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Ultrasound guided measurement of anterior neck tissue for the prediction of difficult airway: A prospective observational study Cover

Ultrasound guided measurement of anterior neck tissue for the prediction of difficult airway: A prospective observational study

Open Access
|Dec 2022

Figures & Tables

Relationship between airway parameters and screening parameters_

DSEM (cm)DSHB (cm)DSAC (cm)MMSTMD (cm)IIG (cm)NC (cm)SD (cm)
r-valueP-valuer-valueP-valuer-valueP-valuer-valueP-valuer-valueP-valuer-valueP-valuer-valueP-valuer-valueP-value
DSEM (cm)--.559<0.001.784<0.001.437<0.001-.324.001.007.943.399<0.001-.167.097
DSHB (cm).559<0.001--.532<0.001.550<0.001-.365<0.001-.016.875.429<0.001-.246.014
DSAC (cm).784<0.001.532<0.001--.530<0.001-.408<0.001.118.242.334.001-.310.002
MMS.437<0.001.550<0.001.530<0.001---.256.010.051.615.335.001-.284.004
TMD (cm)-.324.001-.365<0.001-.408<0.001-.256.010--.349<0.001.065.519.419<0.001
IIG (cm).007.943-.016.875.118.242.051.615.349<0.001--.166.100.122.228
NC (cm).399<0.001.429<0.001.334.001.335.001.065.519.166.100---.228.022
SD (cm)-.167.097-.246.014-.310.002-.284.004.419<0.001.122.228-.228.022--

Airway evaluating parameters for predicting difficult laryngoscopy_

VariableDifficult (n=39)Easy (n=61)P-value
MMS<0.001
MMS 16 (15.4%)24 (39.3%)
MMS 25 (12.8%)31 (50.8%)
MMS 325 (64.1%)6 (9.8%)
MMS 43 (7.7%)0 (0.0%)
ULBT<0.001
ULBT 129 (74.4%)61 (100%)
ULBT 210 (25.6%)0 (0%)
TMD6.61 ± 1.027.62 ± 1.26<0.001
IIG6.29 ± 0.856.34 ± 0.570.76
SD16.34 ± 2.4117.60 ± 1.570.002
NC35.18 ± 3.1433.13 ± 2.640.001
DSHB1.03 ± 0.200.82 ± 0.13<0.001
DSEM1.49 ± 0.111.14 ± 0.14<0.001
DSAC1.92 ± 0.151.43 ± 0.10<0.001

Demographic data of the patients with difficult and easy laryngoscopy_

VariableDifficult (n = 39)Easy (n = 61)P-value
Age41.05 ± 12.9738.20 ± 10.760.24
Sex (M/F)13(33.3%)/26(66.6%)29(47.5%)/32(52.5%)0.21
ASA (I/II)29(74.4%)/10(25.6%)42(68.9%)/19(31.1%)0.61
Height157.97 ± 5.25157.48 ± 5.630.66
Weight63.87 ± 11.6156.89 ± 9.010.01
BMI25.59 ± 4.1022.89 ± 3.21<0.01

The area under the ROC curves (AUC) for DSEM, DSHB, DSAC, TMD, and MMS_

VariableAUC ± SEP-value95% CI
DSHB0.799 ± 0.052<0.0010.698 to 0.901
DSEM0.975 ± 0.012<0.0010.951 to 1.0
DSAC0.999 ± 0.001<0.0010.997 to 1.0
TMD0.725 ± 0.054<0.0010.619 to 0.830
MMS0.800 ± 0.051<0.0010.700 to 0.899

Table Optimal cut-off values with sensitivity and specificity to predict difficult laryngoscopy_

VariableCut-off valuesSensitivitySpecificity
DSEM1.3493%82%
DSHB0.9892%69%
DSAC1.68100%95%
TMD6.5987%54%
MMS290%72%
DOI: https://doi.org/10.2478/rjaic-2021-0018 | Journal eISSN: 2502-0307 | Journal ISSN: 2392-7518
Language: English
Page range: 105 - 110
Published on: Dec 29, 2022
Published by: Sciendo
In partnership with: Paradigm Publishing Services
Publication frequency: 2 issues per year

© 2022 Reema Kaul, Dipali Singh, Jay Prakash, Shio Priye, Sourabh Kumar, Bharati, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.