A directional bone grafting aid

Abstract

The application belongs to the technical field of medical devices and discloses a directional bone grafting auxiliary device which comprises a fixing tube, a conical cylinder and a moving rod, the bottom end of the fixing tube is provided with a receiving cavity, the receiving cavity is provided with a moving ring, the inner wall of the moving ring is provided with a plurality of elastic films, the top end of a connecting sheet on the moving ring is provided with a thread which is in threaded connection with a thread sleeve on the fixing tube, a plurality of oblique tooth grooves are formed in the moving rod, a moving sleeve is arranged on the moving rod, a clamping plate and an elastic sheet are arranged in the moving sleeve, the bottom end of the clamping plate is clamped in the oblique tooth groove, a sliding block on the moving sleeve is arranged in a sliding groove on a rotating handle, and one end of the rotating handle is hinged to the conical cylinder. The bottom end of the fixing tube is closed by the elastic films, the thread sleeve is rotated, the elastic films are stored in the receiving cavity, the opening is opened, and bone particles are directionally delivered; the rotating handle is pressed, the moving sleeve unidirectionally drives the moving rod to move downward, bone particles are continuously pushed out of the fixing tube, and pressing is used instead of knocking, which is more convenient and labor-saving.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a targeted bone grafting auxiliary device. Background Technology

[0002] In orthopedics, bone grafting surgery primarily involves transplanting bone particles, such as autologous bone, allogeneic bone, or artificial bone, to the area of ​​bone loss in a patient for repair. During the procedure, to ensure the targeted delivery of bone particles to the bone loss site, medical staff typically use a bone graft funnel. The procedure generally involves inserting the funnel into the surgical area, positioning its bottom end at the bone loss site, and then using forceps to pick up bone particles and place them into the funnel's end. Because traditional bone graft funnels lack a protective bottom, if bone particles are pre-filled into the funnel, they rely solely on friction between themselves to maintain their position. When the funnel is placed into the surgical area, some bone particles can easily leak out from the bottom end, hindering proper targeted delivery. In the bone grafting area, medical staff also need to clean up any leaked bone particles. Furthermore, with traditional bone grafting funnels, as medical staff use tools like pushers to inject and compress the bone particles, the particles may become stuck and accumulate inside the funnel's delivery tube. This requires the use of tools like surgical hammers to tap and move the particles to the grafting area. This bone grafting process is time-consuming, labor-intensive, and prone to causing the funnel to shift. Therefore, there is an urgent need for a directional bone grafting auxiliary device to address the problems of premature bone particle leakage during delivery, leading to poor directional delivery, and the need for tapping during bone grafting, which can cause displacement, is time-consuming, labor-intensive, and inconvenient to use, thereby improving the efficiency of medical staff's operations. Summary of the Invention

[0003] The present invention aims to provide a directional bone grafting auxiliary device to solve the problems of poor directional delivery effect of the current bone graft funnel and the time-consuming and labor-intensive use.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A directional bone grafting auxiliary device includes a fixation tube, a cone, and a moving rod. The top end of the fixation tube is connected to the bottom end of the cone. A receiving cavity is formed at the bottom end of the fixation tube, and a moving ring is disposed within the receiving cavity. The bottom end of the moving ring extends out of the receiving cavity and is located at the opening at the bottom end of the fixation tube. Multiple sets of elastic sheets are disposed on the inner wall of the moving ring, sealing the opening at the bottom end of the fixation tube. A connecting piece is disposed on the moving ring, slidingly passing through the wall of the fixation tube. The top end of the connecting piece is threaded and engages with a threaded sleeve. On the fixed tube; the moving rod passes through the cone and is installed inside the fixed tube. The moving rod has multiple sets of oblique tooth grooves. The moving rod is covered with a moving sleeve. Inside the moving sleeve, two sets of clamping plates and spring pieces are respectively arranged opposite each other. The spring pieces contact one side of the clamping plate. The bottom end of the clamping plate is locked in one of the oblique tooth grooves. Two sets of sliding blocks are arranged opposite each other on the moving sleeve. The sliding blocks are slidably arranged in the sliding groove. The sliding groove is opened on the rotating handle. One end of the rotating handle is hinged to the cone. A fixed handle is provided on the cone. The fixed handle is located directly below the rotating handle.

