CN112494131A - Vertebral body support device - Google Patents
Vertebral body support device Download PDFInfo
- Publication number
- CN112494131A CN112494131A CN202011226035.9A CN202011226035A CN112494131A CN 112494131 A CN112494131 A CN 112494131A CN 202011226035 A CN202011226035 A CN 202011226035A CN 112494131 A CN112494131 A CN 112494131A
- Authority
- CN
- China
- Prior art keywords
- vertebral body
- opening
- vertebral
- body support
- mesh body
- 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
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 11
- 230000008859 change Effects 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 9
- 230000007423 decrease Effects 0.000 claims description 4
- 229910001000 nickel titanium Inorganic materials 0.000 claims description 4
- 230000003247 decreasing effect Effects 0.000 claims description 3
- HLXZNVUGXRDIFK-UHFFFAOYSA-N nickel titanium Chemical compound [Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni] HLXZNVUGXRDIFK-UHFFFAOYSA-N 0.000 claims 1
- 230000007704 transition Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 13
- 230000004308 accommodation Effects 0.000 abstract description 6
- 239000002639 bone cement Substances 0.000 description 39
- 238000000034 method Methods 0.000 description 7
- 238000000465 moulding Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000001125 extrusion Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 206010010214 Compression fracture Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000010339 dilation Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- A61B17/56—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
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
- A61B17/885—Tools for expanding or compacting bones or discs or cavities therein
-
- 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
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
- A61B17/8802—Equipment for handling bone cement or other fluid fillers
- A61B17/8805—Equipment for handling bone cement or other fluid fillers for introducing fluid filler into bone or extracting it
Abstract
The invention belongs to the technical field of medical instruments and discloses a vertebral body support device. The vertebral body support device comprises: the flexible grid main part, the flexible grid main part is constructed and is had initial condition and the state of strutting, and under initial condition, the flexible grid main part is the tubulose, and under the state of strutting, the flexible grid main part is the sacculus to form the accommodation space who is used for holding outside bone expander in the inside of flexible grid main part, wherein, at least one end of flexible grid main part is constructed and is had the opening of fixed size, so that the size of opening does not change when the initial condition changes to the state of strutting along with flexible grid main part. The vertebral body support device can improve the forming effect of the vertebral body support device, thereby providing ideal distraction height for the vertebral body.
Description
Technical Field
The invention belongs to the field of medical instruments, and particularly relates to a vertebral body support device.
Background
Percutaneous puncture minimally invasive treatment of vertebral compression fracture generally adopts the following treatment methods: a bone-inserting dilator (such as a dilation balloon and the like) is arranged in the collapsed vertebral body, after the height of the collapsed vertebral body is lifted by the bone dilator, bone cement is injected into the vertebral body to strengthen the vertebral body, so that most of the original height of the diseased vertebral body can be recovered, and the aim of correcting the vertebral column is fulfilled.
However, the above bone expander needs to be restored and extracted from the vertebral body after expanding the collapsed vertebral body, and the height of the vertebral body which is supported after extraction can not be completely maintained under the elastic creep extrusion of the adjacent upper and lower intervertebral discs, so that the problem that the vertebral body height is lost again exists in the operation.
In order to solve the problem of the loss of the vertebral body height in the operation, the vertebral body support and the bone expander are commonly adopted in the prior art to keep the vertebral body height in the operation, namely the vertebral body support is supported to an ideal position through the bone expander, then the bone expander is taken out from the vertebral body support, and bone cement is filled in the vertebral body support, so that the vertebral body keeps the ideal height.
Although the existing vertebral body support device can be expanded to a strutting state from an initial state, the height of the vertebral body in the operation can be kept after filling bone cement, but the structure of the existing vertebral body support device is generally a hollow cylindrical structure as shown in fig. 10 when being completely propped, and when the existing vertebral body support device is in actual use, the openings 12 ' at two ends of the hollow cylindrical structure can be gradually increased in the strutting process, namely the size of the opening 12 ' is always the same as the inner diameter of the hollow cylindrical structure, and a large amount of bone cement can leak out from the openings 12 ' at two ends to influence the forming effect.
Disclosure of Invention
In order to improve the molding effect and provide an ideal distraction height for the vertebral body, the invention provides a vertebral body support.
