Medical orthopedic minimally invasive bone grafting thruster

Abstract

The present invention relates to a medical orthopedic minimally invasive bone grafting pusher, comprising a handle and a conveying unit arranged at the front end of the handle, the conveying unit comprising a propulsion shaft and a connecting sleeve, the connecting sleeve being movably arranged at the front end of the handle connecting portion, one end of the propulsion shaft being located inside the handle and connected to a transmission unit, and the other end thereof extending through the handle to the inside of the connecting sleeve and connected to a push block. By arranging the transmission unit and the conveying unit, the present invention only needs to squeeze the grip plate once to push the bone block into the joint or the deeper part of the bone grafting, which is convenient to use and reduces the workload of medical workers, and at the same time has low manufacturing cost, does not affect the surgical effect, and is convenient for large-scale market promotion and application.

Description

Technical Field

[0001] The invention relates to the field of medical auxiliary equipment, and in particular to a medical orthopedic minimally invasive bone grafting thruster. Background Art

[0002] Bone grafting is generally used for fracture nonunion, bone defects caused by various reasons, and intervertebral fusion bone grafting. During the operation, bone blocks need to be delivered to the part where bone grafting is needed to promote bone healing. At present, with the development of minimally invasive technology, the increase of arthroscopic and endoscopic disc surgery, many scholars carry out surgery with the assistance of minimally invasive sheaths. For example, the patent document with the publication number of CN104000641B discloses "A shoulder joint bone grafting device under minimally invasive conditions", which mainly includes a sheath, a guide needle and an inner core. When used, the guide needle needs to be inserted and pulled out twice, which is cumbersome to operate. The inner core is 120mm long, which is too long and inconvenient for surgical operation. In addition, long-term holding can easily cause wrist fatigue of medical workers, affecting the effect of the operation. In addition, in intervertebral fusion bone grafting surgery under endoscopic disc, expensive artificial intervertebral fusion devices are currently used to implant the intervertebral space. If a medical orthopedic minimally invasive bone grafting propeller can be used to implant autologous iliac bone blocks into the intervertebral space, the purpose of intervertebral fusion can be achieved, which is the same as the effect of the fusion device, and the medical burden of patients can be reduced. Summary of the invention

[0003] The invention solves the problem of difficulty in minimally invasive bone grafting and provides a medical orthopedic minimally invasive bone grafting thruster which is easy to use and can implant bone blocks at one time.

[0004] In order to achieve the above object, the technical solution of the present invention is:

[0005] A medical orthopedic minimally invasive bone grafting pusher includes a handle and a conveying unit arranged at the front end of the handle, the handle includes an integrally formed connecting part and a hand-held part, the conveying unit includes a propulsion shaft and an internal hollow connecting sleeve, the connecting sleeve is movably arranged at the front end of the handle connecting part, one end of the propulsion shaft is located at the rear end inside the handle connecting part and is connected to the transmission unit, and the other end thereof passes through the handle and extends to the interior of the connecting sleeve and is connected to a push block.

[0006] Furthermore, the connecting sleeve includes an integrally formed large diameter section and a small diameter section, and the push block is located in the small diameter section of the connecting sleeve; an arc portion is provided on the outer periphery of the end of the large diameter section of the connecting sleeve, and a step-shaped notch matching the arc portion is provided on the front end surface of the handle connecting portion, and the number of the arc portion and the notch are both two.

[0007] Furthermore, the transmission unit includes a grip plate and a connecting rod, which are located inside the hand-holding portion of the handle, one end of the grip plate is rotatably connected to the handle via a first pin, and one end of the connecting rod is rotatably connected to the handle via a second pin, the first pin is located at the top of the hand-holding portion of the handle, and the second pin is located in the middle of the hand-holding portion of the handle.

[0008] Furthermore, one end of the propulsion shaft located at the rear end of the handle connecting part is bent downward to form a bending part, and the bending part contacts the other end of the connecting rod; a spring is sleeved on the part of the propulsion shaft close to the bending part, one end of the spring is connected to the handle connecting part, and the other end is connected to the bending part of the propulsion shaft.

