Change of somatosensory function of the tongue caused by chorda tympani nerve disorder after stapes surgery
Change of somatosensory function of the tongue caused by chorda tympani nerve disorder after stapes surgery
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DOI：
10.1002/lary.26598
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发表时间：
2018-03-01
期刊：
影响因子：
2.6
通讯作者：
Sakagami, Masafumi
中科院分区：
文献类型：
--
作者：
Maeda, Emi;Katsura, Hirokazu;Sakagami, Masafumi
目的中耳手术后的患者经常抱怨味觉障碍和舌部麻木。本研究的目的是客观评估镫骨手术患者舌体感觉和味觉功能的变化。研究设计前瞻性研究。方法对41例镫骨手术患者（男13例，女28例，平均年龄41.8岁）手术前后进行味觉障碍和舌头麻木症状的调查。 28 名患者（9 名男性，19 名女性；平均年龄 43.1 岁）在手术前后接受了感觉和味觉功能测试。使用2点辨别测试和电刺激器测试在手术侧和非手术侧测量舌头的感觉功能。通过味觉电测（EGM）评估味觉功能。结果所有患者的鼓索神经（CTN）均被轻轻触摸或拉伸。接受所有三种测试的患者的所有测试中，手术侧的术后阈值均显着高于术前阈值。术后舌体感症状明显早于味觉障碍改善，感觉阈值随着症状的恢复而回到基线。结论这些研究结果表明，即使保留了CTN，术后也会出现CTN功能障碍，并且舌感觉神经阈值与舌麻木症状相关。 CTN可能不仅在味觉功能中发挥作用，而且在舌头的体感功能中也发挥作用。证据水平4。喉镜，128：701-706，2018
ObjectivesPatients after middle ear surgery often complain of taste disturbance and a lingual numbness. The purpose of this study was to objectively assess changes in the somatosensation of the tongue and taste function in patients undergoing stapes surgery.Study DesignProspective study.MethodsSymptoms of taste disturbance and tongue numbness after surgery were investigated before and after surgery in 41 patients (13 males, 28 females; mean age 41.8 years) who underwent stapes surgery. Twenty-eight patients (9 males, 19 females; mean age 43.1 years) underwent sensory and taste function tests before and after surgery. Sensory function of the tongue was measured at the operated side and the nonoperated side using the 2-point discrimination test and an electrostimulator test. Taste function was assessed with electrogustometry (EGM).ResultsThe chorda tympani nerve (CTN) was gently touched or stretched in all patients. Postoperative thresholds on the operated side were significantly higher than preoperative thresholds in all tests in the patients who underwent all three kinds of tests. Tongue somatosensory symptoms improved significantly earlier than the taste disturbance postoperatively, and the sensory thresholds returned to the baseline along with recovery of symptoms.ConclusionThese findings suggest that dysfunction of the CTN occurred following surgery even when the CTN was preserved, and that the sensory nerve threshold of the tongue correlated with the symptom of lingual numbness. The CTN may play a role not only in taste function but also in the somatosensory function of the tongue.Level of Evidence4. Laryngoscope, 128:701-706, 2018