CN113749750A - Minimally invasive distraction mold testing device adaptive to vertebral body - Google Patents
Minimally invasive distraction mold testing device adaptive to vertebral body Download PDFInfo
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- CN113749750A CN113749750A CN202110821313.3A CN202110821313A CN113749750A CN 113749750 A CN113749750 A CN 113749750A CN 202110821313 A CN202110821313 A CN 202110821313A CN 113749750 A CN113749750 A CN 113749750A
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- 238000012360 testing method Methods 0.000 title claims abstract description 16
- 230000003044 adaptive effect Effects 0.000 title claims description 11
- 230000003014 reinforcing effect Effects 0.000 claims description 20
- 230000005540 biological transmission Effects 0.000 claims description 19
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 230000002146 bilateral effect Effects 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 7
- 238000013461 design Methods 0.000 abstract description 5
- 230000004927 fusion Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000002324 minimally invasive surgery Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/88—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
- A61B17/8852—Tools for expanding or compacting bones or discs or cavities therein capable of being assembled or enlarged, or changing shape, inside the bone or disc
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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
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/06—Measuring instruments not otherwise provided for
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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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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/06—Measuring instruments not otherwise provided for
- A61B2090/062—Measuring instruments not otherwise provided for penetration depth
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Abstract
The invention provides a minimally invasive distraction model testing device of a self-adaptive vertebral body, which comprises a distraction unit at the far end and a control handle at the near end, wherein the distraction unit is arranged at the far end; the front supporting piece and the rear supporting piece in the supporting unit comprise supporting components consisting of a first supporting rod and a second supporting rod, one ends of the first supporting rod and the second supporting rod are hinged with each other, the other ends of the first supporting rod and the second supporting rod are hinged with the middle part of the supporting piece, and stepped grooves are formed in the opposite sides of the first supporting rod and the second supporting rod, so that the supporting components formed after the first supporting rod and the second supporting rod are hinged with each other are identical in overall width; one end of the rear supporting piece far away from the spreading piece, the through groove arranged at the near end of the middle rod and the far end of the pushing seat are hinged. According to the invention, through the design of the special-shaped supporting component, the supporting strength is obviously enhanced, and the left width and the right width are not increased; the upper and lower distraction pieces can be adaptively adjusted according to the actual angles of the end plates at two sides of the intervertebral space in the distraction process by the hinging design of the distraction pieces and the bracing component.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to a minimally invasive distraction model testing device adaptive to a vertebral body.
Background
In the course of minimally invasive spine surgery, a vertebral body distraction device is required to pre-distract or reposition the intervertebral space in many surgical procedures, such as spinal fusion, percutaneous vertebroplasty, percutaneous kyphoplasty, etc.
For this reason, a great deal of research on vertebral body distracters has been carried out by those skilled in the art, for example, patent CN202011166004.9 discloses a minimally invasive vertebral body distracter, which comprises a distraction device and a molding instrument for controlling the distraction device; the opening device comprises a fixed block, an opening block and a pushing block; the opposite surfaces of the fixed block and the propelling block are provided with limit blocks, the limiting blocks are used for realizing serial sliding limitation between the fixed block and the propelling block, and when the propelling block slides along the direction close to the fixed block, the propping block upwards and/or downwards props.
However, the above-mentioned vertebral body distractors have the following drawbacks:
(1) the angle between the upper and lower strutting blocks is fixed, when the vertebral body fusion operation is carried out, a patient lies on an operation bed, the vertebral body can not recover to an ideal physiological curvature due to the difference of the body type and the diseased condition of the patient, two sides of the intervertebral space are often not parallel and form a certain angle, the strutting devices with fixed angles can cause uneven stress between the intervertebral spaces with indefinite angles, and the vertebral end plate is extremely easy to damage at the position with large local stress due to limited bearing force of the vertebral end plate;
(2) the vertebral body distracter achieves the distraction purpose through the sliding blocks connected in series, the sliding blocks slide in the distraction process to convert the motion in the horizontal direction into the motion in the vertical direction, and the horizontal force is decomposed into the vertical force, namely the strong loss in the conversion process, so that the actual use is very laborious;
(3) the technical core of the vertebral body dilator is the sliding of the serial sliding blocks, when in minimally invasive surgery, tissues are easily embedded into the gaps of the sliding grooves through the working channel with the inner diameter of 7mm, the distraction of the instrument is blocked, and the use of the instrument fails;
(4) the vertebral body dilator has no function of trial model, namely the functions of measuring the distraction height of the vertebral body and the depth of inserting the vertebral body, and guides the subsequent operation process through measurement and confirmation in the operation.
