CN114431905A - Vertebral body dilator - Google Patents
Vertebral body dilator Download PDFInfo
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- CN114431905A CN114431905A CN202011208984.4A CN202011208984A CN114431905A CN 114431905 A CN114431905 A CN 114431905A CN 202011208984 A CN202011208984 A CN 202011208984A CN 114431905 A CN114431905 A CN 114431905A
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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
- A61B17/02—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
- A61B17/025—Joint distractors
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4601—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for introducing bone substitute, for implanting bone graft implants or for compacting them in the bone cavity
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- A—HUMAN NECESSITIES
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- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
- A61F2/4611—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof of spinal prostheses
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4684—Trial or dummy prostheses
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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
- A61B17/02—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
- A61B17/025—Joint distractors
- A61B2017/0256—Joint distractors for the spine
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Abstract
The invention relates to a vertebral body spreader, which comprises: the tail pushing mechanism comprises a core pipe, a push rod, a tail pushing mechanism and two opening plates, wherein the push rod is partially arranged in the core pipe, and two ends of the push rod are positioned outside the core pipe; the tail pushing mechanism is connected to one end of the core tube and connected with the push rod, the tail pushing mechanism is used for driving the push rod to move axially along the core tube, and an indicating structure is arranged on the tail pushing mechanism; the device comprises at least one pair of first spreading arms and one pair of second spreading arms, wherein one ends of the two first spreading arms are movably connected to a push rod and a core pipe respectively, and one ends of the two first spreading arms are movably connected to the push rod and the core pipe respectively; the two opening plates are respectively and movably connected to the other ends of the first opening arm and the second opening arm; in an opening state, the tail pushing mechanism drives the push rod to move towards the tail pushing mechanism, so that each group of the spreading arms is spread, and the two spreading plates are spread in parallel; and when in the folding state, the two opening plates are folded.
Description
Technical Field
The invention relates to the technical field of vertebral body opening test, in particular to a vertebral body opening device.
Background
PLIF/TLIF is used as the most widely applied thoracolumbar intervertebral fusion at home and abroad. In the operation process, the degenerated intervertebral disc or the nucleus pulposus which presses the nerve needs to be taken out, the upper vertebral body and the lower vertebral body are distracted by the distracter and the trial model in a matched mode for restoration, the specification which is most suitable for the physiological requirement is found out at the same time, and then the fusion cage implant with the corresponding specification is implanted so as to remove the sign of disease and meet the normal physiological curvature of the spine of the human body. In the process of the distraction vertebral body reduction, the distractors with different specifications need to be inserted, rotated and taken out in sequence from small to large, and finally the final specification of the fusion device implant specification is found out by inserting the test mold, a series of actions need to consume a certain time, and the intervertebral tissues are damaged by repeating the actions.
The existing test mould products in the market are changed in a height gradient of every 1mm, the design requirements on the distracter are very high, the operation consumes time, the number of tools is large, and the damage to vertebral plate tissues is large.
Disclosure of Invention
The invention provides a vertebral body dilator, which solves the technical problem of the fussy process that a vertebral body needs to be firstly dilated and then a test mold needs to be replaced and the specification of a fusion cage needs to be found out in the existing PLIF/TLIF operation process.
The technical scheme provided by the invention is as follows:
a vertebral body distractor comprising:
a core tube;
the push rod is partially arranged in the core tube, and two ends of the push rod are positioned outside the core tube;
the tail pushing mechanism is connected to one end of the core tube and connected with the push rod, the tail pushing mechanism is used for driving the push rod to move axially along the core tube, and an indicating structure is arranged on the tail pushing mechanism and used for indicating the spreading height of the push rod in the spreading or folding process;
the device comprises at least one pair of first spreading arms and one pair of second spreading arms, wherein one ends of the two first spreading arms are respectively and movably connected to a push rod and a core tube, and one ends of the two second spreading arms are respectively and movably connected to the push rod and the core tube;
first opening plate and the second opening plate that sets up relatively, first opening plate and two first one end swing joint respectively that the arm is close to is propped open mutually to the second, the second is propped open plate and two the second props the arm and is close to one end swing joint respectively, and two first arm and two of propping open the second props the arm and all mutually supports mutually that the one end that the arm is close to mutually.
