Adjustable three-dimensional guider for transdermal bone joint screw placement

Abstract

The invention discloses an adjustable three-dimensional guider for transdermal bone joint screw placement, which comprises a first arc-shaped rack and a second arc-shaped rack and a first linear rack and a second linear rack, wherein the first arc-shaped rack and the second linear rack are located in the same plane; the second arc-shaped rack and the first linear rack are connected and vertical with each other and located in the same plane; the first and second arc-shaped racks have the same radius of curvature and superposed centres of curvature; a first connector is arranged between the first arc-shaped rack and the second arc-shaped rack and is rotatably connected with the first and second arc-shaped racks; the first and second arc-shaped racks are engaged with the first and second gears on the first connector respectively; a second connector is arranged between the first linear rack and the second linear rack and is slidingly connected with the first and second linear racks; the first and second linear racks are engaged with the third and fourth gears on the second connector respectively; the first arc-shaped rack is connected with a guide sleeve, the central axis of the guidesleeve passes through a point O; the second linear rack is connected with a positioning sleeve, the central axis of the second linear rack is vertical with the central axis of the positioning sleeve mutually; and the guide sleeve and the positioning sleeve share the same plane with the first arc-shaped rack and the second linear rack.

Description

technical field [0001] The invention relates to a surgical instrument, which relates to an orthopedic surgical instrument, in particular to an adjustable three-dimensional guider for placing nails in percutaneous bone joints. Background technique [0002] The application of Kirschner wire fixation, or the application of Kirschner guide screws, is very common in orthopedic surgery. There are various types of guides used in open surgery to guide Kirschner wires, and the accuracy is high; while the guides used in closed percutaneous bone puncture needles have also been reported, but the accuracy is not high, and they have not been widely promoted. In today's era of rapid development of surgical technology, percutaneous minimally invasive surgery has been widely recognized and vigorously promoted. Percutaneous screw fixation refers to skin incision of about 5-10mm, under the protection of the sleeve, puncture reaches the bone surface, drills into the bone circular needle, or in...

AI Technical Summary

Problems solved by technology

At present, most of the clinical operations are open reduction and internal fixation, which requires incision of the muscle fascia tissue to expose the drill hole position; in order to accurately and successfully place the screw during the operation, it is often necessary to repeatedly drill the hole and see through it to reach a suitable position. Too many drilling holes destroy the blood supply in the femoral neck and cause bone loss, which reduces the firmness of fracture fixation and is also one of the iatrogenic factors that cause fracture nonunion and femoral head necrosis; excessive X-ray irradiation , causing harm to both patients and doctors

To achieve one-time accurate nail placement, it can only be achieved through computer navigation assistance. Only a few hospitals in China are equipped with it, and it cannot be popularized.

To quickly and accurately place the nails, it is difficult to open the nails, but it is even more difficult to close the nails

At present, there are many simple closure guides at home and abroad, and the clinical effect is not good.

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