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Standard portal sites (right knee). The medial (MED) and lateral (LAT) infrapatellar portal sites are identified approximately 1 cm above the tibial joint line and 1 cm medial or lateral to the border of the patellar tendon. The superolateral (SL) portal site is identified at the level of the superior aspect of the patella and 1 cm lateral to the lateral border of the patella. These sites are sterilized and anesthetized prior to needle arthroscope insertion.
