CN109431557B - Medical intervertebral distractor with adjustable distraction height - Google Patents

Abstract

Translated fromChinese

本发明公开了一种撑开高度可调的医疗用椎间撑开器，包括撑开体和推动体，撑开体包括依次连接的椭圆锥台和椭圆柱体，撑开体等分为上半体a和下半体b，上半体a和下半体b上均包括依次连接的半椭圆锥台c和半椭圆柱体d，在半椭圆柱体d上设置有斜孔；推动体包括依次连接的契合块和拉动杆，契合块包括中间块a以及两个均与中间块a连接的斜条b，中间块a上远离契合块内侧的一端与拉动杆的一端连接，斜条b分别各插入一个斜孔中；在上半体a和下半体b的彼此相对面上分别设置有导向轴和导向孔，导向孔与导向轴配合。本发明所设计的椎间撑开器，仅操作方便，通过简单的拉动即实现了高度调整，提高了椎间撑开器使用的便利性。

The invention discloses a medical intervertebral spreader with adjustable spreading height, comprising a spreading body and a pushing body, the spreading body comprises an elliptical cone frustum and an elliptical cylinder connected in sequence, and the spreading body is divided into upper The half body a and the lower half body b, the upper half body a and the lower half body b include a semi-elliptical cone c and a semi-elliptical cylinder d which are connected in sequence, and an inclined hole is arranged on the semi-elliptical cylinder d; It includes a fitting block and a pulling rod connected in sequence. The fitting block includes a middle block a and two oblique bars b both connected with the middle block a. The end of the middle block a away from the inner side of the fitting block is connected with one end of the pulling rod, and the diagonal bar b They are respectively inserted into an inclined hole; guide shafts and guide holes are respectively provided on the opposite surfaces of the upper half body a and the lower half body b, and the guide holes are matched with the guide shafts. The intervertebral spacer designed by the invention is only convenient to operate, and the height adjustment can be realized by simply pulling, which improves the convenience of using the intervertebral spacer.

Description

Medical intervertebral distractor with adjustable distraction height

Technical Field

The invention relates to the field of medical machinery, in particular to a medical intervertebral spreader with adjustable spreading height.

Background

Lumbar spondylolisthesis and degenerative lumbar lateral curvature are common lumbar diseases. Severe lumbar spondylolisthesis, degenerative lumbar lateral curvature, etc. are accompanied by extreme narrowing of the intervertebral space on one or both sides, and during the treatment, the narrow intervertebral space needs to be enlarged. At present, intervertebral distraction devices are lacked in the medical industry, so that the distraction operation of narrow cone gaps is very difficult. Therefore, there is a need for an intervertebral distractor kit that facilitates distraction of narrow intervertebral spaces.

The prior art CN204169915U discloses an intervertebral spreader kit, which needs to be embedded into the body in place, and the spreading height is not adjustable. Prior art CN206761749U discloses an intervertebral spreader, its height of strutting is adjustable, but need set up earlier and have a certain height the breach, put into the breach with it again, then constantly rotate the thread bush, because the mode of strutting through the rotation, when bare-handed rotation, need very big torsion, can't realize the thread bush smoothly and twist reverse, and when adopting external tools such as pliers, because the wound of opening on the human body is difficult too big, consequently also can't use tools such as pliers to twist reverse the thread bush.

Disclosure of Invention

The invention aims to: the medical intervertebral spreader with adjustable spreading height is provided, one or more defects of the existing intervertebral spreader are overcome, and the convenience in use of the intervertebral spreader is improved.

The technical scheme adopted by the invention is as follows:

the medical intervertebral distractor with the adjustable distraction height comprises a distraction body and a pushing body, wherein the distraction body comprises an elliptical cone table and an elliptical cylinder which are sequentially connected and share the same axis, the large end face of the elliptical cone table is connected with the end face of the elliptical cylinder, the distraction body is equally divided into an upper half body a and a lower half body b along a plane passing through the axis of the distraction body, the upper half body a and the lower half body b respectively comprise a semi-elliptical cone table c and a semi-elliptical cylinder d which are sequentially connected, inclined holes are respectively arranged on one side of the semi-elliptical cylinder d far away from the semi-elliptical cone table c, and the distance between the axes of the inclined holes gradually increases along the axis of the distraction body along with the approaching of the semi-elliptical cone table c;

the pushing body comprises a conjunction block and a pulling rod which are sequentially connected, the conjunction block is a V-shaped block and comprises a middle block a and two oblique strips b which are connected with the middle block a, the distance between the oblique strips b is gradually increased along with the distance from the middle block a, one end of the middle block a, which is far away from the inner side of the conjunction block, is connected with one end of the pulling rod, the axis of the pulling rod is parallel to the axis of the strutting body, the oblique strips b are respectively inserted into one oblique hole, and the cross section size of each oblique hole is consistent with that of the oblique strips b;

and the mutually opposite surfaces of the upper half body a and the lower half body b are respectively provided with a guide shaft and a guide hole, the guide hole is matched with the guide shaft, and the axes of the guide shaft and the guide hole are vertical to the plane.

