Vertebral body dilator

Abstract

The utility model provides a vertebral body dilator, which belongs to the field of medical instruments and comprises a sleeve, a movable rod, a rotary operating part and a dilating body, the movable rod is slidably connected with the sleeve, one end of the sleeve is rotatably connected with the rotary operating part, the other end of the sleeve is detachably connected with the dilating body, a sleeve internal thread is arranged in the rotary operating part, and the sleeve internal thread is connected with the dilating body. A rod body external thread is arranged at one end of the movable rod and connected with the sleeve internal thread in a matched mode. The utility model aims to solve the problem of insufficient distraction force of a vertebral body distraction device in the prior art. The vertebral body distraction device has the technical effects that the distraction device has relatively large distraction force, so that the situation of insufficient distraction force is avoided; the distraction body is detachably connected with the sleeve, and the distraction body is pushed by the movable rod to realize distraction when distraction the spine, so that the distraction device can be matched with different spines by adopting different distraction bodies, and the conditions of mismatching and repeated replacement in use are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field especially relates to vertebral body distractor. BACKGROUND

[0002] Spinal fusion surgery has achieved good curative effect in treating cervical and lumbar pain and cervical and lumbar instability, and is a conventional surgical procedure for treating degenerative disc disease, spondylolisthesis and spinal segmental instability. In order to achieve an acceptable spinal fusion surgery, a vertebral body distractor is often needed to distract or reduce the intervertebral space.

[0003] However, the fixed vertebral body distractor currently used in clinical practice either comes in a complete set, which may not match and need to be replaced repeatedly due to size settings, thereby increasing the operation time and risk. The vertebral body distractor that can be distracted may not have sufficient distraction force, which may not achieve the desired effect. SUMMARY

[0004] The utility model provides vertebral body distractor to solve the defect that vertebral body distractor of prior art is insufficient in distraction force, and realizes the vertebral body distractor structure with larger distraction force.

[0005] The utility model provides a kind of vertebral body distractor, including sleeve, movable rod, rotating operating part and distraction body, movable rod and sleeve are slidably connected, one end of sleeve is rotatably connected with rotating operating part, the other end of sleeve is detachably connected with distraction body, sleeve inner thread is provided in rotating operating part, one end of movable rod is provided with rod outer thread, and rod outer thread is connected with sleeve inner thread.

[0006] According to the vertebral body distractor of the utility model, since the rod outer thread and the sleeve inner thread are matched and arranged, the distractor can have a larger distraction force, avoiding insufficient distraction force, and by detachable connection of the distraction body and the sleeve and distraction of the distraction body, the distractor can use different distraction bodies to match different spines, avoiding mismatch and repeated replacement during use, thereby reducing the operation time and risk.

[0007] In addition, the vertebral body distractor according to the utility model can also have the following additional technical features:

[0008] In some embodiments of the utility model, the movable rod includes a sliding rod, a wedge, a screw rod and a plug rod, one end of the sliding rod is connected with the wedge, the other end of the sliding rod is connected with the screw rod, the plug rod is slidably connected with the sleeve through the screw rod, and the outer periphery of the screw rod is provided with a rod outer thread.

[0009] By adopting the above embodiments, the wedge block allows the spinal stretcher to gradually stretch the spine, increasing the convenience and safety of stretching the spine; the insertion rod limits the movement of the movable rod relative to the sleeve in the rotation direction, preventing the movable rod from rotating when the rotating operating component moves it, thus increasing the reliability of this stretcher.

[0010] In some embodiments of this utility model, the movable rod further includes a first slider and a second slider. The first slider is disposed in the middle of the slide rod, and the second slider is disposed at the end of the slide rod away from the screw. A wedge is disposed at the end of the second slider away from the slide rod.

[0011] By adopting the above embodiment, the arrangement of the first slider being located in the middle of the slide rod and the second slider being located at the end of the slide rod away from the screw rod enables reliable sliding of the movable rod relative to the sleeve.

