Bone cement injection anchor

Abstract

The utility model discloses a bone cement injection anchor, and relates to the technical field of medical auxiliary equipment. According to the utility model, through lifting of the positioning column, dismounting of the anchor nail is facilitated, and furthermore, under the action of the positioning column, the situation that the fixing plate and the anchor nail are not easy to pull out or fall off to cause failure of an operation can be avoided; by changing the position of the adjusting column in the positioning seat, the height positions of the sealing gasket and the piston in the medicine storage pipe can be changed, the bone cement storage amount in the medicine storage pipe can be controlled under the action of the sealing gasket, namely, the purpose of controlling the injection amount can be achieved, and after adjustment is completed, the fixing ring, the movable column and the piston at the lower end of the movable column move downwards firstly, and then the injection amount is controlled. The bone cement can be guided into the medicine storage tube through the medicine conveying tube by moving the bone cement upwards, the bone cement in the medicine storage tube can be discharged by moving the bone cement downwards after medicine guiding is completed, the bone cement in the medicine storage tube can be prevented from flowing out of the medicine conveying tube under the action of the one-way valve, and the medicine injection effect can be guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of medical auxiliary equipment technology, specifically to a bone cement injection anchor. Background Technology

[0002] PVP, commonly known as "bone cement," is chemically named polyvinylpyrrolidone (PVP). It is a high-performance, widely used water-soluble polymer compound, belonging to the category of high-tech, high-value-added fine chemical products, and is an important internationally recognized chemical and pharmaceutical intermediate. PVP has extensive applications in medicine, being one of the three major new pharmaceutical excipients advocated internationally. Its most widespread use is as a binder for tablets and granules. PVP can also be used as a glidant in capsules, a detoxifying and lubricating agent in eye drops, a solubilizer in injections, a dispersant in liquid preparations, and a stabilizer for enzymes and heat-sensitive drugs. PVP can also be combined with iodine to synthesize PVP-I disinfectant. In contact lenses, PVP, as a component in contact with the eye, can increase its hydrophilicity. Bone cement also has some drawbacks, such as the occasional high pressure within the bone marrow cavity during filling, which can cause fat droplets to enter blood vessels and cause embolism.

[0003] In clinical practice, anchor pull-out or detachment often occurs, leading to surgical failure. Moreover, the success rate of revision surgery after such failure is very low. Therefore, we propose a bone cement injection anchor. Utility Model Content

[0004] The purpose of this utility model is to provide a bone cement injection anchor to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0006] A bone cement injection anchor, comprising:

[0007] A fixing plate, the lower end of which is fitted with a plurality of fan-shaped anchors; a medicine storage tube is disposed inside the fixing plate, and a medicine delivery tube is installed on the input side of the medicine storage tube; it also includes,

[0008] An injection mechanism includes a positioning seat detachably mounted above the drug reservoir tube. An adjusting column is installed at the center of the upper end of the positioning seat. A sealing gasket is installed at the lower end of the adjusting column. A piston is detachably mounted at the lower end of the sealing gasket. Multiple movable columns are arranged symmetrically in a circle at the upper end of the piston. A fixing ring is fitted onto the circumferential surface of the upper end of each movable column.

[0009] Furthermore, two symmetrically arranged positioning posts are installed at the upper end of the fixing plate.

[0010] Furthermore, a connecting seat is installed on the circumferential surface of the upper end of the medicine storage tube, and a connecting groove is opened at the lower end of the positioning seat, with the connecting seat and the connecting groove being interference fit.

[0011] Furthermore, a threaded post is installed at the upper end of the sealing gasket, and a threaded hole is opened at the lower end of the adjusting post. The adjusting post and the threaded post are connected by threads.

[0012] Furthermore, a connecting block is installed at the upper end of the piston, and a connecting groove is opened at the lower end of the sealing gasket, with the connecting block installed in the connecting groove.

[0013] Furthermore, the positioning seat has an internal thread at its center, and the adjusting column has an external thread on its circumferential surface. The adjusting column and the positioning seat are connected by a thread.

[0014] Furthermore, a connecting plate is installed between two adjacent fixing rings.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. This utility model can fix the installation stability of the plate under the action of the anchor, that is, it can realize the installation stability of the internal drug storage tube and injection mechanism. The anchor can be disassembled by lifting the positioning column. Furthermore, the positioning column can prevent the fixing plate and anchor from being difficult to pull out or falling off, which could lead to surgical failure.

