Peripheral nerve stimulation (PNS) is the excitation of motor nerves to invoke involuntary muscle contraction and has applications in regional anesthesia for dosage control. In this study, a wearable ultrasonic sensor is used to measure the muscle activity while minimizing motion artifact and allowing freedom of tissue movement beneath the sensor. Muscle activity from PNS is evaluated based on muscle displacement and peak displacement velocity. The ultrasound method proposed in this study is shown to be sensitive enough to detect muscle motion which is not visually or externally observable. As the PNS current increases the muscle displacement reaches a maximum; however displacement velocity still increases slightly beyond this point.

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Keywords muscle monitoring, peripheral nerve stimulation, regional anesthesia, tissue displacement measurement, wearable and flexible ultrasonic sensor
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Conference 2014 IEEE International Ultrasonics Symposium, IUS 2014
Huang, A. (Andy), Ono, Y, & Liu, K. (Kyle). (2014). Ultrasonic monitoring of skeletal muscle response to electrical stimulation of peripheral nerve. Presented at the 2014 IEEE International Ultrasonics Symposium, IUS 2014. doi:10.1109/ULTSYM.2014.0258