In the technical scheme, a pair of first distraction arms and a pair of second distraction arms are arranged, one ends, close to each other, of the first distraction arms are respectively connected with the first distraction plates, one ends, close to each other, of the second distraction arms are respectively connected with the second distraction plates, the two first distraction arms are mutually matched, and the two second distraction arms are mutually matched, so that the tail pushing mechanism can ensure that the distraction plates are stably distracted when being pushed, the distraction plates cannot incline, the size of the interbody fusion cage can be more accurately obtained and can be better performed, and when the vertebral body is reset, the indicating mechanism can accurately read the size of the interbody fusion cage, so that a doctor can select a proper interbody fusion cage to perform an operation;
in the opening state, the tail pushing mechanism drives the push rod to move towards the direction close to the tail pushing mechanism, so that the push rod drives the first opening arm and the second opening arm to respectively open the first opening plate and the second opening plate;
in the folding process, the tail pushing mechanism drives the push rod to move towards the direction far away from the tail pushing mechanism, so that the first opening arm and the second opening arm are folded and contained between the first opening plate and the second opening plate.
This scheme closes examination mould and spreader as an organic whole, so that the centrum spreader that can directly pass through in this scheme in the in-process of operation struts the size information that obtains required fusion ware, need not be like in the past, strut the centrum earlier, then through putting into examination mould, from the minimum dimension of examination mould to one-step attempt of maximum dimension, finally obtain the size of suitable interbody fusion ware, traditional examination mould of comparison is in operation process's operation, the operation step is simple, the operation time has been shortened, avoid frequent change examination mould simultaneously and cause the damage to the soft tissue of health, can be favorable to making the quick recovery of health.
Preferably, the first spreading arm and the second spreading arm are both provided with a hinged end and an engaging end, and the engaging end is provided with teeth;
the hinged ends of the two first spreading arms are respectively connected to the push rod and the core tube, the meshing ends of the two first spreading arms are respectively connected to the corresponding spreading plates, and the meshing ends of the two first spreading arms are meshed with each other;
the hinged ends of the two second spreading arms are respectively connected to the push rod and the core pipe, the meshing ends of the two second spreading arms are respectively connected to the corresponding spreading plates, and the meshing ends of the two first spreading arms are meshed with each other.
In the technical scheme, one end of each of the two first spreading arms and one end of each of the two second spreading arms, which are close to each other, are designed into a shape of teeth, and the two ends of each of the two first spreading arms and the two ends of each of the two second spreading arms, which are close to each other, are meshed with each other, so that the first spreading arms and the second spreading arms can be more stable when spreading the first spreading plates and the second spreading plates, and in the spreading process, the first spreading plates and the second spreading plates are opened in parallel, and the first spreading plates are opened in parallel, so that the distance between the first spreading plates and the second spreading plates is increased in parallel, compared with the conventional spreader, more spreading arms are required to be added for maintaining the stability of the two spreading plates, or other structures are required, and the volume of the far end of the whole spreader is larger, and the spreader with a larger volume is not suitable for use as a test model, and the spreader with one end of each of the two first spreading arms close to each other and the two second spreading arms close to each other is not suitable for use as a test model The end is set in a tooth meshing mode, so that the volume of the far end of the vertebral body distracter is greatly reduced, and the vertebral body distracter can be stably distracted and used as a test mold.
Preferably, a first matching position is arranged on the first spreading arm, and a second matching position corresponding to the first matching position is arranged on the second spreading arm corresponding to the first spreading arm, so that the first spreading arm and the second spreading arm are integrated when being folded.
In this technical scheme, be equipped with first cooperation position on the lateral wall of first arm of strutting through setting up, be equipped with second cooperation position on the lateral wall of second arm of strutting, and first cooperation position and second cooperation position set up relatively, so that when folding, first cooperation position and second cooperation position can be fine cooperate, thereby make first arm of strutting and the second arm of strutting that corresponds fold into a whole, thereby reduce the centrum and strut the one end volume that the tail pushed away the mechanism greatly, so that the volume of the distal end that the centrum that makes the formation strut is littleer, can be better remove the use as the examination mould.
