Vertebral cancellous bone compactor

Abstract

The utility model belongs to the technical field of medical instruments, and relates to a centrum cancellous bone compactor which comprises a box body, a knob and an outer sleeve, the knob and the outer sleeve are arranged at the upper end and the lower end of the box body, a sliding block is arranged in the box body, one end of the sliding block is in threaded connection with the knob, and the other end of the sliding block is connected with an inner sleeve arranged in the outer sleeve in a sleeved mode. The sliding block is arranged in the box body in a sliding mode and can move up and down in the box body under the action of the rotary knob so as to drive the inner sleeve to move up and down in the outer sleeve, the end, away from the sliding block, of the inner sleeve is provided with an opening part, and the end of the outer sleeve is provided with a check block and an opening groove which are matched with the opening part. The utility model discloses can compact the cancellous bone of the centrum, enlarge the volume of the cavity in the centrum, can inject more bone cement, increase the intensity of centrum, has simple structure, stable reliable, lower cost, convenient to use, no leakage risk, etc.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of medical apparatus and instruments, and particularly relates to a vertebral body cancellous bone compactor. BACKGROUND

[0002] Percutaneous vertebroplasty (PVP) and percutaneous kyphoplasty (PKP) are mainly used for treating new type minimally invasive surgery of osteoporotic vertebral fracture. The percutaneous kyphoplasty (PKP) is injected into the vertebral body through the balloon expansion, and the improvement degree of kyphotic deformity is better, but the cost is higher, the pressure is higher when the balloon is expanded, and if the bone spur is broken when the balloon is expanded, the balloon liquid will leak into the body, affecting the operation progress. CONTENT

[0003] The utility model discloses a vertebral body cancellous bone compactor which is simple in structure, stable and reliable, easy to use, low in cost and free of leakage risk and is used for percutaneous vertebroplasty (PVP).

[0004] To achieve the above object, the utility model adopts the technical scheme of a vertebral body cancellous bone compactor which comprises a box body, knobs and outer sleeve tubes arranged at the upper and lower ends of the box body, a sliding block arranged in the box body, one end of the sliding block being threadedly connected with the knob, the other end of the sliding block being connected with an inner sleeve tube which is sleeved in the outer sleeve tube, a strutting part being arranged at the end of the inner sleeve tube away from the sliding block, and a stop block and a strutting groove being arranged at the end of the outer sleeve tube.

[0005] Preferably, the sliding block is slidably arranged in the box body and can move up and down in the box body under the action of the knob, so as to drive the inner sleeve tube to move up and down in the outer sleeve tube.

[0006] Preferably, the inner sleeve tube is coaxially arranged with the outer sleeve tube.

[0007] Preferably, a compaction head is arranged at the end of the outer sleeve tube away from the box body, and the outer edge of the compaction head is designed in an arc shape.

[0008] Preferably, the stop block is arranged in the compaction head.

[0009] Preferably, the strutting part comprises two symmetrically arranged strutting pieces, and the end of each strutting piece close to the stop block is provided with a supporting block.

[0010] Preferably, two strutting grooves are arranged on the side wall of the outer sleeve tube in a left-right symmetrical manner and above the stop block.

[0011] After the above technical scheme is adopted, the vertebral body cancellous bone compactor has the following beneficial effects:

[0012] The structure design of the utility model can compact the vertebral body cancellous bone, expand the cavity volume in the vertebral body, inject more bone cement, increase the strength of the vertebral body, has the advantages of simple structure, stable and reliable, low cost, convenient to use, no leakage risk and the like. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 It is the structure explosion schematic view of the vertebral body cancellous bone compactor of the utility model;

[0014] Fig. 2 It is the structure schematic view of the vertebral body cancellous bone compactor of the utility model;

[0015] Fig. 3 It is the open state schematic view of the vertebral body cancellous bone compactor of the utility model.

[0016] Among them: box body 1, knob 2, outer sleeve 3, slider 4, inner sleeve 5, open part 6, stop block 7, open slot 8, compacting head 9. DETAILED DESCRIPTION

[0017] The utility model will be further clearly and completely described below in combination with the drawings and specific embodiments, obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative, but not as any limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the utility model.

[0018] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and furthermore, it should be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or their combination.

[0019] The foregoing description, for purposes of explanation, sets forth specific values and arrangements of components and steps that are subject to many options. The intent is to be accurate in describing the principles and novel features of the application. Thus, although the application has been described with reference to specific embodiments thereof, it will be apparent to those of ordinary skill in the art that a number of changes can be made to the embodiments described without departing from the spirit and scope of the application. For example, the various features of the application can be combined in any combination, where possible. Accordingly, the scope of the application is to be construed as encompassing modifications and variations of the specific examples described herein, subject only to the conditions of the prior art.

