Proximal humeral internal support system

Abstract

The utility model relates to a proximal humerus internal support system, including steel sheet, the both ends of steel sheet are equipped with a plurality of up and down locking screws, are equipped with humerus distance support column in the middle part of steel sheet, humerus distance support column is large -diameter sleeve type hollow cylinder, the front end of humerus distance support column is flat -headed type structure, humerus distance support column rear end and middle part screw hole are between the type connection of clamping groove, be equipped with upper inclined thread on humerus distance support column rear end inner hole wall, the upper end surface of humerus distance support column is provided with the groove hole with its inner cavity hole intercommunication, still be equipped with anti -rotation auxiliary nail, anti -rotation auxiliary nail passes into from humerus distance support column rear end inner hole and from its upper end surface groove hole and humerus distance support column constitute cross -type connection structure, the utility model has enough stable support, the number of screw on steel sheet greatly reduces, and steel sheet length also greatly shortens, reduces surgical incision, simple operation, the structure design is reasonable, and the treatment effect is obvious.

Description

Technical Field

[0001] This utility model relates to a proximal humeral internal support system, belonging to the field of medical device technology. Background Technology

[0002] Proximal humeral fractures are a common type of fracture. Current surgical treatments generally employ intramedullary nailing and dynamic cross-plate fixation systems, such as "ZL202121747584.0, humeral intramedullary nail" and "ZL201620242216.3, a three-dimensional cross-interlocking locking internal fixator for fractures." However, these existing technologies have many structural design flaws. In pursuit of cross-locking and support stability between screws, not only is the number of screws large, but the operation time is also long, and screw perforation or extrusion is prone to occur during and after the operation. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a proximal humeral internal support system with a reasonable structural design and obvious therapeutic effect.

[0004] The technical solution of this utility model is: a proximal humeral internal support system, including a steel plate with several screw holes. An upper locking screw is installed in the upper screw hole of the steel plate, and a lower locking screw is installed in the lower screw hole of the steel plate. The system is characterized by a humeral talus support column installed in the middle screw hole of the steel plate. The humeral talus support column is a large-diameter sleeve-type hollow cylinder with a flat-headed front end and a slotted connection between the rear end of the humeral talus support column and the middle screw hole. The outer wall of the humeral talus support column is unthreaded, but the inner wall of the rear end of the humeral talus support column has an upward oblique thread. The upper end face of the humeral talus support column has a slot that communicates with the inner hole of the humeral talus support column. An anti-rotation auxiliary screw is also provided to match the humeral talus support column. The anti-rotation auxiliary screw enters from the inner hole of the rear end of the humeral talus support column and exits from the slot on its upper end face to form a cross connection structure with the humeral talus support column. The rear end of the anti-rotation auxiliary screw is threaded to the upward oblique thread on the inner wall of the rear end of the humeral talus support column.

[0005] Furthermore, the anti-rotation auxiliary screw is a partially hollow screw, and several side holes communicating with its hollow inner cavity are provided on the side wall of the anti-rotation auxiliary screw.

[0006] Furthermore, a stitching side hole is provided at the upper end of the steel plate.

[0007] Compared with existing technologies, this utility model has the following advantages: 1. The innovatively designed humeral talus support column can provide sufficient stable internal support, and its robust flat-head design at the front end can prevent it from penetrating into the joint. 2. The humeral talus support column and the steel plate are connected by a slotted connection, which can better prevent rotation and screw slippage compared with the traditional threaded connection; 3. The anti-rotation auxiliary nail and the humeral talus support column, designed in conjunction with the upper and lower locking screws at both ends of the plate, form an angular stability, which better locks and fixes the fracture fragments and is conducive to fracture stability. 4. Since the humeral talus support column and the anti-rotation auxiliary screw have formed a sufficient stable support, the number of screws on the steel plate of this utility model can be greatly reduced. Compared with the traditional number of at least 12 screws, the number of screws in this utility model can be reduced to less than 7 screws, and the length of the steel plate can also be greatly shortened, reducing surgical incisions and simplifying operation. 5. The antirotation screw is also designed with a side hole that communicates with the internal cavity, allowing bone cement or artificial bone to be injected during surgery, providing better stability for osteoporosis patients.

[0008] The present invention will now be explained in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model.

[0010] Figure 2 yes Figure 1 A sectional view.

[0011] Figure 3 This is a schematic diagram of a humeral talus support column according to the present invention.

[0012] Figure 4 yes Figure 3 A sectional view.

[0013] Figure 5 This is a schematic diagram of the anti-rotation auxiliary nail of this utility model.

[0014] Explanation of reference numerals in the attached figures: 1 steel plate, 201 Upper screw hole, 202 Middle screw hole, 203 Lower screw hole 3. Humeral talus support post, 301 oblique thread, 302 slot, 303 retaining groove. 4 anti-rotation auxiliary pins, 401 side holes, 5. Locking screws, 6 locking screws, 7. Suture the side holes. Detailed Implementation

[0015] See Figure 1 , Figure 2A proximal humeral internal support system includes a steel plate 1 with multiple screw holes. Three upper screw holes 201 are located on the upper part of the steel plate 1, each housing an upper locking screw 5. Two lower screw holes 203 are located on the lower part of the steel plate 1, each housing a lower locking screw 6. One of the lower locking screws 6 can be a cortical bone screw, used to compress the steel plate for better adhesion. A middle screw hole 202 with a larger diameter is located in the middle of the steel plate 1, housing a humeral talus support post 3. (See also...) Figure 3 , Figure 4 The humeral stature support column 3 is a large-diameter sleeve-type hollow cylinder with an outer diameter of approximately 10 mm. The outer wall of the humeral stature support column 3 is not threaded, but an upward oblique thread 301 is provided on the inner wall of the rear end of the humeral stature support column 3. A slot 302 is provided on the upper end face of the humeral stature support column 3, which communicates with the inner cavity of the humeral stature support column 3. The front end of the humeral stature support column 3 has a flat-head structure, and the rear end of the humeral stature support column 3 has a retaining groove 303, which is engaged with the screw hole 202 in the middle of the steel plate through the retaining groove 303.

