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- W2175909056 abstract "Universidad Nacional de Colombia, Bogotá, Colombia. darinconv@unal.edu.coIn their meta-analysis, Shiga et al. 1review the diagnostic accuracy of bedside tests for predicting difficult intubation in patients with no airway pathological features. This analysis did not take into account tests proposed by other authors, such as the upper lip bite test2or indirect laryngoscopy,3probably because of the exclusion criteria that were applied. The authors carried out an analysis with a Bayesian focus based on sensitivity, specificity, and likelihood ratios in which they suggest that “combinations of individual test or risk factors add some incremental diagnostic value in comparison to the value of each test alone.” This would lead us to think that the addition of likelihood ratios from various tests is useful in predicting difficult laryngoscopy. However, this focus makes two big assumptions. The first is that sensitivity, specificity, and likelihood ratios are not modified with the incidence, and the second is that the tests used to modify the probability are completely independent. Although the first assumption is not true, that is not a limitation for clinical application of this tool. However, the second assumption does not permit application of this approach to the prediction of difficult laryngoscopy, in that the tests are based on physical examination of the head and neck, which makes it impossible to suppose that they are independent. Also, the authors do not directly take into account the agreement between observers, which is another factor that interferes with the operational performance of a diagnostic test.In addition, the evaluated outcome is only useful for predicting difficult laryngoscopy. Other studies have shown the poor correlation between the Cormack classification and difficulty in intubation.4Given the above, it is clear that clinical research on the prediction of a difficult airway should focus on multivariable analysis to predict difficult intubation5and difficult mask ventilation,6which both permits the combination of interdependent tests and also evaluates outcomes with greater clinical interest.Universidad Nacional de Colombia, Bogotá, Colombia. darinconv@unal.edu.co" @default.
- W2175909056 created "2016-06-24" @default.
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- W2175909056 date "2006-03-01" @default.
- W2175909056 modified "2023-09-23" @default.
- W2175909056 title "Predicting Difficult Intubation" @default.
- W2175909056 doi "https://doi.org/10.1097/00000542-200603000-00037" @default.
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