[0009] Furthermore, the wall thickness of the small diameter section of the connecting sleeve is 1 mm, its cross section is elliptical, and the end of the small diameter section of the connecting sleeve away from the large diameter section is cut at a 45° angle.

[0010] Furthermore, a circular hole is axially arranged at the center of the front end surface of the handle connecting portion, and the propulsion shaft passes through the circular hole.

[0011] Furthermore, a long groove for passing a suture is provided at the end of the large diameter section of the connecting sleeve, and the width of the long groove is 1.2 to 1.5 mm.

[0012] Furthermore, a groove is provided in the middle between the grip portion of the handle and the grip plate.

[0013] Through the above technical solution, the beneficial effects of the present invention are:

[0014] 1. The present invention is provided with a transmission unit and a conveying unit. The bone block can be pushed into the bone defect of the shoulder joint by squeezing the grip plate once. It is easy to use, reduces the workload of medical workers, greatly shortens the operation time of arthroscopic minimally invasive surgery for habitual dislocation of the shoulder joint, reduces the occurrence of postoperative complications, and does not affect the surgical effect;

[0015] 2. The present invention can implant bone blocks into the intervertebral space through a minimally invasive channel, which reduces the medical burden on patients compared to previous intervertebral fusion bone grafting surgeries that use expensive artificial intervertebral fusion devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the medical orthopedic minimally invasive bone grafting thruster of the present invention;

[0017] Figure 2 It is a left view of the medical orthopedic minimally invasive bone grafting thruster of the present invention;

[0018] Figure 3 It is a schematic diagram of the handle connection part and the connection sleeve in the medical orthopedic minimally invasive bone grafting thruster of the present invention;

[0019] Figure 4 The invention is a minimally invasive bone grafting propeller for medical orthopedics Figure 1 Schematic cross-sectional view at CC in the middle;

[0020] Figure 5 This is a schematic diagram of the use state of the first embodiment of the medical orthopedic minimally invasive bone grafting thruster of the present invention;

[0021] Figure 6 It is a schematic diagram of the use state of the second embodiment of the medical orthopedic minimally invasive bone grafting thruster of the present invention.

[0022] The numbers in the accompanying drawings are: 1 is a handle, 101 is a notch, 102 is a round hole, 2 is a propulsion shaft, 3 is a connecting sleeve, 301 is an arc portion, 302 is a long groove, 4 is a push block, 5 is a grip plate, 6 is a connecting rod, 7 is a first pin shaft, 8 is a second pin shaft, 9 is a spring, 10 is a bone block, and 11 is a suture. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0024] Embodiment 1

[0025] like Figure 1 to Figure 4 As shown, a medical orthopedic minimally invasive bone grafting thruster comprises a handle 1 and a conveying unit arranged at the front end of the handle 1, the handle 1 comprises an integrally formed connecting portion and a hand-held portion, the conveying unit comprises a propulsion shaft 2 and an internally hollow connecting sleeve 3, the connecting sleeve 3 is movably arranged at the front end of the connecting portion of the handle 1, one end of the propulsion shaft 2 is located at the rear end inside the connecting portion of the handle 1 and is connected to a transmission unit, the other end thereof passes through the handle 1 and extends to the inside of the connecting sleeve 3 and is connected to a push block 4, and at the same time, a circular hole 102 is axially arranged at the center of the front end surface of the connecting portion of the handle 1, and the propulsion shaft 2 passes through the circular hole 102; the transmission unit comprises a grip plate 5 and a connecting rod 6, the grip plate 5 and the connecting rod 6 are located inside the hand-held portion of the handle 1, one end of the grip plate 5 is rotatably connected to the handle 1 through a first pin shaft 7, one end of the connecting rod 6 is rotatably connected to the handle 1 through a second pin shaft 8, the first pin shaft 7 is located at the top end of the hand-held portion of the handle 1, and the second pin shaft 8 is located in the middle of the hand-held portion of the handle 1.

