Bone cement injection device and vacuum blending and defoaming device

Abstract

The utility model discloses a bone cement injection device and vacuum mixing deaeration device relates to medical instrument technical field, including mixing deaeration subassembly and injection subassembly, mixing deaeration subassembly includes barrel body, first seal cover and second seal cover, first seal cover and second seal cover detachable screw joint at the both ends of barrel body, the first sealing cover is provided with an air hole communicated with the inner cavity of the cylinder body. The injection assembly comprises a cylinder body, a piston and a screw rod, the piston slides in the inner cavity, and the screw rod is rotated to enable the piston to move so as to extrude materials outside. The vacuum mixing and defoaming device is provided with a rotating disc, the rotating disc is in vacuum, and the mixing and defoaming assembly is placed in a bin on the rotating disc to conduct mixing and defoaming procedures. After defoaming is completed, the first sealing cover and the second sealing cover are separated from the cylinder body, the piston and the screw rod are installed to form the injection assembly, the materials stay in the cylinder body after defoaming is completed, the materials can be injected by directly installing the piston and the screw rod, it is guaranteed that the materials are uniform and free of bubbles during injection, and the strength and stability of the bone cement are improved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a bone cement injection device and a vacuum mixing and degassing device. Background Technology

[0002] Bone cement, also known as bone filler, is a biomaterial used in orthopedic surgery, particularly in vertebroplasty and kyphoplasty. The main component of bone cement is polymethyl methacrylate (PMMA), a polymer with good biocompatibility and mechanical properties. During surgery, bone cement is typically mixed and stirred with initiators and activators to form PMMA. However, stirring the bone cement is a critical step because it affects the homogeneity of the material and the final curing effect. Manual stirring can introduce air bubbles, which may form defects during curing, affecting the strength and stability of the bone cement. Furthermore, current surgical procedures all rely on manual stirring, which is cumbersome, inefficient, and inconvenient to use. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a bone cement injection device and a vacuum mixing and degassing device, which can improve operational convenience and testing efficiency.

[0004] The bone cement injection device according to a first aspect embodiment of the present invention includes:

[0005] The mixing and degassing assembly includes a cylinder body, a first cap and a second cap. The first cap and the second cap are detachably screwed to both ends of the cylinder body. The first cap has a vent hole that communicates with the inner cavity of the cylinder body.

[0006] The injection assembly includes a barrel, a piston, and a screw. The piston slides within the inner cavity, and the screw is threaded to one end of the barrel. The piston is screwed to the end of the screw. Rotating the screw allows the piston to move to inject material.

[0007] After the degassing process is completed, the first and second caps can be detached from the barrel, and a piston and screw are installed on the barrel to form an injection assembly.

[0008] The bone cement injection device according to the first aspect of this utility model has at least the following beneficial effects: This embodiment includes a mixing and degassing component and an injection component. The mixing and degassing component includes a cylinder body, a first cap, and a second cap. The first cap and the second cap are detachably screwed to both ends of the cylinder body. The first cap has a vent hole communicating with the inner cavity of the cylinder body. The injection component includes a cylinder body, a piston, and a screw. The piston slides within the inner cavity, and the screw is threadedly connected to one end of the cylinder body. The piston is screwed to the end of the screw. Rotating the screw can move the piston to expel the material to the outside. After the degassing process is completed, the first cap and the second cap can be detached from the cylinder body, and the piston and screw are installed on the cylinder body to form the injection component. During the degassing process, air bubbles in the material can be removed, and after degassing, the material remains inside the cylinder body. Directly installing the piston and screw to achieve the step of injecting material can ensure that the material is uniform and free of air bubbles during injection, thereby improving the strength and stability of the bone cement.

[0009] According to an embodiment of the first aspect of the present invention, the cylinder body includes a first end and a second end, and both the first cap and the screw can be installed at the first end.

[0010] According to an embodiment of the first aspect of the present invention, the injection assembly is provided with a mounting member, which is screwed onto the first end of the barrel and threadedly connected to the screw.

