Intertrochanteric fracture opening system

Abstract

A femoral intertrochanteric fracture opening system is characterized by comprising a sleeve, a hollow sleeve core and a hollow trephine, an impact portion is arranged at one end of the sleeve, a plurality of sawteeth are arranged on the outer ring of the end of the other end of the sleeve, the inner diameter of the sleeve is the same as the outer diameter of the hollow sleeve core, a center hole is formed in the center of the hollow sleeve core, and the hollow trephine is arranged in the center hole. The sleeve is limited and fixed through the hollow sleeve core, and the hollow trephine is limited through the sleeve and the positioning guide pin, so that the accuracy of the opening position is ensured; according to the utility model, the trephine is used for opening, the force is uniform when the trephine is used for opening, and the outer surface of the trephine does not have the situation that the size of the outer surface of a conical drill is always changed, so that the situation that bone blocks on two sides of a fracture line are extruded in the opening process is avoided, and the serious defect that the bone can be extruded open by a traditional drill bit is overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of equipment for intertrochanteric fracture surgery, in particular to an intertrochanteric fracture opening system. Background Art

[0002] Intertrochanteric fracture, also known as intertrochanteric fracture, mainly refers to the fracture that occurs from the base of the femoral neck to the level above the lesser trochanter, and is an extracapsular fracture of the hip joint.

[0003] Currently, when performing surgical fixation on intertrochanteric fractures of the femur, it is necessary to make an opening on the femur and then insert a fixation nail for fixation. The current operation for making the opening during the operation is to first insert a guide pin on the femoral trochanter and then use a tapered drill bit to make the opening. Since the guide pin may be easily inserted at the fracture line, in such a case, when using the tapered drill bit to make the opening when the guide pin is guided, as the tapered drill bit continues to penetrate into the femur, the outer surface of the drill bit will squeeze the bone blocks on both sides, making the size of the opening unstable. As a result, when the fixation nail is subsequently inserted into the opening, the fixation nail will still squeeze the bone blocks on both sides of the opening, resulting in unstable fracture fixation.

[0004] Therefore, it is necessary to propose an intertrochanteric fracture opening system to solve the above problems. Utility Model Content

[0005] In response to the above technical problems, the utility model provides an intertrochanteric fracture opening system, which uses a hollow sleeve core to limit and fix the sleeve, and uses the sleeve and positioning guide to limit the hollow ring drill, thereby ensuring the accuracy of the opening position. The ring drill is used for opening, and the ring drill has uniform force when opening, which gets rid of the serious disadvantage of traditional drill bits that will squeeze the bone.

[0006] To achieve the above purpose, the technical solution of the utility model is as follows:

[0007] A femoral intertrochanteric fracture opening system, characterized by comprising a sleeve, a hollow sleeve core and a hollow trephine, wherein one end of the sleeve is provided with an impact portion, and the outer ring at the other end of the sleeve is provided with a plurality of serrations, the inner diameter of the sleeve is the same as the outer diameter of the hollow sleeve core, and a center hole is provided at the center of the hollow sleeve core, and the sleeve is adapted to the hollow trephine.

[0008] The hollow trephine is composed of a connecting end, a guide portion and a trephine end. The outer diameter of the trephine end is the same as the inner diameter of the sleeve. The tail of the trephine end is connected to the guide portion as a whole. A guide hole is provided at the center of the guide portion and the trephine end. The tail end of the guide portion is connected to the connecting end as a whole.

[0009] The diameters of the central hole and the guide hole are both the same as the diameter of the positioning guide needle.

[0010] Specifically, one end of the hollow core is configured to have a conical structure.

[0011] Specifically, a handle is provided on the sleeve.

[0012] Specifically, the connecting end is connected to an electric drill.

[0013] Beneficial effects of the utility model:

[0014] When the utility model is used, a positioning guide pin is first inserted into the femur, and then the hollow sleeve core is combined with the sleeve, and then the sleeve is put on the positioning guide pin, so that the end of the sleeve provided with the serrations moves to the bone cortex, and then the impact part on the sleeve is appropriately knocked to make the position of the sleeve relatively fixed, and the hollow sleeve core is taken out, and the hollow trephine connected to the electric drill is inserted into the sleeve, and the guide hole of the hollow trephine is inserted by the positioning guide pin, and the trephine end of the hollow trephine is moved to the bone cortex, and then the electric drill is started to open, and the sleeve is limited and fixed by the hollow sleeve core, and the hollow trephine is limited by the sleeve and the positioning guide pin, so as to ensure the accuracy of the opening position;

[0015] The utility model uses a ring drill to make an opening. The ring drill has uniform force when making an opening. The outer surface of the ring drill does not have the outer surface size of the tapered drill in a constantly changing state. Therefore, the bone blocks on both sides of the fracture line will not be squeezed during the opening process, thereby getting rid of the serious disadvantage of traditional drill bits that will squeeze the bone. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the sleeve structure of an intertrochanteric fracture opening system of the utility model;

