CN213641152U

CN213641152U - Distal locking fine-adjustment aiming device for interlocking intramedullary nail

Info

Publication number: CN213641152U
Application number: CN202020915690.4U
Authority: CN
Inventors: 彭昌贵
Original assignee: Dongguan Shijie Hospital
Current assignee: Dongguan Shijie Hospital
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2021-07-09
Anticipated expiration: 2030-05-26

Abstract

The utility model relates to the field of medical equipment, in particular to an interlocking intramedullary nail distal end locking fine-adjustment aiming device. Comprises a hollow sleeve, a rod-shaped needle, a locking device and an adjusting nut; further comprising: the number of the speculums arranged on the intramedullary nail drill sleeve is at least two, and the speculums are provided with long rods; when the intramedullary nail sighting device is used, the two long rods of the perspective device and the intramedullary nail guide pin are kept in the same plane by rotating the adjusting nut, and the sighting is finished. The beneficial effects of the utility model are that, at first, aim through the perspective ware, can conveniently judge whether the intramedullary nail sleeve aims at the intramedullary nail. Secondly, the rod-shaped needle does not need to press the intramedullary nail, only needs to contact with bone, and changes the relative position between the intramedullary nail positioning rod and the intramedullary nail far end through adjusting the nut, so that the intramedullary nail sleeve can aim at the intramedullary nail lock hole, thereby ensuring the successful locking of the interlocking intramedullary nail far end.

Description

Distal locking fine-adjustment aiming device for interlocking intramedullary nail

Technical Field

The utility model relates to the field of medical equipment, in particular to an interlocking intramedullary nail distal end locking fine-adjustment aiming device.

Background

The method can protect periosteum and soft tissue blood circulation around the fracture to the maximum extent by selecting a proper treatment method in the fracture treatment, and the minimally invasive implantation of an internal fixture can promote fracture healing, so that the interlocking intramedullary nail is widely applied to the internal fixation of long bone stem fracture, the interlocking intramedullary nail needs to be locked at a far end, and the main methods for locking the far end at present comprise the following methods: mechanical arm aiming device (far end positioning rod fixation), bare-handed locking technology (blind lock), intramedullary drill (core drill), electromagnetic navigation and the like. The manual blind locking method needs repeated fluoroscopy, has large radiation amount and long time consumption, is used by domestic clinicians less and is a remedy method after other locking is unsuccessful, and the intramedullary drilling and laser magnetic navigation method cannot be popularized due to high equipment price. The existing common method is an instrument arm aiming locking method, which is to perform positioning through a three-dimensional compression bar only by successfully pressing the compression bar, while a cross-locking intramedullary nail is relatively long and cannot be completely matched with a medullary cavity in a human body long diaphysis, so that deformation occurs, the distal compression bar is unsuccessful, and the distal end cannot be locked.

SUMMERY OF THE UTILITY MODEL

The invention of the utility model aims to: aiming at the problems of the existing three-dimensional compression bar positioning technology, the distal locking fine-adjustment aiming device of the interlocking intramedullary nail is convenient to use, simple in structure and capable of accurately locking the distal locking nail without a compression bar.

In order to achieve the above object, the present invention provides the following technical solutions:

a distal locking fine-adjustment aiming device of an interlocking intramedullary nail comprises an intramedullary nail positioning rod and an intramedullary nail guide pin, and the device comprises a hollow sleeve, a screw thread and a guide pin, wherein the outer surface of the hollow sleeve is provided with the screw thread; a rod-shaped needle which passes through the hollow sleeve and applies acting force to bone; the locking device is detachably arranged on the hollow sleeve and used for fixing the relative position of the hollow sleeve and the rod-shaped needle; the adjusting nut is in threaded fit with the hollow sleeve and is used for installing the hollow sleeve on the intramedullary nail positioning rod; further comprising: the number of the speculums is at least two, and the speculums are provided with long rods; when the adjusting nut is used, the adjusting nut is rotated to adjust the upper and lower positions of the positioning rod of the intramedullary nail, so that the long rod of the perspective device and the guide pin of the intramedullary nail are positioned on the same plane.

