Determination of the Accuracy of Thyromental Height Test for Predicting Difficult Laryngoscopy in Obstetric Patients Who Are Candidates for Cesarean Section: An Observational Study

IF 1.5 Q3 MEDICINE, RESEARCH & EXPERIMENTAL

Current Therapeutic Research-clinical and Experimental Pub Date : 2025-01-01 DOI:10.1016/j.curtheres.2025.100784

Saghar Samimi Sadeh MD , Babak Moayer MD , Masoomeh Natajmajd MD , Parisa Kianpour PharmD , Kousha Farhadi MD , Mahgol Etezadi PharmD , Mojgan Rahimi MD , Farhad Etezadi MD

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引用次数: 0

Abstract

Background

Pregnant women frequently have face and upper airway edema, which makes managing the airways during anesthesia difficult and increases the risk of mask breathing complications and intubation failure. This necessitates an investigation into the sensitivity of various airway tests in predicting difficult intubation.

Objective

To assess the accuracy of the thyromental height test (TMHT) in predicting difficult laryngoscopy in obstetric patients undergoing cesarean section and to compare its effectiveness with other airway assessment methods.

Methods

We included a cohort of obstetric patients, approved by the Ethics Committee of Tehran University of Medical Sciences, scheduled for elective cesarean sections. During laryngoscopy, preoperative evaluations of the airway were done. The primary aim was to determine the relationship between TMHT (the distance between mentum and the thyroid cartilage) and the Cormack-Lehane (which categories laryngoscopy view from fully observable vocal cords to nonvisible epiglottis) classification, which indicates the level of difficulty in laryngoscopy.

Results

After eligibility assessment, 156 patients entered the study, of which 16 had Cormack-Lehane grades III and IV and were considered difficult laryngoscopy. The TMHT demonstrated a higher Matthews correlation coefficient (0.695), sensitivity (0.75), and specificity (0.96) compared with other tests, suggesting that TMHT has the potential to serve as a dependable predictor of challenging laryngoscopy.

Conclusions

The use of TMHT can improve patient outcomes and the preoperative evaluation process, making it a valuable tool for anesthesiologists managing obstetric patients. The TMHT could be considered a complementary tool to existing airway assessment methods, particularly in obstetric patients, due to its high predictive accuracy and ease of use.

This study is registered at Iranian Registry of Clinical Trial (IRCT) under identifier code of IR.TUMS.SINAHOSPITAL.REC.1399.061.

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确定甲状腺高度测试预测剖宫产产科患者喉镜检查困难的准确性：观察研究

孕妇经常出现面部和上气道水肿，这使得麻醉期间气道管理困难，增加了面罩呼吸并发症和插管失败的风险。这就需要对各种气道试验在预测插管困难方面的敏感性进行研究。目的评价甲状腺高度试验（TMHT）预测产科剖宫产患者喉镜检查困难的准确性，并与其他气道评估方法进行比较。方法纳入一组经德黑兰医科大学伦理委员会批准，计划择期剖宫产的产科患者。在喉镜检查期间，对气道进行术前评估。主要目的是确定TMHT（颏部与甲状软骨之间的距离）与Cormack-Lehane（将喉镜视点从完全可见的声带到不可见的会厌）分类之间的关系，这表明喉镜检查的难度程度。结果经过资格评估，156例患者进入研究，其中16例为Cormack-Lehane III级和IV级，被认为喉镜检查困难。与其他测试相比，TMHT显示出更高的马修斯相关系数（0.695）、敏感性（0.75）和特异性（0.96），这表明TMHT有可能作为喉镜检查的可靠预测指标。结论使用TMHT可以改善患者预后和术前评估过程，使其成为麻醉师管理产科患者的有价值的工具。TMHT可被视为现有气道评估方法的补充工具，特别是在产科患者中，由于其预测准确性高且易于使用。本研究已在伊朗临床试验登记处（IRCT）注册，识别码为IR.TUMS.SINAHOSPITAL.REC.1399.061。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Current Therapeutic Research-clinical and Experimental 医学-药学

CiteScore

3.50

自引率

0.00%

发文量

审稿时长

3 months

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