[0012] In some embodiments of this utility model, the rotating operating component includes a rotating sleeve, a connecting rod, and a rotating handle. One end of the connecting rod is connected to the rotating sleeve, and the other end of the connecting rod is connected to the rotating handle. The rotating sleeve is inserted into the sleeve, and the rotating sleeve is provided with an internal thread.

[0013] By adopting the above embodiments, the rotating handle increases the convenience for medical staff to operate the rotating component relative to the cannula.

[0014] In some embodiments of this utility model, the rotating operating component further includes a connecting transition component, which is connected to the connecting rod via a rotating handle.

[0015] By adopting the above embodiments, the connection transition piece increases the stability of the connection between the rotary handle and the connecting rod.

[0016] In some embodiments of this utility model, the sleeve includes an outer tube, a transition tube, and a positioning ring. One end of the transition tube is connected to the outer tube, and the other end of the transition tube is provided with a positioning ring. An inner step is provided inside the transition tube, and a rotating sleeve is disposed between the inner step and the positioning ring. A sliding rod is slidably connected inside the outer tube.

[0017] By adopting the above embodiments, the arrangement of the outer tube, transition tube, and positioning ring increases the ease of installation of this spreader.

[0018] In some embodiments of this utility model, the sleeve further includes a tail connector, and a tail connector is provided at the end of the outer tube away from the transition tube, and a spring block is provided on the side wall of the tail connector.

[0019] The expansion body includes a connector, a first expansion member, and a second expansion member. One end of the connector is sleeved on the tail connector. The first expansion member and the second expansion member are both connected to the end of the connector that is away from the tail connector. The first expansion member and the second expansion member are arranged opposite to each other.

[0020] In some embodiments of this utility model, a positioning handle is also included, which is disposed on one side of the sleeve.

[0021] By adopting the above embodiments, the positioning handle increases the ease of use of this spreader.

[0022] In summary, this application includes the following beneficial technical effects:

[0023] Due to the matching design of the external thread of the rod and the internal thread of the sleeve, this retractor can achieve a large retraction force, avoiding the situation of insufficient retraction force. Through the detachable connection between the retractor and the sleeve, and the fact that the retractor retracts the spine by pushing with a movable rod, this retractor can use different retractors to match different spines, avoiding mismatch during use and repeated replacements, thereby reducing the operation time and lowering the operation risk. Attached Figure Description

[0024] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0025] Figure 1 A perspective view of a vertebral expander according to some embodiments of the present invention is shown schematically.

[0026] Figure 2 A perspective view of a vertebral expander according to some embodiments of the present invention without an expander is schematically shown.

[0027] Figure 3 A vertebral expander according to some embodiments of the present invention is schematically shown. Figure 2 A magnified view of a portion of the image.

[0028] Figure 4 The first perspective view schematically shows the connection between the sleeve and the positioning handle of a vertebral expander according to some embodiments of the present invention.

[0029] Figure 5 A vertebral expander according to some embodiments of the present invention is schematically shown. Figure 4 A magnified view of a portion of the image.

[0030] Figure 6 A second perspective view schematically showing the connection between the sleeve and the positioning handle of a vertebral expander according to some embodiments of the present invention is shown.

[0031] Figure 7 The diagram schematically illustrates the structure of the movable rod, rotating operating component, and expansion body of a vertebral expander according to some embodiments of the present invention.

[0032] Figure 8 A perspective view of the movable rod of a vertebral expander according to some embodiments of the present invention is shown schematically.

[0033] Figure 9 A perspective view schematically illustrates the rotating operating element of a vertebral expander according to some embodiments of the present invention.

[0034] Figure 10 A perspective view schematically showing the connection between the rotating sleeve and the connecting rod of a vertebral expander according to some embodiments of the present invention is shown.

[0035] Figure 11 A perspective view of the positioning ring of a vertebral expander according to some embodiments of the present invention is shown schematically.

[0036] Figure 12 A perspective view of the expander of a vertebral expander according to some embodiments of the present invention is shown schematically.

