Intervertebral space distraction device

Abstract

The utility model relates to an intervertebral space distraction device which comprises a distraction driving assembly and a distraction assembly arranged at one end of the distraction driving assembly. The distraction assembly comprises a first distraction piece and a second distraction piece, the first distraction piece and the second distraction piece are oppositely arranged, and the first distraction piece and the second distraction piece are located on the two sides of the distraction driving assembly respectively; the distraction driving assembly comprises a driving rod and a distraction driving part arranged at one end of the driving rod, the first distraction part and the second distraction part are located on the two sides of the driving rod respectively, and the driving rod can drive the distraction driving part to move in the axial direction of the driving rod; the distraction driving part moves to drive the first distraction part and the second distraction part to move in the direction away from the driving rod, narrow and small intervertebral space can be distraction by means of the technical scheme, then the height of the intervertebral space can be recovered, follow-up intervertebral space treatment and intervertebral fusion cage implantation are facilitated, and the intervertebral space distraction device is suitable for popularization and application. And the safety and the efficiency of the operation are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to an intervertebral space distraction device. BACKGROUND

[0002] The endoscopic lumbar fusion surgery is a minimally invasive lumbar fusion surgery, which has the advantages of small trauma, less bleeding, fast recovery, high safety and good effect, etc. However, for the symptoms of lumbar disc herniation, spinal stenosis or spondylolisthesis with severe disc degeneration, obvious collapse and obvious narrowing of the intervertebral space, it is very difficult to process the disc tissue under the endoscope. The reasons for the difficulty are as follows: first, the nerve space is narrow, which is easy to damage the exit or walking nerve root; second, the intervertebral space is narrow, which affects the entry and exit of the intervertebral processing tool. However, the existing distraction device is prone to slipping, or it cannot restore the normal height of the spinal canal, thereby increasing the difficulty of the lumbar fusion surgery. CONTENT OF THE UTILITY MODEL

[0003] In order to solve the problems of the prior art, the present application provides a technical scheme of an intervertebral space distraction device, that is, the present application sets a distraction driving assembly and a distraction assembly arranged at one end of the distraction driving assembly. The first distraction member and the second distraction member in the distraction assembly are respectively located at both sides of the distraction driving assembly, and then the driving rod in the distraction driving assembly can drive the distraction driving member in the distraction driving assembly to move along the axial direction of the driving rod, so as to drive the first distraction member and the second distraction member to move towards the direction away from the driving rod, thereby distracting the narrow and small intervertebral space, restoring the height of the intervertebral space, and facilitating the subsequent processing of the intervertebral space and the implantation of the intervertebral fusion cage, thereby improving the safety and efficiency of the surgery.

[0004] The present application provides an intervertebral space distraction device, which comprises a distraction driving assembly and a distraction assembly arranged at one end of the distraction driving assembly.

[0005] The distraction assembly comprises a first distraction member and a second distraction member, the first distraction member and the second distraction member are arranged oppositely, and the first distraction member and the second distraction member are respectively located at both sides of the distraction driving assembly.

[0006] The distraction driving assembly comprises a driving rod and a distraction driving member arranged at one end of the driving rod, the first distraction member and the second distraction member are respectively located at both sides of the driving rod, the driving rod can drive the distraction driving member to move along the axial direction of the driving rod, and the movement of the distraction driving member can drive the first distraction member and the second distraction member to move towards the direction away from the driving rod.

[0007] Further, the driving rod comprises an inner driving rod and a fixed rod arranged outside the inner driving rod, the fixed rod is sleeved outside the inner driving rod, and the outer side wall of one end of the fixed rod is fixedly connected with the strutting driving part, and the inner driving rod is movable relative to the strutting driving part.

[0008] Further, one end of the first strutting part and one end of the second strutting part are rotationally connected with the outer side wall of one end of the fixed rod close to the strutting driving part.

[0009] Further, the strutting driving part comprises a connecting part and a strutting driving body arranged at one end of the connecting part, the connecting part is fixedly connected with the strutting driving body, and at least part of the structure of the connecting part is located outside the inner driving rod.

[0010] Further, the connecting part is internally provided with a threaded structure, the outer side wall of one end of the inner driving rod close to the connecting part is provided with a threaded matching structure, and the threaded matching structure is matched with the threaded structure.

[0011] Further, the strutting driving body is provided with a first inclined surface and a second inclined surface, the first inclined surface and the second inclined surface are located on the side of the strutting driving body close to the connecting part, and the first inclined surface and the second inclined surface are oppositely arranged.

