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Creation of central midline portal in a right knee. (A) External view showing needle placement 8 to 10 mm below the inferior pole of the patella. (B) Arthroscopic view showing needle localization of the optimum portal location. (C) The portal is created with a surgical knife in the same location and with the same orientation as the optimally positioned needle. (D) The intra-articular emergence of the surgical blade through the fat pad is checked to avoid iatrogenic injury.