[0017] 2. This utility model can change the height of the sealing gasket and piston inside the drug storage tube by changing the position of the adjusting column inside the positioning seat. Under the action of the sealing gasket, the amount of bone cement stored inside the drug storage tube can be controlled, thus achieving the purpose of controlling the injection volume. After the adjustment is completed, the fixing ring, the moving column and the piston at its lower end are moved down first, and then moved up, so that the bone cement can be introduced into the drug storage tube through the drug delivery tube. After the drug is introduced, it is moved down again, so that the bone cement inside the drug storage tube can be discharged. Under the action of the one-way valve, the bone cement inside the drug storage tube can be prevented from flowing out of the drug delivery tube, thus ensuring the effect of drug injection. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0019] Figure 2 This is a front sectional view of the present invention;

[0020] Figure 3 This is a three-dimensional schematic diagram of the injection mechanism in this utility model;

[0021] Figure 4 This is a three-dimensional schematic diagram showing the positional relationship between the drug storage tube and the drug delivery tube in this utility model.

[0022] Reference numerals in the attached drawings: 1. Fixing plate; 2. Anchor nail; 3. Positioning column; 4. Drug storage tube; 5. Drug delivery tube; 6. Connecting seat; 7. Injection mechanism; 701. Positioning seat; 702. Adjusting column; 703. Sealing gasket; 704. Piston; 705. Moving column; 706. Fixing ring; 707. Connecting plate. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0024] Please see Figure 1 - Figure 4 This utility model provides a bone cement injection anchor, comprising:

[0025] The fixed plate 1 has multiple fan-shaped anchors 2 installed at its lower end. The fixed plate 1 has a medicine storage tube 4 inside, and a medicine delivery tube 5 is installed on the input side of the medicine storage tube 4.

[0026] The fixing plate 1 ensures the installation stability of the anchor pin 2, and the anchor pin 2 also ensures the installation stability of the fixing plate 1, thus achieving the installation stability of the internal drug storage tube 4 and injection mechanism 7. The lifting of the positioning column 3 facilitates the disassembly of the anchor pin 2. Furthermore, the positioning column 3 prevents the fixing plate 1 and anchor pin 2 from being difficult to pull out or falling off, which could lead to surgical failure. The drug storage tube 4 enables the storage of drugs, and the infusion tube 5 allows drugs to be injected into the drug storage tube 4. The infusion tube 5 is equipped with a one-way valve on its input side, which ensures that the infusion tube 5 only has the function of drug delivery.

[0027] It also includes,

[0028] The injection mechanism 7 includes a positioning seat 701 detachably mounted above the drug storage tube 4. An adjusting column 702 is installed at the center of the upper end of the positioning seat 701. A sealing gasket 703 is installed at the lower end of the adjusting column 702. A piston 704 is detachably mounted at the lower end of the sealing gasket 703. Multiple moving columns 705 are symmetrically arranged in a circle at the upper end of the piston 704. A retaining ring 706 is fitted onto the circumferential surface of the upper end of each moving column 705.

[0029] The positioning seat 701 ensures the installation stability of the adjusting column 702, the adjusting column 702 ensures the installation stability of the sealing gasket 703, the sealing gasket 703 ensures the installation stability of the moving column 705, the moving column 705 ensures the installation stability of the piston 704, and the fixing ring 706 ensures the installation stability of the upper end of the moving column 705. The circumferential surface of the adjusting column 702 has a moving groove, and the fixing ring 706 forms a movable connection with the adjusting column 702 through the moving groove. By changing the position of the adjusting column 702 inside the positioning seat 701... The position can change the height of the sealing gasket 703 and piston 704 inside the drug storage tube 4. Under the action of the sealing gasket 703, the amount of bone cement stored inside the drug storage tube 4 can be controlled, that is, the purpose of controlling the injection volume can be achieved. After the adjustment is completed, the fixing ring 706, the moving column 705 and the piston 704 at its lower end are first moved down and then moved up, which can introduce bone cement into the drug storage tube 4 through the drug delivery tube 5. After the drug is introduced, it is moved down again, which can make the bone cement inside the drug storage tube 4 discharged. Under the action of the one-way valve, the bone cement inside the drug storage tube 4 can be prevented from flowing out of the drug delivery tube 5, thus ensuring the effect of drug injection.

[0030] In this embodiment, preferably, two symmetrically arranged positioning columns 3 are installed on the upper end of the fixing plate 1; the fixing plate 1 can ensure the installation stability of the positioning columns 3, and the positioning columns 3 can achieve the purpose of moving the fixing plate 1.

[0031] In this embodiment, preferably, a connecting seat 6 is installed on the circumferential surface of the upper end of the drug storage tube 4, and a connecting groove is opened at the lower end of the positioning seat 701. The connecting seat 6 and the connecting groove are interference-fitted. Under the action of the drug storage tube 4, the installation stability of the connecting seat 6 can be guaranteed, and under the action of the connecting groove, the connection stability between the connecting seat 6 and the positioning seat 701 can be guaranteed.

[0032] In this embodiment, preferably, a threaded post is installed at the upper end of the sealing gasket 703, and a threaded hole is opened at the lower end of the adjusting post 702. The adjusting post 702 and the threaded post are connected by threads. Under the action of the threaded post, the connection stability between the sealing gasket 703 and the adjusting post 702 can be guaranteed, and the sealing gasket 703 and the adjusting post 702 can be separated for easy assembly and installation.

