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Acta médica Grupo Ángeles
versión impresa ISSN 1870-7203
Resumen
MORALES GAMEZ, Jessica Lizbeth et al. Evaluation of the difficult airway through ultrasound with linear transducer. Acta méd. Grupo Ángeles [online]. 2022, vol.20, n.4, pp.307-311. Epub 26-Mayo-2023. ISSN 1870-7203. https://doi.org/10.35366/107113.
Objective:
The aim of this study is to prove that ultrasound is a helpful tool for predicting difficult airways.
Material and methods:
This is a descriptive, retrospective, and transversal study, which is based on a 30-patient sample, ASA ≤ 3, who needed endotracheal intubation prior to operation. We measured the distance from skin to epiglottis, through the thyrohyoid membrane, with an ultrasound. We used a cut-off value of 27.5 mm in order to predict difficult airways. We compared the result to the gold standard, which was a laryngoscopy, and we considered as “difficult airway” those in which: a) three or more attempts to intubate were needed, b) took more than 10 minutes to intubate, and c) had Cormack-Lehane grades III and IV.
Results:
We found that an ultrasound with a sensitivity of 50% CI 95% [21.5-78.5], specificity of 90.9% CI 95% [72.2-97.5], PPV 66.7% CI 95% [30-90.3] NPV 83.3% CI 95% [62.7-90.5], and accuracy of 80% CI 95% [62.7 a 90.5]; 10 OR CI 95% [1.34-74.5] predicts difficult airway.
Conclusion:
The ultrasound is a valuable tool for the prediction of difficult airways because of its accessibility and its high specificity and negative predictive value.
Palabras llave : Difficult airway; ultrasound; linear transducer; difficult airway prediction.