CN210019522U

CN210019522U - Supplementary bone drilling director of wrist arthroscope

Info

Publication number: CN210019522U
Application number: CN201920190334.8U
Authority: CN
Inventors: 刘育杰; 任胜全
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-02-11
Filing date: 2019-02-11
Publication date: 2020-02-07
Anticipated expiration: 2029-02-11

Abstract

The utility model discloses a wrist arthroscope auxiliary bone drilling guider, which comprises a positioning mechanism and a guiding mechanism, wherein an arc-shaped positioner is fed into the wrist joint cavity through an arthroscope approach, the positioner is arranged at the position of a hole to be drilled in the ulna, the radius or the scaphoid, the guiding mechanism is arranged outside the ulna, the radius or the scaphoid and consists of a straight sliding rod and a guider capable of sliding on the sliding rod, a fastening bolt is rotated to adjust the position of the guider on the sliding rod, one end provided with an elastic pad can be contacted with the ulna and the radius, small teeth can be clamped with the ulna and the radius, the position deviation brought by drilling the hole is avoided, the operation accuracy is improved, the device has small volume, simple structure and easy later-stage cleaning and maintenance, the guiding function can ensure that the positioning kirschner wire can enter the position in the joint cavity more accurately in an arthroscope small observation window, the success rate of the operation is improved, and the pain of the patient is reduced.

Description

Supplementary bone drilling director of wrist arthroscope

Technical Field

The utility model relates to the technical field of medical equipment, specifically be a supplementary bone drilling director of wrist arthroscope.

Background

The wrist joint is important for improving the functions of hands, and with the development of society, traffic accidents and sports injuries are increased day by day, and patients with wrist joint injuries are increased. The two most common diseases in wrist joint injury are injury to the carpal fiber triangular cartilage complex (TFCC) and fracture of the scaphoid.

TFCC injury is the most common cause of traumatic carpal ulnar pain, and seriously affects the grip strength and rotation of the patient. The abnormal conservative treatment or the serious injury often causes the disease to be gradually aggravated, even is classified as chronic pain, and the function of the affected limb is seriously influenced.

Scaphoid fracture accounts for about 80% -89% of carpal fracture, and due to the special blood supply characteristics of scaphoid and the unique anatomical position and function in carpal arrangement, improper treatment of scaphoid fracture often causes scaphoid nonunion, osteonecrosis, unstable wrist joint and the like, and finally, pain of wrist joint and function loss of wrist joint in different degrees, even traumatic arthritis occurs, and the life quality of a patient is seriously affected.

Among the two common wrist joint diseases, the repair of TFCC and scaphoid fracture fixation with the aid of a wrist arthroscope technique are the latest techniques at present. TFCC and scaphoid are both blood-poor tissues anatomically, the self healing capability is poor, and the blood circulation damage is further aggravated by the traditional open surgery, so that the healing is more difficult, and the recovery time is prolonged. In recent years, due to the assistance of a wrist arthroscope, medical staff can finish TFCC repair and accurate reduction of scaphoid fracture under direct vision, blood circulation of the TFCC repair and the scaphoid fracture is damaged to the minimum extent, and early healing is achieved. The core of the wrist arthroscope is that the wrist arthroscope is accurately positioned under a minimally invasive small viewing window, namely, a guide pin is accurately driven into an ulna bone hole at an ulna fovea after debridement to facilitate suture repair of TFCC after reduction of scaphoid fracture, and an oblique bone hole is accurately driven into a radius far end to facilitate suture repair of TFCC after debridement for TFCC injury (Palmar ID type). Accurate driving into the bone hole is directly related to the final effect of the repair.