The operation method of the invention comprises the following steps:

step A: according to the existing operating method: firstly, a small opening is opened on the intervertebral disc by a osteotome, and then the reamer is used for hollowing out the inner wall of the intervertebral disc;

and B: along a channel generated by a small opening, the small-diameter end of the elliptic cone of the distraction body is placed into the intervertebral disc, and the radius of the short axis in the cross section of the elliptic cone is parallel to the spine;

and C: and then fixing the lower half body b by hands or other machines, and pulling the pulling rod to enable the upper half body a of the spreading body to be far away from the lower half body b along the axis of the guide shaft to reach the required supporting height, so that the whole operation process is finished.

In the step C, the lower half body b is fixed, and when the pulling rod moves along the axis in the direction away from the spreading body, the upper half body b gradually moves in the direction away from the lower half body b along with the movement of the slanted bar b under the matching action of the slanted hole and the slanted surface of the slanted bar b and the limiting and guiding action of the guiding shaft, so that the height adjustment of the spreading body is completed, and the required supporting height is achieved.

The intervertebral spreader designed by the invention is convenient to operate, the height adjustment can be realized by simple pulling, the convenience of use of the intervertebral spreader is improved, the labor intensity of medical workers is reduced, and smooth operation is facilitated.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

1. the medical intervertebral spreader with adjustable spreading height is convenient to operate, the height can be adjusted by simply pulling, the convenience in use of the intervertebral spreader is improved, the labor intensity of medical workers is reduced, and smooth operation is facilitated;

2. the medical intervertebral spreader with adjustable spreading height is provided with the limiting strips and the baffle plates to control the maximum moving distance of the pulling rod in the axial direction and further prevent the guide shaft from falling out of the guide hole

Drawings

The invention will now be described, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a top view of the present invention;

FIG. 4 is a cross-sectional view taken along A-A in FIG. 3;

FIG. 5 is a schematic structural view of the pulling rod after being pulled;

FIG. 6 is a front view of FIG. 5;

FIG. 7 is a cross-sectional view of FIG. 5;

FIG. 8 is a schematic structural view of the distractor;

FIG. 9 is a schematic structural view of a pushing body;

FIG. 10 is a schematic structural view of the upper half;

FIG. 11 is a cross-sectional view of FIG. 10;

FIG. 12 is a view from another perspective of FIG. 10;

FIG. 13 is a schematic structural view of the lower half;

reference numerals in the drawings indicate:

1-opening body, 1 a-upper half body, 1 b-lower half body, 1 c-semi-elliptic cone table, 1 d-semi-elliptic cylinder, 2-pushing body, 3-conjunction block, 3 a-middle block, 3 b-oblique strip, 4-pulling rod, 5-guiding shaft, 6-guiding hole, 7-holding rod, 8-supporting shaft, 9-limiting strip, 10-baffle, 11-handle rod, 12-cross rod and 13-oblique hole.

Detailed Description

All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.

The present invention will be described in detail with reference to fig. 1 to 13.

Example 1

As shown in fig. 1-13, the medical intervertebral distractor with adjustable distraction height of the invention comprises adistraction body 1 and a pushingbody 2, wherein thedistraction body 1 comprises an elliptic cone frustum and an elliptic cylinder which are sequentially connected and coaxial, the large end surface of the elliptic cone frustum is connected with the end surface of the elliptic cylinder, thedistraction body 1 is equally divided into an upper half body 1a and alower half body 1b along a plane passing through the axial line of thedistraction body 1, the upper half body 1a and thelower half body 1b both comprise asemi-elliptic cone frustum 1c and asemi-elliptic cylinder 1d which are sequentially connected, aninclined hole 13 is respectively arranged on one side of thesemi-elliptic cylinder 1d far away from thesemi-elliptic cone frustum 1c, and the distance between the axial lines of theinclined holes 13 gradually increases along the axial line of thedistraction body 1 along the axial line approaching to thesemi-elliptic cone frustum 1 c;

the pushingbody 2 comprises aconjunction block 3 and apulling rod 4 which are sequentially connected, theconjunction block 3 is a V-shaped block and comprises amiddle block 3a and twooblique strips 3b which are connected with themiddle block 3a, the distance between theoblique strips 3b is gradually increased along with the distance from themiddle block 3a, one end of themiddle block 3a, which is far away from the inner side of theconjunction block 3, is connected with one end of thepulling rod 4, the axis of thepulling rod 4 is parallel to the axis of thestrutting body 1, theoblique strips 3b are respectively inserted into oneoblique hole 13, and the cross section size of eachoblique hole 13 is consistent with the cross section size of theoblique strip 3 b;

aguide shaft 5 and aguide hole 6 are respectively arranged on the mutually opposite surfaces of the upper half body 1a and thelower half body 1b, theguide hole 6 is matched with theguide shaft 5, and the axes of theguide shaft 5 and theguide hole 6 are vertical to the plane.