Preferably, a first inclined groove is formed in the first opening arm to form the first matching position, a second inclined groove matched with the first opening arm is formed in the second opening arm hinged to the same position with the first opening arm to form the second matching position, and when the first opening arm and the second opening arm are closed, the first opening arm and the second opening arm are matched with each other to form a whole.
In this technical scheme, through set up first chute on first arm of strutting, set up the second chute on the second arm of strutting, when first arm of strutting and the second arm of strutting that corresponds fold, first chute and second chute are central symmetry, so that the first arm of strutting and the second arm of strutting that corresponds fold that can be better, and can guarantee first arm of strutting and the rigid connection of second arm of strutting simultaneously, thereby make first arm of strutting and the second arm of strutting can be better play the supporting role, messenger's centrum that can be fine resets.
Preferably, the first spreading arm and the second spreading arm are two pairs, and the two pairs of the first spreading arms
The arms and the two pairs of second spreading arms are respectively arranged at two sides of the push rod;
the opposite sides of the first opening plate and the second opening plate are respectively provided with a first placing groove, and when the first opening plate and the second opening plate are in a closed state, one end of the push rod, which is far away from the tail pushing mechanism, is placed in the two first placing grooves;
the first opening plate and the second opening plate are respectively positioned on two sides of the first placing groove, two second placing grooves are formed in the two sides of the first placing groove, the first opening arm is arranged in the second placing groove in the first opening plate when the first opening plate and the second opening plate are in a closed state, and the second opening arm is arranged in the second placing groove in the second opening plate.
In the technical scheme, the first spreading arm and the second spreading arm are arranged into two pairs, and the first arranging groove and the second arranging groove are formed in the first spreading plate and the second spreading plate respectively, so that when the folding is carried out, the parts, close to the first spreading plate and the second spreading plate, of the first spreading arm and the second spreading arm can be arranged in the second arranging groove in the first spreading plate or the second spreading plate respectively, and meanwhile, the push rod part connected with the first spreading arm and the second spreading arm is arranged in the first arranging groove in the first spreading plate and the second spreading plate respectively, so that the volume of the far end of the vertebral body spreading device when the folding is carried out is smaller, and the vertebral body spreading device can be better used as a test mold.
Preferably, the tail pushing mechanism comprises:
the tail seat is provided with an installation hole penetrating through the tail seat, one end of the tail seat is sleeved on one end, away from the first opening arm, of the core tube, the tail seat is provided with a limiting hole, and the tail seat is provided with an observation hole;
the rotating sleeve is arranged in the mounting hole, and a limiting groove is formed in the outer wall of the rotating sleeve;
one end of the indicating pin is fixed on the outer wall of the rotating sleeve, the other end of the indicating pin penetrates through the observation hole, and the other end of the indicating pin can move along the observation hole along the axial direction to form the indicating structure;
one end of the anti-rotation pin is in interference fit with the limiting hole, and the other end of the anti-rotation pin extends into the limiting groove;
the rotating shaft is rotatably inserted into one end, far away from the core pipe, of the mounting hole, and the rotating shaft located in the mounting hole is in threaded connection with the rotating sleeve.
Preferably, the rotating sleeve is provided with a first threaded hole and a second threaded hole, the first threaded hole is used for connecting one end, away from the first spreading arm, of the push rod, and the second threaded hole is used for connecting the rotating shaft.
Preferably, an annular groove is formed in the rotating shaft, a fixing hole is formed in the tailstock, the tailstock further comprises a limiting pin, one end of the limiting pin is in interference fit with the fixing hole, and the other end of the limiting pin penetrates through the fixing hole and extends into the annular groove.
In the technical scheme, the annular groove and the limiting pin are arranged, so that the rotating shaft can be better limited in the using process, the position of the rotating shaft can be well limited, and the rotating shaft can be well propped open or folded in the rotating process
Preferably, one end of the rotating shaft, which is far away from the tailstock, is of a cube structure;
and/or;
the outer wall of the tailstock is provided with a thread groove.
In this technical scheme, set the thread groove to the square mechanism simultaneously through the tail end with the rotation axis on the outer wall of tailstock to the rotatory rotation axis that the messenger can be better in the in-process of using, and guarantee at rotatory in-process, position change can not appear in other places, and the square structure on the rotation axis makes at the in-process of using, can rotate through torque wrench, thereby makes the in-process more laborsaving at the use.
