CN211796818U - Intramedullary nail guider capable of centering and fine adjustment - Google Patents

Abstract

An intramedullary nail guide capable of centering and fine adjustment belongs to the technical field of traction devices. It includes an intramedullary nail guide wire, a fine-tuning needle, a pulling structure and an intramedullary nail guide body. The intramedullary nail guide body includes an integrally formed long cylindrical body and a T-shaped handshake, and the long cylindrical body is away from one end of the T-shaped handshake. In the shape of a wedge, the long cylindrical body includes an intramedullary nail guide wire hole, a pulling rod hole and a fine-tuning pin hole which are hollowed out in the axial direction and side by side in sequence. The present invention solves the problems of inconvenient direction correction and complicated correction process existing in the prior art when the central insertion of the intramedullary nail guide is not good. The intramedullary nail guide can perform centering adjustment for the insertion of the intramedullary nail guide wire under the condition that the intramedullary nail guide has a small insertion displacement deviation, the intramedullary nail guide wire is fed stably and is easy to control, and the intramedullary nail guide wire is stable and easy to control. Accuracy and efficiency of staple guide wire insertion.

Description

An intramedullary nail guide that can be fine-tuned for centering

technical field

The utility model belongs to the technical field of traction devices, in particular to an intramedullary nail guide capable of fine-tuning the centering.

Background technique

In the operation of using intramedullary nails to treat humeral fractures, it is necessary to insert the intramedullary nail guide into the most central position of the humerus to guide the insertion of the intramedullary nail and achieve the most uniform force of the intramedullary nail, but the actual situation is due to the long bone shaft. Large epiphysis (especially the distal end of the femur and proximal end of the tibia), surrounding soft tissue obstruction and other factors make it difficult to accurately insert the intramedullary nail guide into the center of the metaphysis of long bones. Due to the poor alignment of insertion, a large number of C-arm fluoroscopy is often required to determine the specific position of the intramedullary nail during the insertion of the intramedullary nail, so as to correct the insertion direction. This process is complicated and affects the amount of X-ray radiation for the doctor and the patient. Larger, resulting in difficult and time-consuming surgical operations, and even more trauma.

The invention patent application with application number 2016206652X discloses an intramedullary nail, the intramedullary nail includes a hollow nail shaft and a locking hole on the nail shaft; for guiding a drilling device to move from an opening to the locking hole; one end of the guiding device is connected with the locking hole, and the other end of the guiding device is connected with the opening of the intramedullary nail. In the intramedullary nail provided by the present invention, a guide device is built into the hollow nail shaft for guiding a drilling device to move from an opening to the key hole, so that the drilling device can find the intramedullary nail easily and quickly. keyhole. Further, the intramedullary nail has a simple structure and is easy to operate, thereby also overcoming the problems of many intramedullary nail supporting components and complicated operations in the prior art. However, in actual use, it is difficult to accurately insert the intramedullary nail into the center of the metaphysis of the long bone, and it is inconvenient to fine-tune the centering position during adjustment.

Utility model content

Technical problem to be solved: In view of the problems in the prior art, such as inconvenient direction correction and complicated correction process when the intramedullary nail guide is not well centered and inserted, the present utility model provides an intramedullary nail that can be fine-tuned for centering. The guide has the advantages of simple structure and fine-tuning of centering.

