In Vivo Arthroscopic Behavior of the Infrapatellar Plica of the Knee

Local anesthesia using bupivicaine will be initiated. The IPP, if present will be injected with contrast material. In order to minimize discomfort, lidocaine 1%, in as small a volume as possible, will be injected into the fat pad under direct vision to avoid any intra-articular damage from the #25 needle. Radiographic visualization will be verified and the knee taken through a full range of passive and active exercises. Active quadriceps contraction in the subject will be performed at 0, 15, 30 60 and 90 degrees of flexion. In so far as is technically possible, the behavior of the IPP will be videotaped and recorded on lateral fluoroscopy.