At present, research and development of related auxiliary instruments under a wrist arthroscope are not sufficient, and related positioning products are not seen in the medical market so as to be convenient for accurately driving a bone positioning guide pin under an extremely small operating window of the arthroscope. In clinical work, the X-ray assistance and the experience of operators are still needed for carrying out multiple evaluations, so that the operation time is greatly prolonged, the operation efficiency is obviously reduced, and the patients and the operators are exposed to multiple radioactive rays, thereby bringing unnecessary radiation damage.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a wrist arthroscope auxiliary bone drilling guider, which has the advantages of avoiding the position deviation easily brought by drilling a bone hole, adjusting the position of an elastic cushion through a transverse rotating shaft, meeting the requirements of guiding different positions of bone diameters, improving the precision degree of operation, having small volume, simple structure, being easy to clean and maintain in later period, leading the position of a Kirschner wire entering a joint cavity to be more accurate due to the guiding function, improving the success rate of operation, reducing the pain of patients, solving the problem of insufficient research and development of related auxiliary instruments under the wrist arthroscope in the prior art, not seeing related positioning products in the medical market so as to accurately squeeze a bone positioning guide pin under the extremely small operating window of the arthroscope, still needing to carry out multiple evaluations by means of X-ray assistance and the experience of operators in clinical work, greatly prolonging the operation time, obviously reducing the operation efficiency, the patient and the operator are exposed to a plurality of times of radioactive rays, which brings about the problem of unnecessary radiation damage.

In order to achieve the above object, the utility model provides a following technical scheme: a wrist arthroscope auxiliary bone drilling guider comprises a positioning mechanism and a guiding mechanism, wherein the positioning mechanism is fixedly connected with the guiding mechanism, the positioning mechanism comprises an arc-shaped positioner and a positioner blocking protrusion, the positioner blocking protrusion is arranged to be of a round platform structure, the diameter of the top of the positioner blocking protrusion is smaller than that of the bottom of the positioner blocking protrusion, the positioner blocking protrusion is fixed at the tip part of the arc-shaped positioner, the tip part of the arc-shaped positioner is arranged to be smooth, the arc-shaped positioner is arranged to be of an arc-shaped cylinder structure with a large root diameter and a small tip diameter, the root of the arc-shaped positioner is fixedly connected with the guiding mechanism, the guiding mechanism comprises a sliding rod, a guider, a fastening bolt, an offset groove, a sliding rod mounting hole, an inner thread groove, a transverse rotating shaft and an elastic cushion, the elastic cushion is fixedly mounted at one end of the transverse rotating shaft, horizontal rotation axis and internal thread groove swing joint with the external screw thread, the internal thread groove sets up to the cylinder structure, the inside at the skew groove is fixed to the internal thread groove, and the outer wall of internal thread groove is tangent with the arc inner wall in skew groove, the skew trench is located the inside of director, the slide bar mounting hole has been seted up to the upper and lower bottom surface of director, the inside of slide bar mounting hole is equipped with the slide bar, the outer wall of slide bar passes through fastening bolt and director swing joint, the bottom of slide bar and the root fixed connection of arc locator.

Preferably, the guide means is provided at a distance of 3mm in both up and down movement of the slide bar.

Preferably, the center line of the transverse rotating shaft and the center line of the guider are parallel to each other and do not coincide with each other, and the cross-sectional diameter dimension of the transverse rotating shaft is smaller than the cross-sectional radius dimension of the guider.

Preferably, the distance between the arc positioner and the sliding rod is set to be 6 cm.

Preferably, the height of the slide bar is set to 5 cm.

Short, and small teeth are arranged on the elastic pad.

Compared with the prior art, the beneficial effects of the utility model are as follows:

the wrist arthroscope auxiliary bone drilling guider feeds an arc-shaped positioner into a wrist joint cavity through an arthroscope approach, the positioner is arranged at the position of a hole to be drilled in the ulna, the radius or the scaphoid, a guide mechanism is positioned outside skin and flesh and consists of a straight sliding rod and a guider capable of sliding on the sliding rod, a fastening bolt is rotated to adjust the position of the guider on the sliding rod, one end provided with an elastic pad can be contacted with the ulna and the radius bone surface, a small tooth can be clamped with the ulna and the radius bone surface, and the position deviation easily caused by drilling the hole is avoided, the position of the elastic cushion is adjusted through the transverse rotating shaft, the guiding requirements of different bone diameters are met, the precision degree of the operation is improved, the device has small volume and simple structure, is easy to clean and maintain in the later period, the guiding function of the device ensures that the position of the Kirschner wire entering the joint cavity is more accurate, the success rate of the operation is improved, and the pain of a patient is reduced.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic side view of the guide of the present invention;

FIG. 3 is a schematic cross-sectional view of the internal components of the guider according to the present invention;

fig. 4 is a schematic view of the elastic cushion of the present invention.