Therefore, provide a centrum distraction device, it can adapt to the different angles in intervertebral space at the in-process of strutting, better laminating centrum endplate, stable in structure is reliable, and easy operation can provide the examination mould function, is a technical problem who awaits the solution urgently.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a minimally invasive distraction model testing device adaptive to a vertebral body.
A minimally invasive distraction model testing device of a self-adaptive vertebral body comprises a distraction unit at the far end and a control handle at the near end; wherein the content of the first and second substances,
the propping unit comprises a middle rod, a front supporting piece, a rear supporting piece, a propping piece and a pushing seat; the front supporting piece and the rear supporting piece comprise supporting components consisting of a first supporting rod and a second supporting rod, one ends of the first supporting rod and the second supporting rod are hinged with each other, the other ends of the first supporting rod and the second supporting rod are hinged with the middle part of the supporting piece, and stepped grooves are formed in the opposite sides of the first supporting rod and the second supporting rod, so that the supporting components formed after one ends of the first supporting rod and the second supporting rod are hinged are identical in overall width; one end of the rear supporting piece far away from the spreading piece, a through groove arranged at the near end of the middle rod and the far end of the pushing seat are hinged;
the control handle controls the pushing seat to slide towards the far end or the near end relative to the through groove, controls the opening and closing of the rear supporting piece, and realizes the opening or closing of the opening piece.
Preferably, the distal end of the middle rod is provided with a head, the head is a cone which gradually becomes larger from far to near, and the distal end surface of the cone is an arc surface; the middle part of the middle rod is provided with a cross seat, the far end surface of the cross seat extends out of the far end rod along the far end direction, the other end of the far end rod is fixed with the near end surface of the head, the near end surface of the cross seat extends out of the near end rod along the near end direction, and the near end rod is provided with the through groove.
Preferably, the spreading pieces comprise an upper spreading piece and a lower spreading piece which are identical in structure, the far ends of the spreading pieces bend to a certain radian in the direction close to the middle rod, the farthest ends of the upper spreading piece and the lower spreading piece are far away from the highest position of the head, and the minimum width of the farthest ends of the upper spreading piece and the lower spreading piece is smaller than the height of the highest position of the head.
Preferably, the middle part of the spreading piece is provided with a cross-shaped reinforcing seat, and the near end and the far end of the reinforcing seat respectively extend out of reinforcing ribs in the direction far away from the reinforcing seat; the far-end and the near-end of strengthening the seat are equipped with the hinge hole respectively, anterior support piece is articulated with the hinge hole of far-end, posterior support piece is articulated with the hinge hole of near-end.
Preferably, a developing groove is arranged on one side of the opening sheet contacting with the vertebral body end plate.
Preferably, in the middle of the cross seat, a reinforcing part extends out of the proximal end side and the distal end side of the part perpendicular to the axial direction respectively along the direction far away from the cross seat, and the reinforcing part is fixed with the left side and the right side of the proximal rod and the distal rod.
Preferably, after passing through the hinge joint formed by the proximal end of the rear support and the distal end of the pushing seat, a support rod passes through the through slot provided at the proximal end of the intermediate rod and passes through the hinge joint formed by the proximal end of the rear support and the distal end of the pushing seat on the other side of the intermediate rod.
Preferably, the control handle comprises an outer tube, a transmission tube and an operating assembly; the transmission pipe sleeve is arranged in the outer pipe, the far end of the outer pipe is fixedly connected with the near end of the middle rod, the far end of the transmission pipe is fixedly connected with the pushing seat, the operation assembly drives the transmission pipe to move axially relative to the outer pipe, and the transmission pipe drives the pushing seat to move axially relative to the middle rod.
