CN111493952A - Intervertebral body strutting assembly and intervertebral body strutting device - Google Patents
Intervertebral body strutting assembly and intervertebral body strutting device Download PDFInfo
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- CN111493952A CN111493952A CN202010479100.2A CN202010479100A CN111493952A CN 111493952 A CN111493952 A CN 111493952A CN 202010479100 A CN202010479100 A CN 202010479100A CN 111493952 A CN111493952 A CN 111493952A
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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
- 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 discloses an interbody distraction assembly and an interbody distractor. This subassembly struts between centrum is including strutting the sleeve, first end is fixed and is strutting the first arm that struts the sleeve first end, strut the arm with the first second that struts the arm relative setting, first end and the first piece that struts the arm second end and be connected, strut the piece with the first second that struts the piece relative setting and run through and strut the sleeve and with strut sleeve sliding fit's internal piece that struts, strut the internal piece and strut the inboard butt of arm with the first inboard and the second of arm that struts. During the use, prop open the piece with the first piece and the second that prop open that the inside wall laminated and arrange intervertebral space in, to the direction promotion that is close to first piece and the second piece that props open and prop open internals, make first arm and the second that struts open the arm and strut gradually, and then first piece and the second that struts prop open and prop open the clearance between the piece grow gradually and lie in the prescribed limit, realize "small volume inserts, the opening action that the big volume struts", thereby avoid the injury to the centrum.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to an interbody distraction assembly and an interbody distractor.
Background
By intervertebral space is meant the space between two adjacent vertebral bodies, where the intervertebral disc is located. When the intervertebral space is narrowed, not only the spinal cord and the spinal nerve roots are compressed or stimulated, but also the height and stability of the vertebral body are damaged, and a discectomy is generally performed in order to relieve the pain of a patient and reconstruct the height and stability of the vertebral body.
The narrow intervertebral space needs to be expanded during the menstruation operation, which is beneficial to the recovery of normal vertebral body arrangement and the relaxation of tension ligaments, thereby achieving the purpose of reducing the compression or stimulation to spinal cords and spinal nerve roots; meanwhile, the opened intervertebral space exposes out the operation space, so that the interbody fusion cage is implanted smoothly, and the implanted interbody fusion cage adjusts the narrow intervertebral space to a reasonable range, thereby reconstructing the height and the stability of the vertebral body.
The existing instrument for distracting the intervertebral space is simple and crude, a plurality of doctors can generally directly use the test model of the intervertebral fusion device as the vertebral body distracter, the vertebral body can be injured under many conditions by the method, potential safety hazards exist, and the simple vertebral body distracter can not enter the intervertebral space and can not distract the intervertebral space for patients with serious narrow intervertebral space.
Therefore, how to design an auxiliary medical instrument which can safely and stably prop open the intervertebral space on the premise of not damaging the vertebral body is a technical problem which needs to be solved by technical personnel in the field at present.
Disclosure of Invention
In view of the above, the present invention provides a distraction assembly capable of safely and stably distracting the intervertebral space without damaging the vertebral body;
another object of the present invention is to provide an interbody distractor.
In order to achieve the purpose, the invention provides the following technical scheme:
an interbody distraction assembly comprising:
opening the sleeve;
the first end of the first distraction arm is fixed at the first end of the distraction sleeve;
the first end of the second distraction arm is fixed at the first end of the distraction sleeve;
the first end of the first opening sheet is connected with the second end of the first opening arm, and the second end of the first opening sheet is suspended in the air;
the first end of the first spreading piece is connected with the first end of the first spreading arm, the second end of the first spreading piece is suspended, and a spreading gap is formed between the inner side wall of the first spreading piece and the inner side wall of the first spreading piece;
the distraction inner part penetrates through the distraction sleeve and is in sliding fit with the distraction sleeve, and the distraction inner part is abutted against the inner sides of the first distraction arm and the second distraction arm; when the internal expanding piece moves towards the direction close to the first expanding piece and the second expanding piece, the expanding gap gradually increases; when the opening internal piece moves towards the direction far away from the first opening piece and the second opening piece, the opening gap gradually becomes smaller.
Preferably, in the distraction assembly, the distraction sleeve has a through hole, and the distraction inner piece is disposed through the through hole and is in sliding fit with the through hole.
Preferably, in the distraction assembly, the distraction inner piece comprises a straight rod and a sliding block fixedly connected with the straight rod;
the straight rod penetrates through the through hole, and the length of the straight rod is greater than that of the through hole; the slider is located first arm of strutting with the second struts between the arm, and with the inboard of first arm of strutting with the inboard butt of second arm of strutting.