[0020] In the description of the present application, it needs to be understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship is usually based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0021] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawings is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the example term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative description used herein is interpreted accordingly.

[0022] In addition, it needs to be explained that the use of "first", "second" and the like to limit parts only for the convenience of distinguishing the corresponding parts, and if there is no further declaration, the above words have no special meaning, therefore, it cannot be understood as a limitation on the scope of protection of the present application.

[0023] This utility model relates to a vertebral cancellous bone compactor, such as... Figs. 1-3 As shown, the device includes a housing 1, a knob 2 and an outer sleeve 3 disposed at the upper and lower ends of the housing 1, and a slider 4 disposed inside the housing 1. One end of the slider 4 is threadedly connected to the knob 2, and the other end is connected to an inner sleeve 5 fitted inside the outer sleeve 3. Specifically, the slider 4 is slidably disposed inside the housing 1 and can move up and down within the housing 1 under the action of the knob 2, thereby driving the inner sleeve 5 to move up and down within the outer sleeve 3. The inner sleeve 5 is coaxially disposed with the outer sleeve 3 and is located away from the slider. One end of the outer tube 3 is provided with a support portion 6, and the end of the outer tube 3 is provided with a stop block 7 and a support groove 8 that cooperate with the support portion 6. Specifically, the end of the outer tube 3 away from the box body 1 is provided with a compaction head 9. The outer edge of the compaction head 9 is designed in an arc shape. The stop block 7 is located inside the compaction head 9. The support portion 6 includes two symmetrically arranged support pieces. The end of the support piece near the stop block 7 has a support block. There are two support grooves 8, which are symmetrically distributed on the side wall of the outer tube 3 and located above the stop block 7.

[0024] When using this vertebral cancellous bone compactor, rotating the knob 2 in both directions moves the slider 4 up and down within the housing 1. When the slider 4 moves the inner sleeve 5 downwards, causing the end support blocks of the two spreading plates of the spreading part 6 to contact the internal stop block 7 of the compaction head 9, the two spreading plates spread outwards along the spreading groove 8, resulting in the following state after spreading: Fig. 3 As shown, the cancellous bone is compressed by the expanded spring sheet; at this time, rotating the knob 2 in the opposite direction can restore the expanded sheet to its initial state; and by continuously rotating the knob 2 in both directions, the expanded part 6 is continuously expanded and retracted, thus obtaining the cavity for injecting bone cement into the vertebral body.

[0025] In summary, the vertebral cancellous bone compactor provided by this utility model is used in percutaneous vertebroplasty (PVP). Its main function is to compact the vertebral cancellous bone through the channel, thereby expanding the cavity volume within the vertebral body, allowing for the injection of more bone cement, and increasing the strength of the vertebral body. It has the advantages of simple structure, stability and reliability, low cost, convenient use, and no risk of leakage, and has great market value, making it worthy of widespread promotion and application.

[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A cancellous vertebral body compactor, characterized by: The utility model relates to a box body (1) and the rotary knob (2) and the outer sleeve (3) of setting on the upper and lower ends of box body (1), the box body (1) inside is provided with slider (4), one end of slider (4) is connected with rotary knob (2) threadedly, the other end is connected with the inner sleeve (5) of setting in the outer sleeve (3) inside, the inner sleeve (5) is provided with the support open portion (6) away from slider (4) one end, the end of outer sleeve (3) is provided with the stopper (7) and the support open groove (8) with support open portion (6) cooperation.

2. A cancellous bone compactor according to claim 1 wherein: The slider (4) is slidably arranged in the box body (1) and can move up and down in the box body (1) under the action of the rotary knob (2), thereby driving the inner sleeve (5) to move up and down.

3. A cancellous bone compactor according to claim 1 wherein: The inner sleeve (5) is coaxially arranged with the outer sleeve (3).

4. A cancellous bone compactor according to claim 1 wherein: The outer sleeve (3) is provided with a compacting head (9) away from the box body (1), and the outer edge of the compacting head (9) is designed in a circular arc shape.

5. A cancellous bone compactor according to claim 4, wherein: The stopper (7) is arranged inside the compacting head (9).

6. A cancellous bone compactor according to claim 1 wherein: The support open portion (6) includes two symmetrically arranged support open pieces, and the end of each support open piece close to the stopper (7) is provided with a support block.

7. A cancellous bone compactor according to claim 6, wherein: The support open groove (8) is provided with two symmetrically arranged grooves on the side wall of the outer sleeve (3) and above the stopper (7).

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