[0006] Furthermore, a lever is provided at the top of the card plate, with the top of the lever protruding beyond the top surface of the movable sleeve. A limit block is provided on the movable sleeve, with the limit block passing through a limit groove, which is opened on the movable rod.

[0007] Furthermore, a spring plate is provided at the hinge between the cone and the rotating handle, and the spring plate contacts the bottom surface of the rotating handle. Multiple sets of finger rings are provided on the bottom surface of the fixed handle.

[0008] Furthermore, a fixing ring is provided on the cone, and a soft rubber ring is provided on the bottom surface of the fixing ring. The moving rod passes through the fixing ring and the soft rubber ring. The soft rubber ring is funnel-shaped, and its bottom inner wall is in contact with the surface of the moving rod.

[0009] Furthermore, the fixed tube is made of transparent material, while the moving rod is made of opaque material.

[0010] Furthermore, the bottom of the fixing tube is cut at an angle, and scale lines are set on the surface of the fixing tube.

[0011] The principles and beneficial effects of the technical solution are as follows:

[0012] This invention provides a directional bone grafting auxiliary device. Bone particles are filled into a fixation tube via a conical cylinder. After the bone particles are filled, the bottom end of the fixation tube is sealed by elastic plates on a moving ring, thus preventing leakage of the bone particles during insertion into the surgical area. After the bottom end of the fixation tube is placed in the bone grafting area, medical personnel only need to rotate the threaded sleeve on the fixation tube. Under the threaded transmission, the connecting piece pulls the moving ring into the receiving cavity. At this time, each elastic plate moves synchronously with the moving ring, and is deformed by the pressure of the bottom edge of the fixation tube. The movable ring is retracted into the receiving cavity, releasing the seal on the bottom opening of the fixation tube, thereby releasing the bone particles out of the fixation tube and filling the bone graft area, achieving directional delivery of the bone graft. When pushing the bone particles, medical staff only need to repeatedly press and rotate the handle. Under the action of the spring and the clamping plate, the movable sleeve drives the movable rod downward in one direction, continuously pushing the bone particles out of the fixation tube. Pressing the handle increases the lever arm, eliminating the need for medical staff to use surgical hammers or other tools for striking, avoiding displacement caused by striking, and saving the strength of medical staff, making the device more convenient and labor-saving to use. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a directional bone grafting auxiliary device according to the present invention;

[0014] Figure 2 This is a schematic diagram of the assembly structure of a directional bone grafting auxiliary device according to the present invention;

[0015] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0016] Figure 4 for Figure 2 Enlarged view of point B in the middle;

[0017] Figure 5 This is a partial cross-sectional view of the rotating handle and the movable sleeve in a directional bone grafting auxiliary device of the present invention.

[0018] Figure 6 This is a cross-sectional view of the fixed tube in a closed state in a directional bone grafting auxiliary device of the present invention.

[0019] Figure 7 This is a cross-sectional view of the bottom opening of the fixation tube in the directional bone grafting auxiliary device of the present invention.

[0020] Figure 8 This is a schematic diagram of the directional bone grafting auxiliary device of the present invention in the loading state;