[0017] Figure 2 This is a schematic diagram of the hollow core structure of an intertrochanteric fracture opening system of the utility model;

[0018] Figure 3 This is a schematic cross-sectional view of a hollow core of an intertrochanteric fracture opening system according to the present invention;

[0019] Figure 4 This is a schematic structural diagram of a hollow trephine drill of an intertrochanteric fracture opening system of the present invention;

[0020] Figure 5 It is a cross-sectional schematic diagram of a hollow trephine drill of an intertrochanteric fracture opening system of the present invention;

[0021] Figure 6 This is an overall schematic diagram of three components of an intertrochanteric fracture opening system according to the present invention;

[0022] As shown in the figure: 1. Sleeve, 11. Impact part, 12. Saw teeth, 13. Handle, 2. Hollow core, 21. Center hole, 3. Hollow trephine, 31. Connecting end, 32. Guide part, 33. Trephine end, 323. Guide hole. DETAILED DESCRIPTION

[0023] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0026] Example 1

[0027] As shown in the figure, a striking portion 11 is provided at one end of the sleeve 1, a plurality of saw teeth 12 are provided on the outer ring at the other end of the sleeve 1, and a handle 13 is provided on the sleeve 1 for easy operation.

[0028] The inner diameter of the sleeve 1 is the same as the outer diameter of the hollow core 2. Figure 3 A central hole 21 is provided at the center of the hollow core 2. The diameter of the central hole 21 is the same as the diameter of the positioning guide needle, and one end of the hollow core 2 is provided with a tapered structure.

[0029] The inner diameter of the sleeve 1 is also perfectly matched with the trephine end 33 of the hollow trephine 3, as shown in FIG. Figure 4 and 5 The tail of the trepanation drill 33 is connected to the guide part 32 as a whole. A guide hole 323 is provided at the center position of the guide part 32 and the trepanation drill end 33. The aperture of the guide hole 323 is the same as the diameter of the positioning guide pin. The tail end of the guide part 32 is connected to the connecting end 31 as a whole. The connecting end 31 is used to connect to the electric drill tool.

[0030] Example 2

[0031] When using the present invention, a positioning guide pin is first inserted into the femur, and then the hollow sleeve core 2 and the sleeve 1 are combined. Then, the hollow sleeve core 2 is sleeved onto the positioning guide pin through the center hole 21 of the hollow sleeve core 2, so that the end of the sleeve 1 provided with the serrations 12 is moved to the bone cortex, and then the impact portion 11 on the sleeve 1 is appropriately struck so that the position of the sleeve 1 is relatively fixed on the bone cortex. After the hollow sleeve core 2 used for positioning the sleeve 1 is taken out, the hollow trephine 3 connected to the electric drill is inserted into the sleeve 1, and the guide hole 323 of the hollow trephine 3 is inserted by the positioning guide pin. After the trephine end 33 of the hollow trephine 3 is moved to the bone cortex, the electric drill is started to open, and the hollow trephine 3 is limited by the sleeve 1 and the positioning guide pin, thereby ensuring the accuracy of the opening position;

[0032] A trephine drill is used to make an opening. The trephine drill has uniform force when making an opening, and the outer surface of the trephine drill does not have a constantly changing size like the outer surface of a conical drill. Therefore, the bone blocks on both sides of the fracture line will not be squeezed during the opening process, thus getting rid of the serious disadvantage of traditional drill bits that will squeeze the bone.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. The various components mentioned in the present invention are common technologies in the existing field. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in this utility model is defined by the appended claims and their equivalents.

Claims

1. A femoral intertrochanteric fracture opening system, characterized in that It includes a sleeve, a hollow core and a hollow ring drill. One end of the sleeve is provided with an impact part, and the outer ring at the other end of the sleeve is provided with multiple serrations. The inner diameter of the sleeve is the same as the outer diameter of the hollow core. A center hole is provided at the central position of the hollow core. The sleeve is adapted to the hollow ring drill.

2. The intertrochanteric fracture opening system according to claim 1, characterized in that The hollow trepanation drill consists of a connecting end, a guide part and a trepanation drill end. The outer diameter of the trepanation drill end is the same as the inner diameter of the sleeve. The tail of the trepanation drill end is connected to the guide part as a whole. A guide hole is provided at the center position of the guide part and the trepanation drill end. The tail end of the guide part is connected to the connecting end as a whole.

3. The intertrochanteric fracture opening system according to claim 2, characterized in that The diameters of the central hole and the guide hole are both the same as the diameter of the positioning guide needle.

4. The intertrochanteric fracture opening system according to claim 1, characterized in that One end of the hollow core is configured to have a conical structure.

5. The intertrochanteric fracture opening system according to claim 1, characterized in that The sleeve is provided with a handle.

Images