Preferably, the operating assembly comprises a slider, a handle seat, a turning knob and a knob cover; the near-end of outer tube with the distal end fixed connection of handle seat, the near-end of driving tube with in the handle seat slider fixed connection, handle seat bilateral symmetry is equipped with the spout, two archs extend respectively to the both sides of slider, the arch passes the spout, realizes the slider with but handle seat circumference spacing axial sliding connection.
Preferably, the tail end of the handle seat is provided with an external thread which is matched with an internal thread of the rotating knob, the rotating knob and the knob cover are axially limited and circumferentially and rotatably fixed, and the protrusion of the sliding block penetrates through the sliding groove and then is clamped in a cavity formed after the rotating knob and the knob cover are assembled; scales are arranged on the handle seat and used for marking the displacement changes of the rotary knob and the rotary knob cover.
Compared with the prior art, the invention has the technical effects that:
(1) through the combined design of the first supporting rod and the second supporting rod which are shaped in a special way, the supporting strength is obviously enhanced, the supporting component provides stable supporting force to prop the upper and lower propping sheets open, the left and right width is not increased, the limited space of the head is utilized to the maximum extent, and the device can be used in minimally invasive surgery.
(2) Through the design that the front supporting piece and the rear supporting piece are hinged with the middle parts of the upper and lower distraction pieces, the upper and lower distraction pieces can be adaptively adjusted according to the actual angles of the end plates on two sides of the intervertebral space in the distraction process, and naturally fit with the end plates of the vertebral bodies, so that the end plates of the vertebral bodies are stressed uniformly in the distraction process, the damage of the end plates is effectively reduced, and the operation risk is reduced.
(3) The invention only has two layers of pipes, namely the outer pipe and the transmission pipe, and because the fixed outer diameter is required to be 7mm, under the limitation, the wall thickness of a single-layer pipe can be increased by fewer layers of pipes, the pipe fitting strength is improved, the device strength is increased, and the device stability is improved.
(4) The expansion unit is fixed at the far end of the outer tube, the farthest end of the expansion device is fixed, the distance of the far end is fixed, the excessive sliding of the expansion sheet during expansion is limited, and the operation safety is improved.
(5) The invention provides a specific control principle and a specific structure of the control handle, and the structure is simpler and more reliable.
(6) The upper and lower distraction pieces are provided with a plurality of groups of bracing components, so that the distraction purpose can be simply and effectively achieved, and meanwhile, strong distraction force is provided, and the vertebral body is easily distracted.
(7) The depth of the cone can be reflected by the arrangement of the developing tank, and the distraction height is measured by the scale on the handle seat, so the invention has the function of testing the mold.
Drawings
FIG. 1 is a schematic view of a distal end structure of a minimally invasive distraction model testing device of a self-adaptive vertebral body according to the present invention;
FIG. 2 is a schematic view of a first support bar according to the present invention;
FIG. 3 is a schematic view of a second support rod according to the present invention;
FIG. 4 is a schematic view of the construction of the intermediate bar according to the present invention;
FIG. 5 is a schematic view of the upper and lower spreader plates of the present invention;
FIG. 6 is a schematic view of a proximal end structure of the minimally invasive distraction model testing device of the self-adaptive vertebral body of the invention;
FIG. 7 is a cross-sectional view of the proximal structure of the minimally invasive distraction model testing device of the self-adaptive vertebral body in the invention;
FIG. 8 is a schematic view of the combination of the proximal end of the distractor assembly of the present invention with the outer tube and the distal end of the drive tube;
FIG. 9 is a combined cross-sectional view of the proximal end of the distractor assembly of the present invention with the distal ends of the outer tube and the drive tube;
the symbols in the drawings indicate the description:
1-distraction unit, 11-middle rod, 111-head, 112-cross seat, 113-through slot, 114-distal rod, 115-proximal rod, 116-reinforcement, 12-anterior support, 13-posterior support, 14-distraction piece, 141-upper distraction piece, 142-lower distraction piece, 143-reinforcement seat, 144-hinge hole, 146-reinforcement rib, 147-visualization slot, 15-thrust seat, 151-fixation hole, 16-strut, 17-support component, 171-first support, 172-second support, 173-first hinge hole, 174-second hinge hole,
2-control handle, 21-outer tube, 211-fixed groove, 22-transmission tube, 23-sliding block, 24-handle seat, 241-sliding groove, 242-external thread, 25-rotary knob, 251-internal thread and 26-rotary knob cover.