[0021] The corresponding labels in the attached diagram are named as follows: 1. Fixed tube; 101. Scale line; 2. Conical cylinder; 201. Fixed ring; 202. Soft rubber ring; 3. Moving rod; 301. Inclined tooth groove; 302. Limiting groove; 4. Rotating handle; 401. Spring plate; 402. Slide groove; 5. Fixed handle; 501. Finger ring; 6. Moving ring; 601. Elastic soft sheet; 602. Connecting piece; 603. Storage cavity; 604. Threaded sleeve; 7. Moving sleeve; 701. Clamping plate; 702. Spring piece; 703. Paddle; 704. Limiting block; 705. Sliding block. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0023] like Figures 1-8 As shown, a directional bone grafting auxiliary device includes a fixation tube 1, a cone 2, and a moving rod 3. The top end of the fixation tube 1 is connected to the bottom end of the cone 2 via a thread. The fixation tube 1 is a disposable consumable, packaged in an independent aseptic package. A receiving cavity 603 is formed inside the bottom wall of the fixation tube 1, and a moving ring 6 is disposed inside the receiving cavity 603. The bottom end of the moving ring 6 extends out of the receiving cavity 603 and is located at the bottom opening of the fixation tube 1. Multiple sets of elastic sheets 601 are disposed on the inner wall of the moving ring 6. The elastic sheets 601 are resistant to external forces. Under the action of force, it can deform. The force causing the deformation is greater than the force on the supporting bone particles, so that after the fixation tube 1 is filled with bone particles, the elastic soft sheet 601 will not deform under the compression of the bone particles. The elastic soft sheet 601 closes the bottom opening of the fixation tube 1. The moving ring 6 is provided with a connecting piece 602, which slides through the vertical groove in the wall of the fixation tube 1. The connecting piece 602 can only continue to move along the axial direction of the fixation tube 1 and cannot rotate. The top of the connecting piece 602 is provided with threads. Furthermore, it engages with the threaded sleeve 604, which is fitted onto the fixed tube 1. The threaded sleeve 604 can only rotate on the fixed tube 1 and cannot move. The moving rod 3 passes through the tapered cylinder 2 and is inserted into the fixed tube 1. The moving rod 3 has multiple sets of helical toothed grooves 301. The moving rod 3 is fitted with a moving sleeve 7, and two sets of clamping plates 701 and spring pieces 702 are respectively arranged opposite each other inside the moving sleeve 7. The spring piece 702 contacts one side of the clamping plate 701, and the bottom end of the clamping plate 701 is engaged with one of the helical toothed grooves 301. Inside, two sets of sliding blocks 705 are arranged opposite each other on the movable sleeve 7. The sliding blocks 705 can rotate on the movable sleeve 7. The sliding blocks 705 are slidably arranged in the slide groove 402. The slide groove 402 is opened on the rotating handle 4, so that the movable sleeve 7 is located in the middle of the rotating handle 4 and only moves vertically with the rotating handle 4, always keeping coaxial with the movable rod 3. One end of the rotating handle 4 is hinged to the cone 2. A fixed handle 5 is provided on the cone 2. The fixed handle 5 is located directly below the rotating handle 4.

[0024] In use, firstly, remove the disposable fixation tube 1 from the sterile packaging bag and connect it to the cone 2. At this time, the device is in the pre-filling state. Medical staff can easily fill the bone particles into the fixation tube 1 through the cone 2. After filling, rotate the handle 4 so that it is directly above the fixation handle 5. Insert the moving rod 3 through the moving sleeve 7 into the cone 2 and the fixation tube 1, so that it contacts the bone particles and completes the pre-filling. Place the fixation tube 1 into the surgical area. Under the action of the elastic soft film 601, the opening at the bottom of the fixation tube 1 is closed, and there will be no premature leakage of bone particles. When the fixation tube 1 is inserted... When the device is in place and its bottom opening is located in the bone graft area, medical staff only need to rotate the threaded sleeve 604. This drives the connecting piece 602 upwards via threaded transmission, causing the moving ring 6 to move into the receiving cavity 603. At this time, each elastic soft piece 601 moves synchronously with the moving ring 6, and is compressed by the bottom edge of the fixing tube 1, causing deformation. It rotates until it is parallel to the axis of the fixing tube 1, and is then received into the receiving cavity 603 along with the moving ring 6, releasing the seal on the bottom opening of the fixing tube 1. This releases the bone particles from the fixing tube 1, effectively preventing bone particles from leaking into non-graft areas and improving the device's directional delivery efficiency. For better results, when pushing bone particles, medical staff only need to hold the fixed handle 5 and the rotating handle 4, and press the rotating handle 4 repeatedly. When the rotating handle 4 rotates towards the fixed handle 5, it drives the moving sleeve 7 to move downward. Under the action of the spring piece 702, the bottom end of the locking plate 701 on the moving sleeve 7 is always locked in the oblique tooth groove 301 on the moving rod 3, so that the moving rod 3 moves downward synchronously with the moving sleeve 7, pushing the bone particles out of the fixed tube 1. When the rotating handle 4 is rotated upward, the moving sleeve 7 also moves upward synchronously. Since the locking plate 701 is set at an angle and has the same angle as the oblique tooth groove 301, it locks the bone particles out of the fixed tube 1. Plate 701 separates from the oblique tooth groove 301, no longer applying force to the moving rod 3, preventing the moving rod 3 from moving upward. Pressing and rotating handle 4 again causes plate 701 to re-engage with oblique tooth groove 301, thus achieving unidirectional transmission. This allows medical staff to repeatedly press and rotate handle 4, causing the moving rod 3 to move downward, gradually pushing the bone particles out of the fixing tube 1. Rotating handle 4 increases the lever arm, making it easier for medical staff to press down and move the moving rod 3 step by step, saving effort and eliminating the need for tools such as surgical hammers to strike, thus preventing device displacement and making the device more convenient, time-saving, and labor-saving to use.