The vertebral body support device comprises: the flexible grid main part, the flexible grid main part is constructed and is had initial condition and the state of strutting, and under initial condition, the flexible grid main part is the tubulose, and under the state of strutting, the flexible grid main part is the sacculus to form the accommodation space who is used for holding outside bone expander in the inside of flexible grid main part, wherein, at least one end of flexible grid main part is constructed and is had the opening of fixed size, so that the size of opening does not change when the initial condition changes to the state of strutting along with flexible grid main part.
Further, both opposite ends of the telescopic grid body are configured with fixed-size openings.
Further, the opening of one end of the telescopic grid main body is larger than the opening of the other end.
Further, the smaller openings of the telescopic grid body are sealed by the sealing member.
Furthermore, the periphery of the opening is fixedly sleeved with a fixing ring.
Further, the retaining ring has a radial dimension that gradually decreases in a direction approaching the telescoping mesh body.
Further, in the expanded state, the telescopic grid body has a radial dimension that gradually decreases from the middle to both ends in the axial direction.
Further, the telescopic grid body is formed by connecting a plurality of axial lines and a plurality of radial lines in a staggered manner.
Further, the axial lines and the radial lines are configured in a wave shape.
Further, the telescopic grid body is made of a nickel titanium alloy material.
Compared with the prior art, the vertebral body support has the following advantages:
1) at least one end of the telescopic grid main body is constructed into an opening with a fixed size, so that the opening cannot be enlarged in the process of injecting bone cement into the accommodating space, the phenomenon that a large amount of bone cement leaks from the enlarged opening cannot occur, the bone cement can fully play a role in supporting a vertebral body in the accommodating space, a better molding effect is achieved, and an ideal opening height is provided for the vertebral body.
2) The less opening through setting up flexible net main part is sealed by sealing component and can further avoid pouring into the bone cement in the accommodation space and spill through less opening, improves bone cement's utilization efficiency, saves bone cement's quantity.
3) The size of the opening can be further kept unchanged by fixedly sleeving the fixing ring on the periphery of the opening, so that the vertebral body support has a better molding effect.
4) The radial size that has through setting up solid fixed ring and gradually reduce in the direction that is close to flexible net main part can further reduce bone cement and spill flexible net main part, saves the quantity of bone cement.
5) The axial lines and the radial lines are wavy, so that the occupied space of the telescopic grid body is smaller in an initial state; under the state of strutting, the accommodation space of flexible net main part is bigger, can hold more bone cement, still applicable not centrum of equidimension under the prerequisite of guaranteeing the shaping effect.
Drawings
Fig. 1 is a schematic structural view of a vertebral body support according to a first embodiment of the present invention, showing an initial state of the vertebral body support;
FIG. 2 is a schematic structural view of the vertebral support according to the first embodiment of the present invention, showing the vertebral support in an expanded state;
FIG. 3 is a front view of the vertebral body support of FIG. 2;
FIG. 4 is a right side elevational view of the vertebral body support of FIG. 2;
FIG. 5 is a schematic view of the retaining ring shown in FIG. 2;
fig. 6 is a schematic structural view of a vertebral body support according to a second embodiment of the present invention, showing an initial state of the vertebral body support;
FIG. 7 is a schematic structural view of a vertebral body support according to a second embodiment of the present invention, showing the vertebral body support in an expanded state;
fig. 8 is a schematic structural view of a vertebral body support according to a third embodiment of the present invention, showing an initial state of the vertebral body support;
FIG. 9 is a schematic structural view of a vertebral body support according to a third embodiment of the present invention, showing the expanded state of the vertebral body support
Fig. 10 is a schematic view of a prior art vertebral body support.
Detailed Description
For a better understanding of the objects, structure and function of the invention, the vertebral body support of the present invention will be described in further detail with reference to the accompanying drawings.
Fig. 1-4 illustrate the structure of a vertebral support 100 according to a first embodiment of the present invention, comprising: the telescopic grid body 1, the telescopic grid body 1 is configured to have an initial state as shown in fig. 1 and a spread state as shown in fig. 2, in the initial state, the telescopic grid body 1 is tubular, in the spread state, the telescopic grid body 1 is bag-shaped, so as to form an accommodating space 11 for accommodating an external bone expander inside the telescopic grid body 1, wherein at least one end of the telescopic grid body 1 is configured to have an opening 12 with a fixed size, so that the size of the opening 12 is not changed when the telescopic grid body 1 is converted from the initial state to the spread state.
