly connected to a handle 10, and the supporting shaft 8 penetrates through the holding tube 9 and the handle 10, and is axially limited and circumferentially rotatably fixed to the handle 10.
Example 2
The embodiment provides a minimally invasive vertebral body distractor, which comprises a distraction device 1 and a forming instrument 2 for controlling the distraction of the distraction device 1; the distraction device 1 comprises a fixed block 3, a distraction block 5 and a pushing block 6; fixed block 3 and propulsion piece 6 opposite face longitudinal symmetry are provided with stopper 7, stopper 7 is close to the one end of strutting piece 5 and connects a middle part 4 through establishing ties limit structure, the other end of middle part 4 with strut piece 5 and be connected, when propulsion piece 6 slides along the direction that is close to fixed block 3, middle part 4 with strut piece 5 upwards and/or strut downwards, wherein middle part 4 is close to the one end of strutting piece 5 and is provided with stopper 7, the structure of the other end is the same with the structure of the one end that struts piece 5 and is close to.
In this embodiment, the molding apparatus 2 includes a supporting shaft 8 and a clamping tube 9, the supporting shaft 8 penetrates through the pushing block 6, after passing through the middle block 4 and the channel formed by the opening block 5, the distal end is fixedly connected with the fixed block 3 in the axial direction, the inner surface of the pushing block 6 is in threaded connection with the outer surface of the supporting shaft 8, the proximal end of the pushing block 6 is provided with a groove, the distal end of the clamping tube 9 is in axial sliding fit with the groove of the pushing block 6 to limit the pushing block 6 to rotate in the circumferential direction, and the pushing block 6 moves in the axial direction when the supporting shaft.
Specifically, as shown in fig. 1-2, the proximal end of the supporting shaft 8 is fixedly connected with a rotating handle 11, the proximal end of the holding tube 9 is fixedly connected with a holding handle 10, and the supporting shaft 8 penetrates through the holding tube 9 and the holding handle 10 and is axially limited and circumferentially and rotatably fixed with the holding handle 10.
The embodiments of the present invention have been described in detail, but the embodiments are merely examples, and the present invention is not limited to the embodiments described above. Any equivalent modifications and substitutions to those skilled in the art are also within the scope of the present invention. Accordingly, equivalent changes and modifications made without departing from the spirit and scope of the present invention should be covered by the present invention.
Claims (10)
1. A minimally invasive vertebral body distracter is characterized by comprising a distraction device (1) and a forming instrument (2) for controlling the distraction of the distraction device (1); the unfolding device (1) comprises a fixed block (3), an unfolding block (5) and a pushing block (6); fixed block (3) with advance piece (6) opposite face and be provided with stopper (7), through stopper (7), prop open piece (5) and be in fixed block (3) with it is spacing to realize establishing ties to slide in the middle of advancing piece (6), it is along being close to advance piece (6) when the direction of fixed block (3) slides, prop open piece (5) upwards and/or strut downwards.
2. The minimally invasive vertebral body distractor according to claim 1, wherein a plurality of intermediate blocks (4) are arranged between the fixed block (3) and the distracting block (5), the same number of intermediate blocks (4) are arranged between the pushing block (6) and the distracting block (5), the limiting block (7) is arranged at one end of the intermediate block (4) close to the distracting block (5), and the structure of the other end is the same as that of one end of the distracting block (5).
3. The minimally invasive vertebral body distractor according to claim 1, wherein two limiting blocks (7) are symmetrically arranged on the opposite sides of the fixed block (3) and the pushing block (6) up and down.
4. The minimally invasive vertebral body distractor according to claim 3, wherein the same number of pairs of intermediate blocks (4) are arranged between the fixed block (3) and the distraction block (5) and between the distraction blocks (5) of the propulsion block (6), and each pair of the intermediate blocks (4) is two.
5. The minimally invasive vertebral body distractor according to claim 1, wherein the molding instrument (2) comprises a support shaft (8) and a clamping tube (9), after the support shaft (8) penetrates through the pushing block (6), the distal end of the support shaft is axially and fixedly connected with the fixed block (3), the pushing block (6) is in threaded connection with the support shaft (8), the distal end of the clamping tube (9) limits circumferential rotation of the pushing block (6), and the pushing block (6) axially moves when the support shaft (8) rotates.
6. The minimally invasive vertebral body distractor according to claim 5, wherein the proximal end of the pushing block (6) is provided with a groove, and the distal end of the clamping tube (9) is axially slidably fitted with the groove of the pushing block (6).
7. The minimally invasive vertebral distractor according to claim 5, wherein the proximal end of the support shaft (8) is fixedly connected with a rotating handle (11).
8. The minimally invasive vertebral body distractor according to claim 5, wherein the proximal end of the clamping tube (9) is fixedly connected with a handle (10).