Technical solution: an intramedullary nail guide that can be fine-tuned for centering, the intramedullary nail guide includes an intramedullary nail guide wire, a fine-tuning needle, a pulling structure and an intramedullary nail guide main body, the intramedullary nail guides The main body of the device includes an integrally formed long cylinder and a T-shaped handshake, the end of the long cylinder away from the T-shaped handshake is wedge-shaped, and the long cylinder includes an intramedullary nail guide wire hole and a pulling rod hole that are hollowed out in the axial direction and side by side. and fine-tuning pinholes,

The intramedullary nail guide wire is a stainless steel wire. One end of the intramedullary nail guide wire passes through the intramedullary nail guide wire hole away from the end of the T-shaped handshake, and the other end of the intramedullary nail guide wire passes through the intramedullary nail guide wire hole and is close to the T-shaped handshake. one end;

The fine-tuning needle includes an integrally formed tip and a fine-tuning needle body, the tip is a Y-shaped opening and the tip is made of elastic material, the Y-shaped opening of the tip is fitted with the diameter of the guide wire of the intramedullary nail, the fine-tuning needle body is a long cylinder, and the tip passes through The fine-tuning pinhole is away from the end of the T-shaped handshake, and the fine-tuning pin body goes out of the fine-tuning pinhole and is close to the end of the T-shaped handshake;

The pulling structure includes a pulling rod and a lifting sleeve. The lifting sleeve is a cylindrical sleeve body with a diameter larger than the outer diameter of the fine-tuning needle body and a hollow inside. One end of the pull rod passes through the pull rod hole away from the end of the T-shaped handshake and is hinged with the middle part of the outer side of the lifting sleeve. The other end of the pulling rod passes through the pulling rod hole. The tip of the traction fine-tuning needle is fitted with the end of the guide wire of the intramedullary nail that goes out of the guide wire hole of the intramedullary nail and away from the T-shaped handshake.

Preferably, the intramedullary nail guide also includes an angle fine-tuning knob, a telescopic fine-tuning knob, an angle fine-tuning gear and a telescopic fine-tuning gear. The needle hole is close to one end of the T-shaped handshake. The body of the fine-tuning needle is a long cylinder with threads on the surface. The outer surface of the pulling rod is equipped with threads. The angle fine-tuning gear corresponds to and is movably connected to the outer surface of the pulling rod. The telescopic fine-tuning gear Corresponding to the thread on the outer surface of the fine-tuning needle and movably connected with it, the angle fine-tuning knob is connected with the axis of the angle fine-tuning gear, and the telescopic fine-tuning knob is connected with the shaft of the telescopic fine-tuning gear.

Preferably, the guide wire hole of the intramedullary nail is concentric with the outer surface of the long cylindrical side wall of the main body of the intramedullary nail guide, and the pulling rod hole and the fine-tuning pin hole are eccentric holes.

Preferably, the fine-tuning needle body, the pulling rod, the lifting sleeve and the main body of the intramedullary nail guide are made of stainless steel.

Preferably, the tip of the fine-tuning needle is made of rubber.

Beneficial effects: 1. The tip of the fine-tuning needle in this new model is made of elastic material and has a Y-shaped opening, which can be fitted with the outer diameter of the guide wire of the intramedullary nail, and the lifting sleeve can be fully retracted by elastic deformation. Natural stretch, easy to push the guide wire of the intramedullary nail inserted into the hole of the guide wire of the intramedullary nail to adjust and advance at a small angle to the outside;

2. The new model adjusts the bending arc of the tip of the fine-tuning needle through the pulling rod and the lifting sleeve, thereby adjusting the bending angle of the guide wire of the intramedullary nail. Realize the fine-tuning of the intramedullary nail guide wire in the center of the humerus;

3. The new model can precisely adjust the centering position of the intramedullary nail guide wire on the humerus through the cooperation between the angle fine-tuning gear, the outer surface thread of the pulling rod, the telescopic fine-tuning gear, and the outer surface thread of the fine-tuning needle.

4. The intramedullary nail guide that can be fine-tuned in the center of the utility model is simple in structure and convenient in operation; it can quickly reduce humeral fractures, improve the quality of operation, and reduce fractures more accurately, which solves the problem that has not been solved for a long time. The intramedullary nail is a very effective medical device for the reduction of humeral fractures.