It should be noted that, as mentioned above, "in the initial state, the telescopic grid body 1 is tubular," which may be understood as a tubular shape having a circular tubular shape and a polygonal cross-sectional shape, and may also be understood as a conical tubular shape; the "bag shape" in the "bag shape of the extendable grid body 2 in the extended state" is understood to mean a spherical shape, an ellipsoidal shape, or any irregular shape, and is not particularly limited herein.
When the vertebral body support 100 of the embodiment of the invention is used, firstly, the vertebral body support 100 is placed in a collapsed vertebral body, the external bone dilator enters the interior of the vertebral body support 100 through the opening 12 and props the vertebral body support 100 to an ideal position (the "ideal position" corresponds to the height when the vertebral body is not collapsed), so that the telescopic grid body 1 reaches an ideal propping state from an initial state, at the moment, the telescopic grid body 1 is always kept in the propping state, namely, the propping structure cannot rebound, then, the external bone dilator is taken out of the vertebral body support 100 and is filled with bone cement into the accommodating space 11 of the telescopic grid body 1 through the opening 12, and after the bone cement is solidified, the vertebral body support 100 can stably achieve the purpose of keeping the vertebral body at the height when the vertebral body is not collapsed.
The vertebral body support 100 of the embodiment constructs at least one end of the telescopic grid body 1 into the opening 12 with a fixed size, so that the size of the opening 12 is not increased all the time in the process that bone cement is injected into the accommodating space 11, and therefore, the phenomenon that a large amount of bone cement leaks out from the increased opening does not occur, and therefore, the bone cement can fully exert the effect of supporting the vertebral body in the accommodating space 11, and the vertebral body support has a better molding effect, and provides an ideal expansion height for the vertebral body.
In a second embodiment of a vertebral body support 100 according to the invention as shown in fig. 6 and 7, the opposite ends of the telescopic grid body 1 may each be configured with a fixed size opening 12. In the actual manufacturing process, the openings 12 are naturally formed at the two ends of the telescopic grid body 1, and an operator can choose to inject bone cement into the openings 12 at any end, so that the operation is more convenient.
In a preferred embodiment, as shown in fig. 7, the opening 12 "at one end of the telescopic grid body 1 may be larger than the opening 12 at the other end. It is further preferred that the larger size of the opening 12 "is available for pouring bone cement. The arrangement can facilitate the rapid filling of the bone cement into the accommodating space 11, and meanwhile, the bone cement is not easy to lose from the opening 12 with smaller size, thereby saving the using amount of the bone cement and being also beneficial to improving the forming effect of the vertebral body support 100.
Of course, the size of the openings 12 at the two ends of the telescopic grid main body 1 can be the same, when the size of the two openings 12 is the same, the manufacture is simple, the two openings 12 and the whole telescopic grid main body 1 can be used for pouring bone cement, and meanwhile, the stress of the two openings 12 and the whole telescopic grid main body 1 is more uniform in an initial state or a spreading state, so that the influence on the service life caused by the uneven stress is avoided.
As shown in fig. 1 and 2, the smaller opening 12 of the telescopic grid body 1 may be always sealed by the sealing member 2. Through this setting can further avoid pouring into the bone cement in the accommodation space 11 and spill through less opening 12, improve bone cement's utilization efficiency, save bone cement's quantity.
The sealing part 2 can be in a cone column shape, the minimum outer diameter of the cone column-shaped sealing part 2 is smaller than or equal to the inner diameter of the small opening, the maximum outer diameter of the cone column-shaped sealing part 2 is larger than the inner diameter of the small opening and smaller than or equal to the inner diameter of the large opening, the arrangement enables the sealing part 2 to enter the small opening through the inner diameter of the large opening and block the small opening like a plug, the small opening is blocked more and more tightly under the extrusion of subsequent bone cement, and meanwhile the sealing part 2 is ensured not to be extruded out of the small opening due to the extrusion of the subsequent bone cement.
