Intramedullary cavity reaming device matched with intramedullary nail dissection

Abstract

The invention relates to an intramedullary cavity reaming device matched with intramedullary nail anatomy. The device is characterized by comprising a rigid reaming rod, reaming protrusions arranged in a criss-cross mode are arranged on the peripheral wall of the rigid reaming rod, and the rigid reaming rod comprises a far end section, a near end section and a handling section which are integrated or fixedly connected with one another; the whole far-end section is in an arc shape. According to the intramedullary nail, sclerotin can be filed to shape and ream the medullary cavity, an insertion channel matched with the anatomical shape of the intramedullary nail is established, and the extrusion force and deformation of the wall of the medullary cavity in the insertion process of the intramedullary nail are reduced, so that the far-end aiming device can keep the same accuracy as in vitro after being inserted into the medullary cavity during subsequent intramedullary nail implantation; The positioning accuracy is improved.

Description

technical field [0001] The invention relates to a reaming device, in particular to a reaming device suitable for femoral and tibial medullary cavities in orthopedic surgery, and belongs to the technical field of medical instruments. Background technique [0002] Modern tibial intramedullary nailing is widely used in orthopedics, and has the advantages of simple operation, stable structure, and less trauma. In the traditional intramedullary nailing operation, the positioning and aiming of the distal hole of the intramedullary nail has always had the problem of low accuracy. The pressure will cause deformation, which will cause deviation from the external aiming device, resulting in inaccurate positioning, which will affect the efficiency and effect of the operation. In order to overcome the occurrence of the above phenomenon, the doctor will pre-establish a channel to facilitate the insertion of the intramedullary nail, specifically through a soft rod, and a drill bit of sui...

AI Technical Summary

Problems solved by technology

In the traditional intramedullary nailing operation, the positioning and aiming of the distal hole of the intramedullary nail has always had the problem of low accuracy. The pressure will cause deformation, which will cause deviation from the external aiming device, resulting in inaccurate positioning, which will affect the efficiency and effect of the operation

In order to overcome the occurrence of the above phenomenon, the doctor will pre-establish a channel to facilitate the insertion of the intramedullary nail, specifically through a soft rod, and a drill bit of suitable specifications is installed on the head, and the medullary cavity is reamed by using the drill bit. However, the disadvantage of this method is that the channel established by the soft rod inserted into the medullary cavity is an arc-shaped channel, which makes it difficult to insert the intramedullary nail into the medullary cavity, and the resistance is relatively large during the insertion process, resulting in deformation of the intramedullary nail. Unable to achieve precise positioning and aiming at the far end

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