Description of drawings

Figure 1 is a schematic cross-sectional structure diagram of the new intramedullary nail guide when the centering angle is fine-tuned;

Fig. 2 is a partial enlarged view a in Fig. 1;

Fig. 3 is a partial enlarged view b in Fig. 1;

Figure 4 is a schematic cross-sectional structure diagram of the intramedullary nail guide of the new type when it is aligned;

Fig. 5 is the front view of the intramedullary nail guide of the new type;

Fig. 6 is a partial enlarged view c in Fig. 5;

FIG. 7 is a schematic diagram of the state of fitting of the tip of the fine-tuning needle and the guide wire of the intramedullary nail according to the new model.

The numbers in the figure represent the following: 1. Intramedullary nail guide body; 2. T-shaped handshake; 3. Intramedullary nail guide wire hole; 4. Intramedullary nail guide wire; 5. Fine-tuning needle hole; 6. Fine-tuning needle ; 7. Pull rod hole; 8. Pull rod; 9. Lifting sleeve; 10. Angle fine-tuning knob; 11. Telescopic fine-tuning knob; 12. Angle fine-tuning gear; 13. Telescopic fine-tuning gear.

Detailed ways

In order to be able to understand the above-mentioned objects, features and advantages of the present invention more clearly, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments may be combined with each other in the case of no conflict.

In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the following Limitations of the specific embodiments disclosed.

Example 1

An intramedullary nail guide that can be fine-tuned for centering, see Figures 1 to 7, the intramedullary nail guide includes an intramedullary nail guide wire 4, a fine-tuning needle 6, a pulling structure and an intramedullary nail guide main body 1. The main body 1 of the intramedullary nail guide includes an integrally formed long cylindrical body and a T-shaped handle 2. The end of the long cylindrical body away from the T-shaped handle 2 is wedge-shaped. The inner nail guide wire hole 3, the pull rod hole 7 and the fine adjustment pin hole 5.

The intramedullary nail guide wire 4 is a stainless steel wire. One end of the intramedullary nail guide wire 4 passes through the intramedullary nail guide wire hole 3 and one end away from the T-shaped handshake 2. The other end of the intramedullary nail guide wire 4 passes through the intramedullary nail guide wire hole. 3 Near the end of the T-shaped handshake 2.

The fine-tuning needle 6 includes an integrally formed tip and a fine-tuning needle body, the tip is a Y-shaped opening and the tip is an elastic material, the Y-shaped opening of the tip is fitted with the diameter of the intramedullary nail guide wire 4, the fine-tuning needle body is a long cylinder, and the tip is a long cylinder. The end of the fine-tuning pin hole 5 away from the T-shaped handle 2 is passed through, and the fine-tuning pin body is passed through the fine-tuning pin hole 5 and the end of the T-shaped handshake 2 is close.

The pulling structure includes a pulling rod 8 and a lifting sleeve 9. The lifting sleeve 9 is a cylindrical sleeve body with a diameter larger than the outer diameter of the fine-tuning needle body and a hollow interior. One side edge of the lifting sleeve 9 and the pulling rod hole 7 are far away from the T-shaped handshake 2. One end of the pull rod 8 is hinged at the bottom, one end of the pull rod 8 passes through the pull rod hole 7 away from the end of the T-shaped handshake 2 and is hinged with the outer middle of the lifting sleeve 9, the other end of the pull rod 8 passes through the pull rod hole 7, and the lifting sleeve 9 Set on the outside of the fine-tuning needle tip, the pulling rod 8 and the lifting sleeve 9 pull the fine-tuning needle tip to fit with the end of the intramedullary nail guide wire 4 passing through the intramedullary nail guide wire hole 3 away from the T-shaped handshake 2 .

