Clinical Study

The Anatomic Relationship of the Tibial Nerve to the Common Peroneal Nerve in the Popliteal Fossa: Implications for Selective Tibial Nerve Block in Total Knee Arthroplasty

Figure 2

Ultrasound image of the common peroneal nerve and tibial nerve at the popliteal crease after selective tibial nerve block. Local anesthetic was observed around the tibial nerve but not the common peroneal nerve. (a) Local anesthetic could be traced proximally toward the bifurcation which was observed to encircle the sciatic nerve proximal to the bifurcation, (b) CPN = common peroneal nerve; TN = tibial nerve; LA = local anesthetic; SN = sciatic nerve; PA = popliteal artery.
(a)
(b)