Bone cement injection assembly for spine

Abstract

The bone cement injection assembly comprises a bone cement injection piece, a conveying guide pipe and a bone cement injection piece, wherein the conveying guide pipe is connected to the bone cement injection piece and used for conveying bone cement, and the bone cement injection piece is connected to the end, away from the bone cement injection piece, of the conveying guide pipe. The bone cement injection part comprises a fixing rod with the interior of a hollow structure, a plurality of sets of fixing rotary blades which are arranged on the fixing rod and are of a spiral structure, a conveying hole site formed in the fixing rod and a conical drill arranged at the end of the fixing rod. Through the specific structural design of the bone cement injection part, a self-stabilizing positioning structure is formed, through the design of a plurality of conveying hole sites, regular conveying of bone cement at different heights is achieved, the bone cement is conveyed into the bone cement injection part through a conveying guide pipe, and after the bone cement is injected, the bone cement permeates into a vertebral body through the conveying hole sites; and the symptom of osteoporosis of a patient is relieved while the fixing force of the screw is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a bone cement injection component for a spine. Background Art

[0002] The rapid development of modern society has changed the way of life and production. More and more people work in front of computer desks for a long time. In addition, incorrect sitting posture leads to long-term high pressure of cervical and lumbar joints, premature loss of water in vertebral structure, osteoporosis, bone structure degeneration and other spinal diseases. For scoliosis, vertebral collapse, intervertebral bulge and other diseases, spinal internal fixation screws have become indispensable medical devices. However, common internal fixation screws have insufficient fixation force on the vertebral body, and the patient may have osteoporosis, which often leads to complications such as screw loosening and screw slippage after surgery, leading to secondary surgery. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a bone cement injection assembly for the spine.

[0004] The utility model solves the above technical problems with the following technical solutions: A bone cement injection assembly for the spine, comprising a bone cement injection piece, a delivery catheter connected to the bone cement injection piece and used for delivering bone cement, and a bone cement injection piece connected to the end of the delivery catheter away from the bone cement injection piece;

[0005] The bone cement injection piece includes a fixing rod with a hollow structure inside, a plurality of fixing vanes in a spiral structure arranged on the fixing rod, a delivery hole opened on the fixing rod, and a conical drill arranged at the end of the fixing rod. A joint is arranged at the end of the fixing rod away from the conical drill, and the delivery catheter is detachably connected to the joint.

[0006] Furthermore, the conveying hole is located on the fixed rod between adjacent fixed rotor blades.

[0007] Furthermore, a plurality of positioning holes are provided on the fixing rod, and the diameter of the positioning holes is smaller than the diameter of the conveying hole.

[0008] Furthermore, the delivery catheter includes a connecting tube and a locking head and a threaded connecting head respectively arranged at both ends of the connecting tube, the locking head is connected to the bone cement injection piece, and the threaded connecting head is threadedly connected to the threaded hole of the joint.

[0009] Furthermore, a connecting bolt is arranged on the positioning head, and the connecting bolt is connected to the bone cement injection piece.

[0010] Furthermore, the bone cement injection part adopts a syringe.

[0011] The utility model has the following beneficial effects: the bone cement injection assembly for the spine provided by the utility model forms a self-stabilizing positioning structure through the specific structural design of the bone cement injection piece, realizes the regular delivery of bone cement at different heights through the design of multiple delivery holes, delivers bone cement to the inside of the bone cement injection piece through the delivery catheter, and after the bone cement is injected, the bone cement can penetrate into the inside of the vertebral body through the delivery holes, thereby enhancing the screw fixing force and relieving the patient's osteoporosis symptoms. In addition, through multiple positioning holes, the human body's own bone can adhere to the bone cement injection piece, thereby improving the fixing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the bone cement injection piece in the utility model;

[0014] Figure 3 This is a schematic diagram of the structure of the delivery catheter in the utility model;

[0015] Figures 1 to 3 The reference numerals shown in the figure represent respectively: 1-bone cement injection part, 2-delivery catheter, 3-bone cement injection part, 10-fixing rod, 11-fixing rotor, 12-delivery hole, 13-conical drill, 14-connector, 15-positioning hole, 20-connecting tube, 21-locking head, 22-threaded connector, 23-connecting bolt. DETAILED DESCRIPTION

[0016] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0017] like Figure 1 As shown, a bone cement injection assembly for spine includes a bone cement injection piece 1, a delivery catheter 2 connected to the bone cement injection piece 1 and used for bone cement delivery, and a bone cement injection piece 3 connected to the end of the delivery catheter 2 away from the bone cement injection piece 1, and the bone cement injection piece 3 is a syringe. The bone cement injection piece 1 is made by 3D printing, and has a frosted rough surface, which is conducive to the immediate stabilization effect after insertion.

