Fixing device in patella

Abstract

A fixing device in patella is characterized by comprising a fixing nail, a pair of gaskets (2) with central holes, and a nut (7), the fixing nail sequentially comprises a nail handle section (8), a boss section (10), a fixing section (3), a threaded section (12), a nail front part (11) and a nail tip (6), the nut (7) is matched with the threaded section (12), the fixing section (3) is sleeved with the gaskets (2), and after patella (5) is fixed, one gasket (2) is tightly attached to the boss section (10), and the other gasket (2) is tightly attached to the nut (7). The gaskets (2) are in a crescent shape, and the crescents of the two gaskets (2) are oppositely arranged. A front breaking groove (13) is formed between the threaded section (12) and the nail front part (11). A rear breaking groove (9) is formed between the nail handle section (8) and the boss section (10). The fixing device can press and fix fractures without influencing repairing of aponeurosis before patella, and is simple in structure, easy to operate and reliable in connection.

Description

technical field [0001] The invention belongs to the field of medical equipment, and relates to open reduction and internal fixation of patellar fractures in orthopedics, which can achieve pressurized internal fixation of fractures without covering the prepatellar fascia, and is beneficial to the repair of the prepatellar fascia. An internal fixation device that ultimately promotes fracture healing. Background technique [0002] In the open reduction and internal fixation of patella fractures, there are many ways to fix the fracture, but the available internal fixation devices are very limited, and these internal fixation devices have many defects, which often lead to internal fixation failure or internal fixation. Fractures bring pain to patients and increase the risk of medical disputes. The advantages and disadvantages of the current common internal fixation methods and internal fixation devices are briefly described as follows: [0003] 1. The steel wire tension band is...

AI Technical Summary

Problems solved by technology

However, there are at least three problems in this method: (1) The exposed steel needle needs to be cut according to the longitudinal diameter of the patella and buried under the skin. Because the remaining length is not easy to control, it often occurs when the patient bends the knee because the needle tail is too long. If it is too short, it will easily cause the steel wire to slip off from the tail of the needle, resulting in failure of fixation; (2) When the steel wire presses hard on the surface of the patella, it will cause the lower pole of the patella to crack, especially the transverse fracture of the patella below the fracture line is easier If it occurs, it not only causes fixation failure but also aggravates the damage. At the same time, the steel wire often has fatigue fracture at the knot; (3) the surface of the patella is blocked by the ring or 8-shaped steel wire, which is not conducive to the suture repair of the prepatellar aponeurosis. Defects that affect the healing of the patella

However, its structure is too complex and difficult to operate, and the connection between several split nails may fail

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