CN211633539U

CN211633539U - Distal accurate locking device for tibial intramedullary nail

Info

Publication number: CN211633539U
Application number: CN202020098332.9U
Authority: CN
Inventors: 陈孝均; 罗焘; 谢霁; 邹永根
Original assignee: Affiliated Hospital of Traditional Chinese Medicine TCM of Southwest Medical University
Current assignee: Affiliated Hospital of Traditional Chinese Medicine TCM of Southwest Medical University
Priority date: 2020-01-16
Filing date: 2020-01-16
Publication date: 2020-10-09
Anticipated expiration: 2030-01-16

Abstract

The utility model provides an accurate locking device of shin bone intramedullary nail distal end relates to orthopedics medical instrument technical field, it includes the handle, the lower extreme and the upper end of handle can be dismantled respectively and be connected with the intramedullary nail and aim the arm, the handle is provided with a plurality of and the spacing joint portion of being connected of arm that aims on the up end of C type arm and handle, the distal end of aiming the arm is provided with wide section, the last sighting rod hole that is provided with three confession sighting rod and passes of wide section, the distal end integrated into one piece of aiming the arm has the support arm, the lower extreme of support arm is provided with interlocking nail sight. Solves the problem that the tibia interlocking intramedullary nail in the prior art is not easy to ensure the locking accuracy of the distal interlocking nail.

Description

Distal accurate locking device for tibial intramedullary nail

Technical Field

The utility model relates to the technical field of orthopedic medical equipment, in particular to an accurate locking device for the distal end of a tibial intramedullary nail.

Background

The internal fixation treatment of the tibial bone interlocking intramedullary nail for the tibial bone fracture is a universal method in China and China, has firm fixation, simple operation and good effect, and is well known. Tibial interlocking intramedullary nails typically include an intramedullary nail that is driven into the medullary cavity along the length of the tibial shaft, and then driven into the interlocking nail at the proximal and distal ends of the intramedullary nail. Before the distal interlocking nail is driven, the aiming rod is required to penetrate through the aiming arm to abut against a platform at the distal end of the intramedullary nail so as to ensure the accuracy of locking the distal interlocking nail. However, in actual operation, the sighting rod is not necessarily supported on the platform, sometimes is inclined inwards, sometimes is inclined outwards, and the interlocking nail is not accurately locked, so that multiple times of adjustment are needed, the operation efficiency is reduced, and the pain of a patient is increased.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned problem among the prior art, the utility model provides an accurate locking device of shin bone intramedullary nail distal end has solved the problem that shin bone interlocking intramedullary nail is difficult to guarantee distal end interlocking nail locking accuracy among the prior art.

In order to achieve the purpose of the invention, the technical scheme adopted by the utility model is as follows:

the utility model provides an accurate locking device of shin bone intramedullary nail distal end, it includes the handle, the lower extreme and the upper end of handle can be dismantled respectively and be connected with the intramedullary nail and aim the arm, the handle be provided with a plurality of and aim the spacing joint portion of being connected of arm on the up end of C type arm and handle, the distal end of aiming the arm is provided with wide section, the last sighting rod hole that is provided with three confession sighting rod and passes of wide section, the distal end integrated into one piece of aiming the arm has the support arm, the lower extreme of support arm is provided with interlocking nail sight.

Furthermore, the clamping portion is a plurality of sawtooth grooves arranged on the upper end face of the handle side by side, sawtooth bosses embedded into the sawtooth grooves are correspondingly arranged on the lower end face of the aiming arm, and locking screws are connected between the sawtooth grooves and the sawtooth bosses.

Further, the sighting rod hole includes the middle sighting rod hole that sets up side by side and distributes in outside sighting rod hole and the inboard sighting rod hole of middle sighting rod hole both sides, and middle sighting rod hole, outside sighting rod hole and inboard sighting rod hole are whole round holes.

Furthermore, a sighting sleeve is inserted in the sighting rod hole, a sighting rod is inserted in the sighting sleeve, and the sighting sleeve and the sighting rod are clamped on the sighting arm through a fixing frame. The fixing frame clamp comprises an upper transverse plate, a middle transverse plate and a lower transverse plate which are connected into a whole through a vertical plate, clamping holes with one open end are formed in the upper transverse plate, the middle transverse plate and the lower transverse plate, and the clamping holes cover all sighting rod holes.