[0011] According to an embodiment of the first aspect of the present invention, a sealing ring is provided on the radial outer wall of the piston, and the outer wall of the sealing ring abuts against the radial inner wall of the cylinder.

[0012] According to an embodiment of the first aspect of the present invention, the injection assembly further includes an injection tube screwed onto the second end.

[0013] According to an embodiment of the first aspect of the present invention, the two ends of the injection tube are provided with a first connector and a second connector, the second connector is located at the end opposite to the tube body, and the second connector is provided with a fastening element.

[0014] According to an embodiment of the first aspect of the present invention, a handle is provided at one end of the screw away from the cylinder body, and the length direction of the handle extends along the radial direction of the screw.

[0015] According to a second aspect of the present invention, a vacuum mixing and degassing device is provided, applied to the aforementioned bone cement injection device. It includes:

[0016] The housing has a receiving cavity, inside which is a turntable. The turntable has several compartments arranged at intervals along its circumference, and the compartments are used to place the mixing and degassing components.

[0017] The vacuum pump is located inside the enclosure;

[0018] The semi-finished product is placed inside the mixing and degassing component. The turntable can rotate inside the cavity, and the vacuum pump can evacuate the cavity to achieve the mixing and degassing process of the semi-finished product.

[0019] The vacuum mixing and degassing apparatus according to the second aspect of the present invention has at least the following beneficial effects:

[0020] The vacuum mixing and degassing device has a receiving cavity with a turntable inside. The turntable has compartments for preventing mixing and degassing components. When the turntable rotates, a vacuum pump evacuates the receiving cavity to achieve the degassing process. After degassing, the first and second caps can detach from the cylinder body, and a piston and screw are installed on the cylinder body to form an injection assembly. During the degassing process, air bubbles in the material can be removed, and after degassing, the material remains in the cylinder body. Directly installing the piston and screw can realize the step of injecting the material, which can ensure that the material is uniform and free of air bubbles during injection, thereby improving the strength and stability of the bone cement.

[0021] According to an embodiment of the second aspect of the present invention, when the mixing and degassing component is placed in the compartment, the first end is located at the top of the compartment.

[0022] According to an embodiment of the second aspect of the present invention, the axial direction of the compartment is inclined to the vertical direction, and when the mixing and degassing component is placed in the compartment, the second end is farther away from the rotation axis of the turntable than the first end.

[0023] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0025] Figure 1 This is a perspective view of the mixing and degassing component in the first aspect of the present invention;

[0026] Figure 2 This is a perspective view of the injection assembly in an embodiment of the first aspect of the present invention;

[0027] Figure 3 This is a cross-sectional view of the injection assembly in an embodiment of the first aspect of the present invention;

[0028] Figure 4 for Figure 3 A magnified view of A in the middle;

[0029] Figure 5 This is a schematic diagram of the vacuum mixing and degassing device in the second aspect of this utility model.

[0030] Figure label:

[0031] Mixing and degassing assembly 100; cylinder body 101; first end 102; second end 103; vent hole 104; inner cavity 105; first cap 106; second cap 107;

[0032] Injection assembly 110; screw 111; handle 112; piston 113; sealing ring 114; mounting component 115; injection tube 116; first connector 117; second connector 118; fastener 119;

[0033] Vacuum mixing and degassing device 120; box 121; accommodating cavity 122; turntable 123; compartment 124; vacuum pump 125. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0035] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0037] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0038] Reference Figure 1The bone cement injection device according to a first aspect of this utility model includes a mixing and degassing component 100 and an injection component 110. The mixing and degassing component 100 includes a cylinder 101, a first cap 106, and a second cap 107. The first cap 106 and the second cap 107 are detachably screwed onto both ends of the cylinder 101. The first cap 106 has a vent hole 104 communicating with the inner cavity 105 of the cylinder 101. It is understood that the cylinder 101 has an inner cavity 105, in which an initiator and activator of bone cement are placed. During the degassing process, the first cap 106 and the second cap 107 are screwed onto both ends of the cylinder 101 to mix and degas the bone cement. It is understood that the vent hole 104 can expel air from the inner cavity 105 during the degassing process and provides a channel for the discharge of air bubbles overflowing from the bone cement, thus realizing the degassing process.