[0026] In this embodiment, the connecting sleeve 3 includes an integrally formed large-diameter section and a small-diameter section, and the push block 4 is located at the small-diameter section of the connecting sleeve 3; an arc-shaped portion 301 is provided on the outer periphery of the end of the large-diameter section of the connecting sleeve 3, and a stepped notch 101 matching the arc-shaped portion 301 is provided on the front end surface of the connecting portion of the handle 1. The number of the arc-shaped portion 301 and the notch 101 are both two, and the notch 101 can be embedded and connected to the notch 101 to fix the handle 1 and the connecting sleeve 3. The fixation can be achieved by simply rotating clockwise, and the separation can be achieved by rotating counterclockwise, which is easy to use.

[0027] In this embodiment, the transmission unit includes a grip plate 5 and a connecting rod 6, which are located inside the handheld portion of the handle 1. One end of the grip plate 5 is rotatably connected to the handle 1 through a first pin shaft 7, and one end of the connecting rod 6 is rotatably connected to the handle 1 through a second pin shaft 8. The first pin shaft 7 is located at the top of the handheld portion of the handle 1, and the second pin shaft 8 is located in the middle of the handheld portion of the handle 1. Specifically, a groove is provided in the middle position between the handheld portion of the handle 1 and the grip plate 5, which is convenient for medical workers to operate; at the same time, one end of the propulsion shaft 2 located at the rear end of the connection portion of the handle 1 is bent downward to form a bending portion, and the bending portion contacts the other end of the connecting rod 6; a spring 9 is sleeved on the portion of the propulsion shaft 2 close to the bending portion, one end of the spring 9 is connected to the connection portion of the handle 1, and the other end thereof is connected to the bending portion of the propulsion shaft 2. When the grip plate 5 is squeezed, the connecting rod 6 drives the propulsion shaft 2 to push the push block 4 to slide forward and squeeze the spring 9. When the grip plate 5 is released, the propulsion shaft 2 is restored to its original position due to the elastic force of the spring 9.

[0028] Specifically, the wall thickness of the small diameter section of the connecting sleeve 3 is 1 mm, and its cross-section is elliptical. At the same time, the end of the small diameter section of the connecting sleeve 3 away from the large diameter section is cut at a 45° angle, which matches the position of the implanted bone block 10. In addition, in order to facilitate the passage of the line, a long groove 302 for the suture 11 to pass through is opened at the end of the large diameter section of the connecting sleeve 3, and the width of the long groove 302 is 1.2 to 1.5 mm.

[0029] like Figure 5 As shown, the steps of using the bone graft block 10 pusher of the present invention to perform shoulder joint bone grafting surgery are as follows:

[0030] 1. Select a bone block 10 of appropriate size. In actual operation, a suture 11 fixed with rivets is inserted on the upper and lower surfaces of the bone block 10;

[0031] 2. Place the bone block 10 in the connecting sleeve 3, ensure that the suture 11 passes through the gap between the push block 4 and the connecting sleeve 3, and the free end of the suture 11 passes through the connecting sleeve 3 and is pulled out from the long slot 302;

[0032] 3. Connect the connecting sleeve 3 and the handle 1 through the arc portion 301 and the notch 101 to complete the preparation work;

[0033] 4. The medical worker pulls the suture 11 with one hand and squeezes the grip plate 5 with the other hand to slowly push the bone block 10 into the bone defect of the shoulder joint. It should be noted that when pushing the bone block 10, the medical worker needs to tighten the pull line continuously to prevent the suture 11 from being entangled at the front end of the bone block 10;

[0034] 5. When half of the bone block 10 is exposed from the connecting sleeve 3, adjust the connecting sleeve 3 and rotate the connecting sleeve 3 if necessary to ensure that the bone block 10 matches the joint when it is fully exposed. Finally, pull out the connecting sleeve 3 to proceed to the next step of knotting the suture 11.