[0012] Further, one end of the first strutting part away from the fixed rod is in abutment with the first inclined surface, and one end of the second strutting part away from the fixed rod is in abutment with the second inclined surface.

[0013] Further, one end of the fixed rod away from the strutting driving part is provided with a holding part, the holding part is of an annular structure, and the outer diameter of the annular holding part increases in sequence in the direction away from the strutting driving part.

[0014] Further, a rotating driving part is further included, the rotating driving part is located on the side of the holding part away from the strutting driving part, and the driving end of the rotating driving part is fixedly connected with the other end of the inner driving rod.

[0015] Further, the outer side wall of the rotating driving part is provided with anti-skid stripes, and the anti-skid stripes are arranged along the axial direction of the rotating driving part.

[0016] The application has the following beneficial effects:

[0017] The application sets the expansion driving assembly and the expansion assembly arranged at one end of the expansion driving assembly, wherein the first expansion piece and the second expansion piece in the expansion assembly are respectively arranged at two sides of the expansion driving assembly, and then the driving rod in the expansion driving assembly can drive the expansion driving piece in the expansion driving assembly to move along the axial direction of the driving rod, so as to drive the first expansion piece and the second expansion piece to move towards the direction away from the driving rod, thereby the narrow and small intervertebral space can be expanded, the height of the intervertebral space is recovered, and the subsequent treatment of the intervertebral space and the implantation of the intervertebral fusion cage are facilitated, and the safety and efficiency of the operation are improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0019] Figure 1 A structural schematic diagram of an intervertebral space expansion device provided by an embodiment of the present application;

[0020] Figure 2 A sectional view of the intervertebral space expansion device provided by the embodiment of the present application;

[0021] Figure 3 A partial structural schematic diagram of the intervertebral space expansion device provided by the embodiment of the present application in a folded state;

[0022] Figure 4 A partial sectional view of the intervertebral space expansion device provided by the embodiment of the present application in a folded state;

[0023] In the drawings, the reference signs correspond to: 11-first expansion piece; 12-second expansion piece; 21-driving rod; 211-inner driving rod; 213-thread matching structure; 212-fixed rod; 22-expansion driving piece; 221-connection part; 222-expansion driving body; 223-first inclined surface; 224-second inclined surface; 3-holding piece; 4-rotary driving piece; 41-anti-skid stripe. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0025] It should be noted that in the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] The embodiments will be described below with reference to the drawings, which do not limit the disclosure recorded in the claims in any way.

[0027] Please refer to Figures 1-4 , the following will be combined Figures 1-4 to explain in detail the intervertebral space distraction device provided by the embodiments of the present application.

[0028] The embodiments of the present application provide an intervertebral space distraction device, as shown in Figures 1-4 , specifically, the intervertebral space distraction device includes a distraction driving assembly and a distraction assembly arranged at one end of the distraction driving assembly.

[0029] Among them, the distraction assembly includes a first distraction member 11 and a second distraction member 12, the first distraction member 11 and the second distraction member 12 are arranged opposite to each other, and the first distraction member 11 and the second distraction member 12 are respectively located on both sides of the distraction driving assembly; the distraction driving assembly includes a driving rod 21 and a distraction driving member 22 arranged at one end of the driving rod 21, the first distraction member 11 and the second distraction member 12 are respectively located on both sides of the driving rod 21, the driving rod 21 can drive the distraction driving member 22 to move along the axial direction of the driving rod 21, the movement of the distraction driving member 22 can drive the first distraction member 11 and the second distraction member 12 to move towards the direction away from the driving rod 21.

[0030] In the embodiments of the present application, the first distraction member 11 and the second distraction member 12 can jointly act on the intervertebral space to distract the intervertebral space, so as to enlarge the intervertebral space, specifically, the driving rod 21 can be used to drive the distraction driving member 22 to move towards the direction of the driving rod 21, and then the distraction driving member 22 can drive the first distraction member 11 and the second distraction member 12 to move towards the direction away from the driving rod 21, so as to distract the narrow and small intervertebral space, so as to restore the height of the intervertebral space, facilitate the subsequent treatment of the intervertebral space and the implantation of the intervertebral fusion cage, and improve the safety and efficiency of the operation.

[0031] In a specific embodiment, as Figure 3As shown, when the intervertebral space opening device is in the retracted state, the first opening member 11 and the second opening member 12 partially overlap, and the width of the first opening member 11 and the second opening member 12 is small, which makes the opening structure composed of the first opening member 11 and the second opening member 12 in a thin sheet state, thereby helping the intervertebral space opening device to be inserted into the narrow intervertebral space.

