Positioner and positioning method for arthroscopic treatment of posterior cruciate ligament

Abstract

The invention discloses a positioning device for cruciate ligaments after arthroscopic treatment. The positioning device comprises an upper positioning rack and a lower positioning rack. One end of the upper positioning rack is provided with a cross head longitudinal baffle. A cross retainer is arranged on one side of the cross head longitudinal baffle. The other end of the upper positioning rack is connected with one end of the lower positioning rack through a screw. A hollow tube is connected to the other end of the lower positioning rack. A hollow guide tube penetrates the hollow tube. An arc beam is connected to the lower positioning rack through another screw. The arc beam is provided with a graduated sheet. Two Kirschner wire holes are formed on two sides of the graduated sheet. Two ends of the arc beam are provided with two split-head screws respectively. A Kirschner wire is fixed on the arc beam through the two split-head screws. The invention further discloses a positioning method of the positioning device. The positioning device is simple to operate and capable of accurately positioning, and bone tunnels drilled with the positioning device meet anatomical location.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a positioner for treating the posterior cruciate ligament under arthroscopy, and also relates to a positioning method of the positioner. Background technique [0002] Posterior cruciate ligament rupture is a very common knee sports injury. The posterior cruciate ligament (PCL) starts from the posterior part of the lateral medial condyle of the femur, descends behind the articular surface of the medial and medial condyle of the tibia, and extends to the posterior side of the upper end of the tibia. About 1.0cm below the tibial plateau, it is an irregular circular shape, surrounded by a layer of synovium, with an average length of 3.8cm and a diameter of 1.2cm. The area of ​​the intersection part gradually decreases from the proximal end to the distal attachment point. The posterior cruciate ligament has the physiological function of limiting tibial posterior tr...

AI Technical Summary

Problems solved by technology

At present, there are mainly two kinds of locators in the world: the first one is the locator produced by Smith & Nephew Company in the United States, which has the advantages of convenience and quickness, but during the operation, an additional incision must be made from the posteromedial side of the knee joint. It can only be done under the supervision of arthroscopy, which is time-consuming and has the possibility of damaging the posterior blood vessels and nerves; the second is the locator of the French LARS ligament, which does not require a posteromedial approach, but it still needs the support of surgical assistants. The mobility is also high. This method is difficult to drill the bone tunnel of the tibia accurately in terms of depth and left and right, and there is only a 7.5mm drill bit, which will easily lead to the failure of the reconstruction of the posterior cruciate ligament.

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