Introduction

Anatomic landmarks alone may not always be sufficient to accurately guide electromyography (EMG) electrode needle placement.

Methods

Senior residents and fellows (n = 11) targeted 4 forearm muscles with anatomic landmarks alone versus with audiovisual EMG feedback. Accuracy of EMG needle placement was verified using neuromuscular ultrasound imaging.

Results

While relatively large and superficial FCR muscle was sampled at a rate of 100% with and without audiovisual EMG feedback, accuracy of deeper and/or smaller forearm muscles (FPL, EIP, and SUP) diminished significantly without audiovisual EMG feedback.

Discussion

Our study suggests that in clinical scenarios in which an electrodiagnostician relies on anatomic landmarks alone to target small and deep muscles, the risk of misplacement of needle electrode is increased. Consideration for neuromuscular ultrasound to augment training and/or real time guidance in EMG practice may be appropriate.

中文翻译：

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使用神经肌肉超声验证，学员在选定的前臂肌肉中放置针电极的准确性

介绍

单独的解剖标志可能并不总是足以准确指导肌电图 (EMG) 电极针的放置。

方法

老年住院医师和研究员 (n = 11) 仅使用解剖标志与视听 EMG 反馈来针对 4 块前臂肌肉。使用神经肌肉超声成像验证 EMG 针放置的准确性。

结果

虽然在有和没有视听 EMG 反馈的情况下以 100% 的比率对相对较大和浅表的 FCR 肌肉进行采样，但在没有视听 EMG 反馈的情况下，更深和/或更小的前臂肌肉（FPL、EIP 和 SUP）的准确性显着降低。

讨论

我们的研究表明，在临床情况下，电诊断师仅依靠解剖标志来针对小而深的肌肉，针电极错位的风险会增加。考虑使用神经肌肉超声来增强 EMG 实践中的训练和/或实时指导可能是合适的。