Preferably, the handle further comprises:
the rubber coating sleeve is sleeved on a section of outer wall, close to the tail pushing mechanism, of the core pipe;
the handle sleeve is sleeved on the rubber coating sleeve to form the handle.
In this technical scheme, through setting up rubber coating cover and handle cover to the messenger when using, the operator can be better operate.
Compared with the prior art, the vertebral body spreader provided by the invention has the following beneficial effects:
1. the invention integrates the traditional spreader and the test model into a tool, only needs to insert the front end of the tool into the intervertebral, rotate the tail end of the tool, the front end of the tool is slowly spread, the centrum reduction condition is directly observed through C-arm perspective or open surgery, when the reduction is good, the intervertebral height displayed on the tool is read to obtain the specification of the fusion device implant, thereby greatly shortening the operation time and reducing the damage of vertebral plate tissues.
2. According to the invention, the meshing ends of the two first spreading arms are meshed with each other and the meshing ends of the two second spreading arms are meshed with each other by arranging the shape of the gear on the meshing ends of the first spreading arms and the second spreading arms, so that the two first spreading arms and the two second spreading arms can be more stably and parallelly spread when spreading the plate, the spreading plate cannot incline and cannot damage the vertebral body, and meanwhile, the size required for spreading the vertebral body can be accurately known, so that a more appropriate interbody fusion cage can be used.
3. The invention can not only make the opening parallel, but also make the whole volume smaller by arranging the gear mechanism, and simultaneously the second chute arranged on the first chute and the second chute arranged on the second opening arm arranged on the first opening arm and the first and the second placing grooves arranged on the opening plate can make the distal end of the vertebral body opener small in volume and the height is only 7mm in the closing state, thus the whole vertebral body opener can be matched with different interbody fusion cages. The minimum size of the vertebral body fusion cage can be tried, the minimum size of the vertebral body fusion cage can better perform the operation, and the applicability is stronger.
Drawings
The foregoing features, technical features, advantages and implementations of a vertebral body distractor will be further described in the following, in a clearly understood manner, with reference to the accompanying drawings, which illustrate preferred embodiments.
FIG. 1 is a schematic view of a structure according to the present invention;
FIG. 2 is a schematic view of another embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of the present invention shown in FIG. 2;
FIG. 4 is a schematic illustration of an exploded configuration of the distal portion of the present invention;
FIG. 5 is a partial cross-sectional structural schematic of the present invention;
FIG. 6 is a schematic view of the distal portion of the vertebral body cage of the present invention;
FIG. 7 is an exploded view of the distal portion of the vertebral body cage of the present invention;
fig. 8 is a schematic structural view of the first opening plate or the second opening plate of the present invention.
The reference numbers illustrate: 100. a core tube; 200. a push rod; 300. a tail pushing mechanism; 310. a tailstock; 311. mounting holes; 312. a thread groove; 320. a rotating sleeve; 321. a first threaded hole; 322. a second threaded hole; 330. an indicator pin; 340. an anti-rotation pin; 350. a rotating shaft; 360. a spacing pin; 400. a handle; 410. wrapping a rubber sleeve; 420. a handle cover; 510. a first spreader plate; 520. a second spreader plate; 530. a first placement groove; 540. a second placement groove; 600. a first spreader arm; 700. a second spreader arm;
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
In this context, it is to be understood that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.