Preferably, in the aforementioned distracting assembly, the slider is a streamlined shuttle slider.
Preferably, in the distraction assembly, the sliding block includes an expansion section and a contraction section, wherein a distance between two surfaces of the expansion section, which are matched with the inner side of the first distraction arm and the inner side of the second distraction arm, gradually decreases along the direction from the distraction inner member to the position close to the first distraction piece and the second distraction piece; the distance between the two surfaces of the contraction section, which are matched with the inner side of the first opening arm and the inner side of the second opening arm, is gradually increased.
Preferably, in the distraction assembly, the sliding block further comprises a transition section, and the transition section connects the expansion section and the contraction section.
Preferably, in the distraction assembly, a first clamping table is arranged at one end of the outer side wall of the first distraction piece, which is close to the first distraction arm, and a second clamping table is arranged at one end of the outer side wall of the second distraction piece, which is close to the second distraction arm;
the outer side wall of the first clamping table is higher than the outer side wall of the first spreading piece, and the outer side wall of the second clamping table is higher than the outer side wall of the second spreading piece.
The utility model provides an interbody distractor, includes control assembly and above-mentioned subassembly that struts, control assembly can promote strut interior spare of subassembly and to being close to and keeping away from strut the subassembly first piece that struts and strut the direction removal of piece of subassembly second.
Preferably, in the intervertebral body distractor, the control assembly comprises a first forceps body and a second forceps body, the middle parts of which are hinged with each other and are in a scissors shape, and a first end of the first forceps body is rotatably connected with the distraction sleeve of the distraction assembly; the first end of the second forceps body is rotatably connected with one end, exposed out of the second end of the distraction sleeve, of the distraction inner part of the distraction assembly.
Preferably, in the above-described interbody distractor, the control assembly is rotatably connected to the distraction sleeve via a base slide mount.
Preferably, in the above-mentioned intervertebral distractor, the base sliding seat includes a sliding seat main body and a guide groove, and a first end of the sliding seat main body is fixed to an outer periphery of the distraction sleeve; the guide groove is arranged on the periphery of the sliding seat main body and extends along the axial direction of the sliding seat main body; the first end of the first clamp body is rotatably connected with the sliding seat main body; the first end of the second forceps body penetrates through the guide groove and is rotatably connected with one end, exposed out of the second end of the distraction sleeve, of the distraction inner part.
Preferably, in the above-described intervertebral distractor, the base sliding seat further comprises a sliding weight fixed to the second end of the sliding seat body.
Preferably, in the intervertebral body distractor, a groove is arranged on the periphery of the sliding seat body matched with the first end of the first forceps body; and the groove is provided with a blind hole matched with the first end of the first clamp body.
Preferably, in the intervertebral body distractor, the sliding seat body has a hollow cylindrical structure.
Preferably, in the distractor between vertebral bodies, the first forceps body and the second forceps body are respectively provided with a first forceps handle and a second forceps handle, the outer wall of the first forceps handle is provided with a first clamping protrusion, and the outer wall of the second forceps handle is provided with a second clamping protrusion.
Preferably, in the intervertebral distractor, a first mounting head is arranged at a first end of the first forceps body, and a second mounting head is arranged at a first end of the second forceps body;
the first mounting head is a U-shaped part provided with cylindrical protrusions on two side walls, and the second mounting head is a U-shaped part provided with rotating holes on two side walls.
Preferably, in the above-mentioned intervertebral body distractor, a first side of the first mounting head is provided with a third locking protrusion.
According to the technical scheme, when the distraction assembly is used, the first distraction piece and the second distraction piece which are attached to the inner side wall are placed in an intervertebral space, the distraction internal piece is pushed in the direction close to the first distraction piece and the second distraction piece, the distraction internal piece pushes the first distraction arm and the second distraction arm to be gradually distracted, the distraction gap between the first distraction piece and the second distraction piece is gradually enlarged until the distraction intervertebral space reaches a specified range, and the operation is convenient to carry out; after the operation is finished, the internal part is propped open by pushing in the direction away from the first propping piece and the second propping piece, the internal part is propped open by pushing the first propping arm and the second propping arm to be gradually closed, and the propping gap between the first propping piece and the second propping piece is gradually reduced so as to conveniently take out the intervertebral space from the propping assembly. Therefore, the distraction component realizes the distraction actions of small-volume insertion and large-volume distraction, thereby avoiding the injury to the vertebral body.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of an interbody distraction assembly according to embodiments of the invention;
fig. 2 is a schematic structural view of an interbody spacer assembly provided by an embodiment of the present invention, when no spacer is installed;
fig. 3 is a schematic structural view of a distraction inner member of an interbody distraction assembly according to an embodiment of the present invention;
fig. 4 is an enlarged, partial, schematic view of an interbody distraction assembly according to an embodiment of the invention;
FIG. 5 is a schematic structural view of an interbody distractor according to an embodiment of the present invention;
FIG. 6 is a schematic view of an embodiment of the distractor for distracting a vertebral body according to the present invention;
FIG. 7 is a schematic structural view of a control assembly of the interbody distractor according to the present invention;
fig. 8 is a schematic structural view of an interbody spacer closed according to an embodiment of the present invention.