The utility model discloses if have two points on utilizing the straight line in certain plane, the principle in this plane is promptly to the straight line so, makes the accurate quick location of distal end lockhole. The doctor can conveniently judge whether the intramedullary nail sleeve is aligned with the intramedullary nail through aiming of the perspective device, so as to realize the accurate positioning of the intramedullary nail locking sleeve and the intramedullary nail distal lock hole and ensure the successful distal locking of the interlocking intramedullary nail. When the distal end of the intramedullary nail is difficult to lock due to the deformation of the intramedullary nail, the relative position between the intramedullary nail positioning rod and the distal end of the intramedullary nail is changed by adjusting the nut, so that the intramedullary nail sleeve aims at the locking hole of the intramedullary nail, and the successful locking of the distal end of the interlocking intramedullary nail is ensured.

As the preferred scheme of the utility model, locking device includes: the locking bolt is connected with the locking nut through threads.

By adopting the mode, after the locking bolt is screwed down, the screw rod of the locking bolt presses the rod-shaped needle to the inner wall of the hollow sleeve, so that the relative position of the hollow sleeve and the rod-shaped needle is fixed, and the locking purpose is achieved.

As the utility model discloses a preferred scheme, locking bolt still includes the knob, and the knob surface is equipped with the line.

As the preferred scheme of the utility model, be equipped with the round hole that is used for installing the lever on the knob.

By adopting the mode, the locking bolt further comprises the knob, the knob increases the tightening torque, and the rod-shaped needle can be firmly locked. The knob surface lines prevent slipping when the nut is screwed by hands, and the rod-shaped needle can be further ensured to be locked firmly. The knob is provided with a round hole for installing the lever, so that the lever can be inserted, and the physical strength of medical staff can be saved when the knob is screwed down; and the lever increases the tightening torque, so that the rod-shaped needle can be ensured to be reliably locked.

As the preferred scheme of the utility model, adjusting nut is equipped with the line.

As the utility model discloses a preferred scheme is equipped with the round hole that is used for installing the lever on the adjusting nut.

By adopting the mode, the adjusting nut is provided with the lines to prevent the hand from slipping when the nut is screwed, and the rod-shaped needle can be firmly locked. The adjusting nut is provided with a round hole for installing the lever, so that the lever can be inserted, and the physical strength of medical personnel can be saved by screwing the adjusting nut through the lever.

As the optimal proposal of the utility model, the perspective device is also provided with a U-shaped structure matched with the intramedullary nail locking sleeve, and the valley bottom of the U-shaped structure is connected with one end of the long rod of the perspective device, so that the whole perspective device is Y-shaped. After the mounting and the adaptation, the axis of the long rod of the perspective device and the axis of the intramedullary nail locking sleeve are positioned on the same plane.

By adopting the mode, the U-shaped structure is matched with the intramedullary nail locking sleeve, so that the perspective device can be conveniently and detachably fixed on the intramedullary nail locking sleeve. After the mounting and the adaptation, the axis of the long rod of the perspective device and the axis of the intramedullary nail locking sleeve are positioned on the same plane; therefore, as long as the end points of the long-bar rods of the more than two perspective devices and the end points of the intramedullary nail are in the same plane, the end points of the intramedullary nail and the intramedullary nail locking sleeve are ensured to be in the same plane, and the intramedullary nail sleeve is aimed at the intramedullary nail, so as to ensure the successful locking of the distal end of the interlocking intramedullary nail.

As the preferred scheme of the utility model, the rod-shaped needle is the Kirschner wire. The kirschner wire is a daily-use instrument for orthopedics department, is mainly used for fixation, and has a simple structure but is practical.

As the preferred scheme of the utility model, lock nut's axis with hollow sleeve's axis is perpendicular, constitutes T shape. The axis of the locking nut is perpendicular to the axis of the hollow sleeve, so that the locking bolt can be ensured to vertically press the Kirschner wire; the locking nut is transversely arranged at one end of the hollow sleeve, so that medical personnel can select to screw the locking bolt into any one of the two openings of the locking nut, and the operation is convenient.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. whether the intramedullary nail sleeve is aligned with the intramedullary nail or not can be conveniently judged through sighting of the perspective device, so that accurate positioning between the intramedullary nail locking sleeve and the distal end of the intramedullary nail is realized, and the successful locking of the distal end of the interlocking intramedullary nail is ensured.

2. When the intramedullary nail is deformed to cause the difficulty of distal interlocking locking, the intramedullary nail sleeve can be aimed at the intramedullary nail by changing the relative position between the intramedullary nail guide pin and the intramedullary nail positioning rod through the adjusting nut without using a pressure rod, thereby ensuring the success of distal interlocking locking of the interlocking intramedullary nail.