[0039] Reference Figure 2 and Figure 3 The injection assembly 110 includes a barrel 101, a piston 113, and a screw 111. The piston 113 slides within the inner cavity 105. The screw 111 is threadedly connected to one end of the barrel 101, and the piston 113 is screwed to the end of the screw 111. Rotating the screw 111 causes the piston 113 to move away from the screw 111, extruding the material to the outside. After the degassing process is completed, the first cap 106 and the second cap 107 can detach from the barrel 101, and the piston 113 and screw 111 are installed on the barrel 101 to form the injection assembly 110. After degassing, the material remains inside the barrel 101. Directly installing the piston 113 and screw 111 enables the injection of material, ensuring that the material is uniform and free of air bubbles during injection, thus improving the strength and stability of the bone cement.

[0040] Specifically, the cylinder body 101 includes a first end 102 and a second end 103. The first cap 106 and the screw 111 can both be installed on the first end 102. It can be understood that during the degassing process, the first end 102 with the first cap 106 is placed upwards, and air can be discharged through the vent hole 104 on the first cap 106 to achieve degassing. After degassing, the degassed bone cement remains in the inner cavity 105. The first cap 106 is removed, and a piston 113 is placed on the first end 102 into the inner cavity 105. The piston 113 is connected to the end of the screw 111, and the screw 111 is pushed into the inner cavity 105 and threadedly connected to the first end 102. When the screw 111 is rotated, the piston 113 can move towards the second end 103, thereby extruding the degassed bone cement.

[0041] Understandably, the injection assembly 110 is provided with a mounting member 115. After the first cap 106 is removed, the mounting member 115 can be threadedly connected to the first end 102 of the barrel 101. The mounting member 115 is threadedly connected to the screw 111, thereby installing the screw 111. Understandably, the end of the screw 111 facing away from the barrel 101 is provided with a handle 112. The length direction of the handle 112 extends along the radial direction of the screw 111, which allows for convenient manual rotation of the screw 111 to carry out the injection process.

[0042] Understandably, referring to Figure 4 A sealing ring 114 is provided on the radial outer wall of the piston 113. The outer wall of the sealing ring 114 abuts against the radial inner wall of the cylinder 101. Furthermore, sealing rings 114 are provided at both ends of the piston 113 in the axial direction. The sealing rings 114 are O-rings with an O-shaped cross section to prevent leakage and ensure a smooth injection process.

[0043] Understandably, the injection assembly 110 also includes an injection tube 116, which is screwed onto the second end 103. Further, the injection tube 116 has a first connector 117 and a second connector 118 at both ends. The first connector 117 is fixed to the second end 103 by a threaded connection. A flexible tube is provided between the first connector 117 and the second connector 118. The second connector 118 is located at the end opposite to the barrel body 101. Understandably, the second connector 118 has a fastening element 119 that extends outward along the radial direction of the second connector 118, enabling it to be fastened to other devices for flexible use in different scenarios.

[0044] Reference Figure 5 In a second aspect of this utility model, a vacuum mixing and degassing device 120 is provided, applied to the aforementioned bone cement injection device. It includes a housing 121 with a receiving cavity 122. A turntable 123 is located within the receiving cavity 122, and the turntable 123 has several compartments 124 arranged circumferentially on it. The compartments 124 are used to hold the mixing and degassing assembly 100. Simultaneously, a vacuum pump 125 is provided within the housing 121 for evacuating the receiving cavity 122. Understandably, the mixing and degassing component 100 contains a semi-finished product made of a mixture of activator and initiator. The mixing and degassing component 100 is placed in the compartment 124 of the turntable 123. The vacuum pump 125 extracts the air from the accommodating cavity 122, so that the mixing and degassing component 100 is in a vacuum environment. At the same time, the turntable 123 rotates to centrifuge and mix the semi-finished product. During this process, the semi-finished product will be uniformly mixed, and the bubbles in the liquid will overflow and be discharged to the outside through the vent hole 104 on the first cap 106.

