British Journal of Anaesthesia, Vol 78, Issue 3 314-316, Copyright © 1997 by The Board of Management and Trustees of the British Journal of Anaesthesia
D. J. Rosario, S. Jacob, J. Luntley, P. P. Skinner and A. T. Raftery
Femoral nerve palsy has been reported after percutaneous ilioinguinal field
infiltration with general anaesthesia for inguinal herniorrhaphy. The
mechanism whereby this could occur was studied in cadaver dissections. It
was found that the plane between the transversus abdominis muscle and the
transversalis fascia was continuous laterally with the tissue plane deep to
the iliacus fascia, which is the plane containing the femoral nerve.
Injection of methylene blue 1 ml into this plane resulted in pooling of dye
around the femoral nerve. Femoral nerve palsy may result from infiltration
of a sufficient volume of local anaesthetic into the plane between the
transversus abdominis muscle and the transversalis fascia with tracking of
the injectate deep to the iliacus fascia to affect the femoral nerve. This
finding has important implications for the performance of a percutaneous
ilioinguinal field block particularly in day surgery provision.
SHORT COMMUNICATIONS
Mechanism of femoral nerve palsy complicating percutaneous ilioinguinal field block
Department of Urology, University of Sheffield, Sheffield; Department of Biomedical Sciences, University of Sheffield, Sheffield; Department of Anaesthesia, Northern General Hospital, Sheffield; Department of Surgery, Northern General Hospital, Sheffield
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