[0016] A matching anti-rotation auxiliary screw 4 is provided on the humeral talus support column 3, see [reference]. Figure 5 The anti-rotation auxiliary screw 4 is a hollow screw with a hollow inner cavity. The outer diameter of the anti-rotation auxiliary screw 4 is approximately 6.5 mm. Multiple side holes 401 communicating with its hollow inner cavity are provided on the side wall of the anti-rotation auxiliary screw 4. The anti-rotation auxiliary screw 4 enters from the inner hole at the rear end of the humeral talus support column 3 and exits from the slot 302 on its upper end face, forming a cross connection structure with the humeral talus support column 3. The rear end of the anti-rotation auxiliary screw 4 is threadedly connected to the upper oblique thread 301 on the inner wall of the rear end of the humeral talus support column 3.

[0017] Between the top of the steel plate 1 and the upper screw hole 201, there are also multiple suture side holes 7. The large and small nodules can be sutured and fixed to the steel plate 1 using the suture holes 7, which is used to assist in the reduction of the fracture site.

[0018] Because the number of screws on this proximal humeral internal support system is relatively small, the length of plate 1 can be made shorter. According to the human skeletal structure, its length is about 70mm, which is about 20mm shorter than the traditional fixation plate. The shorter plate can reduce the surgical incision and is beneficial to the patient's postoperative recovery.

[0019] In existing technologies, the screws on the steel plate are not only numerous but also relatively thin, generally with a diameter of about 1.5 mm or less. This invention is the opposite of existing technologies. Because the thicker humeral talus support column 3 and the anti-rotation auxiliary screw 4 already provide sufficient stable support, the number of locking screws used for fixing at both ends of the steel plate can be greatly reduced. Correspondingly, each locking screw is thicker, with a diameter of approximately 3.5-5.0 mm.

[0020] The following description of the surgical procedure will briefly illustrate the usage of the proximal humeral internal support system of this invention.

[0021] After reducing the fracture site, place the steel plate in the appropriate position, screw the guide sleeve into the central screw hole, insert the guide pin, and remove the steel plate after confirming the guide pin is in the correct position using fluoroscopy. Determine the drilling length and perform drilling and reaming.

[0022] The steel plate and the humeral talus support post are snapped together and assembled. The humeral talus support post is then placed into the enlarged hole along the central guide pin. After confirming the depth of the humeral talus support post and the proper position of the steel plate with fluoroscopy, the central guide pin is removed.

[0023] Based on the steel plate, drill holes at the upper and lower screw holes respectively, measure the depth, and then screw in the upper locking screw, lower locking screw, and anti-rotation auxiliary screw, ensuring the position and length are appropriate under X-ray. Use the suture holes to suture and fix the large and small nodules to the steel plate.

[0024] An appropriate amount of bone cement or artificial bone is injected into the hollow cavity at the tail end of the antirotation screw, and then implanted into the proximal humerus through its side hole.

[0025] The fracture reduction was finally confirmed, and the position and stability of the implant were assessed before the surgery was completed.

Claims

1. A proximal humeral internal support system, comprising a steel plate (1), the steel plate (1) having a plurality of screw holes, an upper locking screw (5) being provided in the upper screw hole (201) of the steel plate (1), and a lower locking screw (6) being provided in the lower screw hole (203) of the steel plate (1), characterized in that, A humeral talus support column (3) is provided in the screw hole (202) in the middle of the steel plate (1). The humeral talus support column (3) is a hollow cylinder with a large diameter sleeve. The front end of the humeral talus support column (3) is a flat-head structure. The rear end of the humeral talus support column (3) is connected to the middle screw hole (202) by a slot. The outer wall of the humeral talus support column (3) is not threaded. An upward oblique thread (301) is provided on the inner wall of the rear end of the humeral talus support column (3). A slot (302) is opened on the upper end face of the humeral talus support column (3). The slot (302) is connected to the inner hole of the humeral talus support column (3). An anti-rotation auxiliary nail (4) is provided to match the humeral talus support column (3). The anti-rotation auxiliary nail (4) is inserted into the inner hole at the rear end of the humeral talus support column (3) and exits through the slot (302) on its upper end face to form a cross-connection structure with the humeral talus support column (3). The rear end of the anti-rotation auxiliary nail (4) is threaded to the upper oblique thread (301) on the inner wall of the rear end of the humeral talus support column (3).

2. The proximal humeral internal support system according to claim 1, characterized in that, The anti-rotation auxiliary screw (4) is a hollow screw, and several side holes (401) communicating with its hollow inner cavity are provided on the side wall of the anti-rotation auxiliary screw (4).

3. The proximal humeral internal support system according to claim 1, characterized in that, A stitching side hole (7) is also provided at the upper end of the steel plate (1).

4. The proximal humeral internal support system according to claim 1, characterized in that, The number of upper locking screws (5) is ≤3, and the upper locking screws (5) are coarse screws.

5. The proximal humeral internal support system according to claim 1, characterized in that, The number of the lower locking screws (6) is ≤2, and the lower locking screws (6) are coarse screws.

Images