Bilateral Femoral Neuropathy: A Rare Complication of Drug Overdose due to Prolonged Posturing in Lithotomy Position

Table 1

Neurophysiological findings.

Sensory nerve conduction studies
Nerve and site	Onset latency	Peak latency	Amplitude	Segment	Latency difference	Distance	Conduction velocity
Peroneal R
Ankle	2.0 ms	2.6 ms	15 µV	Dorsum of foot-ankle	2.0 ms	100 mm	49 m/s
Peroneal L
Ankle	2.1 ms	2.9 ms	12 µV	Dorsum of foot-ankle	2.1 ms	95 mm	45 m/s
Sural R
Lower leg	1.7 ms	2.6 ms	12 µV	Ankle-lower leg	1.7 ms	95 mm	55 m/s
Sural L
Lower leg	1.7 ms	2.6 ms	12 µV	Ankle-lower leg	1.7 ms	95 mm	55 m/s
Saphenous R
	No recording			Lower leg-ankle
Saphenous L
	No recording			Lower leg-ankle
Motor nerve conduction studies
Nerve and site	Latency	Amplitude	Segment	Latency difference	Distance	Conduction velocity	F-latency
Peroneal R
Ankle	5.9 ms	2.7 mV	Extensor digitorum brevis-ankle	5.9 ms	mm	m/s
Fibula (head)	13.0 ms	1.9 mV	Ankle-fibula (head)	7.1 ms	320 mm	45 m/s
Tibial R
Ankle	4.1 ms	20.0 mV	Abductor hallucis-ankle	4.1 ms	mm	m/s	53.9 msec
Tibial L
Ankle	3.9 ms	20.7 mV	Abductor hallucis-ankle	3.9 ms	mm	m/s	53.3 msec
Electromyography
	Spontaneous activity		MUAPs			Activation	Recruitment
	Fibrillations	PSWs	Amplitude	Duration	Phases
Right vastus lateralis	+3	+3	No MUAPs could be recruited
Right vastus medialis	+3	+3	No MUAPs could be recruited
Left vastus lateralis	+3	+3	No MUAPs could be recruited
Left vastus medialis	+3	+3	No MUAPs could be recruited
Right iliopsoas	0	0	N	N	N	N	N
Left iliopsoas	0	0	N	N	N	N	N
Right adductor longus	0	0	N	N	N	N	N
Left adductor longus	0	0	N	N	N	N	N

PSWs, positive sharp waves; MUAPs, motor unit action potentials; N, normal.