Drawings

FIG. 1 is a schematic view of the present invention in use;

FIG. 2 is a schematic structural view of the hollow sleeve of the present invention;

fig. 3 is a schematic structural view of the locking bolt of the present invention;

fig. 4 is a schematic structural view of the adjusting nut of the present invention;

FIG. 5 is a schematic view of the perspective device of the present invention;

the following are marked in the figure: 101-hollow sleeve, 110-adjusting nut, 111-lever round hole, 120-locking bolt, 121-locking nut, 122-knob, 130-rod-shaped needle 140-perspective device, 141-long rod, 142-U-shaped structure, 150-intramedullary nail locking sleeve, 160-drill, 170-intramedullary nail, 180-intramedullary nail positioning rod and 190-intramedullary nail guide needle.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Example 1, as shown in figures 1-5:

a distal locking fine-adjustment aiming device for an interlocking intramedullary nail comprises a hollow sleeve 101, a screw thread and a screw rod, wherein the outer surface of the hollow sleeve is provided with the screw thread; a rod-shaped needle 130 which passes through the hollow sleeve 101 and applies a force to the bone; a locking device detachably mounted on the hollow sleeve 101 for fixing the relative position of the hollow sleeve 101 and the rod-shaped needle 130; the adjusting nut 110 is in threaded fit with the hollow sleeve 101 and is used for installing the hollow sleeve 101 on the intramedullary nail positioning rod 180; further comprising: at least two perspective devices 140 are arranged on the intramedullary nail drill sleeve, and the perspective devices 140 are provided with long rods 141; when in use, the up-and-down position of the intramedullary nail positioning rod is adjusted by the adjusting nut 110, so that the intramedullary nail guide pin 190 and the long rod 141 of the perspective device 140 are positioned on the same plane.

The utility model discloses, the doctor aims through perspective ware 140, can conveniently judge whether intramedullary nail locking sleeve 150 aims at intramedullary nail 170 to realize the accurate positioning between intramedullary nail locking sleeve 150 and the intramedullary nail 170 distal end, guarantee that the distal end locking of interlocking intramedullary nail 170 is successful. When the intramedullary nail 170 is deformed to cause difficulty in distal interlocking and locking, the relative position between the intramedullary nail positioning rod 180 and the distal end of the intramedullary nail 170 is changed by adjusting the nut 110, so that the intramedullary nail sleeve is aimed at the intramedullary nail 170, and the distal end of the interlocking intramedullary nail 170 is successfully locked.

In addition to the above embodiments, as a preferred embodiment, the locking device includes: a locking bolt 120 and a locking nut 121 arranged at one end of the hollow sleeve 101, wherein the locking bolt 120 and the locking nut 121 are coupled by screw threads.

By adopting the mode, after the locking bolt 120 is screwed down, the screw rod of the locking bolt 120 presses the rod-shaped needle 130 to the inner wall of the hollow sleeve 101, so that the relative position of the hollow sleeve 101 and the rod-shaped needle 130 is fixed, and the locking purpose is achieved.

On the basis of the above embodiment, as a preferred embodiment, the locking and locking bolt 120 further includes a knob 122, and the surface of the knob 122 is provided with grains.

In addition to the above embodiments, as a preferred embodiment, the knob 122 is provided with a round hole for attaching a lever.

In this way, the locking bolt 120 further includes a knob 122, and the knob 122 increases the tightening torque to ensure that the rod-shaped needle 130 can be locked firmly. The surface texture of the knob 122 prevents slippage when the nut is tightened by hand, further ensuring that the shaft pin 130 can be locked firmly. The knob 122 is provided with a round hole for installing the lever, so that the lever can be inserted, and the physical strength of medical staff can be saved when the knob 122 is screwed down; and, the lever increases the tightening torque, which can ensure that the rod-shaped needle 130 is reliably locked.

In addition to the above embodiments, as a preferred embodiment, the adjusting nut 110 is provided with a thread.

In addition to the above embodiments, as a preferred embodiment, the adjusting nut 110 is provided with a circular hole for attaching a lever.

In this manner, the adjusting nut 110 is provided with a pattern to prevent slippage when the nut is manually screwed, thereby ensuring that the shaft pin 130 can be locked firmly. The adjusting nut 110 is provided with a round hole for mounting a lever, so that the lever can be inserted, and thus, when the adjusting nut 110 is screwed, the physical strength of medical personnel can be saved.