9. The minimally invasive vertebral body distractor according to claim 8, wherein the support shaft (8) penetrates through the clamping tube (9) and the grip (10) and is axially limited and circumferentially rotatably fixed with the grip (10).
10. The minimally invasive vertebral body distractor according to claim 2, wherein a channel is formed in one side of the middle block (4) and the distraction block (5) close to the supporting shaft (8), and the supporting shaft (8) is axially and fixedly connected with the fixing block (3) after passing through the channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011166004.9A CN112220510A (en) | 2020-10-27 | 2020-10-27 | Minimally invasive vertebral body dilator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011166004.9A CN112220510A (en) | 2020-10-27 | 2020-10-27 | Minimally invasive vertebral body dilator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112220510A true CN112220510A (en) | 2021-01-15 |
Family
ID=74109095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011166004.9A Pending CN112220510A (en) | 2020-10-27 | 2020-10-27 | Minimally invasive vertebral body dilator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112220510A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203483491U (en) * | 2013-09-30 | 2014-03-19 | 宋扬 | Vertebral body dilator |
| US20170156763A1 (en) * | 2004-10-20 | 2017-06-08 | The Board Of Trustees Of The Leland Stanford Junior University | Systems and methods for posterior dynamic stabilization of the spine |
| US20180296361A1 (en) * | 2013-03-13 | 2018-10-18 | Life Spine, Inc. | Expandable spinal interbody assembly |
| US20200093609A1 (en) * | 2017-01-10 | 2020-03-26 | Integrity Implants Inc. | Spinal fusion device with staged expansion |
| CN111759436A (en) * | 2020-07-23 | 2020-10-13 | 山东第一医科大学附属省立医院(山东省立医院) | Self-guiding four-side expandable under-mirror bone grafting interbody fusion cage |
-
2020
- 2020-10-27 CN CN202011166004.9A patent/CN112220510A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170156763A1 (en) * | 2004-10-20 | 2017-06-08 | The Board Of Trustees Of The Leland Stanford Junior University | Systems and methods for posterior dynamic stabilization of the spine |
| US20180296361A1 (en) * | 2013-03-13 | 2018-10-18 | Life Spine, Inc. | Expandable spinal interbody assembly |
| CN203483491U (en) * | 2013-09-30 | 2014-03-19 | 宋扬 | Vertebral body dilator |
| US20200093609A1 (en) * | 2017-01-10 | 2020-03-26 | Integrity Implants Inc. | Spinal fusion device with staged expansion |
| CN111759436A (en) * | 2020-07-23 | 2020-10-13 | 山东第一医科大学附属省立医院(山东省立医院) | Self-guiding four-side expandable under-mirror bone grafting interbody fusion cage |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10993747B2 (en) | Methods and devices for improving percutaneous access in minimally invasive surgeries | |
| US10952718B2 (en) | Surgical retractor system and method | |
| US11357552B2 (en) | Devices and methods for inserting a vertebral fixation member | |
| US6569168B2 (en) | Intervertebral distractor and implant insertion instrument | |
| CN103505264B (en) | Minimally invasive surgical instrument for treating thoracolumbar spine burst fracture through vertebral pedicle tunnel | |
| US8911364B2 (en) | Spine retractor and distractor device | |
| JP6216191B2 (en) | Surgical instruments for minimally invasive spinal fixation and surgical systems including surgical instruments | |
| AU2003260019B2 (en) | Device and method for percutaneous placement of lumbar pedicle screws and connecting rods | |
| AU2014241502B2 (en) | Devices and methods for monoaxial screw conversion | |
| US20120277864A1 (en) | Cannula assembly with non-circular profile and method of use | |
| US20140074106A1 (en) | Working tower, rod inserter, rod reducer, and compression-distraction tool for minimally invasive surgery system | |
| US20030220650A1 (en) | Minimally invasive bone manipulation device and method of use | |
| US20150209023A1 (en) | Two-Stage Spinal Access Assembly | |
| US20100249856A1 (en) | Devices and Methods for Inserting a Vertebral Fixation Member | |
| WO2007033583A1 (en) | A bone dilator | |
| US20180289363A1 (en) | Surgical access system, devices thereof, and methods of using the same | |
| US11730493B2 (en) | Methods and apparatus for performing discectomy | |
| JP6764951B2 (en) | Devices and kits for positioning implants for interbody fusion | |
| CN112220510A (en) | Minimally invasive vertebral body dilator | |
| Ahn et al. | Minimally invasive posterior cervical foraminotomy | |
| CN211862895U (en) | Minimally invasive intervertebral disc treatment tool | |
| CN110652334A (en) | Minimally invasive intervertebral disc treatment tool | |
| CN213787647U (en) | Expanding intervertebral disc processing tool | |
| US11759233B2 (en) | Optical cannula | |
| CN115054350B (en) | Internal distraction reduction device for vertebrae |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210115 |
|
| RJ01 | Rejection of invention patent application after publication |