Wherein: 100 is an expansion component, 101 is an expansion sleeve, 1011 is a through hole, 102 is an expansion inner part, 103 is a first expansion arm, 1031 is a first expansion region, 1032 is a first transition region, 1033 is a first contraction region, 104 is a second expansion arm, 1041 is a second expansion region, 1042 is a second transition region, 1043 is a second contraction region, 105 is a first expansion sheet, 106 is a second expansion sheet, 1021 is a straight rod, 1022 is a sliding block, 1022-a is an expansion section, 1022-b is a contraction section, 1022-c is a transition section, 1023 is a connecting hole, 1051 is a first clamping table, 1061 is a second clamping table, 200 is a control component, 201 is a first clamp body, 202 is a second clamp body, 203 is a base sliding seat, 2031 is a sliding seat body, 2032 is a guide groove, 2031-a is a groove, 2031-a1 is a blind hole, 3 is a sliding hammer, 2011-a is a cylindrical convex part, 2021 is a second mounting head, 2021-a is a rotation hole, 2012 is a first clamp handle, 2022 is a second clamp handle, 2012-a is a first clamp protrusion, 2022-a is a second clamp protrusion.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 8, an intervertebral body expanding assembly 100 according to an embodiment of the present invention includes:
the sleeve 101 is expanded;
a first spreader arm 103, a first end of the first spreader arm 103 being fixed to a first end of the spreader sleeve 101;
a second distraction arm 104 arranged opposite to the first distraction arm 103, wherein a first end of the second distraction arm 104 is fixed to a first end of the distraction sleeve 101;
a first spreading piece 105, a first end of the first spreading piece 105 is connected with a second end of the first spreading arm 103, and the second end of the first spreading piece 105 is suspended;
a second spreading sheet 106 arranged opposite to the first spreading sheet 105, wherein a first end of the second spreading sheet 106 is connected with a second end of the second spreading arm 104, a second end of the second spreading sheet 106 is suspended, and a spreading gap is formed between the inner side wall of the first spreading sheet 105 and the inner side wall of the second spreading sheet 106;
the internal expanding member 102 penetrates through the expanding sleeve 101 and is in sliding fit with the expanding sleeve 101, and the internal expanding member 102 is abutted against the inner sides of the first expanding arm 103 and the second expanding arm 104; when the internal expanding piece 102 moves towards the direction close to the first expanding piece 105 and the second expanding piece 106, the expanding gap gradually increases; as the distraction inner 102 moves away from the first distraction piece 105 and the second distraction piece 106, the distraction gap gradually decreases.
When the distraction assembly 100 is used, firstly, the first distraction piece 105 and the second distraction piece 106 which are attached to the inner side wall are placed in the intervertebral space, so that the distraction inner piece 102 slides towards the direction close to the first distraction piece 105 and the second distraction piece 106 along the distraction sleeve 101, the distraction inner piece 102 further pushes the first distraction arm 103 and the second distraction arm 104 to be gradually distracted, the distraction gap between the first distraction piece 105 and the second distraction piece 106 is gradually enlarged until the intervertebral space is distracted to a specified range, and the operation is convenient to carry out; after the operation is finished, the internal member 102 is pushed to the direction far away from the first opening sheet 105 and the second opening sheet 106, the internal member 102 is pushed to push the first opening arm 103 and the second opening arm 104 to be gradually closed, the opening gap between the first opening sheet 105 and the second opening sheet 106 is gradually reduced, so that the opening assembly 100 can be conveniently taken out of the intervertebral space, and the whole opening action realizes the purposes of small volume insertion and large volume opening, thereby avoiding the injury to the vertebral body.