The working process of the invention is as follows:

step A: according to the existing operating method: firstly, a small opening is opened on the intervertebral disc by a osteotome, and then the reamer is used for hollowing out the inner wall of the intervertebral disc;

and B: along a channel generated by a small opening, the small-diameter end of the elliptic cone frustum of thedistraction body 1 is placed into the intervertebral disc, and the radius of the short axis in the cross section of the elliptic cone frustum is parallel to the spine;

and C: then thelower half body 1b is fixed by hands or other machines, and thepulling rod 4 is pulled to enable the upper half body 1a of theopening body 1 to be far away from thelower half body 1b along the axis of theguide shaft 5 to reach the required supporting height, and the whole operation process is finished.

In the step C, thelower half body 1b is fixed, when thepulling rod 4 moves along the axis in the direction away from thespreader 1, under the cooperation of the inclined surfaces of theinclined hole 13 and theinclined strip 3b and the limiting and guiding action of the guidingshaft 5, theupper half body 1b gradually moves in the direction away from thelower half body 1b along with the movement of theinclined strip 3b, so that the height adjustment of thespreader 1 is completed, and the required supporting height is achieved.

The intervertebral spreader designed by the invention is convenient to operate, the height adjustment can be realized by simple pulling, the convenience of use of the intervertebral spreader is improved, the labor intensity of medical workers is reduced, and smooth operation is facilitated.

Example 2

This embodiment explains the fixing of thelower half body 1b on the basis ofembodiment 1.

As shown in fig. 1-7 and 13, the medical intervertebral spreader with adjustable spreading height of the invention is provided with aholding rod 7 at one side of thelower half body 1b provided with aninclined hole 13, the axis of theholding rod 7 is parallel to the axis of thepulling rod 4, one end of theholding rod 7 far away from thelower half body 1b is connected with ahandle rod 11, and the axis of thehandle rod 11 is perpendicular to the axis of theholding rod 7 and perpendicular to the plane.

The arrangement of theholding rod 7 and thehandle rod 11 facilitates the convenient and fast fixing of thelower half body 1b during the use of the present invention, further improving the convenience of operation.

Example 3

The present embodiment is explained for the limitation of the moving distance of thepulling rod 4.

As shown in fig. 1-7 and fig. 9 and 13, the medical intervertebral spreader with adjustable spreading height of the invention is provided with asupport shaft 8 and alimit strip 9 which are connected in sequence on one side of the side wall of theholding rod 7 close to thepulling rod 4, thelimit strip 9 is bent into a semicircle, the outer convex surface of the limit strip is connected with theholding rod 7 through thesupport shaft 8, and when the opposite surfaces of the upper half body 1a and thelower half body 1b are contacted with each other, thepulling rod 4 is inscribed in the inner concave surface of thelimit strip 9;

abaffle 10 is arranged on one side, close to theholding rod 7, of the side wall of thepulling rod 4, thebaffle 10 is located between thelower half body 1b and the limitingstrips 9, when thepulling rod 4 is pulled in the direction away from theopening body 1, thebaffle 10 can move towards thelimiting strips 9 and is in contact with thelimiting strips 9, and when thebaffle 10 is in contact with thelimiting strips 9, the tail end of theguide shaft 5 is located in theguide hole 6.

In order to prevent theguide shaft 5 from being removed from theguide hole 6 due to the excessively large moving distance of the pullingrod 4, and then the upper half body 1a loses the limiting function of theguide shaft 5 to generate the unfavorable condition of moving in the axial direction of the pullingrod 4, a limitingstrip 9 and abaffle 10 are arranged to control the maximum moving distance of the pullingrod 4 in the axial direction, and then theguide shaft 5 is prevented from being removed from theguide hole 6.

Example 4

This embodiment is illustrative of the elliptical parameters used in the present invention.

As shown in fig. 1-13, in the cross section of the elliptical frustum, the radius of the major axis of the ellipse is R, the radius of the minor axis is R, and the minor axis is 1/2-1/5R and is parallel to the plane.

The flatter the ellipse of the cross section of the elliptical frustum is, the more beneficial the head of the distractor is to be inserted into the spine, but the height of distraction of the head which is too flat is limited, so the ratio of the relationship between the minor axis and the major axis is chosen to be verified in consideration of the above two factors.

