Vloka et al. Anesth Analg 2001; 92:215-7

Reviewed by: R. Prasad, MD

Summary:

• Dissected lower extremeties of 15 cadavers (28 legs; 2 unusable).
• Measured point of SN split (into Tibial N, Common Peroneal N) above popliteal crease.
• Distance HIGHLY variable; 60.5 +/- 27 mm, with range from 0-115 mm.
• Only 2 legs had SN division > 100mm above crease

Recommendations:

• For single-injection technique of popliteal nerve block, insert needle 100mm above popliteal crease
• Findings less important for double-injection technique, where look for TN and CPN stimulation individually.