alexa Optimal depth of NIM EMG endotracheal tube for intraoperative neuromonitoring of the recurrent laryngeal nerve during thyroidectomy.
Medicine

Medicine

Journal of General Practice

Author(s): Lu IC, Chu KS, Tsai CJ, Wu CW, Kuo WR, , Lu IC, Chu KS, Tsai CJ, Wu CW, Kuo WR,

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Abstract BACKGROUND: Malpositioning of the endotracheal surface electrodes can result in dysfunction of intraoperative neuromonitoring (IONM) and increase the risk of recurrent laryngeal nerve injury. The purpose of this study was to investigate the optimal depth of the nerve integrity monitor (NIM) EMG endotracheal tube. METHODS: We enrolled 105 adult patients undergoing elective thyroidectomy. Each Medtronic Xomed NIM EMG endotracheal tube was placed with the middle of the exposed electrodes well in contact with the true vocal cords under direct laryngoscopy. Function of IONM was documented and the insertion depth was measured and analyzed. RESULTS: Ninety-nine (94.3\%) patients had successful IONM with the initial endotracheal tube position. Six (5.7\%) patients needed further tube depth adjustment under fiberoptic bronchoscopy. All patients were finally had successful IONM. The optimal mean depth was 20.6 +/- 0.97 cm in men and 19.6 +/- 1.0 cm in women (p < 0.01). There was the trend that taller subjects had a deeper tube depth (p < 0.05). CONCLUSION: We concluded that the mean depth of the NIM EMG tube would be a useful reference value for detecting the malposition of electrodes and adjusting the depth of tube during the operation. This article was published in World J Surg and referenced in Journal of General Practice

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