Tibial intramedullary nail distal positioning rod

Abstract

The invention discloses a far-end positioning rod for a tibia intramedullary nail. The positioning rod is used for operating the tibia intramedullary nail. The positioning rod comprises a first sleeve, a second sleeve and a bulging part, wherein the first sleeve comprises an acting end and a leading-out terminal; the second sleeve is movably nested on the outside of the first sleeve and can extend out of the acting end to prop against the tibia intramedullary nail, the bulging part extrudes and is connected to the acting end of the first sleeve, communicated through long holes are formed in the bulging part and the first sleeve, the outer circumferential surface of the bulging part is matched with inserting holes in the tibia intramedullary nail, open slots communicated with the through long holes are formed in the outer circumferential surface of the bulging part, and an elastic expanding and butting part is arranged at one end, far away from the first sleeve, of the bulging part and can elastically expand under the action of insertion parts in the through long holes to prop against the tibia intramedullary nail. The second sleeve and the elastic expanding and butting part of the bulging part are matched and jointly clamp and fix the tibia intramedullary nail, so that the tibia intramedullary nail cannot move relative to the positioning rod during operation of the positioning rod, and therefore, the tibia intramedullary nail can be conveniently and accurately operated through the positioning rod.

Description

technical field [0001] The invention relates to the technical field of intramedullary fixation of traumatic fractures, in particular to a positioning rod at the distal end of an intramedullary nail used for operating the intramedullary nail during an operation. Background technique [0002] Intramedullary nailing is the gold standard for the treatment of diaphyseal fractures. At present, in the clinical practice, when the distal end of the intramedullary nail is locked, the relative position is positioned through the aiming frame fixedly connected with the intramedullary nail, and then the positioning surface of the distal end of the intramedullary nail is aimed at with the pressing rod used in conjunction with the aiming frame And carry out the positioning by pressing down. After the pressing down positioning is completed, lock the relative position of the pressing rod and the aiming frame, and then drive a screw into the locking hole at the far end through the aiming mecha...

AI Technical Summary

Problems solved by technology

First of all, for tibial fractures and other operations that are difficult to reset, the intramedullary nail is prone to stress and deformation during insertion. In this case, using the above-mentioned compression rod for positioning can easily lead to inaccurate compression. And even if the pressure is not accurate, it cannot be corrected in time during the operation, and often only blind locking can be performed.

[0004] In addition, since the front end of the above-mentioned pressing rod only interferes with the outer wall of the distal end of the intramedullary nail, even if it is pressed on, you must always be careful in subsequent operations, because the positioning rod is easy to slip off the intramedullary nail. resulting in positioning failure

[0005] Furthermore, during the operation, the doctor can only judge whether the pressure rod is pressed against the distal end of the intramedullary nail by feeling or listening to the sound, but the sound and feeling often appear false, so that the position of the distal end of the intramedullary nail cannot be correctly determined

[0006] Finally, the more important thing is that the pressure rod in the above-mentioned prior art can only perform the depressing operation on the distal end of the intramedullary nail, but cannot perform adjustments in other directions, which makes it impossible to adjust through the aiming frame and the pressure rod during the operation. The position of the intramedullary nail in other directions

If adjustment is required, fluoroscopy can only be performed through the C-arm, so that the doctor will be exposed to additional radiation, which will cause unnecessary damage to health

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