Hollow nail

Abstract

The invention provides a hollow nail pertaining to the field of medical equipment for the department of orthopaedics. The hollow nail comprises a nail body with a hollow structure. The head portion of the nail body is symmetrically provided with two U-shaped grooves. Openings of the U-shaped grooves are located at the head portion of the nail body. The interior of the nail body is provided with a hollow rod, the top end of which is provided with a positioning block. The positioning block is in threaded connection with the tail of the nail body. The bottom end of the hollow rod is connected with an arc elastic sheet which protrudes upwardly. Two ends of the arc elastic sheet are fixed into an inner wall of the head portion of the nail body. The hollow nail has following beneficial effects: the hollow nail is simple in structure and reasonable in design; after the nail body is screwed into a fracture part and internally provided with the arc elastic sheet, deformation of the arc elastic sheet is produced under effect of the hollow rod; the downwardly-pressed arc elastic sheet enables the head portion of the nail body to expand outwardly for deformation so that looseness of the nail body is reduced or even occurrence rate of separation is decreased; and stability and reliability of cancellous bone fracture fixation are effectively enhanced.

Description

technical field [0001] The invention relates to the field of orthopedic medical devices, in particular to a hollow nail. Background technique [0002] With the aging population in my country, the incidence of femoral neck fractures in the elderly continues to increase. Due to osteoporosis and local ischemia of the femoral neck in the elderly, nonunion and femoral head necrosis are prone to occur, so this fracture has become an important topic in geriatric medicine. With the improvement of surgical conditions and the accumulation of surgical skills, emergency double-headed pressurized cannulated nail internal fixation under C-arm fluoroscopy has become the first choice of grass-roots hospitals and patients for its advantages of short operation time, small trauma, short hospital stay, and low cost. preferred. Existing hollow screws are threaded at one end or both ends. However, due to the insufficient lifting and fixing strength of the hollow screws commonly used in clinical pr...

AI Technical Summary

Problems solved by technology

The existing hollow screws are threaded at one end, or both ends are threaded. However, due to the insufficient lifting and fixing strength of the hollow screws commonly used in clinical practice, it often leads to postoperative fracture displacement, screw loosening, and final fixation failure.

Especially for the common clinical femoral neck fractures in the elderly, because most patients have osteoporosis, it is difficult for ordinary hollow nails to achieve the purpose of anti-rotation and anti-sliding, so the internal fixation hollow nails often loosen and fall out.

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