[0035] Embodiment 2:

[0036] like Figure 6 As shown, the difference between this embodiment and the first embodiment is that the steps of performing intervertebral fusion bone grafting surgery using the present invention are as follows:

[0037] 1. After selecting a bone block 10 of a suitable size, first place the bone block 10 in the connecting sleeve 3, and then connect the connecting sleeve 3 and the handle 1 through the arc portion 301 and the notch 101 to complete the preparation work;

[0038] 2. Squeeze the grip plate 5 to slowly push the bone block 10 into the intervertebral space. When half of the bone block 10 is exposed from the connecting sleeve 3, adjust the connecting sleeve 3 and rotate the connecting sleeve 3 if necessary to ensure that the bone block 10 is completely placed in the intervertebral space (with the cortical bone as the supporting side) when it is completely exposed. Then pull out the connecting sleeve 3, and finally use the pedicle screw rod to fix the vertebral body, thereby replacing the expensive artificial intervertebral fusion device and reducing the medical burden on the patient. In this embodiment, other specific implementation methods are the same as those in Example 1 and will not be repeated here.

[0039] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structure, features and principles of the patent scope of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A minimally invasive bone grafting thruster for medical orthopedics, characterized in that: The invention comprises a handle (1) and a conveying unit arranged at the front end of the handle (1), wherein the handle (1) comprises an integrally formed connecting portion and a hand-held portion, and the conveying unit comprises a propulsion shaft (2) and an internally hollow connecting sleeve (3), wherein the connecting sleeve (3) is movably arranged at the front end of the connecting portion of the handle (1), one end of the propulsion shaft (2) is located at the rear end of the connecting portion of the handle (1) and is connected to the transmission unit, and the other end thereof passes through the handle (1) and extends to the inside of the connecting sleeve (3) and is connected to a push block (4), and a gap is provided between the push block (4) and the connecting sleeve (3) to ensure that the suture (11) passes through; The connecting sleeve (3) comprises an integrally formed large-diameter section and a small-diameter section, and the push block (4) is located in the small-diameter section of the connecting sleeve (3); The cross section of the small diameter section of the connecting sleeve (3) is elliptical; The end of the large diameter section of the connecting sleeve (3) is provided with a long groove (302) for the suture (11) to pass through.

2. The medical orthopedic minimally invasive bone grafting thruster according to claim 1, characterized in that: An arc-shaped portion (301) is provided on the outer periphery of the end of the large diameter section of the connecting sleeve (3), and a step-shaped notch (101) matching the arc-shaped portion (301) is provided on the front end surface of the connecting portion of the handle (1), and the number of the arc-shaped portion (301) and the notch (101) are both two.

3. The medical orthopedic minimally invasive bone grafting thruster according to claim 1, characterized in that: The transmission unit comprises a grip plate (5) and a connecting rod (6), wherein the grip plate (5) and the connecting rod (6) are located inside a hand-held portion of the handle (1), one end of the grip plate (5) is rotatably connected to the handle (1) via a first pin shaft (7), and one end of the connecting rod (6) is rotatably connected to the handle (1) via a second pin shaft (8), wherein the first pin shaft (7) is located at the top end of the hand-held portion of the handle (1), and the second pin shaft (8) is located in the middle of the hand-held portion of the handle (1).

4. The medical orthopedic minimally invasive bone grafting thruster according to claim 1, characterized in that: One end of the propulsion shaft (2) located at the rear end of the connection portion of the handle (1) is bent downward to form a bent portion, and the bent portion is in contact with the other end of the connecting rod (6); a spring (9) is sleeved on a portion of the propulsion shaft (2) close to the bent portion, one end of the spring (9) is connected to the connection portion of the handle (1), and the other end of the spring (9) is connected to the bent portion of the propulsion shaft (2).

5. The medical orthopedic minimally invasive bone grafting thruster according to claim 2, characterized in that: The wall thickness of the small diameter section of the connecting sleeve (3) is 1 mm, and the end of the small diameter section of the connecting sleeve (3) away from the large diameter section is cut at a 45° angle.

6. The medical orthopedic minimally invasive bone grafting thruster according to claim 1, characterized in that: A circular hole (102) is axially arranged at the centre of the front end surface of the connection portion of the handle (1), and the propulsion shaft (2) passes through the circular hole (102).

7. The medical orthopedic minimally invasive bone grafting thruster according to claim 1, characterized in that: The width of the long groove (302) is 1.2-1.5 mm.

8. The medical orthopedic minimally invasive bone grafting thruster according to claim 1, characterized in that: A groove is provided in the middle between the handholding portion of the handle (1) and the grip plate (5).

Images