A multifunctional extracorporeal intramedullary nail aiming frame

Abstract

The invention discloses a multifunctional external intramedullary nail aiming frame, which is characterized by comprising a handheld part, an adjusting part and a sleeve connected in sequence; an intramedullary nail connector is sleeved on the sleeve, and an internal thread is arranged inside the intramedullary nail connector; one end of the aiming device is connected to the adjusting part, and the other end extends to the top of the sleeve and is provided with an aiming port; the adjusting part is provided with an adjusting knob and an adjusting worm, the adjusting worm passes through the adjusting part and the sleeve and is rotatably connected with the adjusting part and / or the sleeve, one end of the adjusting worm is connected to the adjusting knob, and the other end is provided with an external thread, and one end provided with the external thread extends out of the sleeve and is connected with the intramedullary nail connector through the internal thread. The beneficial effect of the invention is that the transmission connection relationship between the internal and external threads is used to fine-tune the intramedullary nail in the axial direction, and the adjustment accuracy is high. The external hexagonal structure of the intramedullary nail connector facilitates the radial angle adjustment of the intramedullary nail, and is used for the aiming and installation of intramedullary nails of various specifications; the handheld part and the adjusting part are internally connected, which reduces the weight of the aiming frame.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to an aiming frame, and specifically relates to a multifunctional extracorporeal intramedullary nail aiming frame. Background Art

[0002] At present, intramedullary nails are mostly used clinically to treat fractures. This technology has little effect on the fracture ends and can achieve pressure on the fracture ends, which has many advantages. In the operation of installing intramedullary nails to treat fractures, an aiming frame and a screw sleeve are required to drive screws and lock screws into the intramedullary nails. The disadvantage is that in the prior art, one aiming frame is only equipped with one intramedullary nail. When the operation requires the implantation of multiple intramedullary nails, multiple sets of aiming frames need to be prepared, which takes a long time to prepare for the operation and is cumbersome to operate. The aiming frame has a complex structure, is not conducive to holding, and is not accurate enough. Summary of the invention

[0003] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a multifunctional extracorporeal intramedullary nail aiming frame, which has a simple structure, can adjust the position of the intramedullary nail, has high aiming accuracy, and can be used for a variety of intramedullary nails with different screw hole positions, eliminating the tedious operation of replacing multiple intramedullary nails.

[0004] To achieve the above object, the present invention adopts the following technical solution:

[0005] A multifunctional extracorporeal intramedullary nail aiming frame comprises a sight, and is characterized in that it also comprises a hand-held part, an adjusting part and a sleeve which are connected in sequence; an intramedullary nail connecting head is sleeved on the sleeve, and an internal thread is arranged in the intramedullary nail connecting head; one end of the sight is connected to the adjusting part, and the other end extends to the top of the sleeve and is provided with an aiming port; the adjusting part is provided with an adjusting knob and an adjusting worm, and the adjusting worm passes through the adjusting part and the sleeve and is rotatably connected to the adjusting part and / or the sleeve, one end of the adjusting worm is connected to the adjusting knob, and the other end is provided with an external thread, and the end provided with the external thread extends out of the sleeve and is connected to the intramedullary nail connecting head through the internal thread.

[0006] Furthermore, the cross-sectional shape of the adjustment part is an "H"-shaped cylindrical structure, the adjustment knob is arranged on a transverse axis, and equally divided grooves are arranged on the adjustment knob. The grooves facilitate hand contact and pinching during rotation, and at the same time cooperate with the adjustment part as a reference coordinate after the screw hole position is fixed.

[0007] Furthermore, the intramedullary nail connector is an outer hexagon, the size of which matches the inner hexagon inside the intramedullary nail.

[0008] Furthermore, a blocking piece is arranged on the intramedullary nail connector to limit the insertion depth when the intramedullary nail connector is inserted into the intramedullary nail.

[0009] Furthermore, the hand-held part is a hollow tube with two ends passing through, and the adjustment part is connected to the hand-held part. The hand-held part is set as a hollow tube structure to reduce the overall weight of the aiming frame and maintain its good hand feel. When the intramedullary nail implantation encounters resistance, the knocking tool can be brought into contact with the adjustment knob through the hand-held part, and a hammer can be used to knock to allow the intramedullary nail to smoothly enter the bone fixation position.

[0010] When in use, the operator holds the hand-held part, keeps the direction of the screw hole of the intramedullary nail vertically parallel to the aiming port, and inserts the intramedullary nail connector into the intramedullary nail. At this time, the position of the screw hole is determined by the hexagonal structure; if the screw hole is directly below the aiming port, the intramedullary nail is directly implanted; if it is not directly below the aiming port, the adjusting worm is driven to rotate by rotating the adjusting knob, and the intramedullary nail connector rotates radially and moves axially along the sleeve under the transmission of the external thread, thereby driving the fine adjustment of the intramedullary nail as a whole in the axial direction. When the position of the screw hole and the aiming device is determined, the intramedullary nail is removed and the direction of the screw hole is adjusted before inserting the intramedullary nail connector to achieve that the screw hole is directly below the aiming port; if resistance is encountered during implantation of the intramedullary nail, a knocking tool can be used to pass through the hand-held part and the connector to apply external force at the adjusting knob and other positions to push the screw; after pushing to the determined position, the aiming port cooperates with the screw tightening tool to screw the screw into the screw hole.

[0011] Compared with the prior art, the beneficial effect of the present invention is that the transmission connection relationship between the internal and external threads is used to fine-tune the intramedullary nail in the axial direction with high adjustment accuracy. The external hexagonal structure of the intramedullary nail connector facilitates the radial angle adjustment of the intramedullary nail and can be used for aiming and installing intramedullary nails of various specifications. The hand-held part and the adjustment part are internally connected to reduce the overall weight of the aiming frame and provide it with a good grip. When resistance is encountered during implantation, it can be pushed with the help of a knocking tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the specific implementation methods of the invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is a schematic diagram of the structure of the present invention.