[0025] In this embodiment, a lever 703 is provided at the top of the locking plate 701, with the top of the lever 703 protruding beyond the top surface of the movable sleeve 7. A limiting block 704 is provided on the movable sleeve 7, and the limiting block 704 passes through the limiting groove 302, which is formed on the movable rod 3. When it is necessary to lift the movable rod 3 to separate it from the movable sleeve 7, medical staff only need to move the lever 703 to rotate the locking plate 701, thereby separating it from the oblique tooth groove 301 and releasing the one-way locking of the movable rod 3. This allows medical staff to lift the movable rod 3 upwards to remove it, facilitating subsequent use and cleaning / disinfection. The limiting block 704 and the limiting groove 302 restrict the movable rod 3, preventing it from rotating and ensuring that the locking plate 701 is always aligned with the oblique tooth groove 301, facilitating engagement and improving the stability of the device.

[0026] In this embodiment, a spring plate 401 is provided at the hinge point between the cone 2 and the rotating handle 4. The spring plate 401 contacts the bottom surface of the rotating handle 4, and multiple sets of finger rings 501 are provided on the bottom surface of the fixed handle 5. When the rotating handle 4 is pressed, the rotating handle 4 compresses the spring plate 401, causing it to deform. When the rotating handle 4 is released, the spring plate 401 returns to its original shape, causing the rotating handle 4 to rotate automatically, eliminating the need for medical personnel to manually rotate it, making it convenient for repeated pressing operations. When medical personnel hold the device, their fingers can pass through the finger rings 501 to increase the stability of the hand and prevent slippage.

[0027] In this embodiment, a fixing ring 201 is provided on the cone cylinder 2, and a soft rubber ring 202 is provided on the bottom surface of the fixing ring 201. The moving rod 3 passes through the fixing ring 201 and the soft rubber ring 202. The soft rubber ring 202 is funnel-shaped, and its bottom inner wall is in contact with the surface of the moving rod 3. The funnel-shaped soft rubber ring 202 can provide a certain resistance, allowing the moving rod 3 to move downward easily. When the moving sleeve 7 moves upward, the moving rod 3 is resisted by the soft rubber ring 202 and will not move upward easily, thus avoiding reducing the pushing stroke of the moving rod 3 each time and making the device operate more reliably.

[0028] In this embodiment, the fixation tube 1 is made of transparent material, while the moving rod 3 is made of opaque material. The transparent fixation tube 1 allows medical staff to observe the bone particles inside, facilitating their operation. The opaque moving rod 3 provides a clear contrast within the transparent fixation tube 1, making it easy for medical staff to observe.

