CN2624839Y

CN2624839Y - Distal aiming device for intramedullary nail with lock

Info

Publication number: CN2624839Y
Application number: CN 03243210
Authority: CN
Inventors: 孙涛
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-03-20
Filing date: 2003-03-20
Publication date: 2004-07-14
Anticipated expiration: 2013-03-20

Abstract

The utility model discloses an intramedullary nail far end aiming mechanism attached with a lock, which comprises an intramedullary nail with a lock, an aiming outer bushing and an aiming rod, etc. Wherein, the intramedullary nail with a lock is provided with a screw hole at the end; the aiming outer bushing is in cylinder shape, whose upper end is an outer bushing locking bayonet and whose middle is provided with a locking hole for connecting the external sights and whose lower end is in arc shape and has a movable hatch clip at one side; the hatch clip is connected with manual draw open steel wires; upper end of the aiming rod is a locking bayonet and the lower end is provided with a screw thread. After the bone hole is well prepared, insert the aiming outer bushing into the bone hole and draw the manual draw open steel wires to deepen inward until clamping the intramedullary nail to make it unavailable of swinging horizontally; then place the aiming rod inside the aiming outer bushing and lock the outer bushing and the aiming rod at the locking bayonet. With the structure as above, the aiming rod, with the help of the outer bushing, easily enters into the screw thread hole of the intramedullary nail with its front end, thus interlinked with each other firmly without deformation and dislocation.

Description

Intramedullary nail with lock far-end sighting device

Technical field: this utility model relates to a kind of sighting device of bone surgery punching usefulness.

Background technology: at orthopaedics clinically, existing intramedullary pin sighting system exists the defective of distortion, dislocation, influences surgical effect.

Technology contents: the purpose of this utility model is exactly the distortion that exists at existing intramedullary pin sighting system, the problem of dislocation, and design a kind of aims at accurately, stablizes firm sighting device.

The purpose of this utility model is to realize like this, this sighting device comprises intramedullary nail with lock, the aiming trocar sheath, parts such as sighting bar, described intramedullary nail with lock end is provided with a screwed hole, described aiming trocar sheath is a tubular, the upper end is trocar sheath locking bayonet socket, the centre is provided with one and connects outer sight lock hole, the lower end is circular arc and a side has an active opening clamp, the opening clamp and and hand traction opening steel wire link, described sighting bar upper end is one to lock bayonet socket, the lower end is provided with screw thread, after the bone hole is accomplished fluently, to aim at trocar sheath and insert the bone hole, pulling hand traction opening steel wire, inwardly deeply, until blocking intramedullary pin, make it can not teeter, sighting bar is put into the aiming trocar sheath, and trocar sheath and sighting bar are pinned at locking bayonet socket place with the locking card.

Owing to adopt said structure, telescopic outside auxiliary its front end down of sighting bar enters in the screwed hole of intramedullary pin easily, and firm joins together, not yielding dislocation.

Marginal data: describe embodiment of the present utility model in detail below in conjunction with accompanying drawing

Fig. 1 intramedullary nail with lock sketch map

Fig. 2 aims at the trocar sheath front elevation

Fig. 3 aims at the trocar sheath side view

Fig. 4 sighting bar sketch map

Fig. 5 sighting device is used cutaway view

The vertical internal fixation sketch map of Fig. 6 femur

Among the figure: 1, intramedullary pin 2, intramedullary pin screwed hole 3, aiming trocar sheath 4, trocar sheath locking bayonet socket 5, the outer sight lock hole 6 of connection, opening clamp 7, hand traction opening steel wire 8, sighting bar 9, sighting bar locking bayonet socket 10, sighting bar screw thread 11, locking card 12, external sighting system 13, femur

Embodiment: the screwed hole 2 that intramedullary pin 1 and end thereof have been shown among Fig. 1.

The trocar sheath locking bayonet socket 4 of aiming trocar sheath 3 and upper end, the outer sight lock hole 5 of intermediary connection have been shown among Fig. 2, the lower end is circular arc and a side has an active opening clamp 6, opening clamp 6 and and hand traction opening steel wire 7 link.

The side view of aiming trocar sheath has been shown, i.e. trocar sheath locking bayonet socket 4, hand traction opening steel wire 7 among Fig. 3.

Sighting bar locking bayonet socket 9, the sighting bar screw thread 10 of sighting bar 8 and upper end have been shown among Fig. 4.

User mode has been shown among Fig. 5, be after the bone hole is accomplished fluently, insert the bone hole with aiming trocar sheath 3, pulling hand traction opening steel wire 7, inwardly deeply, until blocking intramedullary pin 1, make it can not teeter, sighting bar 8 is put into aiming trocar sheath 3, and assisting at trocar sheath 3 down along intramedullary pin 1 longitudinal sliding motion, enter screwed hole 2 internal fixation of intramedullary pin until the front end screw thread that makes sighting bar 8, trocar sheath 3 and sighting bar 8 be stuck at its locking bayonet socket 4,9 places with locking card 11, and and external sight system 12 be associated in together.

Femur 13 vertical internal fixation states have been shown among Fig. 6.

Claims

1, a kind of intramedullary nail with lock far-end sighting device, this sighting device comprises parts such as intramedullary nail with lock, aiming trocar sheath, sighting bar, it is characterized in that described intramedullary nail with lock end is provided with a screwed hole, described aiming trocar sheath is a tubular, the upper end is trocar sheath locking bayonet socket, the centre is provided with one and connects outer sight lock hole, the lower end is circular arc and a side has an active opening clamp, the opening clamp and and hand traction opening steel wire link, described sighting bar upper end is a locking bayonet socket, and the lower end is provided with screw thread.