The vertebral body support 100 of the third embodiment shown in fig. 8 and 9 is provided with an opening 12, and the other end opposite to the opening 12 is closed, and bone cement can be injected from the opening 12.
According to the vertebral body support 100 of the present embodiment, as shown in fig. 1, the periphery of the opening 12 can be fixedly sleeved with a fixing ring 3. Because the telescopic grid body 1 is a telescopic structure, as the accommodating space 11 is increased, or as bone cement is injected from the opening, the telescopic grid body 1 near the opening 12 may have slight deformation, so that the size of the opening 12 changes, thereby affecting the molding effect. By additionally sleeving the fixing ring 3 outside the opening 12, the size of the opening 12 can be further ensured to be constant, so that the vertebral body support 100 has a better molding effect.
As shown in fig. 5, preferably, the fixing ring 3 may have a radial dimension gradually decreasing in a direction approaching the telescopic grid body 1. With this arrangement, the process of injecting the bone cement through the retainer ring 3 flows from the end of the retainer ring 3 having a larger radial dimension to the end having a smaller radial dimension, and the bone cement is compressed in this process, so that the bone cement can be smoothly injected into the accommodating space 11 while the bone cement is not easily flowed out from the end having a smaller radial dimension.
According to the vertebral body support 100 of the above two embodiments of the present invention, in the expanded state, the telescopic grid body 1 may have a radial dimension gradually decreasing from the middle to both ends in the axial direction. Taking as an example the first embodiment as shown in fig. 1-3, in the expanded state, the telescopic grid body 1 may have a radial dimension that gradually decreases from the middle to both ends in the axial direction a. The use amount of the bone cement can be reduced through the arrangement, the utilization efficiency of the bone cement is improved, and the economic efficiency is better.
According to the present invention, as shown in fig. 3, the telescopic grid body 1 may be configured to be formed by connecting a plurality of axial lines 13 and a plurality of radial lines 14 to each other in a staggered manner. Make flexible net main part 1 can pull each other at the in-process axial lines 13 that struts and radial lines 14 through this setting and drag, change and take place deformation more, and difficult emergence after taking place deformation kick-backs, the hole that is formed by axial lines 13 and radial lines 14 simultaneously is more even, has better shaping effect after pouring into bone cement and solidification. It should be understood that the telescopic grid body 1 in all the embodiments may be configured to be formed by connecting a plurality of axial lines 13 and a plurality of radial lines 14 to each other in a staggered manner.
Preferably, the axial lines 13 and the radial lines 14 may be configured in a wavy manner. Because the wavy lines have better stretchability, the occupied space of the telescopic grid body 1 is smaller in the initial state; under the state of strutting, the accommodation space 11 of flexible net main part 1 is bigger, can hold more bone cement, still applicable not centrum of equidimension under the prerequisite of guaranteeing the shaping effect.
Further, the telescopic mesh body 1 may be made of a nickel titanium alloy material. The nickel-titanium alloy is a shape memory alloy with the characteristics of wear resistance, corrosion resistance, high damping, superelasticity and the like. Through the arrangement, the telescopic grid main body 1 can be smoothly changed from the initial state to the distraction state, is not easy to change from the distraction state to the initial state, has better forming and supporting functions, does not have rejection reaction with a human body, and has longer service life.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. A vertebral body support, comprising: a telescopic mesh body configured to have an initial state in which the telescopic mesh body is tubular and an expanded state in which the telescopic mesh body is saccular to form an accommodating space for accommodating an external bone expander inside the telescopic mesh body,
wherein at least one end of the telescoping mesh body is configured with an opening of a fixed size such that the size of the opening does not change as the telescoping mesh body transitions from the initial state to the distracted state.
2. A vertebral support according to claim 1 wherein said openings of fixed size are configured at both opposing ends of said telescoping mesh body.
3. A vertebral support according to claim 2 wherein said opening at one end of said telescoping mesh body is larger than said opening at the other end.
4. A vertebral support according to claim 3 wherein said smaller opening of said telescoping mesh body is sealed by a sealing member.
5. A vertebral body support according to any one of claims 1 to 4 wherein the periphery of said opening is fixedly sleeved with a fixation ring.
6. A vertebral support according to claim 5 wherein said fixation ring has a decreasing radial dimension in a direction proximal to said telescoping mesh body.