[0014] Figure 2 It is a schematic diagram of the structure of the adjustment part of the present invention.

[0015] Figure 3 It is a schematic diagram of the structure of the adjusting worm of the present invention.

[0016] In the figure: 1- aimer 2- handheld part 3- adjusting part 4- intramedullary nail connecting head 5- aiming port 6- adjusting knob 7- adjusting worm 8- external thread 9- axis 10- groove 11- intramedullary nail 12- blocking piece 13- screw. DETAILED DESCRIPTION

[0017] The technical solution of the invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the invention, not all of them. Based on the embodiments of the invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the invention.

[0018] like Figures 1 to 3 As shown, a multifunctional extracorporeal intramedullary nail aiming frame comprises a sight 1, which is characterized in that it also comprises a hand-held part 2, an adjusting part 3 and a sleeve which are connected in sequence; an intramedullary nail connector 4 is sleeved on the sleeve, and an internal thread is arranged in the intramedullary nail connector 4; one end of the sight 1 is connected to the adjusting part 3, and the other end extends to the top of the sleeve and is provided with an aiming port 5; the adjusting part 3 is provided with an adjusting knob 6 and an adjusting worm 7, the adjusting worm 7 passes through the adjusting part 3 and the sleeve and is rotatably connected to the adjusting part 3 and / or the sleeve, one end of the adjusting worm 7 is connected to the adjusting knob 6, and the other end is provided with an external thread 8, and one end provided with the external thread 8 extends out of the sleeve and is connected to the intramedullary nail connector 4 through an internal thread.

[0019] like Figure 2 As shown, the cross-sectional shape of the adjusting portion 3 is an "H"-shaped cylindrical structure, the adjusting knob 6 is arranged on the transverse axis 9, and equally divided grooves 10 are arranged on the adjusting knob 6. The grooves 10 facilitate hand contact and pinching during rotation, and at the same time cooperate with the adjusting portion 3 as a reference coordinate after the screw hole position is fixed.

[0020] like Figure 2 As shown, the intramedullary nail connector 4 is an outer hexagon, and its size matches the inner hexagon inside the intramedullary nail 11 .

[0021] like Figure 2 As shown, a blocking piece 12 is provided on the intramedullary nail connector 4 to limit the insertion depth when the intramedullary nail connector 4 is inserted into the intramedullary nail 11 .

[0022] The hand-held part 2 is a hollow tube with two ends through, and the adjustment part 3 is connected to the hand-held part 2. The hand-held part 2 is set as a hollow tube structure to reduce the overall weight of the aiming frame and maintain its good hand feel. When the implantation of the intramedullary nail 11 encounters resistance, the knocking tool can be brought into contact with the adjustment knob 6 through the hand-held part 2, and a hammer can be used to knock to make the intramedullary nail 11 smoothly enter the bone fixation position.

[0023] When in use, the operator holds the handheld portion 2, keeps the direction of the screw hole of the intramedullary nail 11 vertically parallel to the aiming port 5, and inserts the intramedullary nail connector 4 into the intramedullary nail 11. At this time, the position of the screw hole is determined by the hexagonal structure; if the screw hole is directly below the aiming port 5, the intramedullary nail is directly implanted; if it is not directly below the aiming port 5, the adjusting worm 7 is driven to rotate by rotating the adjusting knob 6, and the intramedullary nail connector 4 rotates radially and moves axially along the sleeve under the transmission of the external thread 8, thereby driving the fine adjustment of the intramedullary nail as a whole in the axial direction. When the position of the screw hole and the aiming device 1 is determined, the intramedullary nail 11 is removed and the direction of the screw hole is adjusted before inserting the intramedullary nail connector 4 to achieve that the screw hole is directly below the aiming port 5; if resistance is encountered during implantation of the intramedullary nail, a knocking tool can be used to pass through the handheld portion 2 and the connecting portion to apply external force at the adjusting knob 6 and other positions to push it; after pushing to the determined position, the aiming port 5 cooperates with the screw tightening tool to screw the screw 13 into the screw hole.

[0024] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multifunctional extracorporeal intramedullary nail aiming frame, comprising an aiming device, characterized in that It also includes a hand-held part, an adjustment part and a sleeve which are connected in sequence; the sleeve is sleeved with an intramedullary nail connector, and an internal thread is arranged in the intramedullary nail connector; one end of the sight is connected to the adjustment part, and the other end extends to the top of the sleeve and is provided with an aiming port; the adjustment part is provided with an adjustment knob and an adjustment worm, and the adjustment worm passes through the adjustment part and the sleeve and is rotationally connected to the adjustment part and / or the sleeve, one end of the adjustment worm is connected to the adjustment knob, and the other end is provided with an external thread, and the end provided with the external thread extends out of the sleeve and is connected to the intramedullary nail connector through the internal thread, the cross-sectional shape of the adjustment part is an "H"-shaped cylindrical structure, the adjustment knob is arranged on the transverse axis, and an equally divided groove is arranged on the adjustment knob, and the intramedullary nail connector is an external hexagon, and the size matches the internal hexagon inside the intramedullary nail.

2. The multifunctional extracorporeal intramedullary nail aiming frame according to claim 1, characterized in that: The intramedullary nail connector is provided with a blocking piece, and when the intramedullary nail connector is inserted into the intramedullary nail, the insertion depth is limited.

3. A multifunctional extracorporeal intramedullary nail aiming frame according to any one of claims 1 to 2, characterized in that: The hand-held part is a hollow cylinder with two ends connected, and the adjustment part is connected to the hand-held part.

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