**4.3 Bursectomy**

Among numbers of bursae existed around the knee, the most problematic bursitis would happen in the prepatellar bursa. The incision should be at the superior and the inferior end of the bursa, with care not to cut the infrapatellar branch of the saphenous nerve. Authors prefer using dye solution prior to resection to help determine the extent of the bursal tissue, as it does not always look like typical bursa. Under dry arthroscopy in the bursa created by the lifter, bursectomy can be performed using a shavor or an electric coagulator. Putting a drainage tube should also be considered depending on the cases.

surface of the cartilage looked almost intact on dissociated sites. We determined the range to release from the shape of the patella from inside the joint, using pierce-marks of 23-G needles for marking. The subcutaneous space was then widely developed. A semi-circular hanger was then applied through the SL access portal by placing the ring-shaped end of the hanger, with the other end of the hanger retracted by hand. Watching the patella and lateral retinaculum from outside the joint, lateral release was able to be performed. The width of

Fig. 9. Arthroscopic view from inside and outside the joint. A, C) Right knee. B, D) Left knee. A) View from inside the right knee joint, using the AL portal. Black arrow indicates the bipartite patella. No marked cartilage damage was evident. B) View from inside the left knee joint, using the AL portal. C) View from outside the right knee joint, using the SL portal. Lateral release of bipartite patella is successfully completed. The lateral femoral condyle can be seen from outside the joint. D) Lateral release performed under a view from outside the joint. A shaver is introduced from the SL portal. The camera is from the AL portal. The lifting hanger is also seen (white arrow). P, patella. \*Bipartite patellae.

release could be checked from both inside and outside the joint (Fig.9).
