intramedullary nail extractor

Abstract

The invention relates to the medical field and discloses an intramedullary nail extractor. In the present invention, the intramedullary nail extractor is composed of an inner core and a nail puller, wherein the inner core is hollow cylindrical and can expand after being pressed, the diameter of the inner core is smaller than the inner wall diameter of the intramedullary nail, and the nail puller It is cylindrical and its diameter is smaller than that of the inner core. Since the inner core can expand under pressure, as the nail puller is screwed in from the hollow part of the inner core, the inner core will expand and embed into the tail thread of the intramedullary nail, so that the intramedullary nail can be easily removed. Because there is no need for the nail remover to match the thread of the tail of the intramedullary nail, the angle limit is significantly reduced, effectively avoiding the expansion of surgical trauma, and the intramedullary nail can be removed smoothly regardless of whether the intramedullary nail spins.

Description

technical field [0001] The invention relates to the medical field, in particular to the intramedullary nail removal technique in the medical field. Background technique [0002] With the continuous development of intramedullary nailing technology, this technology has been widely used in the medical field. The so-called intramedullary fixation refers to a method in which an implant with good compatibility with the human body and a certain strength is built in the medullary cavity at the distal or proximal end of the bone to achieve fixation of the fracture end. [0003] Intramedullary fixation has been used in fracture internal fixation for many years. Intramedullary fixation can be applied not only to straight bone fractures, but also to slightly curved bone fractures to achieve the purpose of three-point fixation, and it can perform early functional exercises, showing strong vitality in clinical applications. [0004] After the intramedullary nail fixation operation, it i...

AI Technical Summary

Problems solved by technology

[0005] However, the inventors of the present invention found that in the actual operation, due to the limitation of the surgical incision and the surgical position, it is often difficult to place the nail puller in the direction to make the threads bite accurately, and the nail cannot be pulled out smoothly.

Moreover, the staple remover is relatively thick, and it needs enough exposure to be inserted.

If the intramedullary nail is inserted too deeply or the bone callus grows in, it will be difficult to occlude the tail thread of the intramedullary nail, and the trauma needs to be enlarged

If the intramedullary nail is thinner than the medullary cavity, the intramedullary nail spins when the threads occlude, making it difficult to pull out the intramedullary nail due to loose bite

Clinically, due to the above reasons, the nail removal time is as long as several hours, which also has a great impact on the postoperative recovery of patients.

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