[0037] Figure label:

[0038] 1. Sleeve, 11. Outer tube, 12. Transition tube, 13. Weight reduction hole, 14. Positioning ring, 141. Inner ring, 142. Threaded part, 143. Slot, 15. Tail connector, 151. Spring block, 16. Sliding hole, 17. Inner step, 2. Movable rod, 21. Sliding rod, 22. First slider, 23. Second slider, 24. Wedge block, 25. Screw, 251. Insertion hole, 252. External thread of rod body, 26. Insert rod, 3. Rotary operating part, 31. Rotary sleeve, 311. Internal thread of sleeve, 32. Connecting transition part, 33. Connecting rod, 34. Rotary handle, 4. Positioning handle, 5. Spreading body, 51. Connecting part, 52. First spreading part, 53. Second spreading part. Detailed Implementation

[0039] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0040] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “” used herein may also indicate the inclusion of the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated, unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0041] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0042] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may also be rotated 90 degrees or in other orientations, and the spatial relative descriptors used in the text will be interpreted accordingly.

[0043] like Figures 1 to 12 As shown, according to an embodiment of the first aspect of this utility model, a vertebral body expander is proposed, including a sleeve 1, a movable rod 2, a rotating operating component 3, and an expander body 5. The movable rod 2 is slidably connected to the sleeve 1, one end of the sleeve 1 is rotatably connected to the rotating operating component 3, and the other end of the sleeve 1 is detachably connected to the expander body 5. The rotating operating component 3 is provided with an internal sleeve thread 311, and one end of the movable rod 2 is provided with an external rod thread 252, which is engaged with the internal sleeve thread 311.

[0044] In the above embodiments, it should be noted that when the spinal spreader needs to spread the spine, the rotating operating component 3 is rotated, causing the rotating operating component 3 to drive the inner thread 311 of the sleeve to rotate, which in turn drives the outer thread 252 of the rod to move linearly, thereby driving the movable rod 2 to move. When the movable rod 2 moves to the end of the sleeve 1 away from the rotating operating component 3, the movement of the movable rod 2 will spread the spreader 5, and the spinal spreader is reliably spread through the spreader 5. The shape and style of the spreader 5 can be changed according to the actual situation.

[0045] The technical effects achieved by the above embodiments are as follows: Due to the matching arrangement of the external thread 252 of the rod and the internal thread 311 of the sleeve, the spreader can have a large spreading force, avoiding the occurrence of insufficient spreading force. Through the detachable connection between the spreader body 5 and the sleeve 1, and the fact that the spreader body 5 spreads the spine by pushing the movable rod 2, the spreader can use different spreader bodies 5 to match different spines, avoiding mismatch during use and repeated replacement, thereby reducing the operation time and lowering the operation risk.

[0046] Optional, such as Figures 1 to 3 as well as Figure 7 and Figure 8As shown, the movable rod 2 includes a slide rod 21, a wedge block 24, a screw rod 25, and an insert rod 26. One end of the slide rod 21 is connected to the wedge block 24, and the other end of the slide rod 21 is connected to the screw rod 25. The insert rod 26 passes through the screw rod 25 and is slidably connected to the sleeve 1. The outer periphery of the screw rod 25 is provided with an external thread 252.

[0047] In the above optional embodiments, it should be noted that the cross-sectional shape of the wedge 24 is triangular, and the slide rod 21, the wedge 24 and the screw 25 are integrally formed; during operation, the wedge 24 is inserted into the support body 5; the screw 25 has an insertion hole 251, and the insertion rod 26 is inserted into the insertion hole 251.

[0048] The advantages of the above optional embodiments are as follows: the wedge block 24 makes the spinal stretcher 5 gradually stretch the spine when stretching it, which increases the convenience and safety of stretching the spine; the insertion rod 26 limits the movable rod 2 relative to the sleeve 1 in the rotation direction, which avoids the movable rod 2 from rotating when the rotating operating member 3 drives the movable rod 2 to move, thus increasing the reliability of the stretcher.