Example 2

An intramedullary nail guide that can be fine-tuned for centering, see FIG. 1 to FIG. 7 , the intramedullary nail guide includes an intramedullary nail guide wire 4, a fine-tuning needle 6, a pulling structure, and an intramedullary nail guide body 1 , angle fine-tuning knob 10, telescopic fine-tuning knob 11, angle fine-tuning gear 12 and telescopic fine-tuning gear 13, the intramedullary nail guide body 1 includes an integrally formed long cylindrical body and a T-shaped handshake 2, the long cylindrical body is away from the T-shaped handshake One end of 2 is wedge-shaped, and the long cylindrical body includes an intramedullary nail guide wire hole 3, a pulling rod hole 7 and a fine-tuning pin hole 5 which are hollowed out in the axial direction and arranged in sequence. The intramedullary nail guide wire hole 3 is concentric with the outer surface of the long cylindrical side wall of the intramedullary nail guide main body, and the pulling rod hole 7 and the fine adjustment pin hole 5 are eccentric holes.

The intramedullary nail guide wire 4 is a stainless steel wire. One end of the intramedullary nail guide wire 4 passes through the intramedullary nail guide wire hole 3 and one end away from the T-shaped handshake 2. The other end of the intramedullary nail guide wire 4 passes through the intramedullary nail guide wire hole. 3 Near the end of the T-shaped handshake 2.

The fine-tuning needle 6 includes an integrally formed tip and a fine-tuning needle body, the tip is a Y-shaped opening and the tip is made of elastic rubber material, the Y-shaped opening of the tip is fitted with the diameter of the intramedullary nail guide wire 4, and the fine-tuning needle body is a long cylinder, The tip passes through the fine-tuning pinhole 5 at the end away from the T-shaped handshake 2 , and the fine-tuning pin body passes through the fine-tuning pinhole 5 at the end of the T-shaped handshake 2 . The tip of the fine-tuning needle 6 is designed as an elastic Y-shaped opening, and the lifting sleeve 9 can be fully retracted by elastic deformation. Wire 4 is adjusted and advanced at a small angle to the outside.

The pulling structure includes a pulling rod 8 and a lifting sleeve 9. The lifting sleeve 9 is a cylindrical sleeve body with a diameter larger than the outer diameter of the fine-tuning needle body and a hollow interior. One side edge of the lifting sleeve 9 and the pulling rod hole 7 are far away from the T-shaped handshake 2. One end of the pull rod 8 is hinged at the bottom, one end of the pull rod 8 passes through the pull rod hole 7 away from the end of the T-shaped handshake 2 and is hinged with the outer middle of the lifting sleeve 9, the other end of the pull rod 8 passes through the pull rod hole 7, and the lifting sleeve 9 Set on the outside of the fine-tuning needle tip, the pulling rod 8 and the lifting sleeve 9 pull the fine-tuning needle tip to fit with the end of the intramedullary nail guide wire 4 passing through the intramedullary nail guide wire hole 3 away from the T-shaped handshake 2 . The fine-tuning needle body, the pulling rod 8, the lifting sleeve 9 and the main body 1 of the intramedullary nail guide are made of stainless steel, which is convenient for sterilization.

The angle fine-tuning knob 10 is set at the end of the draw rod hole 7 close to the T-shaped handshake 2, the telescopic fine-tuning knob 11 is set at the end of the fine-tuning pin hole 5 close to the T-shaped handshake 2, and the body of the fine-tuning pin is a long cylinder with threads on the surface, The outer surface of the pull rod is equipped with threads, the angle fine-tuning gear 12 corresponds to the external thread of the pull rod and is movably connected with it, the telescopic fine-tuning gear 13 corresponds to the external thread of the fine-tuning needle and is movably connected with it, and the angle fine-tuning knob 10 is connected with the angle fine-tuning The gear 12 is axially connected, and the telescopic fine-tuning knob 11 is axially connected with the telescopic fine-tuning gear 13 .

