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Pain Research and Management
Volume 2017 (2017), Article ID 7250181, 6 pages
https://doi.org/10.1155/2017/7250181
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

1Department of Anesthesiology, Albany Medical Center, Albany, NY, USA
2Department of Anesthesiology, Montefiore Medical Center, Bronx, NY, USA
3Albert Einstein Medical College, Bronx, NY, USA

Correspondence should be addressed to Boleslav Kosharskyy; gro.eroifetnom@srahsokb

Received 25 August 2016; Accepted 12 December 2016; Published 2 February 2017

Academic Editor: Can Eyigör

Copyright © 2017 Eric R. Silverman et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Background. A recently described selective tibial nerve block at the popliteal crease presents a viable alternative to sciatic nerve block for patients undergoing total knee arthroplasty. In this two-part investigation, we describe the effects of a tibial nerve block at the popliteal crease. Methods. In embalmed cadavers, after the ultrasound-guided dye injection the dissection revealed proximal spread of dye within the paraneural sheath. Consequentially, in the clinical study twenty patients scheduled for total knee arthroplasty received the ultrasound-guided selective tibial nerve block at the popliteal crease, which also resulted in proximal spread of local anesthetic. A sensorimotor exam was performed to monitor the effect on the peroneal nerve. Results. In the cadaver study, dye was observed to spread proximal in the paraneural sheath to reach the sciatic nerve. In the clinical observational study, local anesthetic was observed to spread a mean of (SD) cm proximal to popliteal crease. A negative correlation was found between the excess spread of local anesthetic and bifurcation distance. Conclusions. There is significant proximal spread of local anesthetic following tibial nerve block at the popliteal crease with possibility of the undesirable motor blocks of the peroneal nerve.