Detailed Description
In the following description, the proximal end refers to the end closer to the operator, and the distal end refers to the end farther from the operator. The axial direction is the direction that extends along the driving pipe axis, and circumference is the direction of rotation that uses driving pipe axis as the center of rotation. Left and right refer to the left and right of the operator's view.
The invention provides a minimally invasive distraction model testing device adaptive to a vertebral body, which comprises a distraction unit 1 at the far end and a control handle 2 at the near end as shown in figures 1 and 6. Referring to fig. 1, the expanding unit 1 includes an intermediate bar 11, a front support 12, a rear support 13, an expanding sheet 14, and a pushing seat 15.
Specifically, referring to fig. 1, the front support 12 and the rear support 13 each include two sets of support assemblies 17. The supporting component 17 comprises a first supporting rod 171 and a second supporting rod 172, wherein one end of each of the first supporting rod 171 and the second supporting rod 172 is hinged, the first supporting rod 171 and the second supporting rod 172 are in mirror symmetry, and a stepped groove is formed in one side, opposite to the first supporting rod 171 and the second supporting rod 172, of each of the first supporting rod 171 and the second supporting rod 172, so that the whole width of the supporting component 17 formed after one end of each of the first supporting rod 171 and the second supporting rod 172 is hinged is the same. The first and second support rods 171 and 172 have first and second hinge holes 173 and 174 at their respective ends, the first hinge holes 173 of the first and second support rods 171 and 172 are hinged to each other, and the second hinge hole 174 at the other end is hinged to the distal hinge hole 144 at the middle of the upper and lower struts 141 and 142 or hinged to the proximal hinge hole 145 at the middle of the upper and lower struts 141 and 142.
Further, the two second hinge holes 174 of the supporting member 17 included in the front supporting member 12 are respectively hinged to the hinge holes 144 at the distal ends of the middle portions of the upper and lower spreading pieces 141 and 142, and the two second hinge holes 174 of the supporting member 17 included in the rear supporting member 13 are respectively hinged to the hinge holes 144 at the proximal ends of the middle portions of the upper and lower spreading pieces 141 and 142. Wherein, the first hinge hole 173 of the support assembly 17 in the rear support 13, the through slot 113 disposed at the proximal end of the middle rod 11 are hinged with the fixing hole 151 at the distal end of the pushing seat 15, and the proximal ends of the pushing seat 15 and the rear support 13 can slide axially along the through slot 113.
In a preferred embodiment, the strut 16 passes through the hinge point formed by the first hinge hole 173 of the support assembly 17 of the rear support 13 and the fixing hole 151 at the distal end of the pushing seat 15, passes through the through slot 113 provided at the proximal end of the middle rod 11, and passes through the hinge point of the rear support 13 at the other side of the middle rod 11 and the pushing seat 15, and the strength of the hinge point is ensured when the pushing seat 15 moves relative to the middle rod 11 by the arrangement of the strut 16.
In a specific embodiment of the present invention, referring to fig. 4, a head 111 is disposed at a distal end of the middle rod 11, the head 111 is a cone gradually increasing from a distal end to a proximal end, a distal surface of the cone is an arc surface, a cross seat 112 matching with the reinforcing seat 143 is disposed at a middle portion of the middle rod 11, the distal surface of the cross seat 112 extends out of the distal end rod 114 along the distal direction, the other end of the distal end rod 114 is fixed with a proximal surface of the head 11, the proximal surface of the cross seat 112 extends out of a proximal rod 115 along the proximal direction, the other end of the proximal rod 115 is inserted into a fixing groove 211 at the distal end of the outer tube 21, and the proximal rod 115 is provided with a through groove 113.
Further, in the middle of the cross seat 112, the proximal end side and the distal end side of the portion perpendicular to the axial direction extend out of the reinforcement portion 116 in the direction away from the cross seat 112, respectively, and the reinforcement portion 116 is fixed to the left and right sides of the proximal rod 115 and the distal rod 114, thereby increasing the overall strength of the intermediate rod 11.
