Breakable empennage type screw blade

Abstract

The utility model discloses a fracturable empennage type screw blade, and aims to provide a fracturable empennage type screw blade which is characterized in that the screw blade nail tail part can be fractured, and the length of the screw blade can be adjusted in an operation. Comprising a blade body, a spiral tool bit is arranged at one end of the blade body, a communicating pipe opening is formed in the other end of the blade body, a surface groove is formed in the side wall of the blade body, a breakable empennage piece is connected to the end of the communicating pipe opening, and a cutting slope is arranged at the end of the empennage piece. An inner core through hole is formed in the blade body and penetrates through the spiral tool bit. The utility model has the beneficial effects that the tail wing sheet is arranged at the rear end of the connecting pipe orifice and can be broken, so that the length requirement of an operation is met; and a breaking groove is formed between the blade main body and the empennage piece, so that the empennage piece is convenient to break.

Description

Technical Field

[0001] The utility model relates to the technical field of orthopedic medical instruments, in particular to a breakable tail-wing spiral blade. Background Art

[0002] As my country enters the stage of population aging and life expectancy increases, the incidence of intertrochanteric fractures is on the rise. Conservative treatment of intertrochanteric fractures has many complications, and surgical treatment is the first choice. The purpose of surgery is to complete the reduction and fixation of the fracture to allow the patient to walk as soon as possible. In the past 20 years, with the continuous improvement of intramedullary nail design and the improvement of related surgical techniques, intramedullary nails have become active in the treatment of intertrochanteric fractures again, and have gradually developed into one of the mainstream methods for the treatment of intertrochanteric fractures and become the most widely used implant. The PFNA system (proximal femoral anti-rotation intramedullary nail) is currently the most commonly used internal fixation device for the treatment of intertrochanteric fractures in clinical practice. Its unique spiral blade design can enhance the compression effect on the bone, increase the anchoring force and strengthen the anti-rotation property. Especially for unstable fractures with severe osteoporosis, the use of PFNA internal fixation treatment has achieved good fixation effects.

[0003] During surgery, due to the body position and intraoperative C-arm shooting angle, the exposed length of the spiral blade nail tail is considered to be within the acceptable range. In fact, the exposed nail tail is longer, which affects the patient's later recovery. At the same time, due to the patient's bone quality problems, the spiral blade may loosen and the nail may be withdrawn. In this case, the tail of the spiral blade will be exposed longer in the bone, causing soft tissue interference, which in turn leads to pain induction and difficulty in lying on the side. In this case, a second operation is often performed to re-implant the spiral blade. Utility Model Content

[0004] The utility model aims to overcome the disadvantages of the prior art that the spiral blade is too long due to measurement error, resulting in interference of the spiral blade nail tail with soft tissue after surgery and causing pain. The utility model provides a breakable tail-wing spiral blade with a spiral blade nail tail that can be broken off, so that the length of the spiral blade can be adjusted during surgery.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a breakable tail wing type spiral blade, comprising a blade body, a spiral cutter head is arranged at one end of the blade body, a connecting pipe mouth is arranged at the other end of the blade body, a surface groove is arranged on the side wall of the blade body, a breakable tail wing piece is connected to the end of the connecting pipe mouth, a cutting bevel is arranged at the end of the tail wing piece, an inner core through hole is arranged inside the blade body, and the inner core through hole passes through the spiral cutter head.

[0006] Preferably, a breaking groove is provided between the connecting pipe opening and the tail fin, and the breaking groove is parallel to the cutting bevel.

[0007] Preferably, the tail wing piece is provided with a clearance groove, the clearance groove runs through the tail wing piece and is aligned with the surface groove, and the clearance groove is vertically connected to the breaking groove.

[0008] Preferably, arc-shaped introduction surfaces are provided at both ends of the surface groove.

[0009] Preferably, an arc-shaped transition slope is provided between the blade body and the spiral cutter head.

[0010] Preferably, the communicating pipe opening is connected to the inner core through hole, a connecting groove is provided inside the communicating pipe opening, and an internal thread is provided inside the connecting groove.

[0011] The beneficial effects of the utility model are as follows: a tail wing piece is arranged at the rear end of the connecting pipe mouth, and the tail wing piece can be broken to meet the length requirement of the operation; a breaking groove is arranged between the blade body and the tail wing piece to facilitate the breaking operation of the tail wing piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional view of the utility model;

[0013] Figure 2 It is a cross-sectional view of the utility model.

[0014] In the accompanying drawings,

[0015] 1. Blade body, 2. Spiral cutter head, 3. Connecting pipe mouth, 4. Surface groove, 5. Tail wing, 6. Cutting bevel, 7. Inner core through hole, 8. Breaking groove, 10. Transition bevel, 30. Connecting groove, 40. Lead-in surface, 50. Give way groove. DETAILED DESCRIPTION

[0016] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0017] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0018] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0019] Embodiment 1, as Figure 1-2 As shown, a breakable tail wing type spiral blade is characterized in that it includes a blade body 1, one end of the blade body 1 is provided with a spiral cutter head 2, the other end of the blade body 1 is provided with a connecting pipe mouth 3, the side wall of the blade body 1 is provided with a surface groove 4, the end of the connecting pipe mouth 3 is connected with a breakable tail wing piece 5, the end of the tail wing piece 5 is provided with a cutting bevel 6, and an inner core through hole 7 is provided inside the blade body 1, and the inner core through hole 7 passes through the spiral cutter head 2.

[0020] A breaking groove 8 is provided between the connecting pipe opening 3 and the tail fin piece 5 , and the breaking groove 8 is parallel to the cutting bevel 6 .