[0049] Optional, such as Figures 1 to 3 as well as Figure 7 and Figure 8 As shown, the movable rod 2 also includes a first slider 22 and a second slider 23. The first slider 22 is disposed in the middle of the slide rod 21, and the second slider 23 is disposed at the end of the slide rod 21 away from the screw 25. A wedge block 24 is disposed at the end of the second slider 23 away from the slide rod 21.

[0050] In the above optional embodiments, it should be noted that the first slider 22 and the second slider 23 are integrally formed with the slide rod 21.

[0051] The advantages of the above optional embodiments are as follows: by setting the first slider 22 at the middle of the slide rod 21 and the second slider 23 at the end of the slide rod 21 away from the screw 25, reliable sliding of the movable rod 2 relative to the sleeve 1 is achieved.

[0052] Optional, such as Figure 7 , Figure 9 and Figure 10 As shown, the rotating operating component 3 includes a rotating sleeve 31, a connecting rod 33 and a rotating handle 34. One end of the connecting rod 33 is connected to the rotating sleeve 31, and the other end of the connecting rod 33 is connected to the rotating handle 34. The rotating sleeve 31 is inserted into the sleeve 1, and the rotating sleeve 31 is provided with an internal thread 311.

[0053] In the above optional embodiments, it should be noted that the rotating handle 34 is perpendicular to the connecting rod 33, and the rotating handle 34 is inserted into the connecting rod 33.

[0054] The advantages of the above optional embodiments are: the setting of the rotating handle 34 increases the convenience for medical staff to operate the rotating operating component 3 relative to the sleeve 1.

[0055] Optional, such as Figure 9 and Figure 10 As shown, the rotating operating component 3 also includes a connecting transition component 32, which is connected to the connecting rod 33 via a rotating handle 34.

[0056] The advantages of the above optional embodiments are that the connection stability between the rotating handle 34 and the connecting rod 33 is increased by the provision of the connecting transition piece 32.

[0057] Optional, such as Figure 4 and Figure 11 As shown, the sleeve 1 includes an outer tube 11, a transition tube 12 and a positioning ring 14. One end of the transition tube 12 is connected to the outer tube 11, and the other end of the transition tube 12 is provided with the positioning ring 14. An inner step 17 is provided inside the transition tube 12. The rotating sleeve 31 is located between the inner step 17 and the positioning ring 14. The slide rod 21 is slidably connected inside the outer tube 11.

[0058] In the above optional embodiments, it should be noted that the positioning ring 14 includes an inner ring 141 and a threaded portion 142. The outer periphery of the inner ring 141 is provided with the threaded portion 142, which is threadedly connected and fixed to the transition tube 12. The positioning ring 14 is provided with a slot 143, which passes through the inner ring 141 and the threaded portion 142 to realize a quick and convenient connection between the positioning ring 14 and the transition tube 12.

[0059] The advantages of the above optional embodiments are that the installation convenience of this spreader is increased by the arrangement of the outer tube 11, the transition tube 12 and the positioning ring 14.

[0060] Optional, such as Figures 1 to 6 As shown, the outer tube 11 has a sliding hole 16 on its side wall, and the insertion rod 26 passes through the screw 25 and is inserted into the sliding hole 16.

[0061] In the above optional embodiments, it should be noted that the sliding hole 16 is an elongated hole.

[0062] The advantages of the above optional embodiments are that the sliding hole 16 increases the convenience of sliding the slide rod 26 relative to the outer tube 11.

[0063] Optional, such as Figures 1 to 6 As shown, the sleeve 1 also includes a tail connector 15. The outer tube 11 is provided with a tail connector 15 at one end away from the transition tube 12, and a spring block 151 is provided on the side wall of the tail connector 15.

[0064] In the above optional embodiments, it should be noted that the expansion body 5 and the tail connector 15 are detachably connected.

[0065] The advantages of the above optional embodiments are: the tail connector 15 increases the convenience of connecting the expander 5 and the sleeve 1.

[0066] Optional, such as Figure 1 and Figure 12 As shown, the support body includes a connector 51, a first support member 52, and a second support member 53. One end of the connector 51 is sleeved on the tail connector 15. The first support member 52 and the second support member 53 are both connected to the end of the connector 51 that is away from the tail connector 15. The first support member 52 and the second support member 53 are arranged opposite to each other.

