Arthroscopic Debridement of the Posterior Compartment of the Knee after Total Knee Arthroplasty

Figure 5

This schema demonstrates the method to create a posterior transseptal portal. A sheath inserted from the posterolateral portal is pushed to the septum to protect popliteal vessels that lie immediately behind the lateral posterior capsule. Viewing the septum through the posteromedial portal, it is perforated first by using a 1.5 mm Kirschner wire followed by a 3.0 mm Kirschner wire through the sheath from the posterolateral portal (arrow). PM portal, posteromedial portal; PL portal, posterolateral portal; PAV, popliteal artery and vein; MCF, medial condyle of the femoral component; LCF, lateral condyle of the femoral component.