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KMID : 1140920180420020321
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Annals of Rehabilitation Medicine
2018 Volume.42 No. 2 p.321 ~ p.328
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Reference Value for Infrapatellar Branch ofSaphenous Nerve Conduction Study:Cadaveric and Clinical Study
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Kim Keon-Tae
Kim Yong-Ki
Yoon Jung-Ro
Ko Yun-Dam
Chung Myung-Eun
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Abstract
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Objective: To determine the optimal stimulation and recording site for infrapatellar branch of saphenous nerve(IPBSN) conduction studies by a cadaveric study, and to confirm that obtained location is practically applicable tohealthy adults.
Methods: Twelve lower limbs from six cadavers were studied. We defined the optimal stimulation site as the pointIPBSN exits the sartorius muscle and the distance or ratio were measured on the X- and Y-axis based on the lineconnecting the medial and lateral poles of the patella. We defined the optimal recording site as the point where theterminal branch met the line connecting inferior pole of patella and tibial tuberosity, and measured the distancefrom the inferior pole. Also, nerve conduction studies were performed with obtained location in healthy adults.
Results: In optimal stimulation site, the mean value of X-coordinate was 55.50±6.10 mm, and the ratio of theY-coordinate to the thigh length was 25.53%±5.40%. The optimal recording site was located 15.92±1.83 mm belowthe inferior pole of patella. In our sensory nerve conduction studies through this location, mean peak latency was4.11±0.30 ms and mean amplitude was 4.16±1.49 mV.
Conclusion: The optimal stimulation site was located 5.0?6.0 cm medial to medial pole of the patella and 25%of thigh length proximal to the X-axis. The optimal recording site was located 1.5?2.0 cm below inferior pole ofpatella. We have also confirmed that this location is clinically applicable.
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KEYWORD
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Electromyography, Knee injuries, Cadaver
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