It should be noted that there are various connection manners for achieving the sliding fit between the distraction sleeve 101 and the distraction inner member 102, such as through a through hole, a sliding guide, a sliding bracket, a sliding groove, etc., and the connection manner for achieving the sliding fit between the distraction sleeve 101 and the distraction inner member 102 is within the protection scope of the present invention.
In addition, the sliding fit between the distraction sleeve 101 and the distraction inner member 102 can be realized by providing a separate connecting member, or by providing a through hole, a sliding groove, or the like directly on the distraction sleeve 101, as long as the sliding fit between the distraction sleeve 101 and the distraction inner member 102 can be realized.
As shown in fig. 1 and fig. 2, in the present embodiment, a through hole 1011 is directly formed in the distraction sleeve 101, and the distraction inner member 102 is disposed through the through hole 1011 and is in sliding fit with the through hole 1011, so that the distraction inner member 102 moves toward and away from the first distraction piece 105 and the second distraction piece 106 by sliding, and the distraction gap is adjusted, thereby achieving the purpose of distracting the intervertebral space.
As shown in fig. 2 and 3, the internal expanding member 102 includes a straight rod 1021 and a sliding block 1022 fixedly connected to the straight rod 1021;
the straight rod 1021 penetrates through the through hole 1011, the length of the straight rod 1021 is larger than that of the through hole 1011, the situation that the intervertebral space cannot be expanded due to too short sliding distance or the expanded intervertebral space is too small to smoothly implant the implant fusion device when the expansion internal part 102 moves towards the direction close to the first expansion piece 105 and the second expansion piece 106 is avoided, and meanwhile, the situation that the sliding block 1022 and the first end of the expansion sleeve 101 collide due to too short sliding distance when the expansion internal part 102 moves towards the direction far away from the first expansion piece 105 and the second expansion piece 106 is avoided;
the slider 1022 is located between the first spreading arm 103 and the second spreading arm 104, and abuts against the inner side of the first spreading arm 103 and the inner side of the second spreading arm 104, so that when the spreading inner member 102 slides, the slider 1022 can spread the first spreading arm 103 and the second spreading arm 104 abutting against the slider 1022, and the spreading gap is increased or decreased.
As shown in fig. 3, the sliding block 1022 provided in the embodiment of the present invention is a streamlined fusiform sliding block, so as to realize that the distraction gap is uniformly enlarged when the distraction inner member 102 moves towards the direction close to the first distraction piece 105 and the second distraction piece 106, so that the distraction assembly 100 safely and stably distracts the vertebral body without damaging the vertebral body, and the distraction gap is uniformly reduced when the distraction inner member 102 moves towards the direction away from the first distraction piece 105 and the second distraction piece 106, so that the distraction assembly 100 is safely and stably taken out from the vertebral body gap without damaging the vertebral body.
Further, the sliding block 1022 includes an expanding section 1022-a and a contracting section 1022-b, wherein, along the direction that the internal expanding member 102 is close to the first expanding piece 105 and the second expanding piece 106, the distance between two surfaces of the expanding section 1022-a, which are matched with the inner side of the first expanding arm 103 and the inner side of the second expanding arm 104, is gradually reduced, so that the expanding gap is increased when the internal expanding member 102 moves towards the direction close to the first expanding piece 105 and the second expanding piece 106, and the expanding gap is reduced when the internal expanding member 102 moves towards the direction away from the first expanding piece 105 and the second expanding piece 106; the distance between the two surfaces of the contracting section 1022-b, which are matched with the inner side of the first opening arm 103 and the inner side of the second opening arm 104, gradually increases, so that when the opening inner member 102 moves towards and away from the first opening piece 105 and the second opening piece 106, the friction between the inner sides of the first opening arm 103 and the second opening arm 104 and the sliding block 1022 is avoided, and the opening assembly 100 cannot be safely and stably opened or taken out.
In addition, the sliding block 1022 provided by the embodiment of the present invention further includes a transition section 1022-c, the transition section 1022-c connects the expanding section 1022-a and the contracting section 1022-b, and the distance between two surfaces of the transition section 1022-c, which are matched with the inner side of the first distraction arm 103 and the inner side of the second distraction arm 104, is constant along the direction of the internal distraction member 102 to approach the first distraction piece 105 and the second distraction piece 106, so that the internal distraction member 102 can stably maintain the expanded state after expanding the first distraction piece 105 and the second distraction piece 106, thereby facilitating the subsequent operation.