[0033] In this embodiment, preferably, a connecting block is installed on the upper end of the piston 704, and a connecting groove is opened on the lower end of the sealing gasket 703, with the connecting block installed in the connecting groove; the connecting groove can ensure the installation stability of the connecting block, and the cooperation between the connecting block and the connecting groove can ensure the connection fit between the upper end of the sealing gasket 703 and the piston 704.

[0034] In this embodiment, preferably, the center of the positioning seat 701 is provided with an internal thread, and the circumferential surface of the adjusting column 702 is provided with an external thread. The adjusting column 702 and the positioning seat 701 are connected by threads. The threaded connection can ensure the connection stability between the positioning seat 701 and the adjusting column 702, and can achieve the purpose of positioning and fixing the adjusting column 702 at different positions.

[0035] In this embodiment, preferably, a connecting plate 707 is installed between two adjacent fixing rings 706; the connecting plate 707 can ensure the connection stability of the two adjacent fixing rings 706.

[0036] The working principle and usage process of this utility model are as follows: When in use, the fixing plate 1 ensures the installation stability of the anchor pin 2, and the anchor pin 2 also ensures the installation stability of the internal drug storage tube 4 and injection mechanism 7. The lifting of the positioning column 3 facilitates the disassembly of the anchor pin 2. Furthermore, the positioning column 3 prevents the fixing plate 1 and anchor pin 2 from being difficult to pull out or falling off, which could lead to surgical failure. The drug storage tube 4 enables drug storage, and the infusion tube 5 allows drug to be injected into it. A one-way valve is installed on the inlet side of the infusion tube 5, ensuring that the infusion tube 5 only has one check valve. The function of drug delivery: By changing the position of the adjusting column 702 inside the positioning seat 701, the height position of the sealing gasket 703 and the piston 704 inside the drug storage tube 4 can be changed. Under the action of the sealing gasket 703, the amount of bone cement stored inside the drug storage tube 4 can be controlled, that is, the purpose of controlling the injection volume can be achieved. After the adjustment is completed, the fixing ring 706, the moving column 705 and the piston 704 at its lower end are moved down first, and then moved up, so that the bone cement can be introduced into the drug storage tube 4 through the drug delivery tube 5. After the drug introduction is completed, it is moved down again, so that the bone cement inside the drug storage tube 4 can be discharged. Under the action of the one-way valve, the bone cement inside the drug storage tube 4 can be prevented from flowing out of the drug delivery tube 5, thus ensuring the effect of drug delivery.

[0037] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A bone cement injection anchor, characterized in that, The utility model relates to a kind of medicine injection device, including: Fixed plate (1), the lower end of the fixed plate (1) is equipped with multiple anchor nails (2) arranged in fan shape, the inside of the fixed plate (1) is equipped with medicine storage pipe (4), the input side of the medicine storage pipe (4) is equipped with medicine delivery pipe (5);Further Including, Injection mechanism (7), the positioning seat (701) of the injection mechanism (7) is detachably installed above the medicine storage pipe (4), the center of the upper end of the positioning seat (701) is equipped with adjusting column (702), the lower end of the adjusting column (702) is equipped with sealing pad (703), the lower end of the sealing pad (703) is detachably equipped with piston (704), the upper end of the piston (704) is equipped with multiple movable columns (705) arranged in circumferential symmetry, the circumferential surface of the upper end of each movable column (705) is sleeved with fixed ring (706).

2. A bone cement injection anchor according to claim 1, characterized in that: The upper end of the fixed plate (1) is equipped with two positioning columns (3) arranged symmetrically.

3. A cement injection anchor according to claim 1, characterized in that: The circumferential surface of the upper end of the medicine storage pipe (4) is equipped with connecting seat (6), the lower end of the positioning seat (701) is provided with connecting groove, and the connecting seat (6) and connecting groove are interference fit.

4. A cement injection anchor according to claim 1, characterized in that: The upper end of the sealing pad (703) is equipped with threaded column, the lower end of the adjusting column (702) is provided with threaded hole, and the adjusting column (702) and threaded column are connected by thread.

5. A cement injection anchor according to claim 1, characterized in that: The upper end of the piston (704) is equipped with connecting block, and the lower end of the sealing pad (703) is provided with connecting groove, and connecting block is installed in connecting groove.

6. A cement injection anchor according to claim 1, characterized in that: The center of the positioning seat (701) is provided with internal thread, the circumferential surface of the adjusting column (702) is provided with external thread, and the adjusting column (702) and the positioning seat (701) are connected by thread.

7. A cement injection anchor according to claim 1, wherein: Connecting plate (707) is installed between two adjacent fixed rings (706).

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