Prediction of the Difficult Laryngoscopy with Ultrasound Measurements of Hyomental Distance
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2022-07-23
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Abstract
Ultrasound measurement of hyomental distance is promising as a predictor for difficult laryngo-scopy in cases of difficult airway management. The aim of the study was to evaluate the prognos-tic value of ultrasound measurement of hyomental distance (HMD) for prediction of difficultlaryngoscopy. Hyomental distance was sonographically measured in neutral (HMDn) and extremehead extension (HMDe) positions for fifty-six patients scheduled for elective surgery requiring tra-cheal intubation. Then the hyomental distance ratio (HMDR) was calculated. According to pres-ence of difficult laryngoscopy assessed by the Cormack–Lehane (CL) score, patients weredivided into a difficult laryngoscopy group (DL, n = 15) and easy laryngoscopy group (EL, n = 41).We calculated the sensitivity and specificity of HMDn, HMDe, and HMDR for difficult laryngo-scopy. DL was present in 15 (27%) patients. We found a significant intergroup difference inHMDR between the DL and EL groups (1.12 ± 0.04 vs. 1.24 ± 0.06, respectively;p< 0.001). Incontrast, we were not able to find a significant difference for HMDn and HMDr. HMDR had thehighest sensitivity 86.7% and specificity 85.4% (p< 0.01) to predict difficult laryngoscopy, wherethe area under the curve was 0.939;p< 0.01 for HDMR < 1.2 cm. Moreover, we found that diffi-cult laryngoscopy was associated with higher body mass index (BMI), with higher values in theDL group compared to EL patients (34.3 ± 9.1 vs. 28.5 ± 5.7 kg/m2, respectively;p= 0.035).HMDR < 1.2 cm measured by ultrasound might have a good predictive value for prediction of diffi-cult laryngoscopy.
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airway ultrasound measurements, difficult intubation, direct laryngoscopy, 3.2 Clinical medicine, 1.1. Scientific article indexed in Web of Science and/or Scopus database
Citation
Glāzniece-Kagane, Z, Bērziņš, A, Kagans, A, Grigorjevs, S, Ozoliņa, A & Mamaja, B 2022, 'Prediction of the Difficult Laryngoscopy with Ultrasound Measurements of Hyomental Distance', Proceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences., vol. 76, no. 3, pp. 372-376. https://doi.org/10.2478/prolas-2022-0057