In addition to the above embodiments, as a preferred embodiment, the perspective device 140 is further provided with a U-shaped structure 142 adapted to the intramedullary nail locking sleeve 150, and the valley of the U-shaped structure 142 is connected to one end of the long rod 141 of the perspective device 140, so that the perspective device 140 is Y-shaped as a whole. After fitting, the axis of elongate rod 141 of viewer 140 is in the same plane as the axis of intramedullary nail locking sleeve 150.

In this manner, the U-shaped structure 142 mates with the intramedullary nail locking sleeve 150 to facilitate detachably securing the perspective device 140 to the intramedullary nail locking sleeve 150. After fitting, the axis of the long rod 141 of the perspective device 140 and the axis of the intramedullary nail locking sleeve 150 are in the same plane; thus, as long as the elongated rods 141 of two or more of the speculums 140 are in the same plane as the intramedullary nail guide pin 190, the intramedullary nail guide pin 190 and the intramedullary nail locking sleeve 150 are ensured to be in the same plane, and the intramedullary nail sleeve is aimed at the intramedullary nail 170, so as to ensure that the distal end of the interlocking intramedullary nail 170 is successfully locked.

In addition to the above embodiments, the rod-shaped needle 130 is preferably a k-wire. The kirschner wire is a daily-use instrument for orthopedics department, is mainly used for fixation, and has a simple structure but is practical.

In addition to the above embodiments, as a preferred embodiment, the axis of the lock nut 121 is perpendicular to the axis of the hollow sleeve 101, and forms a T shape. The axis of the locking nut 121 is perpendicular to the axis of the hollow sleeve 101, so that the locking bolt 120 can be ensured to vertically press the Kirschner wire; the lock nut 121 is transversely arranged at one end of the hollow sleeve 101, so that medical staff can select to screw the lock bolt 120 from any one of the two openings of the lock nut 121, and the operation is convenient.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides an interlocking intramedullary nail distal end locking fine setting sighting device, includes intramedullary nail locating lever and intramedullary nail guide pin, its characterized in that, the device has:

the outer surface of the hollow sleeve is provided with threads;

a rod-shaped needle passing through the hollow sleeve against a bone surface;

the locking device is detachably arranged on the hollow sleeve and used for fixing and locking the relative position of the hollow sleeve and the rod-shaped needle;

the adjusting nut is in threaded fit with the hollow sleeve and is used for installing the hollow sleeve on the intramedullary nail positioning rod;

the device also has: the number of the perspective devices arranged on the intramedullary nail locking sleeve is at least two, and the perspective devices are provided with long rods matched with the intramedullary nail guide pins;

when the sighting telescope is used, the long rod of the perspective device and the intramedullary nail guide pin are kept in the same plane by rotating the adjusting nut, and the sighting is finished.

2. The interlocking intramedullary nail distal locking fine adjustment aiming device according to claim 1, wherein the locking device comprises: the locking bolt is connected with the locking nut through threads.

3. The interlocking intramedullary nail distal locking fine adjustment aiming device according to claim 2, wherein the locking bolt further comprises a knob, and the surface of the knob is provided with anti-slip lines.

4. The interlocking intramedullary nail distal locking fine adjustment aiming device according to claim 3, wherein the knob is provided with a round hole for mounting a lever.

5. The interlocking intramedullary nail distal locking fine adjustment aiming device according to claim 4, wherein the surface of the adjusting nut is provided with anti-slip lines.

6. The interlocking intramedullary nail distal locking fine adjustment aiming device according to claim 5, wherein the adjusting nut is provided with a round hole for mounting a lever.

7. The interlocking intramedullary nail distal locking fine adjustment aiming device according to any one of claims 2 to 6, wherein the perspective device is further provided with a U-shaped structure matched with the intramedullary nail locking sleeve, and the valley of the U-shaped structure is connected with one end of the long rod of the perspective device, so that the perspective device is Y-shaped as a whole; after the mounting and the adaptation, the axis of the long rod of the perspective device and the axis of the intramedullary nail locking sleeve are positioned on the same plane.

8. The interlocking intramedullary nail distal locking fine adjustment aiming device according to claim 7, wherein the rod-shaped needle is a kirschner wire.

9. The interlocking intramedullary nail distal locking fine adjustment aiming device according to claim 8, wherein the axis of the locking nut is perpendicular to the axis of the hollow sleeve, forming a T-shape.