In a specific embodiment of the present invention, the spreading sheet 14 includes an upper spreading sheet 141 and a lower spreading sheet 142 having the same structure, as shown in fig. 5, a cross-shaped reinforcing seat 143 is disposed in the middle of the spreading sheet 14, reinforcing ribs 146 extend from the proximal end and the distal end of the reinforcing seat 143 in a direction away from the reinforcing seat 143, hinge holes 144 are disposed at the distal end and the proximal end of the reinforcing seat 143, the front supporting member 12 is hinged to the distal hinge hole 144, and the rear supporting member 13 is hinged to the proximal hinge hole 144.
Further, the distal end of the spreader piece 14 is curved toward the side where the reinforcing rib 146 is provided, that is, toward the intermediate lever 11. Further, as shown in fig. 1, the farthest ends of the upper and lower spreading pieces 141 and 142 that are close to the head 111 of the middle rod 11 are farther than the highest position of the head 111, and the smallest width of the farthest ends of the upper and lower spreading pieces 141 and 142 is smaller than the height of the highest position of the head 111. Through the above design, when the upper and lower spreading pieces 141 and 142 are in a closed state, the head 111 can prevent tissue fragments from being stuck into the front gap to make the head 111 in a sealed state.
Specifically, referring to fig. 6, the control handle 2 includes an outer tube 21, a transmission tube 22, a slider 23, a handle holder 24, a turning knob 25, and a knob cover 26. Wherein the handle seat 24, the turning knob 25 and the knob cover 26 constitute an operating assembly.
In a specific embodiment of the present invention, the driving tube 22 is sleeved in the outer tube 21, the distal end of the outer tube 21 is fixedly connected to the proximal end of the middle rod 11, the distal end of the driving tube 22 is fixedly connected to the pushing seat 15, the operating component drives the driving tube 22 to move axially relative to the outer tube, and the driving tube 22 drives the pushing seat 15 to move axially relative to the middle rod 11.
Further, referring to fig. 8, the proximal end of the middle rod 11 is inserted into the fixing groove 211 at the distal end of the outer tube 21, the through hole between the proximal end of the middle rod 11 and the distal end of the outer tube 21, the distal middle portion of the driving tube 22 is slotted and then passes through the through hole to be fixedly connected with the pushing seat 15, and the driving tube 22 drives the pushing seat 15 to move axially relative to the outer tube 21 and the middle rod 11.
Referring to fig. 7, the proximal end of the outer tube 21 is fixedly connected to the distal end of the handle seat 24, the proximal end of the transmission tube 22 is fixedly connected to the slider 23, the slider 23 is located in the handle seat 24, sliding grooves 241 are symmetrically formed in two sides of the handle seat 24, two protrusions extend from two sides of the slider 23 respectively, the two protrusions penetrate through the sliding grooves 241, so that the slider 23 is axially slidably connected to the handle seat 24 in a circumferential limiting manner, an external thread 242 is formed at the tail end of the handle seat 241, the external thread 242 is matched with an internal thread 251 of the rotation knob 25, the rotation knob 25 is axially, radially, rotatably and fixedly connected to the knob cover 26 in a limiting manner, and the protrusions of the slider 23 penetrate through the sliding grooves 241 and are then clamped in a cavity formed after the rotation knob 25 and the knob cover 26 are assembled (a cavity formed by the distal end of the rotation knob 25 and the distal end of the knob cover 26).
In a preferred embodiment, as shown in fig. 1, a circular arc-shaped developing groove 147 is provided on the side of the distraction sheet 14 contacting with the vertebral endplate for developing, during the operation, the X-ray irradiates the contact surface of the distraction sheet 14 and the vertebral endplate, the developing groove 147 develops, the distance of the developing groove 147 is known, and the depth of the vertebral body is deduced by the relative position of the developing groove 147 and the vertebral body. As shown in fig. 7, the handle seat 24 is provided with scales for marking the displacement changes of the rotary knob 25 and the knob cover 26, and deducing the distraction height of the distraction piece 14, so as to achieve the purpose of measuring the distraction height of the vertebral body. In conclusion, the depth of the cone can be reflected by the arrangement of the developing tank, the distraction height can be measured by the scale on the handle seat, and the device has the function of testing the mold.