The clamping hole on the upper transverse plate is clamped in the fixed clamping groove on the sighting rod and is tightly clamped; the diameters of the clamping holes in the middle transverse plate and the lower transverse plate are larger than those of the clamping holes in the upper transverse plate and are clamped on the aiming sleeves at the upper end and the lower end of the aiming arm, and the aiming arms can axially slide along the aiming sleeves. The bottom surface of the middle transverse plate is positioned on the upper end surface of the aiming arm, and the top surface of the lower transverse plate is tightly attached to the lower end surface of the aiming arm, so that the aiming rod and the aiming sleeve are stabilized through the connection effect of the fixing frame clamp, and the accuracy of nail feeding of the interlocking nail is improved.

Further, the widened portion is perpendicular to the length direction of the aiming arm, and the upper end face and the lower end face of the widened portion are respectively flush with the upper end face and the lower end face of the aiming arm.

The utility model has the advantages that: the intramedullary nail is connected with the aiming arm through the C-shaped arm, so that the relative position of the intramedullary nail and the aiming arm in the vertical direction is fixed; the relative position of intramedullary nail and aiming arm on the intramedullary nail length direction can be guaranteed to joint portion to guarantee that every time after the installation, the relative position of intramedullary nail and aiming arm is unique, with the condition of avoiding the sighting rod that leads to because of the assembly reason can't aim at the platform of intramedullary nail as far as possible to appear.

Because the intramedullary nail is driven into the medullary cavity and then the distal end interlocking nail is driven by the aiming arm, if the aiming rod cannot be abutted to the platform on the intramedullary nail, the adjustment cannot be carried out by adjusting the intramedullary nail and the aiming arm, the locking device in the scheme is provided with the widening part on the aiming arm to increase and arrange the outer aiming rod hole and the inner aiming rod hole, and when the aiming rod falls into the outer side of the platform, the aiming rod is inserted from the inner aiming rod hole again to be abutted to the platform; when the discovery sighting rod falls into the platform inboard, insert from outside sighting rod hole again with the sighting rod and just can the butt to the platform on, and then guaranteed to squeeze into the accuracy of interlocking nail through the interlocking nail sight, improved the convenience of operation, also improved the efficiency of operation.

Drawings

Fig. 1 is a schematic structural diagram of a distal precision locking device of a tibial intramedullary nail.

Fig. 2 is a schematic structural diagram of the distal precise locking device for the tibial intramedullary nail after the fixing frame clamp is removed.

Wherein, 1, a handle; 11. a clamping part; 2. intramedullary nails; 21. a platform; 3. an aiming arm; 31. a widening section; 32. a sighting rod hole; 321. a middle sighting rod hole; 322. an outboard sighting rod bore; 323. an inboard sighting rod bore; 4. a support arm; 5. an interlocking nail sight; 6. locking the screw; 7. a sighting rod; 8. a fixed frame card; 81. An upper transverse plate; 82. a middle horizontal plate; 83. a lower transverse plate; 84. a vertical plate; 85. and (6) clamping the hole.

Detailed Description

The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and various changes will be apparent to those skilled in the art as long as they are within the spirit and scope of the present invention as defined and defined by the appended claims, and all inventions contemplated by the present invention are protected.

As shown in fig. 1 and 2, the distal precision locking device for the tibial intramedullary nail comprises a handle 1, wherein an intramedullary nail 2 and an aiming arm 3 are detachably connected to the lower end and the upper end of the handle 1 respectively. Handle 1 is provided with a plurality of joints portions 11 with aim arm 3 spacing connection on the up end of C type arm and handle, and joint portion 11 is for setting up a plurality of sawtooth grooves on 1 up end of handle side by side, and the correspondence is provided with the sawtooth boss in the embedding sawtooth groove on aiming arm 3's the lower terminal surface, is connected with locking screw 6 between sawtooth groove and the sawtooth boss.

The distal end of the aiming arm 3 is provided with a widened portion 31, the widened portion 31 being perpendicular to the long axis direction of the aiming arm 3, the upper end surface and the lower end surface of the widened portion 31 being flush with the upper end surface and the lower end surface of the aiming arm 3, respectively.