When in use, the wedge-shaped tip of the intramedullary nail guide body 1 is inserted into the human body, and the T-shaped handshake 2 is held in the hand during operation. When the intramedullary nail guide body 1 is inserted into the humerus in the correct position, the insertion angle is not adjusted. The intramedullary nail guide wire 4, when the intramedullary nail guide main body 1 is inserted into the humerus with a certain deviation in the center position, the angle can be adjusted under the pulling action of the pulling rod, and the telescopic adjustment can be realized under the action of the telescopic fine-tuning gear. The fine-tuning needle 6 realizes the fine-tuning of the centering position of the intramedullary nail guide wire 4 through the Y-shaped tip, so as to realize the accurate centering operation.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (5)

1. An intramedullary nail guide capable of centering and fine-tuning, wherein the intramedullary nail guide comprises an intramedullary nail guide wire, a fine-tuning needle, a pulling structure and an intramedullary nail guide main body, and the The main body of the intramedullary nail guide includes an integrally formed long cylindrical body and a T-shaped handshake. The end of the long cylindrical body away from the T-shaped handshake is wedge-shaped. Tie rod hole and fine adjustment pin hole, The intramedullary nail guide wire is a stainless steel wire. One end of the intramedullary nail guide wire passes through the intramedullary nail guide wire hole away from the end of the T-shaped handshake, and the other end of the intramedullary nail guide wire passes through the intramedullary nail guide wire hole and is close to the T-shaped handshake. one end; The fine-tuning needle includes an integrally formed tip and a fine-tuning needle body, the tip is a Y-shaped opening and the tip is made of elastic material, the Y-shaped opening of the tip is fitted with the diameter of the guide wire of the intramedullary nail, the fine-tuning needle body is a long cylinder, and the tip passes through The fine-tuning pinhole is away from the end of the T-shaped handshake, and the fine-tuning pin body goes out of the fine-tuning pinhole and is close to the end of the T-shaped handshake; The pulling structure includes a pulling rod and a lifting sleeve. The lifting sleeve is a cylindrical sleeve body with a diameter larger than the outer diameter of the fine-tuning needle body and a hollow inside. One end of the pull rod passes through the pull rod hole away from the end of the T-shaped handshake and is hinged with the middle part of the outer side of the lifting sleeve. The other end of the pulling rod passes through the pulling rod hole. The tip of the traction fine-tuning needle is fitted with the end of the guide wire of the intramedullary nail that goes out of the guide wire hole of the intramedullary nail and away from the T-shaped handshake. 2. An intramedullary nail guide capable of fine-tuning according to claim 1, wherein the intramedullary nail guide further comprises an angle fine-tuning knob, a telescopic fine-tuning knob, an angle fine-tuning gear and a telescopic fine-tuning gear , the angle fine-tuning knob is set at the end of the pull rod hole close to the T-shaped handshake, the telescopic fine-tuning knob is set at the end of the fine-tuning pin hole close to the T-shaped handshake, the fine-tuning needle body is a long cylinder with threads on the surface, and the pull rod is outside the body. Set the thread, the angle fine-tuning gear corresponds to the thread on the outer surface of the pull rod and is movably connected with it, the telescopic fine-tuning gear corresponds to the thread on the outer surface of the fine-tuning needle and is movably connected with it, the angle fine-tuning knob is connected with the axis of the angle fine-tuning gear, and the telescopic fine-tuning knob Connect with the telescopic fine-tuning gear shaft. 3. An intramedullary nail guide capable of fine adjustment according to claim 1, characterized in that the hole of the guide wire of the intramedullary nail is concentric with the outer surface of the long cylindrical body side wall of the main body of the intramedullary nail guide, and is pulled. The rod hole and the fine adjustment pin hole are eccentric holes. 4 . The intramedullary nail guide capable of fine adjustment according to claim 1 , wherein the fine adjustment needle body, the pulling rod, the lifting sleeve and the main body of the intramedullary nail guide are made of stainless steel. 5 . 5 . The intramedullary nail guide capable of fine adjustment according to claim 1 , wherein the tip of the fine adjustment needle is made of rubber. 6 .

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