[0032] In practical applications, both the first support member 11 and the second support member 12 are thin sheet structures with bent portions. The bent portions on the first support member 11 and the second support member 12 are arranged opposite to each other. When the intervertebral disc opening device is in the retracted state, the bent portions on the first support member 11 and the second support member 12 are in a cross state. Furthermore, a support and stabilizing structure is provided on the side of the first support member 11 away from the second support member 12, and a support and stabilizing structure is also provided on the side of the second support member 12 away from the first support member 11. Thus, when the first support member 11 and the second support member 12 are in the open state, the support and stabilizing structures on the first support member 11 and the second support member 12 can be used to support and stabilize the intervertebral disc, thereby improving the stability and reliability of opening the intervertebral disc. For example, the support and stabilizing structure can be a wave-shaped structure or an inverted triangular structure.

[0033] In one alternative implementation, such as Figure 2 As shown, the drive rod 21 includes an inner drive rod 211 and a fixed rod 212 disposed outside the inner drive rod 211. The fixed rod 212 is sleeved outside the inner drive rod 211, and the outer side wall of one end of the fixed rod 212 is fixedly connected to the spreading drive member 22. The inner drive rod 211 is movable relative to the spreading drive member 22.

[0034] In this embodiment of the application, one end of the inner drive rod 211 is connected to the spreading drive member 22, and the inner drive rod 211 can move relative to the spreading drive member 22. Thus, the movement of the inner drive rod 211 can drive the spreading drive member 22 to move along the axial direction of the drive rod 21, thereby enabling the first spreading member 11 and the second spreading member 12 to switch between the retracted state and the spreading state.

[0035] In practical applications, the cross-section of the inner drive rod 211 is the same as that of the fixed rod 212. Specifically, the cross-section of the inner drive rod 211 can be circular, triangular, elliptical or rectangular. Preferably, the cross-section of the inner drive rod 211 is circular. Further, the cross-section of the fixed rod 212 can be circular, triangular, elliptical or rectangular. Preferably, the cross-section of the fixed rod 212 is circular.

[0036] In one specific embodiment, one end of the first dilator 11 and one end of the second dilator 12 are both rotationally connected to the outer side wall of the fixed rod 212 near the one end of the dilator driving member 22.

[0037] In the embodiment of the present application, one end of the first dilator 11 is rotationally connected to the outer side wall of the fixed rod 212 near the one end of the dilator driving member 22, so that the other end of the first dilator 11 can rotate with the connecting part of the fixed rod 212 as the rotation axis. Further, one end of the second dilator 12 is rotationally connected to the outer side wall of the fixed rod 212 near the one end of the dilator driving member 22, so that the other end of the second dilator 12 can rotate with the connecting part of the fixed rod 212 as the rotation axis. In this way, the dilator driving member 22 can drive the first dilator 11 and the second dilator 12 to rotate towards the direction away from the driving rod 21, so as to support the intervertebral space.

[0038] In one optional embodiment, as shown in Figure 3 and Figure 4 the dilator driving member 22 comprises a connecting part 221 and a dilator driving body 222 arranged at one end of the connecting part 221, and the connecting part 221 is fixedly connected to the dilator driving body 222. At least part of the structure of the connecting part 221 is located outside the inner driving rod 211.

[0039] In the embodiment of the present application, the connecting part 221 is used to match the inner driving rod 211, and the dilator driving body 222 is used to drive the first dilator 11 and the second dilator 12 to rotate. In this way, through the matched connection of the connecting part 221 and the inner driving rod 211, the inner driving rod 211 can drive the dilator driving body 222 to move along the axial direction of the inner driving rod 211 through the connecting part 221, so as to drive the first dilator 11 and the second dilator 12 to rotate towards the direction away from the driving rod 21, thereby achieving the dilatation of the first dilator 11 and the second dilator 12.

[0040] In one specific embodiment, as shown in Figure 3 the connecting part 221 is provided with a threaded structure, and the outer side wall of the one end of the inner driving rod 211 near the connecting part 221 is provided with a threaded matching structure 213 which matches the threaded structure.