[0029] In this embodiment, the bottom end of the fixation tube 1 is obliquely cut, and the surface of the fixation tube 1 is provided with scale lines 101. The surface of the elastic film 601 is marked with bright colors. The oblique opening allows the fixation tube 1 to be inserted into narrow bone sutures for better bone particle delivery; the scale lines 101 make it convenient for medical staff to observe the delivery volume and delivery speed; the bright colors allow medical staff to quickly observe whether the elastic film 601 has fallen off after deformation, avoiding foreign body intrusion.

[0030] In another embodiment, for surgeries with a small amount of bone graft filling, the delivery of bone particles is easier due to the smaller amount of bone particles. There is no need to use the rotating handle 4 on the cone 2 to increase the lever arm. The fixation tube 1 can be used in conjunction with the moving rod 3, which can simplify the operation steps, reduce the use of tools, and reduce the workload of postoperative cleaning and disinfection.

[0031] The above descriptions are merely embodiments of the present invention, and common knowledge regarding specific technical solutions or characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A directional bone grafting auxiliary device, characterized in that: The device includes a fixed tube (1), a cone (2), and a moving rod (3). The top end of the fixed tube (1) is connected to the bottom end of the cone (2). A receiving cavity (603) is opened at the bottom end of the fixed tube (1). A moving ring (6) is provided inside the receiving cavity (603). The bottom end of the moving ring (6) extends out of the receiving cavity (603) and is located at the bottom opening of the fixed tube (1). Multiple sets of elastic soft sheets (601) are provided on the inner wall of the moving ring (6). The elastic soft sheets (601) close the bottom opening of the fixed tube (1). A connecting piece (602) is provided on the moving ring (6). The connecting piece (602) slides through the tube wall of the fixed tube (1). The top end of the connecting piece (602) is provided with a thread and is threadedly engaged with a threaded sleeve (604). The threaded sleeve (604) is fitted on the fixed tube (1). The moving rod... (3) After passing through the cone (2), it is inserted into the fixed tube (1). The moving rod (3) has multiple sets of oblique tooth grooves (301). The moving rod (3) is fitted with a moving sleeve (7). Two sets of clamping plates (701) and spring pieces (702) are respectively arranged opposite to each other in the moving sleeve (7). The spring piece (702) contacts one side of the clamping plate (701). The bottom end of the clamping plate (701) is clamped in one of the oblique tooth grooves (301). Two sets of sliding blocks (705) are arranged opposite to each other on the moving sleeve (7). The sliding blocks (705) are slidably arranged in the sliding groove (402). The sliding groove (402) is opened on the rotating handle (4). One end of the rotating handle (4) is hinged to the cone (2). A fixed handle (5) is provided on the cone (2). The fixed handle (5) is located directly below the rotating handle (4).

2. The directional bone grafting auxiliary device according to claim 1, characterized in that: The top of the card plate (701) is provided with a paddle (703), the top of the paddle (703) protrudes out of the top surface of the movable sleeve (7), the movable sleeve (7) is provided with a limit block (704), the limit block (704) is inserted in the limit groove (302), and the limit groove (302) is opened on the movable rod (3).

3. The directional bone grafting auxiliary device according to claim 1, characterized in that: A spring plate (401) is provided at the hinge of the cone (2) and the rotating handle (4). The spring plate (401) is in contact with the bottom surface of the rotating handle (4). Multiple sets of finger rings (501) are provided on the bottom surface of the fixed handle (5).

4. The directional bone grafting auxiliary device according to claim 1, characterized in that: A fixing ring (201) is provided on the cone (2), and a soft rubber ring (202) is provided on the bottom surface of the fixing ring (201). The moving rod (3) passes through the fixing ring (201) and the soft rubber ring (202). The soft rubber ring (202) is funnel-shaped, and its bottom inner wall is in contact with the surface of the moving rod (3).

5. The directional bone grafting auxiliary device according to claim 1, characterized in that: The fixed tube (1) is made of transparent material, and the moving rod (3) is made of non-transparent material.

6. The directional bone grafting auxiliary device according to claim 5, characterized in that: The bottom end of the fixing tube (1) is obliquely cut, and the surface of the fixing tube (1) is provided with scale lines (101).

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