7. A vertebral support according to any one of claims 1 to 4 wherein in said expanded state the telescopic grid body has a radial dimension which decreases progressively from the middle to both ends in the axial direction.
8. A vertebral support according to any one of claims 1 to 4 wherein said telescoping mesh body is configured to be formed from a plurality of axial lines and a plurality of radial lines interdigited with one another.
9. A vertebral body support according to claim 8 wherein said axial lines and said radial lines are contoured in a wave-like manner.
10. A vertebral body support according to any one of claims 1 to 4 wherein said telescoping mesh body is made of nitinol material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011226035.9A CN112494131A (en) | 2020-11-05 | 2020-11-05 | Vertebral body support device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011226035.9A CN112494131A (en) | 2020-11-05 | 2020-11-05 | Vertebral body support device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112494131A true CN112494131A (en) | 2021-03-16 |
Family
ID=74955273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011226035.9A Pending CN112494131A (en) | 2020-11-05 | 2020-11-05 | Vertebral body support device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112494131A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201147363Y (en) * | 2007-07-06 | 2008-11-12 | 刘小勇 | Corpus vertebrae expansible orthopedic positor |
| CN106137366A (en) * | 2016-07-27 | 2016-11-23 | 刘小勇 | A kind of memory alloy pipes making Expansible centrum support frame |
| CN109044513A (en) * | 2018-08-12 | 2018-12-21 | 苏州爱得科技发展股份有限公司 | A kind of centrum support |
| CN110464442A (en) * | 2019-09-05 | 2019-11-19 | 北京爱康宜诚医疗器材有限公司 | Bone inner support device |
-
2020
- 2020-11-05 CN CN202011226035.9A patent/CN112494131A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201147363Y (en) * | 2007-07-06 | 2008-11-12 | 刘小勇 | Corpus vertebrae expansible orthopedic positor |
| CN106137366A (en) * | 2016-07-27 | 2016-11-23 | 刘小勇 | A kind of memory alloy pipes making Expansible centrum support frame |
| CN109044513A (en) * | 2018-08-12 | 2018-12-21 | 苏州爱得科技发展股份有限公司 | A kind of centrum support |
| CN110464442A (en) * | 2019-09-05 | 2019-11-19 | 北京爱康宜诚医疗器材有限公司 | Bone inner support device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101530343B (en) | Implant for stabilizing vertebrae or bones | |
| CN102510742A (en) | Expanding intervertebral device and methods of use | |
| CN104306054B (en) | A kind of expansible vertebral plasty support | |
| CN103654923A (en) | Support system capable of preventing bone cement leakage and application thereof | |
| CN112494131A (en) | Vertebral body support device | |
| CN213606817U (en) | Centrum struts filling device and propeller | |
| CN204147102U (en) | A kind of expansible vertebral plasty support | |
| CN108113782B (en) | Vertebral body fusion cage | |
| CN213552242U (en) | Balloon dilatation stent for vertebroplasty | |
| CN206120427U (en) | Integral type expansible sacculus bag bagging apparatus | |
| CN211460689U (en) | Distracting intervertebral disc fusion device | |
| CN112120778B (en) | Centrum struts filling device and propeller | |
| CN210114542U (en) | Spinal support | |
| CN108095859A (en) | The netted molding machine of orthopaedics | |
| CN106618819B (en) | Blood vessel stent and stent component | |
| CN209203473U (en) | A kind of centrum support | |
| CN111467094A (en) | Percutaneous intervertebral fusion system | |
| CN109833122A (en) | A kind of spinal brace | |
| JP2017532137A (en) | Stent for percutaneous spine formation | |
| CN217696772U (en) | Femoral head necrosis core decompression postoperative support frame | |
| CN102973313B (en) | Fixing and sealing device and delivering device of degradable high molecular reticulated sacculus | |
| CN207785643U (en) | Expand urethral orifice operation auxiliary device in Urology Surgery | |
| CN206576992U (en) | A kind of conveying pusher of intravascular stent | |
| CN212416000U (en) | Percutaneous intervertebral fusion system | |
| CN109044513A (en) | A kind of centrum support |
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: 20210316 |
|
| RJ01 | Rejection of invention patent application after publication |