In accordance with one embodiment of the present invention, there is provided, as shown in fig. 1-8, a vertebral body distractor comprising: the core tube 100, the push rod 200, the tail pushing mechanism 300, at least one pair of first opening arms 600 and one pair of second opening arms 700, and the first opening plates 510 and the second opening plates 520 which are oppositely arranged, wherein the push rod 200 is partially arranged in the core tube 100, and two ends of the push rod 200 are positioned outside the core tube 100; the tail pushing mechanism 300 is connected to one end of the core tube 100 and connected to the push rod 200, the tail pushing mechanism 300 is used for driving the push rod 200 to move axially along the core tube 100, and the tail pushing mechanism 300 is provided with an indicating structure for indicating the spreading height of the push rod 200 in the spreading process or the folding process; one ends of the two first spreading arms 600 are respectively and movably connected to the push rod 200 and the core tube 100, and one ends of the two second spreading arms 700 are respectively and movably connected to the push rod 200 and the core tube 100; the first spreading plates 510 are movably connected with the ends close to the two first spreading arms 600 respectively, the second spreading plates 520 are movably connected with the ends close to the two second spreading arms 700 respectively, and the ends close to the two first spreading arms 600 and the two second spreading arms 700 are matched with each other;
in specific implementation, the push rod 200 is inserted into the core tube 100, two ends of the push rod 200 are located outside the core tube 100, one end of the push rod 200 is used for connecting the first spreading arm 600 and the second spreading arm 700, the other end of the push rod 200 is used for connecting with the tail pushing mechanism 300, so that the tail pushing mechanism 300 can drive the push rod 200 to move along the axial direction of the core tube 100, a pin hole is formed in the side wall of one end of the push rod 200 away from the tail pushing mechanism 300 and is used for connecting one end of the first spreading arm 600 with one end of the second spreading arm 700 through a pin, a pin hole is also formed in the same end of the core tube 100 away from the tail pushing mechanism 300 and is used for connecting the other ends of the first spreading arm 600 and the second spreading arm 700, the other ends of the first spreading arm 600 or the second spreading arm 700 connected to the push rod 200 and the core tube 100 are movably connected to the first spreading plate 510 and the second spreading plate 520, and the ends of the two first spreading arms 600 close to each other end and the two second spreading arms 700 close to each other are mutually matched, in order to make the process of strutting, the one end that two first strutting arms 600 or two second strutting arms 700 are close to is the correlation all the time to make two first strutting arms 600 or two second strutting arms 700 can be better strut first distraction plate 510 and second distraction plate 520, in order to reach the purpose of steadily strutting.
In the open state, the tail pushing mechanism 300 drives the push rod 200 to move towards the direction close to the tail pushing mechanism 300, so that the push rod 200 drives the first spreading arm and the second spreading arm to simultaneously spread the first spreading plate 510 and the second spreading plate 520;
in the folding process, the rear pushing mechanism 300 drives the push rod 200 to move in the direction away from the rear pushing mechanism 300, so that the first spreading arm 600 and the second spreading arm 700 are folded and accommodated between the first spreading plate 510 and the second spreading plate 520.
In this embodiment, the specific structural form of the tail pushing mechanism 300 is not limited, and the specific form of the first spreading arm 600 or the second spreading arm 700 is also not limited, as long as the two ends of the first spreading arms 600 close to each other are respectively and movably connected to the first spreading plate 510, the ends of the second spreading arms 700 close to each other are respectively and movably connected to the second spreading plate 520, and the ends of the first spreading arms 600 close to each other and the ends of the second spreading arms 700 close to each other are matched with each other, so that the tail pushing mechanism can be more stable after being opened.
In another embodiment of the present invention, as shown in FIGS. 6-7, each of the first distraction arm 600 and the second distraction arm 700 has a hinged end and an engaging end, the engaging end having teeth; the hinged ends of the two first spreading arms 600 are respectively connected to the push rod 200 and the core tube 100, the meshed ends of the two first spreading arms 600 are respectively connected to the corresponding spreading plates, and the meshed ends of the two first spreading arms 600 are mutually meshed; the hinge ends of the two second spreading arms 700 are respectively connected to the push rod 200 and the core tube 100, the engaging ends of the two second spreading arms 700 are respectively connected to the corresponding spreading plates, and the engaging ends of the two first spreading arms 600 are engaged with each other.
In this embodiment, the first spreading arms 600 and the second spreading arms 700 are two pairs, the two pairs of first spreading arms 600 are respectively disposed on two sides of the push rod 200, and the two pairs of second spreading arms 700 are respectively disposed corresponding to the two pairs of first spreading arms 600 and also located on two sides of the push rod 200, and in this embodiment, the adjacent ends of the two first spreading arms 600 are provided with teeth and the adjacent ends of the two second spreading arms 700 are provided with teeth, so that the adjacent ends of the two first spreading arms 600 and the adjacent ends of the two second spreading arms 700 can be well matched with each other, in this embodiment, the two spreading arms connected to the push rod 200 can be integrally connected to the push rod 200, the same two first spreading arms 600 connected to the core tube 100 can also be integrally connected to the core tube 100, and the two pairs of second spreading arms 700 can also be disposed, which is not limited to the above two manners in this embodiment, other embodiments are also within the scope of the present disclosure, and are equally amenable to such use.
