Intramedullary nail extractor

Abstract

The invention relates to the field of medical apparatus and instruments and discloses an intramedullary nail extractor. According to the intramedullary nail extractor disclosed by the invention, after an expansion head is put at the tail part of an intramedullary nail, an expansion rod is inserted into a hollow rod of a nail puller from a handle end; the tail part of the expansion rod is knocked and propelled to enable the expansion rod to be inserted into the expansion head; as the expansion head can be expanded after being pressed, one end of the expansion head is inlaid into threads at the tail part of the intramedullary nail by one end of the expansion head during a process of knocking and insertion; the expansion rod, the expansion head and the tail part of the intramedullary nail are firmly fitted, so that the intramedullary nail can be easily extracted. When the nail is extracted by using the intramedullary nail extractor, the intramedullary nail extractor does not need to be accurately aligned with the intramedullary nail in position when being put, therefore, the angular restriction is further reduced; the operation is simpler; and moreover, the exposure time of the surface of a wound and the operation time can be effectively shortened, and the intraoperative hemorrhage can be effectively reduced.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to the intramedullary nail removal technique in the medical field. Background technique [0002] With the continuous development of intramedullary nail internal fixation 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 nai...

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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