[0067] The advantages of the above optional embodiments are that the arrangement of connector 51, first support member 52 and second support member 53 can ensure reliable and rapid spinal expansion.

[0068] Optional, such as Figures 1 to 6 As shown, it also includes a positioning handle 4, which is located on one side of the sleeve 1.

[0069] In the above optional embodiments, it should be noted that the positioning handle 4 is integrally formed with the outer tube 11 and is located on the side of the outer tube 11.

[0070] The advantages of the above optional embodiments are: the positioning handle 4 increases the convenience of using this spreader.

[0071] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A vertebral body spreader, characterized in that, The device includes a sleeve (1), a movable rod (2), a rotating operating component (3), and a supporting body (5). The movable rod (2) is slidably connected to the sleeve (1). One end of the sleeve (1) is rotatably connected to the rotating operating component (3). The other end of the sleeve (1) is detachably connected to the supporting body (5). The rotating operating component (3) is provided with an internal sleeve thread (311). One end of the movable rod (2) is provided with an external rod thread (252). The external rod thread (252) is engaged with the internal sleeve thread (311).

2. The vertebral body expander according to claim 1, characterized in that, The movable rod (2) includes a slide rod (21), a wedge (24), a screw (25), and a plug rod (26). One end of the slide rod (21) is connected to the wedge (24), and the other end of the slide rod (21) is connected to the screw (25). The plug rod (26) passes through the screw (25) and is slidably connected to the sleeve (1). The outer periphery of the screw (25) is provided with the external thread (252) of the rod body.

3. The vertebral body expander according to claim 2, characterized in that, The movable rod (2) further includes a first slider (22) and a second slider (23). The first slider (22) is disposed in the middle of the slide rod (21), and the second slider (23) is disposed at one end of the slide rod (21) away from the screw (25). The wedge (24) is disposed at one end of the second slider (23) away from the slide rod (21).

4. The vertebral body expander according to claim 3, characterized in that, The rotating operating component (3) includes a rotating sleeve (31), a connecting rod (33) and a rotating handle (34). One end of the connecting rod (33) is connected to the rotating sleeve (31), and the other end of the connecting rod (33) is connected to the rotating handle (34). The rotating sleeve (31) is inserted into the sleeve (1), and the rotating sleeve (31) is provided with the sleeve internal thread (311).

5. The vertebral body expander according to claim 4, characterized in that, The rotating operating component (3) further includes a connecting transition component (32), which is connected to the connecting rod (33) via the rotating handle (34).

6. The vertebral body expander according to claim 4, characterized in that, The sleeve (1) includes an outer tube (11), a transition tube (12), a slide rod (21), and a positioning ring (14). One end of the transition tube (12) is connected to the outer tube (11), and the other end of the transition tube (12) is provided with the positioning ring (14). An inner step (17) is provided inside the transition tube (12). The rotating sleeve (31) is located between the inner step (17) and the positioning ring (14). The slide rod (21) is slidably connected inside the outer tube (11).

7. The vertebral body expander according to claim 6, characterized in that, The outer tube (11) has a sliding hole (16) on its side wall, and the insertion rod (26) passes through the screw (25) and is inserted into the sliding hole (16).

8. The vertebral body expander according to claim 6, characterized in that, The sleeve (1) also includes a tail connector (15). The tail connector (15) is provided at one end of the outer tube (11) away from the transition tube (12). A spring block (151) is provided on the side wall of the tail connector (15).

9. The vertebral body expander according to claim 8, characterized in that, The supporting body includes a connector (51), a first supporting member (52), and a second supporting member (53). One end of the connector (51) is sleeved on the tail connector (15). The first supporting member (52) and the second supporting member (53) are both connected to the end of the connector (51) away from the tail connector (15). The first supporting member (52) and the second supporting member (53) are arranged opposite to each other.

10. The vertebral body spreader according to any one of claims 1 to 9, characterized in that, It also includes a positioning handle (4), which is disposed on one side of the sleeve (1).

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