As shown in fig. 6-8, the opposite sides of the corresponding first opening plate 510 and the second opening plate 520 are respectively provided with a first placing groove 530, so that when the first opening plate 510 and the second opening plate 520 are in a closed state, one end of the push rod 200 far away from the tail pushing mechanism 300 is placed in the two first placing grooves 530;
in order to better fold the first opening plate 510 and the second opening plate 520, two second placing grooves 540 are respectively formed on the first opening plate 510 and the second opening plate 520 at two sides of the first placing groove 530, so that when the first opening plate 510 and the second opening plate 520 are folded, the first opening arm 600 is placed in the second placing groove 540 on the first opening plate 510, and the second opening arm 700 is placed in the second placing groove 540 on the second opening plate 520. The first and second disposition grooves 530 and 540 are respectively matched with the corresponding push rod 200 and the first and second spreading arms 600 and 700, so that when the folding mechanism is closed, the first and second spreading arms 600 and 700 can be better folded in the second disposition groove 540, and the push rod 200 is folded in the first disposition groove 530.
In another embodiment of the present invention, in order to make the volume of the distal end of the vertebral body distractor smaller, in practical implementation, a first matching position is provided on the first distraction arm 600, a second matching position corresponding to the first matching position is provided on the second distraction arm 700 corresponding to the position of the first distraction arm 600, so that the first distraction arm 600 and the second distraction arm 700 are integrated when they are folded, and the first matching position and the second matching position are designed such that the first distraction arm 600 and the second distraction arm 700 can complement each other when they are folded, so that the first distraction arm 600 and the corresponding second distraction arm 700 can form a complete rod-like structure when they are folded and can be folded in the second accommodation groove 540.
Specifically, a first inclined groove is formed on the first distraction arm 600 to form a first matching position, a second inclined groove complementary to the first distraction arm 600 is formed on the second distraction arm 700 hinged at the same position with the first distraction arm 600, to form a second mating position, when the first distraction arm 600 and the second distraction arm 700 are folded, the first distraction arm 600 and the second distraction arm 700 are mutually complemented and integrated, so that the folded first spreading arm 600 and the second spreading arm 700 can be well folded in the second placing groove 540, in this embodiment, the first inclined slot is formed on the first spreading arm 600, and the second inclined slot is formed on the second spreading arm 700, so that the volume can be smaller, meanwhile, the strength of the first spreading arm 600 or the second spreading arm 700 can be ensured, so that the first spreading arm 600 and the second spreading arm 700 can well support the first spreading plate 510 and the second spreading plate 520.
In another embodiment of the present invention, as shown in fig. 5, in order to better perform the propelling, the tail-pushing mechanism 300 comprises: the tail seat 310 is provided with a mounting hole 311 penetrating through the tail seat 310, one end of the tail seat 310 is sleeved on one end of the core tube 100 far away from the opening arm, the tail seat 310 is provided with a limiting hole, and the tail seat 310 is provided with an observation hole; the rotating sleeve 320 is arranged in the mounting hole 311, and the outer wall of the rotating sleeve 320 is provided with a limiting groove; one end of the indicating pin 330 is fixed on the outer wall of the rotating sleeve 320, the other end of the indicating pin 330 penetrates through the observation hole, and the other end of the indicating pin 330 can move along the observation hole along the axial direction; one end of the anti-rotation pin 340 is in interference fit with the limiting hole, and the other end of the anti-rotation pin 340 extends into the limiting groove; the rotation shaft 350 is rotatably inserted into one end of the mounting hole 311 away from the core pipe 100, and the rotation shaft 350 positioned in the mounting hole 311 is screw-coupled to the rotation sleeve 320.
Specifically, the rotating sleeve 320 is provided with a first threaded hole 321 and a second threaded hole 322, the first threaded hole 321 is used for connecting one end of the push rod 200 far from the spreading arm, the first threaded hole 321 is simply connected with the push rod 200, so that the rotating sleeve 320 can drive the push rod 200 to move, the second threaded hole 322 is used for connecting the rotating shaft 350, specifically, the rotating shaft 350 is in threaded connection with the second threaded hole 322, when the rotating shaft 350 rotates, the rotating sleeve 320 can drive the rotating sleeve 320 to move along the axial direction of the push rod 200 under the action of the anti-rotation pin 340, so as to drive the push rod 200 to move towards the spreading arm direction or towards the direction far from the spreading arm, so as to fold or spread the two spreading plates.