The minimally invasive distraction model testing device of the self-adaptive vertebral body provided by the invention has the following specific operation steps:
step S1: the rotating knob 25 is rotated in the forward direction, the internal thread 251 of the rotating knob 25 is matched with the external thread 242 of the handle seat 24, so that the rotating knob 25 rotates towards the far end, the sliding block 23 is pushed to move towards the far end, the sliding block 23 drives the transmission tube 22 fixed with the sliding block 23 to move towards the far end, the transmission tube 22 pushes the pushing seat 15 fixed with the transmission tube 22 to move towards the far end, the pushing seat 15 pushes the near end of the rear support piece 13 to move towards the far end, all the support components 17 are unfolded, and the unfolding of the upper unfolding sheet 141 and the lower unfolding sheet 142 is realized.
Step S2: the rotating knob 25 is rotated reversely, the internal thread 251 of the rotating knob 25 is matched with the external thread 242 of the handle seat 24, so that the rotating knob 25 carries the knob cover 26 fixed with the rotating knob 25 to rotate towards the near end, the knob cover 26 pulls the slide block 23 to move towards the near end, the slide block 23 carries the transmission tube 22 fixed with the slide block 23 to move towards the near end, the transmission tube 22 pushes the pushing seat 15 fixed with the transmission tube 23 to move towards the near end, the pushing seat 15 pulls the near end of the rear supporting piece 13 to move towards the near end, all the supporting components 17 are closed, and the closing of the upper opening piece 141 and the lower opening piece 142 is realized.
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 distraction model test device of a self-adaptive vertebral body is characterized by comprising a distraction unit (1) at the far end and a control handle (2) at the near end; wherein the content of the first and second substances,
the opening unit (1) comprises a middle rod (11), a front supporting piece (12), a rear supporting piece (13), an opening sheet (14) and a pushing seat (15); the front support (12) and the rear support (13) comprise a support assembly (17) consisting of a first support rod (171) and a second support rod (172), one ends of the first support rod (171) and the second support rod (172) are hinged with each other, the other ends of the first support rod (171) and the second support rod (172) are hinged with the middle part of the opening piece (14), and a stepped groove is formed in the opposite side of the first support rod (171) and the second support rod (172), so that the overall widths of the support assemblies (17) formed after the first support rod (171) and the second support rod (172) are hinged are the same; one end of the rear supporting piece (13) far away from the opening piece (14), a through groove (113) arranged at the near end of the middle rod (11) and the far end of the pushing seat (15) are hinged;
the control handle (2) controls the opening and closing of the rear supporting piece (13) by controlling the pushing seat (15) to slide towards the far end or the near end relative to the through groove (113), so that the opening or closing of the opening sheet (14) is realized.
2. The minimally invasive distraction model test device of the self-adaptive vertebral body according to claim 1, wherein a head (111) is arranged at the distal end of the middle rod (11), the head (111) is a cone gradually enlarged from far to near, and the distal end surface of the cone is an arc surface; the middle part of middle pole (11) is equipped with cross seat (112), the distal end face of cross seat (112) extends distal end pole (114) along distal end direction, the other end of distal end pole (114) with the near end face of head (11) is fixed, the near end face of cross seat (112) extends near end pole (115) along the near end direction, near end pole (115) are equipped with logical groove (113).
3. The minimally invasive distraction trial device of the adaptive vertebral body according to claim 2, wherein the distraction piece (14) comprises an upper distraction piece (141) and a lower distraction piece (142) which have the same structure, the distal end of the distraction piece (14) is bent to a certain radian in a direction close to the middle rod (11), the most distal ends of the upper distraction piece (141) and the lower distraction piece (142) are far away from the highest position of the head (111), and the minimum width of the most distal ends of the upper distraction piece (141) and the lower distraction piece (142) is smaller than the height of the highest position of the head (111).