It should be noted that, as shown in fig. 2, the first spreading arm 103 has a first expansion region 1031, a first contraction region 1033 and a first transition region 1032, the second spreading arm 104 has a second expansion region 1041, a second contraction region 1043 and a second transition region 1042, an inner sidewall of the first expansion region 1031 is disposed opposite to an inner sidewall of the second expansion region 1041, an inner sidewall of the first contraction region 1033 is disposed opposite to an inner sidewall of the second contraction region 1043, and an inner sidewall of the first transition region 1032 is disposed opposite to an inner sidewall of the second transition region 1042; along strutting interior spare 102 to being close to first distraction piece 105 and second distraction piece 106 direction, the distance between first expansion zone 1031 inside wall and the second expansion zone 1041 inside wall diminishes gradually, the distance between first transition zone 1032 inside wall and the second transition zone 1042 inside wall is unchangeable, the distance between first constriction zone 1033 inside wall and the second constriction zone 1043 inside wall grows gradually to when strutting interior spare 102 and moving to being close to first distraction piece 105 and second distraction piece 106 direction, it struts to strut that interior spare 102 can be stable promotion first distraction arm 103 and second distraction arm 104.
As shown in fig. 4, in the embodiment of the present invention, a first locking platform 1051 is disposed at one end of the outer sidewall of the first spreading piece 105 close to the first spreading arm 103, and a second locking platform 1061 is disposed at one end of the outer sidewall of the second spreading piece 106 close to the second spreading arm 104;
the outer side wall of the first clamping platform 1051 is higher than the outer side wall of the first distraction piece 105, the outer side wall of the second clamping platform 1061 is higher than the outer side wall of the second distraction piece 106, and the first clamping platform 1051 and the second clamping platform 1061 are clamped on the vertebral body when the intervertebral space is distracted in the operation, so that the function of indicating the position and limiting the depth is achieved.
As shown in fig. 5 and 6, the present invention provides an intervertebral distractor, which has a control assembly 200 and the distraction assembly 100, wherein the control assembly 200 can push the internal distraction member 102 of the distraction assembly 100 to move toward and away from the first distraction plate 105 of the distraction assembly 100 and the second distraction plate 106 of the distraction assembly 100.
The control assembly 200 is used to push the internal expanding member 102 of the expanding assembly 100 to slide towards the direction close to the first expanding piece 105 of the expanding assembly 100 and the second expanding piece 106 of the expanding assembly 100, so that the internal expanding member 102 of the expanding assembly 100 pushes the first expanding arm 103 of the expanding assembly 100 and the second expanding arm 104 of the expanding assembly 100 to expand gradually, the first expanding arm 103 of the expanding assembly 100 drives the first expanding piece 105 of the expanding assembly 100 to expand towards the outer wall direction, and the second expanding arm 104 of the expanding assembly 100 drives the second expanding piece 106 of the expanding assembly 100 to expand towards the outer wall direction, thereby realizing the expanding action of 'volume insertion and volume expansion', and achieving the purposes of no damage to vertebral bodies, safety and stability in expanding.
As shown in fig. 7, the control assembly 200 includes a first forceps body 201 and a second forceps body 202, which are hinged to each other at the middle and have a scissors shape, and a first end of the first forceps body 201 is rotatably connected to the distraction sleeve 101 of the distraction assembly 100; the first end of the second forceps body 202 is rotatably connected to the end of the internal distraction member 102 of the distraction assembly 100, which is exposed from the second end of the distraction sleeve 101, so that the first end of the second forceps body 202 can drive the internal distraction member 102 to move.
When the interbody distractor provided by the embodiment of the invention is used, the first forceps body 201 and the second forceps body 202 are grasped, so that the first forceps body 201 and the second forceps body 202 rotate relatively, when the distance between the first end of the first forceps body 201 and the first end of the second forceps body 202 is reduced, the first end of the second forceps body 202 drives the internal distraction member 102 to move in the direction close to the first distraction piece 105 and the second distraction piece 106 along the axial direction of the distraction sleeve 101, so that the internal distraction member 102 pushes the first distraction arm 103 and the second distraction arm 104 to be distracted, the first distraction arm 103 drives the first distraction piece 105 to expand in the direction of the outer sidewall, and the second distraction arm 104 drives the second distraction piece 106 to expand in the direction of the outer sidewall, so that distraction action is realized; when the distance between the first end of the first forceps body 201 and the first end of the second forceps body 202 is increased, the first end of the second forceps body 202 drives the internal expanding member 102 to move in the direction away from the first expanding piece 105 and the second expanding piece 106 along the axial direction of the expanding sleeve 101, so that the internal expanding member 102 pushes the first expanding arm 103 and the second expanding arm 104 to be closed, the first expanding arm 103 drives the first expanding piece 105 to be closed in the direction of the inner side wall, and meanwhile, the second expanding arm 104 drives the second expanding piece 106 to be closed in the direction of the inner side wall, thereby realizing the closing action.