In the figure: 1. a positioning mechanism; 11. an arc positioner; 12. a locator catch; 2. a guide mechanism; 21. a slide bar; 22. a guide; 23. fastening a bolt; 24. an offset slot; 25. a slide bar mounting hole; 26. an internal thread groove; 27. a transverse rotation axis; 28. an elastic pad; 281. small teeth.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, a wrist arthroscope auxiliary bone drilling guide comprises a positioning mechanism 1 and a guide mechanism 2, the positioning mechanism 1 is fixedly connected with the guide mechanism 2, the positioning mechanism 1 comprises an arc-shaped positioner 11 and a positioner retaining protrusion 12, the positioner retaining protrusion 12 is in a round table structure, the top diameter of the positioner retaining protrusion 12 is smaller than the bottom diameter of the positioner retaining protrusion 12, the positioner retaining protrusion 12 is fixed at the tip part of the arc-shaped positioner 11, the tip part of the arc-shaped positioner 11 is in a smooth shape, the arc-shaped positioner 11 is in an arc-shaped cylinder structure with a large root diameter and a small tip diameter, the root of the arc-shaped positioner 11 is fixedly connected with the guide mechanism 2, the guide mechanism 2 comprises a sliding rod 21, a guide 22, a fastening bolt 23, an offset groove 24, a sliding rod mounting hole 25, an internal thread groove 26, a transverse rotating shaft 27 and an elastic pad 28, an elastic pad 28 is fixedly installed at one end of a transverse rotating shaft 27, an external thread is arranged on the outer wall of the transverse rotating shaft 27, the transverse rotating shaft 27 with the external thread is movably connected with an internal thread groove 26, the internal thread groove 26 is set to be a cylindrical structure, the internal thread groove 26 is fixed inside an offset groove 24, the outer wall of the internal thread groove 26 is tangent to the arc inner wall of the offset groove 24, the offset groove 24 is positioned inside a guider 22, the upper bottom surface and the lower bottom surface of the guider 22 are provided with sliding rod installation holes 25, a sliding rod 21 is arranged inside the sliding rod installation hole 25, the outer wall of the sliding rod 21 is movably connected with the guider 22 through a fastening bolt 23, the bottom of the sliding rod 21 is fixedly connected with the root of the arc positioner 11, the up-down moving distance of the guider 22 on the sliding rod 21 is set to be 3mm, and the central line of the, the cross-sectional diameter dimension of the transverse rotating shaft 27 is smaller than the cross-sectional radius dimension of the guide 22, the distance between the arc positioner 11 and the sliding rod 21 is set to 6cm, the height of the sliding rod 21 is set to 5cm, and the small teeth 281 are installed on the elastic pad 28.

The working principle is as follows: the arc-shaped positioner 11 is fed into the wrist joint cavity through an arthroscope approach, the positioner retaining protrusion 12 is arranged at the position of a hole to be drilled in the ulna, the radius or the scaphoid, the guide mechanism 2 is positioned outside skin and flesh and consists of a straight sliding rod 21 and a guide 22 capable of sliding on the sliding rod, the position of the guide 22 on the sliding rod 21 is adjusted by rotating a fastening bolt 23, one end provided with an elastic cushion 28 can be in contact with the ulna and the radius, and the small teeth 281 can be clamped with the ulna and the radius, so that the position deviation easily caused by drilling the hole is avoided.