[0045] Understandably, when the mixing and degassing component 100 is placed in the compartment 124, the first end 102 is located at the top of the compartment 124, facilitating the upward discharge of air from the inner cavity 105. Furthermore, the axis of the compartment 124 is inclined vertically, and the second end 103 is further away from the rotation axis of the turntable 123 than the first end 102. This ensures that the first end 102 is positioned at the top when the mixing and degassing component 100 is placed in the compartment 124; additionally, the inclined center of gravity axis of the compartment 124 allows the axis of the cylinder 101 to be inclined vertically, which is beneficial for improving the uniformity of mixing and the degassing effect, thereby enhancing the degassing efficiency. Understandably, since the first end 102 faces upward during the degassing process, the degassed bone cement is located below the cylinder body 101. After the mixing and degassing component 100 is taken out from the compartment 124, a screw is installed at the first end 102 and an injection tube 116 is installed at the second end 103, so that the bone cement in a bubble-free state can be injected directly, making the operation simple and quick.

[0046] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A bone cement injection device, characterized in that, include: A mixing and degassing assembly includes a cylinder body, a first cap, and a second cap. The first cap and the second cap are detachably screwed to both ends of the cylinder body. The first cap is provided with a vent hole that communicates with the inner cavity of the cylinder body. An injection assembly includes a barrel, a piston, and a screw. The piston slides within the inner cavity, and the screw is threaded to one end of the barrel. The piston is screwed to the end of the screw. Rotating the screw allows the piston to move to inject material. After the degassing process is completed, the first cap and the second cap can be detached from the cylinder body, and the piston and the screw are installed on the cylinder body to form the injection assembly.

2. The bone cement injection device according to claim 1, characterized in that, The cylinder body includes a first end and a second end, and both the first cap and the screw can be installed on the first end.

3. The bone cement injection device according to claim 2, characterized in that, The injection assembly is provided with a mounting component, which is screwed onto the first end of the cylinder body and threadedly connected to the screw.

4. The bone cement injection device according to claim 2, characterized in that, The injection assembly is provided with a mounting component, which is screwed onto the first end of the cylinder body and threadedly connected to the screw.

5. The bone cement injection device according to claim 2, characterized in that, The injection assembly also includes an injection tube screwed onto the second end.

6. The bone cement injection device according to claim 5, characterized in that, The injection tube is provided with a first connector and a second connector at both ends. The second connector is located at the end opposite to the tube body and is provided with a fastening element.

7. The bone cement injection device according to claim 1, characterized in that, A handle is provided at one end of the screw opposite to the cylinder body, and the length direction of the handle extends along the radial direction of the screw.

8. A vacuum mixing and degassing device, characterized in that, A bone cement injection device according to any one of claims 1 to 7, the bone cement injection device comprising a mixing and degassing assembly, the mixing and degassing assembly comprising a cylinder body, a first cap, and a second cap, the cylinder body comprising a first end and a second end, wherein the device comprises: The housing has a receiving cavity, and a turntable is provided inside the receiving cavity. The turntable has a number of compartments arranged at intervals along its circumference, and the compartments are used to place the mixing and degassing component. A vacuum pump is located inside the housing; The mixing and degassing assembly contains a semi-finished product, the turntable can rotate within the accommodating cavity, and the vacuum pump can evacuate the accommodating cavity to achieve the mixing and degassing process of the semi-finished product.

9. The vacuum mixing and degassing apparatus according to claim 8, characterized in that, When the mixing and degassing component is placed in the compartment, the first end is located at the top of the compartment.

10. The vacuum mixing and degassing apparatus according to claim 8, characterized in that, The axial direction of the compartment is inclined to the vertical direction, and when the mixing and degassing component is placed in the compartment, the second end is farther away from the rotation axis of the turntable than the first end.

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