As shown in fig. 8, the base sliding seat 203 includes a sliding seat body 2031 and a guide groove 2032, and a first end of the sliding seat body 2031 is fixed to the outer circumference of the spreader sleeve 101; the guide groove 2032 is provided on the outer circumference of the sliding seat body 2031 and extends in the axial direction of the sliding seat body 2031.
Further, the sliding seat body 2031 is a hollow cylinder structure, so that the weight of the distractor between the vertebral bodies can be reduced, and the doctor can easily grasp the distractor. Specifically, the sliding seat body 2031 is provided with four guide grooves 2032, and each two guide grooves 2032 are disposed opposite to each other.
It should be noted that the hollowed-out shape on the cylinder may be rectangular, elliptical, etc., as long as the hollowed-out shape can reduce the weight of the distractor between vertebrae without affecting the use strength of the distractor between vertebrae.
In addition, the base sliding seat 203 further includes a sliding weight 2033, and the sliding weight 2033 is fixed at the second end of the sliding seat body 2031, so that the doctor in the operation can beat the sliding weight 2033 to force and displace the distractor between the vertebral bodies.
As shown in fig. 6, the control assembly 200 is rotatably coupled to the distraction sleeve 101, either directly or indirectly, such as via a base slide mount 203 to the distraction sleeve 101 when indirectly coupled.
Further, the first end of the first caliper body 201 is rotatably connected to the sliding seat main body 2031; the end of the internal expanding member 102, which is exposed out of the second end of the expanding sleeve 101, is provided with a connecting hole 1023, the first end of the second forceps body 202 passes through the guide groove 2032 and is rotatably connected with the connecting hole 1023 on the internal expanding member 102, so that the first end of the second forceps body 202 can reciprocate in the guide groove 2032 along the axial direction of the sliding seat main body 2031, and the internal expanding member 102 is driven to reciprocate along the axial direction of the sliding seat main body 2031, and then the internal expanding member 102 pushes the first expanding arm 103 and the second expanding arm 104 to expand.
The first end of the first forceps body 201 can be rotatably connected to the sliding seat main body 2031 in various ways, such as hinged connection, shaft connection, spherical pair connection, etc.; the second jaw body 202 can be rotatably connected to the inner support member 102 in a variety of ways, such as hinged, journaled, spherical pair connection, etc.
In addition, the first end of the first caliper body 201 may be directly rotatably connected to the sliding seat body 2031, or a connecting member may be additionally provided to rotatably connect the first end of the first caliper body 201 to the sliding seat body 2031, as long as the first end of the first caliper body 201 can be rotatably connected to the sliding seat body 2031; the second caliper body 202 may be directly rotatably connected to the support inner member 102, or a connecting member may be additionally provided to rotatably connect the second caliper body 202 to the support inner member 102, as long as the rotatable connection between the second caliper body 202 and the support inner member 102 is achieved.
As shown in fig. 7, the embodiment of the present invention discloses a specific manner of rotatable connection. A first mounting head 2011 is arranged at the first end of the first clamp body 201, and a second mounting head 2021 is arranged at the first end of the second clamp body 202;
the first mounting head 2011 is a U-shaped member with cylindrical protrusions 2011-b on two side walls, the second mounting head 2021 is a U-shaped member with rotating holes 2021-a on two side walls, and during mounting, the rotating holes 2021-a on the second mounting head 2021 and the connecting holes 1023 on the distraction inner member 102 are connected by a pin, so that the first end of the second forceps body 202 is rotatably connected with the end of the distraction inner member 102 exposed out of the second end of the distraction sleeve 101.
As shown in fig. 2, a groove 2031-a is formed on the outer circumference of the sliding seat body 2031, which is matched with the first end of the first forceps body 201, for matching with two sidewalls of the first mounting head 2011 of the first forceps body 201; the groove 2031-a is provided with blind holes 2031-a1 which are matched with cylindrical protrusions 2011-b on two side walls of a first mounting head 2011 of the first caliper body 201, and the cylindrical protrusions 2011-b on two side walls of the first mounting head 2011 are mounted in the blind holes 2031-a1 on the groove 2031-a, so that the first end of the first caliper body 201 can be rotatably connected with the sliding seat body 2031, the substrate sliding seat 203 can be rotatably connected with the distraction sleeve 101, and the control component 200 can be rotatably connected with the distraction sleeve 101.