[0018] like Figure 2As shown, the bone cement injection piece 1 includes a fixing rod 10 with a hollow structure inside, a plurality of fixing blades 11 arranged on the fixing rod 10 and in a spiral structure, a delivery hole 12 opened on the fixing rod 10, and a conical drill 13 arranged at the end of the fixing rod 10, and the delivery hole 12 is located on the fixing rod 10 between adjacent fixing blades 11. A joint 14 is provided at the end of the fixing rod 10 away from the conical drill 13, and the delivery catheter 2 is detachably connected to the joint 14. Through the specific structural design of the bone cement injection piece 1, a self-stabilizing positioning structure is formed. Through the design of multiple delivery holes 12, regular delivery of bone cement at different heights is achieved. Bone cement is delivered to the inside of the bone cement injection piece 1 through the delivery catheter 2. After the bone cement is injected, the bone cement can penetrate into the vertebral body through the delivery hole 12, thereby enhancing the screw fixing force and relieving the patient's osteoporosis symptoms. The fixing blade 11 effectively increases the rotational contact area with the vertebral body to prevent displacement or dislocation. The fixing rod 10 is also provided with a plurality of positioning holes 15, the diameter of which is smaller than the diameter of the delivery hole 12. Through the plurality of positioning holes 15, the human body's own bone can adhere to the bone cement injection piece 1, thereby improving the fixing effect.

[0019] like Figure 3 As shown, the delivery catheter 2 includes a connecting tube 20 and a locking head 21 and a threaded connecting head 22 respectively arranged at both ends of the connecting tube 20. The locking head 21 is provided with a connecting bolt 23, which is connected to the bone cement injection piece 3, and the threaded connecting head 22 is threadedly connected to the threaded hole of the joint 14.

[0020] When in use, conventional surgical instruments are used to place the bone cement injection piece 1 into the desired position inside the vertebral body, and then the delivery catheter 2 is threadedly connected to the joint 14 of the bone cement injection piece 1. The bone cement is stirred evenly, connected to the delivery catheter 2 through the bone cement injection system, and the bone cement is injected into the body. At this time, the bone cement of the bone cement injection piece 1 infiltrates into the vertebral body in multiple directions, and the delivery catheter 2 is removed to complete the remaining surgical steps.

[0021] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A bone cement injection assembly for spine, characterized in that: It comprises a bone cement injection piece (1), a delivery catheter (2) connected to the bone cement injection piece (1) and used for delivering bone cement, and a bone cement injection piece (3) connected to the end of the delivery catheter (2) away from the bone cement injection piece (1); The bone cement injection piece (1) comprises a fixing rod (10) with a hollow structure inside, a plurality of fixing vanes (11) arranged on the fixing rod (10) and having a spiral structure, a delivery hole (12) opened on the fixing rod (10), and a conical drill (13) arranged at the end of the fixing rod (10), a joint (14) is arranged at the end of the fixing rod (10) away from the conical drill (13), and the delivery catheter (2) is detachably connected to the joint (14).

2. The spinal bone cement injection assembly according to claim 1, characterized in that: The conveying hole (12) is located on the fixed rod (10) between adjacent fixed rotating blades (11).

3. The spinal bone cement injection assembly according to claim 1 or 2, characterized in that: The fixing rod (10) is also provided with a plurality of positioning holes (15), and the diameter of the positioning holes (15) is smaller than the diameter of the conveying hole (12).

4. The spinal bone cement injection assembly according to claim 1, characterized in that: The delivery catheter (2) comprises a connecting tube (20) and a positioning head (21) and a threaded connecting head (22) respectively arranged at two ends of the connecting tube (20); the positioning head (21) is connected to the bone cement injection piece (3), and the threaded connecting head (22) is threadedly connected to the threaded hole of the joint (14).

5. The spinal bone cement injection assembly according to claim 4, characterized in that: The locking head (21) is provided with a connecting bolt (23), and the connecting bolt (23) is connected to the bone cement injection piece (3).

6. The spinal bone cement injection assembly according to claim 1, characterized in that: The bone cement injection piece (3) is a syringe.

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