Be provided with three sighting rod holes 32 that supply the sighting rod to pass through on the widened portion 31, sighting rod hole 32 includes middle sighting rod hole 321 and the outside sighting rod hole 322 and the inboard sighting rod hole 323 that distribute in middle sighting rod hole 321 both sides that set up side by side, and middle sighting rod hole 321, outside sighting rod hole 322 and inboard sighting rod hole 323 are whole round holes. The distance between the outer sighting rod hole 322 and the middle sighting rod hole 321 is determined according to the statistical data of the distance of the sighting rod outside the platform in clinic, and the distance between the inner sighting rod hole 323 and the middle sighting rod hole 321 is determined according to the statistical data of the distance of the sighting rod inside the platform in clinic. Aiming sleeve 9 is inserted into aiming rod hole 32, aiming rod 7 is inserted into aiming sleeve 9, and aiming sleeve 9 and aiming rod 7 are clamped on aiming arm 3 through fixing frame clamp 8. The fixing frame clamp 8 comprises an upper transverse plate 81, a middle transverse plate 82 and a lower transverse plate 83 which are connected into a whole through a vertical plate 84, clamping holes 85 with one ends opened are formed in the upper transverse plate 81, the middle transverse plate 82 and the lower transverse plate 83, and the length of each clamping hole 85 covers all the sighting rods. The clamping holes 85 on the upper transverse plate are used for clamping with the fixing clamping grooves on the sighting rod 7, and the clamping holes on the middle transverse plate and the lower transverse plate are clamped on the sighting sleeve 9 and can slide along the axial direction of the sighting sleeve 9.

The sighting rod hole 32 is a full-circle hole, which can improve the guiding effect of the sighting sleeve 9 inserted therein, and the effect of the sighting sleeve 9 is used for guiding the sighting rod 7, so that the accuracy of the sighting rod 7 abutting on the platform of the intramedullary nail 2 is improved.

The far end of aiming arm 3 is integrated into a whole to form a support arm 4, the support arm 4 extends from one side of aiming arm 3 to the plane where intramedullary nail 2 is located and then is connected with an interlocking nail aiming device 5, and the interlocking nail is driven into an interlocking nail hole reserved at the far end of intramedullary nail 2 in parallel in the direction perpendicular to the long axis of the intramedullary nail through the interlocking nail aiming device 5. Support arm 4 and aiming arm 3 integrated into one piece can avoid appearing assembly error influence interlocking nail's accuracy.

The locking device in the scheme is only suitable for the operation process of the right-side tibial intramedullary nail, and only the mirror-symmetrical locking device needs to be manufactured if the locking device is required to be applied to the operation process of the left-side tibial intramedullary nail.

Claims

1. The utility model provides an accurate locking device of shin bone intramedullary nail distal end, includes handle (1), the lower extreme and the upper end of handle (1) can be dismantled respectively and be connected with intramedullary nail (2) and aiming arm (3), a serial communication port, handle (1) be provided with on the up end of C type arm and handle a plurality ofly with aiming arm (3) spacing joint portion (11) of connecting, aiming arm (3)'s distal end is provided with wide section (31), be provided with sighting rod hole (32) that three confession sighting rod passed on wide section (31), aiming arm (3)'s distal end integrated into one piece has support arm (4), the lower extreme of support arm (4) is provided with interlocking nail sight (5).

2. The distal precise locking device of the tibial intramedullary nail according to claim 1, wherein the clamping portion (11) is a plurality of sawtooth grooves arranged side by side on the upper end surface of the handle (1), a sawtooth boss embedded in the sawtooth grooves is correspondingly arranged on the lower end surface of the aiming arm (3), and a locking screw (6) is connected between the sawtooth grooves and the sawtooth boss.

3. The distal precision locking device of tibial intramedullary nail according to claim 1, characterized in that said aiming rod holes (32) comprise a central aiming rod hole (321) arranged side by side and a lateral aiming rod hole (322) and a medial aiming rod hole (323) distributed on both sides of the central aiming rod hole (321), said lateral aiming rod hole (322) and said medial aiming rod hole (323) being all round holes.

4. The distal precision locking device of tibial intramedullary nail according to claim 1, characterized in that an aiming sleeve (9) is inserted in the aiming rod hole (32), an aiming rod (7) is inserted in the aiming sleeve (9), and the aiming sleeve (9) and the aiming rod (7) are fixed to the aiming arm (3) by a mount clip (8).

5. The distal precise locking device of the tibial intramedullary nail according to claim 4, wherein the fixing frame clamp (8) comprises an upper transverse plate (81), a middle transverse plate (82) and a lower transverse plate (83) which are connected into a whole through a vertical plate (84), clamping holes (85) with one open end are formed in the upper transverse plate (81), the middle transverse plate (82) and the lower transverse plate (83), and the length of each clamping hole (85) covers all the aiming rod holes (32).

6. The distal precision locking device of tibial intramedullary nail according to claim 5, characterized in that said widened portion (31) is perpendicular to the long axis direction of the aiming arm (3), the upper and lower end faces of said widened portion (31) being flush with the upper and lower end faces of the aiming arm (3), respectively.