Further, the first forceps body 201 and the second forceps body 202 provided by the embodiment of the invention respectively have a first forceps handle 2012 and a second forceps handle 2022, the outer wall of the first forceps handle 2012 is provided with a first clamping protrusion 2012-a, and the outer wall of the second forceps handle 2022 is provided with a second clamping protrusion 2022-a, so that a doctor can easily grip the intervertebral distractor.
In addition, the first side of the first mounting head 2011 provided by the embodiment of the invention is provided with the third clamping protrusion 2011-a, so that a doctor is not easy to slip when taking out the interbody distractor from the vertebral bodies of a patient.
The terms "first" and "second," and the like in the description and claims of the present invention and the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not set forth for a listed step or element but may include steps or elements not listed.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (17)
1. An interbody distraction assembly (100), comprising:
an expansion sleeve (101);
a first distraction arm (103), a first end of the first distraction arm (103) being fixed to a first end of the distraction sleeve (101);
a second distraction arm (104) arranged opposite to the first distraction arm (103), wherein a first end of the second distraction arm (104) is fixed at a first end of the distraction sleeve (101);
a first spreading sheet (105), a first end of the first spreading sheet (105) being connected to a second end of the first spreading arm (103), a second end of the first spreading sheet (105) being in the air;
a second spreading piece (106) arranged opposite to the first spreading piece (105), wherein a first end of the second spreading piece (106) is connected with a second end of the second spreading arm (104), a second end of the second spreading piece (106) is suspended, and a spreading gap is formed between the inner side wall of the first spreading piece (105) and the inner side wall of the second spreading piece (106);
an internal expanding member (102) which penetrates through the expanding sleeve (101) and is in sliding fit with the expanding sleeve (101), wherein the internal expanding member (102) is abutted against the inner side of the first expanding arm (103) and the inner side of the second expanding arm (104); when the expanding inner piece (102) moves towards the direction close to the first expanding sheet (105) and the second expanding sheet (106), the expanding gap gradually becomes larger; when the opening internal piece (102) moves towards the direction far away from the first opening sheet (105) and the second opening sheet (106), the opening gap gradually becomes smaller.
2. The spreader assembly (100) of claim 1, wherein the spreader sleeve (101) has a through-hole (1011), and the spreader inner (102) is disposed through the through-hole (1011) and slidably engages the through-hole (1011).
3. The distractor assembly (100) of claim 2 wherein the distractor inner member (102) comprises a straight rod (1021) and a slide (1022) fixedly attached to the straight rod (1021);
the straight rod (1021) penetrates through the through hole (1011), and the length of the straight rod (1021) is greater than that of the through hole (1011); the slider (1022) is located between the first spreading arm (103) and the second spreading arm (104), and abuts against the inner side of the first spreading arm (103) and the inner side of the second spreading arm (104).
4. The distractor assembly (100) of claim 3, wherein the slide block (1022) is a streamlined shuttle-shaped slide block.
5. The distraction assembly (100) of claim 4, wherein the slider (1022) comprises an expansion section (1022-a) and a contraction section (1022-b), wherein the distance between two mating faces of the expansion section (1022-a) and the inner side of the first distraction arm (103) and the inner side of the second distraction arm (104) becomes gradually smaller along the distraction inner member (102) toward the first distraction piece (105) and the second distraction piece (106); the distance between two surfaces of the contraction section (1022-b) matched with the inner side of the first distraction arm (103) and the inner side of the second distraction arm (104) is gradually increased.
6. The distractor assembly (100) of claim 5, wherein the slide block (1022) further comprises a transition section (1022-c), the transition section (1022-c) connecting the expanding section (1022-a) and the contracting section (1022-b).
7. The distraction assembly (100) of claim 1, wherein an end of the outer sidewall of the first distraction tab (105) proximal to the first distraction arm (103) is provided with a first catch (1051), and an end of the outer sidewall of the second distraction tab (106) proximal to the second distraction arm (104) is provided with a second catch (1061);
the outer side wall of the first clamping table (1051) is higher than the outer side wall of the first opening sheet (105), and the outer side wall of the second clamping table (1061) is higher than the outer side wall of the second opening sheet (106).
8. An interbody distractor comprising a control assembly (200) and the distraction assembly (100) of any of claims 1-7, the control assembly (200) being capable of urging the internal distraction member (102) of the distraction assembly (100) to move toward and away from the first distraction piece (105) of the distraction assembly (100) and the second distraction piece (106) of the distraction assembly (100).