In order to when adjusting, can be better adjust, specifically, the ring channel has been seted up on the rotation axis 350, the fixed orifices has been seted up on the tailstock 310, the tailstock 310 still includes spacer pin 360, spacer pin 360's one end and fixed orifices interference fit, spacer pin 360's the other end runs through the fixed orifices and extends in the ring channel, spacer pin 360's effect is spacing to rotation axis 350, thereby make the rotation that rotation axis 350 can be better, and can not break away from the tailstock 310.
In another embodiment of the present invention, as shown in fig. 1-3, in order to facilitate better rotation during the operation, the end of the rotation shaft 350 away from the tailstock 310 is a cube structure. In the specific operation, the torque wrench is conveniently sleeved on the cube structure to adjust the rotation of the rotating shaft 350. In order to be well matched with the torque wrench, when the torque wrench is used, the outer wall of the tailstock 310 is provided with a threaded groove 312, so that the positioning rod is conveniently connected in the threaded groove 312 in the process of operation, the position of the tailstock 310 is conveniently fixed, the rotating shaft 350 can rotate better, and when the torque wrench is used, the threaded groove 312 and the positioning rod can be used by being separated from the torque wrench.
As shown in fig. 3, in order to perform an operation more preferably, the handle 400 includes: the tail pushing device comprises a rubber coating sleeve 410 and a handle sleeve 420, wherein the rubber coating sleeve 410 is sleeved on a section of the outer wall of the core pipe 100 close to the tail pushing mechanism 300; the handle sleeve 420 is sleeved on the rubber-covered sleeve 410 to form the handle 400, the handle sleeve 420 can be made of aluminum, phenolic cloth rod, silica gel and the like, and in specific implementation, the middle part of the handle sleeve 420 is slightly bulged to be held by an operator.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A vertebral body distractor, comprising:
a core tube;
the push rod is partially arranged in the core tube, and two ends of the push rod are positioned outside the core tube;
the tail pushing mechanism is connected to one end of the core tube and connected with the push rod, the tail pushing mechanism is used for driving the push rod to move axially along the core tube, and an indicating structure is arranged on the tail pushing mechanism and used for indicating the spreading height of the push rod in the spreading or folding process;
the device comprises at least one pair of first spreading arms and one pair of second spreading arms, wherein one ends of the two first spreading arms are respectively and movably connected to a push rod and a core tube, and one ends of the two second spreading arms are respectively and movably connected to the push rod and the core tube;
first opening plate and the second opening plate that sets up relatively, first opening plate and two first one end swing joint respectively that the arm is close to is propped open mutually to the second, the second is propped open plate and two the second props the arm and is close to one end swing joint respectively, and two first arm and two of propping open the second props the arm and all mutually supports mutually that the one end that the arm is close to mutually.
2. A vertebral body distractor according to claim 1, wherein:
the first spreading arm and the second spreading arm are both provided with a hinged end and an engaging end, and the engaging end is provided with teeth;
the hinged ends of the two first spreading arms are respectively connected to the push rod and the core tube, the meshing ends of the two first spreading arms are respectively connected to the corresponding spreading plates, and the meshing ends of the two first spreading arms are meshed with each other;
the hinged ends of the two second spreading arms are respectively connected to the push rod and the core pipe, the meshing ends of the two second spreading arms are respectively connected to the corresponding spreading plates, and the meshing ends of the two first spreading arms are meshed with each other.
3. A vertebral body distractor according to claim 1, wherein: the first opening arm is provided with a first matching position, and the second opening arm corresponding to the first opening arm is provided with a second matching position corresponding to the first matching position, so that the first opening arm and the second opening arm are integrated when being closed.
4. A vertebral body distractor according to claim 3, wherein: the first opening arm is provided with a first chute to form the first matching position, the second opening arm hinged at the same position with the first opening arm is provided with a second chute complementary with the first opening arm to form the second matching position, and the first opening arm and the second opening arm are matched with each other to form a whole when being closed.