[0041] Specifically, by the threaded connection between the threaded structure in the connecting portion 221 and the threaded matching structure 213 on the outer sidewall of the inner driving rod 211, the driving of the distraction driving body 222 can be achieved. In actual application, when the inner driving rod 211 is tightened with the connecting portion 221, the connecting portion 221 can move towards the inner driving rod 211, and thus the distraction driving body 222 can be driven to move towards the inner driving rod 211, at which time the distraction driving body 222 can distract the first distraction member 11 and the second distraction member 12 to support the intervertebral space.

[0042] In one specific embodiment, as shown in Figure 3 and Figure 4 , the distraction driving body 222 is provided with a first inclined surface 223 and a second inclined surface 224, both of which are located on the side of the distraction driving body 222 close to the connecting portion 221, and the first inclined surface 223 and the second inclined surface 224 are oppositely arranged. Specifically, the end of the first distraction member 11 away from the fixed rod 212 abuts against the first inclined surface 223, and the end of the second distraction member 12 away from the fixed rod 212 abuts against the second inclined surface 224.

[0043] In the embodiment of the present application, when the distraction driving body 222 moves towards the inner driving rod 211, the first inclined surface 223 can drive the end of the first distraction member 11 away from the fixed rod 212 to rotate towards the direction away from the inner driving rod 211, and the second inclined surface 224 can drive the end of the second distraction member 12 away from the fixed rod 212 to rotate towards the direction away from the inner driving rod 211, thereby achieving the distraction driving of the first distraction member 11 and the second distraction member 12.

[0044] In one optional embodiment, as shown in Figure 1 and Figure 2 , the end of the fixed rod 212 away from the distraction driving member 22 is provided with a gripping member 3, which is annular in structure, and the outer diameter of the annular gripping member 3 increases in sequence in the direction away from the distraction driving member 22.

[0045] In the embodiment of the present application, the gripping member 3 is provided to hold the intervertebral space distraction device, and further, the outer diameter of the gripping member 3 is set to increase in sequence in the direction away from the distraction driving member 22, thereby avoiding the situation that the gripping member 3 close to the distraction driving member 22 blocks the intervertebral space and cannot extend to the distant intervertebral space, so that the distant intervertebral space cannot be distracted.

[0046] In one optional embodiment, as shown in Figure 1 and Figure 2As shown, the intervertebral space distraction device further comprises a rotating driving member 4, which is located on the side of the holding member 3 away from the distraction driving member 22, and the driving end of the rotating driving member 4 is fixedly connected with the other end of the inner driving rod 211.

[0047] Specifically, the rotating driving member 4 is arranged to drive the inner driving rod 211 to rotate, in a specific embodiment, as shown in the drawings, the rotating driving member 4 is arranged to be rotated by the operator. Figure 1 As shown, the outer side wall of the rotating driving member 4 is provided with anti-skid stripes 41, which are arranged along the axial direction of the rotating driving member 4. The anti-skid stripes 41 are arranged to increase the friction between the rotating driving member 4 and the hand, so as to avoid the situation of slipping when the rotating driving member 4 is twisted by the hand, thereby improving the stability of the intervertebral space distraction device.

[0048] In combination with the above description of the specific structure of the intervertebral space distraction device, the specific working principle of the intervertebral space distraction device will be described below.

[0049] Specifically, the operator can insert the intervertebral space distraction device in the collapsed state into the intervertebral space, and then rotate the rotating driving member 4 while holding the holding member 3, so that the rotating driving member 4 can drive the inner driving rod 211 to rotate. The rotation of the inner driving rod 211 can make the distraction driving member 22 move towards the direction where the inner driving rod 211 is located. At this time, the first inclined surface 223 on the distraction driving body 222 of the distraction driving member 22 drives the first distraction member 11 to rotate away from the end of the fixed rod 212 towards the direction away from the inner driving rod 211. The second inclined surface 224 on the distraction driving body 222 of the distraction driving member 22 drives the second distraction member 12 to rotate away from the end of the fixed rod 212 towards the direction away from the inner driving rod 211. Thus, the distraction driving of the first distraction member 11 and the second distraction member 12 can be achieved, so that the intervertebral space distraction device is in the distraction state. When it is necessary to pull out the intervertebral space distraction device, the rotating driving member 4 can be rotated in the opposite direction. At this time, the distraction driving member 22 can move towards the direction away from the inner driving rod 211, so that the intervertebral space distraction device is in the collapsed state, and the intervertebral space distraction device can be pulled out.

