Objective: To summarize the anatomic features of the posterior septum of the knee joint and its application in posterior trans-septal portal for arthroscopic surgery.
Methods: The literature related to posterior septum of the knee joint and arthroscopic surgery was extensively reviewed and analyzed.
Results: The posterior septum of the knee joint has more mechanoreceptors and blood vessels in the upper part, which are close to arteria popliteal at the tibial plateau level; the posterior compartment is divided into wider posteromedial and narrower posterolateral compartments. A safe arthroscopic trans-septal portal is established, in the knee flexion of 90 degrees, in a lateral-to-medial direction, and with an inserting location below the middle of posterior septum.
Conclusion: The establishment method of posterior trans-septal portal is not uniform and all the features of posterior septum should be considered to decrease the complications.