Example 5

As shown in fig. 1 to 13, the medical intervertebral distractor with adjustable distraction height of the invention is provided with across bar 12 on one side of the pullingrod 4 far away from thedistraction body 1, and the axis of thecross bar 12 is perpendicular to the axis of the pullingrod 4 and parallel to the plane.

The provision of thecrossbar 12 facilitates the operation of the pullingrod 4.

Further, the cross section of the inclined hole is rectangular.

Further, the side wall of the elliptic cone frustum is smoothly transited to the side wall of the elliptic cylinder.

The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be made by those skilled in the art without inventive work within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.

Claims (7)

1. The utility model provides a medical treatment that struts height-adjustable struts ware with intervertebral which characterized in that: the supporting body (1) comprises an elliptic cone table and an elliptic cylinder body which are sequentially connected and share the same axis, the large end face of the elliptic cone table is connected with the end face of the elliptic cylinder body, the supporting body (1) is equally divided into an upper half body (1a) and a lower half body (1b) along a plane passing through the axis of the supporting body (1), the upper half body (1a) and the lower half body (1b) respectively comprise a semi-elliptic cone table (1c) and a semi-elliptic cylinder body (1d) which are sequentially connected, inclined holes (13) are respectively arranged on one side, far away from the semi-elliptic cone table (1c), of the semi-elliptic cylinder body (1d), and the distance between the axes of the inclined holes (13) gradually increases along the axis of the supporting body (1) along with the approaching to the semi-elliptic cone table (1 c);

the pushing body (2) comprises a conjunction block (3) and a pulling rod (4) which are sequentially connected, the conjunction block (3) is a V-shaped block and comprises a middle block (3a) and two oblique strips (3b) which are connected with the middle block (3a), the distance between the oblique strips (3b) is gradually increased along with the distance from the middle block (3a), one end, far away from the inner side of the conjunction block (3), of the middle block (3a) is connected with one end of the pulling rod (4), the axis of the pulling rod (4) is parallel to the axis of the spreading body (1), the oblique strips (3b) are respectively inserted into one oblique hole (13), and the cross section size of each oblique hole (13) is consistent with that of the oblique strip (3 b);

the mutually opposite surfaces of the upper half body (1a) and the lower half body (1b) are respectively provided with a guide shaft (5) and a guide hole (6), the guide hole (6) is matched with the guide shaft (5), and the axes of the guide shaft (5) and the guide hole (6) are perpendicular to the plane.

2. The medical intervertebral distractor with adjustable distraction height according to claim 1, wherein: one side of the lower half body (1b) provided with the inclined hole (13) is provided with a holding rod (7), the axis of the holding rod (7) is parallel to the axis of the pulling rod (4), one end of the holding rod (7) far away from the lower half body (1b) is connected with a handle rod (11), and the axis of the handle rod (11) is perpendicular to the axis of the holding rod (7) and perpendicular to the plane.

3. The medical intervertebral distractor with adjustable distraction height according to claim 2, wherein: a supporting shaft (8) and a limiting strip (9) which are sequentially connected are arranged on one side, close to the pulling rod (4), of the side wall of the holding rod (7), the limiting strip (9) is bent into a semicircular shape, the outer convex surface of the limiting strip (9) is connected with the holding rod (7) through the supporting shaft (8), and when the opposite surfaces of the upper half body (1a) and the lower half body (1b) are mutually contacted, the pulling rod (4) is internally tangent to the inner concave surface of the limiting strip (9);

a baffle (10) is arranged on one side, close to the holding rod (7), of the side wall of the pulling rod (4), the baffle (10) is located between the lower half body (1b) and the limiting strip (9), when the pulling rod (4) is pulled in the direction far away from the opening body (1), the baffle (10) can move towards the limiting strip (9) and is in contact with the limiting strip (9), and when the baffle (10) is in contact with the limiting strip (9), the tail end of the guide shaft (5) is located in the guide hole (6).

4. The medical intervertebral distractor with adjustable distraction height according to claim 1, wherein: in the cross section of the elliptical truncated cone, the radius of the long axis of the ellipse is R, the radius of the short axis of the ellipse is R, the R is (1/2-1/5) R, and the short axis of the ellipse is parallel to the plane.

5. The medical intervertebral spacer with adjustable spreading height according to any one of claims 1 to 4, wherein: a cross rod (12) is arranged on one side, far away from the spreading body (1), of the pulling rod (4), and the axis of the cross rod (12) is perpendicular to the axis of the pulling rod (4) and parallel to the plane.

6. The medical intervertebral spacer with adjustable spreading height according to any one of claims 1 to 4, wherein: the cross section of the inclined hole is rectangular.

7. The medical intervertebral spacer with adjustable spreading height according to any one of claims 1 to 4, wherein: the side wall of the elliptic cone frustum is smoothly transited to the side wall of the elliptic cylinder.

Images