4. The minimally invasive distraction trial device of the adaptive vertebral body according to claim 1, wherein a cross-shaped reinforcing seat (143) is arranged in the middle of the distraction piece (14), and reinforcing ribs (146) extend from the proximal end and the distal end of the reinforcing seat (143) respectively in the direction away from the reinforcing seat (143); the far end and the near end of the reinforcing seat (143) are respectively provided with a hinge hole (144), the front support (12) is hinged with the hinge hole (144) at the far end, and the rear support (13) is hinged with the hinge hole (144) at the near end.
5. The minimally invasive distraction trial device according to claim 1, wherein a developing groove (147) is formed on the side of the distraction sheet (14) contacting with the vertebral end plate.
6. The minimally invasive distraction trial device of the adaptive vertebral body according to claim 2, wherein in the middle of the cross-shaped seat (112), a proximal side and a distal side of a part perpendicular to the axial direction respectively extend out of a reinforcing part (116) along a direction away from the cross-shaped seat (112), and the reinforcing part (116) is fixed with the left side and the right side of the proximal rod (115) and the distal rod (114).
7. The minimally invasive distraction trial device of the adaptive vertebral body according to claim 2, wherein a strut (16) passes through a hinge portion formed by the proximal end of the rear support (13) and the distal end of the propulsion seat (15), then passes through the through slot (113) provided at the proximal end of the intermediate rod (11), and passes through a hinge portion formed by the proximal end of the rear support (13) and the distal end of the propulsion seat (15) at the other side of the intermediate rod (11).
8. The minimally invasive distraction trial device of the adaptive vertebral body according to claim 1, wherein the control handle (2) comprises an outer tube (21), a transmission tube (22) and an operating assembly; the transmission pipe (22) cover is located in outer tube (21), the distal end of outer tube (21) and the near-end fixed connection of intermediate lever (11), the distal end of transmission pipe (22) with impel seat (15) fixed connection, operating element drives transmission pipe (22) are for the outer tube along axial motion, transmission pipe (22) drive impel seat (15) for intermediate lever (11) are along axial motion.
9. The minimally invasive distraction trial device of the adaptive vertebral body according to claim 8, wherein the operating assembly comprises a slider (23), a handle seat (24), a rotation knob (25) and a knob cover (26); the near-end of outer tube with the distal end fixed connection of handle seat (24), the near-end of driving tube (22) with in handle seat (24) slider (23) fixed connection, handle seat (24) bilateral symmetry is equipped with spout (241), two archs extend respectively to the both sides of slider (23), the arch passes spout (241), realizes slider (23) with the spacing axial sliding connection of handle seat (24) circumference.
10. The minimally invasive distraction model test device of the self-adaptive vertebral body according to claim 9, wherein the tail end of the handle seat (241) is provided with an external thread (242) which is matched with an internal thread (251) of the rotation knob (25), the rotation knob (25) and the knob cover (26) are axially limited and circumferentially and rotatably fixed, and a protrusion of the sliding block (23) penetrates through the sliding groove (241) and then is clamped in a cavity formed after the rotation knob (25) and the knob cover (26) are assembled; scales are arranged on the handle seat (24) and used for marking the displacement changes of the rotary knob (25) and the knob cover (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110821313.3A CN113749750A (en) | 2021-07-20 | 2021-07-20 | Minimally invasive distraction mold testing device adaptive to vertebral body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110821313.3A CN113749750A (en) | 2021-07-20 | 2021-07-20 | Minimally invasive distraction mold testing device adaptive to vertebral body |
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| CN113749750A true CN113749750A (en) | 2021-12-07 |
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| CN202110821313.3A Pending CN113749750A (en) | 2021-07-20 | 2021-07-20 | Minimally invasive distraction mold testing device adaptive to vertebral body |
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| US20030236520A1 (en) * | 2002-06-25 | 2003-12-25 | Roy Lim | Minimally invasive expanding spacer and method |
| US20050182416A1 (en) * | 2004-02-13 | 2005-08-18 | Roy Lim | Spacer with height and angle adjustments for spacing vertebral members |
| US20070260315A1 (en) * | 2006-05-03 | 2007-11-08 | Foley Kevin T | Devices and methods for disc height restoration |
| CN106725640A (en) * | 2017-01-24 | 2017-05-31 | 南京法迈特科技发展有限公司 | Can storage type surface mucous biopsy forceps through scope |
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