9. The interbody distractor of claim 8, wherein the control assembly (200) comprises a first jaw body (201) and a second jaw body (202) hinged to each other at their middle portions and having a scissors-like shape, wherein a first end of the first jaw body (201) is rotatably connected to the distraction sleeve (101) of the distraction assembly (100); the first end of the second forceps body (202) is rotatably connected with one end, exposed out of the second end of the distraction sleeve (101), of the distraction inner piece (102) of the distraction assembly (100).
10. An interbody distractor according to claim 9, wherein the control assembly (200) is rotatably coupled to the distraction sleeve (101) by a base slide block (203).
11. An interbody distractor according to claim 10, wherein the base sliding seat (203) comprises a sliding seat body (2031) and a guide groove (2032), a first end of the sliding seat body (2031) being fixed to an outer circumference of the distraction sleeve (101); the guide groove (2032) is arranged on the outer periphery of the sliding seat main body (2031) and extends in the axial direction of the sliding seat main body (2031); the first end of the first clamp body (201) is rotatably connected with the sliding seat main body (2031); the first end of the second forceps body (202) penetrates through the guide groove (2032) and is rotatably connected with one end of the internal distraction piece (102) exposed out of the second end of the distraction sleeve (101).
12. An interbody distractor as claimed in claim 11, wherein the base slide shoe (203) further comprises a slide hammer (2033), the slide hammer (2033) being secured to a second end of the slide shoe body (2031).
13. An interbody distractor according to claim 12, wherein the sliding seat body (2031) has a recess (2031-a) around its periphery for mating with the first end of the first forceps body (201); the groove (2031-a) is provided with a blind hole (2031-a1) matched with the first end of the first clamp body (201).
14. The intervertebral distractor of claim 13 wherein the sliding seat body (2031) is a hollowed out cylindrical structure.
15. The interbody distractor of claim 11, wherein the first and second clamp bodies (201, 202) have first and second clamp handles (2012, 2022), respectively, an outer wall of the first clamp handle (2012) being provided with a first clamping protrusion (2012-a), and an outer wall of the second clamp handle (2022) being provided with a second clamping protrusion (2022-a).
16. An interbody distractor as claimed in claim 15, wherein the first end of the first jaw (201) is provided with a first mounting head (2011), and the first end of the second jaw (202) is provided with a second mounting head (2021);
the first mounting head (2011) is a U-shaped part provided with cylindrical bosses (2011-b) on two side walls, and the second mounting head (2021) is a U-shaped part provided with rotating holes (2021-a) on two side walls.
17. An interbody distractor as claimed in claim 16, wherein the first mounting head (2011) is provided with a third detent (2011-a) on a first side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010479100.2A CN111493952A (en) | 2020-05-29 | 2020-05-29 | Intervertebral body strutting assembly and intervertebral body strutting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010479100.2A CN111493952A (en) | 2020-05-29 | 2020-05-29 | Intervertebral body strutting assembly and intervertebral body strutting device |
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| Publication Number | Publication Date |
|---|---|
| CN111493952A true CN111493952A (en) | 2020-08-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010479100.2A Pending CN111493952A (en) | 2020-05-29 | 2020-05-29 | Intervertebral body strutting assembly and intervertebral body strutting device |
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| Country | Link |
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| CN (1) | CN111493952A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115054350A (en) * | 2022-06-23 | 2022-09-16 | 中国人民解放军总医院第四医学中心 | Intravertebral opening restorer |
| CN116687633A (en) * | 2023-08-02 | 2023-09-05 | 北京爱康宜诚医疗器材有限公司 | Prosthetic implant device |
| WO2023245876A1 (en) * | 2022-06-23 | 2023-12-28 | 中国人民解放军总医院第四医学中心 | Intravertebral opening restorer |
-
2020
- 2020-05-29 CN CN202010479100.2A patent/CN111493952A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115054350A (en) * | 2022-06-23 | 2022-09-16 | 中国人民解放军总医院第四医学中心 | Intravertebral opening restorer |
| WO2023245876A1 (en) * | 2022-06-23 | 2023-12-28 | 中国人民解放军总医院第四医学中心 | Intravertebral opening restorer |
| CN116687633A (en) * | 2023-08-02 | 2023-09-05 | 北京爱康宜诚医疗器材有限公司 | Prosthetic implant device |
| CN116687633B (en) * | 2023-08-02 | 2023-10-27 | 北京爱康宜诚医疗器材有限公司 | Prosthetic implant device |
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