[0021] The tail wing piece 5 is provided with a clearance groove 50 , which passes through the tail wing piece 5 and is aligned with the surface groove 4 , and is vertically connected to the breaking groove 8 .

[0022] Arc-shaped introduction surfaces 40 are provided at both ends of the surface groove 4 .

[0023] An arc-shaped transition slope 10 is provided between the blade body 1 and the spiral cutter head 2 .

[0024] The connecting pipe opening 3 is connected to the inner core through hole 7 , a connecting groove 30 is provided inside the connecting pipe opening 3 , and an internal thread is provided inside the connecting groove 30 .

[0025] The working principle of the utility model is as follows: Figure 1-2 As shown, a spiral cutter head 2 is connected to one end of the blade body 1, and a connecting pipe port 3 is provided at the other end, wherein a transition slope 10 is provided at the connection between the blade body 1 and the spiral cutter head 2, and the transition slope 10 is arc-shaped. The setting of the transition slope 10 can facilitate the spiral cutter head 2 to enter the bone and realize the fixation of the blade body 1 and the bone. At the same time, the spiral cutter head 2 is provided with a plurality of blade edges, and they are spiral-shaped. This type of spiral cutter head 2 can ensure stable fixation in the bone and avoid the situation of retreating the cutter.

[0026] The end of the connecting pipe mouth 3 is connected with a tail fin 5, and a breaking groove 8 is set between the connecting pipe mouth 3 and the tail fin 5. The width of the breaking groove 8 is 0.9mm. At the same time, a cutting bevel 6 is set at the end of the tail fin 5. The cutting bevel 6 is 125° with the axis. At the same time, the breaking groove 8 is parallel to the cutting bevel 6. The height of the tail fin 5 is 7mm. The tail fin 5 is provided with a clearance groove 50. The width of the clearance groove 50 is 2mm. The clearance groove 50 runs through the tail fin 5 and the clearance groove 50 is aligned with the surface groove 4. At the same time, the clearance groove 50 is vertically connected to the breaking groove 8. The setting of the breaking groove 8 facilitates the tail fin 5 to be broken and disassembled from the connecting pipe mouth 3. At the same time, the setting of the clearance groove 50 divides the tail fin 5 into two parts, which is convenient for breaking the tail fin 5 when the tail fin 5 is broken.

[0027] At the same time, a surface groove 4 is provided on the side wall of the blade body 1, and an introduction surface 40 is provided at both ends of the surface groove 4. The introduction surface 40 is arc-shaped, and the introduction surface 40 can facilitate the smooth entry of the tail cap.

[0028] At the same time, an inner core through hole 7 is provided inside the blade body 1, and the inner core through hole 7 runs through the blade body 1 and the spiral cutter head 2, ensuring good component integration. The inner core through hole 7 is provided to ensure that the spiral blade has a better filling effect on the bone when the spiral blade enters the bone for internal fixation, thereby obtaining a better anchoring force, and for patients with osteoporosis, the spiral blade is fixed stably, avoiding the occurrence of the blade retreat, and ensuring a better fixing effect.

[0029] Meanwhile, a connecting groove 30 is provided inside the connecting pipe opening 3, and an internal thread is provided inside the connecting groove 30, so that the internal thread is convenient for taking out after operation.

[0030] The use steps of the utility model are as follows: after the spiral blade is screwed into the bone, the tail length of the spiral blade is determined according to the actual length required. If the tail of the spiral blade is extended too long, the tail wing piece 5 at the tail of the spiral blade can be broken by a surgical tool to shorten the length of the spiral blade to meet the problem of the selected spiral blade length being too long due to the measurement error during the operation, so as to avoid the secondary implantation of a new spiral blade after removal, thereby avoiding the decrease in the stability of the fixed part. At the same time, if after the operation is completed, as the bone growth recovers, the tail of the spiral blade may be exposed to a long bone, it is possible to choose to break part of the tail wing piece 5 under local anesthesia, thereby reducing its interference with soft tissue and relieving pain. At the same time, it is possible to avoid secondary surgery to remove the entire implant, or even to perform a renovation operation, thereby ensuring that the patient experiences less trauma and reducing complications caused by anesthesia or surgical trauma.

[0031] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A detachable tail wing spiral blade, characterized in that: The blade body (1) comprises a blade main body (1), one end of which is provided with a spiral cutter head (2), the other end of which is provided with a connecting pipe opening (3), a side wall of which is provided with a surface groove (4), the end of which is connected with a breakable tail wing piece (5), the end of which is provided with a cutting bevel (6), and an inner core through hole (7) is provided inside the blade main body (1), the inner core through hole (7) passing through the spiral cutter head (2).

2. A breakable tail wing spiral blade according to claim 1, characterized in that: A breaking groove (8) is provided between the connecting pipe opening (3) and the tail wing piece (5), and the breaking groove (8) is parallel to the cutting bevel (6).

3. A breakable tail wing spiral blade according to claim 2, characterized in that: The tail wing piece (5) is provided with a clearance groove (50), the clearance groove (50) penetrates the tail wing piece (5) and is aligned with the surface groove (4), and the clearance groove (50) is vertically connected to the breaking groove (8).

4. The breakable tail wing spiral blade according to claim 1, characterized in that: Arc-shaped introduction surfaces (40) are provided at both ends of the surface groove (4).

5. The breakable tail wing spiral blade according to claim 1, characterized in that: An arc-shaped transition slope (10) is provided between the blade body (1) and the spiral cutter head (2).

6. The breakable tail wing spiral blade according to claim 1, characterized in that: The connecting pipe opening (3) is connected to the inner core through hole (7), a connecting groove (30) is provided inside the connecting pipe opening (3), and an internal thread is provided inside the connecting groove (30).

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