In summary, the following steps: the wrist arthroscope auxiliary bone drilling guider feeds an arc-shaped positioner 11 into a wrist joint cavity through an arthroscope approach, a positioner retaining protrusion 12 is arranged at a position of a hole to be drilled in an ulna, a radius or a scaphoid, a guide mechanism 2 is positioned outside skin and flesh and consists of a straight sliding rod 21 and a guider 22 capable of sliding on the sliding rod, a fastening bolt 23 is rotated to adjust the position of the guider 22 on the sliding rod 21, one end provided with an elastic cushion 28 can be contacted with the ulna and the radius bone surface, a small tooth 281 can be tightly clamped with the ulna and the radius bone surface to avoid position deviation easily caused by drilling the hole, the position of the elastic cushion 28 is adjusted through a transverse rotating shaft 27, the inner part of the transverse rotating shaft 27 is hollow, a Kirschner wire penetrates through the inner part of the transverse rotating shaft 27, the inner diameter of the transverse rotating shaft 27 is not less than 0.8mm, the guiding requirements of different bone diameters are met, the precision of an operation is improved, the device is small in volume, simple structure, the clearance of easy later stage is maintained, and its guide effect makes to beat the position that the kirschner wire got into articular intracavity portion more accurate, improves the operation success rate, reduces patient's misery.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a supplementary bone drilling director of wrist arthroscope, includes positioning mechanism (1) and guiding mechanism (2), positioning mechanism (1) and guiding mechanism (2) fixed connection, its characterized in that: the positioning mechanism (1) comprises an arc-shaped positioner (11) and a positioner retaining protrusion (12), the positioner retaining protrusion (12) is of a circular truncated cone structure, the diameter size of the top of the positioner retaining protrusion (12) is smaller than that of the bottom of the positioner retaining protrusion (12), the positioner retaining protrusion (12) is fixed at the tip part of the arc-shaped positioner (11), the tip part of the arc-shaped positioner (11) is of a smooth shape, the arc-shaped positioner (11) is of an arc-shaped cylinder structure with a large root diameter and a small tip diameter, the root of the arc-shaped positioner (11) is fixedly connected with a guide mechanism (2), the guide mechanism (2) comprises a sliding rod (21), a guide device (22), a fastening bolt (23), an offset groove (24), a sliding rod mounting hole (25), an internal thread groove (26), a transverse rotating shaft (27) and an elastic pad (28), and the elastic pad (28) is fixedly installed at one end of the transverse rotating shaft (27), the outer wall of the transverse rotating shaft (27) is provided with an external thread, the transverse rotating shaft (27) with the external thread is movably connected with an internal thread groove (26), the internal thread groove (26) is arranged to be of a cylindrical structure, the internal thread groove (26) is fixed inside a deviation groove (24), the outer wall of the internal thread groove (26) is tangent to the arc inner wall of the deviation groove (24), the deviation groove (24) is located inside a guider (22), sliding rod mounting holes (25) are formed in the upper bottom surface and the lower bottom surface of the guider (22), sliding rods (21) are arranged inside the sliding rod mounting holes (25), the outer wall of the sliding rods (21) is movably connected with the guider (22) through fastening bolts (23), and the bottoms of the sliding rods (21) are fixedly connected with the roots of the arc-shaped positioner (11).

2. A wrist arthroscopic auxiliary bone drill guide according to claim 1 wherein: the up-and-down movement distance of the guider (22) on the sliding rod (21) is set to be 3 mm.

3. A wrist arthroscopic auxiliary bone drill guide according to claim 1 wherein: the center line of the transverse rotating shaft (27) is parallel to and does not coincide with the center line of the guide (22), and the diameter size of the cross section of the transverse rotating shaft (27) is smaller than the radius size of the cross section of the guide (22).

4. A wrist arthroscopic auxiliary bone drill guide according to claim 1 wherein: the distance between the arc-shaped positioner (11) and the sliding rod (21) is set to be 6 cm.

5. A wrist arthroscopic auxiliary bone drill guide according to claim 1 wherein: the height of the sliding rod (21) is set to be 5 cm.

6. A wrist arthroscopic auxiliary bone drill guide according to claim 1 wherein: the elastic pad (28) is provided with small teeth (281).