5. A vertebral body distractor according to any one of claims 1-4, wherein:
the first spreading arms and the second spreading arms are two pairs, and the two pairs of the first spreading arms and the two pairs of the second spreading arms are respectively arranged on two sides of the push rod;
the opposite sides of the first opening plate and the second opening plate are respectively provided with a first placing groove, and when the first opening plate and the second opening plate are in a closed state, one end of the push rod, which is far away from the tail pushing mechanism, is placed in the two first placing grooves;
the first opening plate and the second opening plate are respectively positioned on two sides of the first placing groove, two second placing grooves are formed in the two sides of the first placing groove, the first opening arm is arranged in the second placing groove in the first opening plate when the first opening plate and the second opening plate are in a closed state, and the second opening arm is arranged in the second placing groove in the second opening plate.
6. The vertebral body distractor of claim 5, wherein: the tail pushes away the mechanism and includes:
the tail seat is provided with an installation hole penetrating through the tail seat, one end of the tail seat is sleeved on one end, away from the first opening arm, of the core tube, the tail seat is provided with a limiting hole, and the tail seat is provided with an observation hole;
the rotating sleeve is arranged in the mounting hole, and a limiting groove is formed in the outer wall of the rotating sleeve;
one end of the indicating pin is fixed on the outer wall of the rotating sleeve, the other end of the indicating pin penetrates through the observation hole, and the other end of the indicating pin can move along the observation hole along the axial direction to form the indicating structure;
one end of the anti-rotation pin is in interference fit with the limiting hole, and the other end of the anti-rotation pin extends into the limiting groove;
the rotating shaft is rotatably inserted into one end, far away from the core pipe, of the mounting hole, and the rotating shaft located in the mounting hole is in threaded connection with the rotating sleeve.
7. A vertebral body distractor according to claim 6, wherein: the rotating sleeve is provided with a first threaded hole and a second threaded hole, the first threaded hole is used for being connected with one end, away from the first spreading arm, of the push rod, and the second threaded hole is used for being connected with the rotating shaft.
8. The vertebral body distractor of claim 6, wherein: the rotating shaft is provided with an annular groove, the tailstock is provided with a fixing hole and further comprises a limiting pin, one end of the limiting pin is in interference fit with the fixing hole, and the other end of the limiting pin penetrates through the fixing hole and extends into the annular groove.
9. A vertebral body distractor according to any one of claims 6-8, wherein:
one end of the rotating shaft, which is far away from the tailstock, is of a cube structure;
and/or;
the outer wall of the tailstock is provided with a thread groove.
10. A vertebral body distractor according to claim 9, wherein: still include the handle, the handle includes:
the rubber coating sleeve is sleeved on one section of outer wall of the core pipe close to the tail pushing mechanism;
the handle sleeve is sleeved on the rubber coating sleeve to form the handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011208984.4A CN114431905A (en) | 2020-11-03 | 2020-11-03 | Vertebral body dilator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011208984.4A CN114431905A (en) | 2020-11-03 | 2020-11-03 | Vertebral body dilator |
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| Publication Number | Publication Date |
|---|---|
| CN114431905A true CN114431905A (en) | 2022-05-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011208984.4A Pending CN114431905A (en) | 2020-11-03 | 2020-11-03 | Vertebral body dilator |
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| CN (1) | CN114431905A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117796973A (en) * | 2024-03-01 | 2024-04-02 | 北京纳通医疗科技控股有限公司 | Display, holding implantation instrument for lumbar fusion device and surgical instrument assembly |
| CN117796973B (en) * | 2024-03-01 | 2024-05-31 | 北京纳通医疗科技控股有限公司 | Display, holding implantation instrument for lumbar fusion device and surgical instrument assembly |
-
2020
- 2020-11-03 CN CN202011208984.4A patent/CN114431905A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117796973A (en) * | 2024-03-01 | 2024-04-02 | 北京纳通医疗科技控股有限公司 | Display, holding implantation instrument for lumbar fusion device and surgical instrument assembly |
| CN117796973B (en) * | 2024-03-01 | 2024-05-31 | 北京纳通医疗科技控股有限公司 | Display, holding implantation instrument for lumbar fusion device and surgical instrument assembly |
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