[0050] The above embodiments of the present application have the following beneficial effects:

[0051] The application sets the distraction driving assembly and the distraction assembly arranged at one end of the distraction driving assembly, wherein the first distraction member and the second distraction member in the distraction assembly are respectively arranged at two sides of the distraction driving assembly, and then the driving rod in the distraction driving assembly can drive the distraction driving member in the distraction driving assembly to move along the axial direction of the driving rod, so as to drive the first distraction member and the second distraction member to move towards the direction away from the driving rod, and then the narrow and small intervertebral space can be distracted to restore the height of the intervertebral space, thereby facilitating the subsequent treatment of the intervertebral space and the implantation of the intervertebral fusion cage, and improving the safety and efficiency of the operation.

[0052] The structure shown in the embodiment only relates to part of the structure of the scheme of the application, and does not constitute a limitation on the device to which the scheme of the application is applied. The specific device can include more or fewer components than shown, or combine certain components, or have a different arrangement of components. It should be understood that the method, device, etc. disclosed in the embodiment can be implemented in other ways.

[0053] The above is only a specific implementation of the application, but the protection scope of the application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the application, which should be covered within the protection scope of the application. Therefore, the protection scope of the application should be subject to the protection scope of the claims.

Claims

1. An intervertebral disc space distraction device comprising: The dilating drive assembly comprises a dilating drive component and a dilating assembly arranged at one end of the dilating drive assembly. The dilating assembly comprises a first dilating component (11) and a second dilating component (12), the first dilating component (11) and the second dilating component (12) are arranged oppositely, and the first dilating component (11) and the second dilating component (12) are respectively located at two sides of the dilating drive assembly. The dilating drive assembly comprises a drive rod (21) and a dilating drive component (22) arranged at one end of the drive rod (21), the first dilating component (11) and the second dilating component (12) are respectively located at two sides of the drive rod (21), and the drive rod (21) can drive the dilating drive component (22) to move along the axial direction of the drive rod (21), and the movement of the dilating drive component (22) can drive the first dilating component (11) and the second dilating component (12) to move towards the direction away from the drive rod (21).

2. The intervertebral disc distraction device of claim 1 wherein, The drive rod (21) comprises an inner drive rod (211) and a fixed rod (212) arranged outside the inner drive rod (211), the fixed rod (212) is sleeved outside the inner drive rod (211), and the outer side wall of one end of the fixed rod (212) is fixedly connected with the dilating drive component (22), and the inner drive rod (211) is movable relative to the dilating drive component (22).

3. The intervertebral disc distraction device of claim 2 wherein, One end of the first dilating component (11) and one end of the second dilating component (12) are rotatably connected with the outer side wall of one end of the fixed rod (212) close to the dilating drive component (22).

4. The intervertebral disc distraction device of claim 3 wherein, The dilating drive component (22) comprises a connecting part (221) and a dilating drive body (222) arranged at one end of the connecting part (221), the connecting part (221) is fixedly connected with the dilating drive body (222), and at least part of the structure of the connecting part (221) is located outside the inner drive rod (211).

5. The intervertebral disc distraction device of Claim 4 wherein, The connecting part (221) is provided with a threaded structure, the outer side wall of one end of the inner drive rod (211) close to the connecting part (221) is provided with a threaded matching structure (213), and the threaded matching structure (213) is matched with the threaded structure.

6. The intervertebral disc distraction device of Claim 4 wherein, The dilating drive body (222) is provided with a first inclined surface (223) and a second inclined surface (224), the first inclined surface (223) and the second inclined surface (224) are located on the side of the dilating drive body (222) close to the connecting part (221), and the first inclined surface (223) and the second inclined surface (224) are arranged oppositely.

7. The intervertebral disc distraction device of Claim 6 wherein, The end of the first dilating component (11) away from the fixed rod (212) abuts against the first inclined surface (223), and the end of the second dilating component (12) away from the fixed rod (212) abuts against the second inclined surface (224).

8. The intervertebral disc distraction device of claim 2 wherein, The fixed rod (212) is provided with a holding piece (3) at one end away from the distraction driving part (22), the holding piece (3) is annular structure, the outer diameter of the holding piece (3) in annular structure is sequentially increased in the direction away from the distraction driving part (22).

9. The intervertebral disc space distraction device as recited in claim 8, wherein, A rotating driving part (4) is further included, which is located at one side of the holding piece (3) away from the distraction driving part (22), and a driving end of the rotating driving part (4) is fixedly connected with the other end of the inner driving rod (211).

10. The intervertebral disc space distraction device as recited in claim 9, wherein, The outer side wall of the rotating driving part (4) is provided with anti-skid stripes (41), which are arranged along the axial direction of the rotating driving part (4).

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