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Table 3 Upper airway ultrasound and CT of the study population (N = 50)

From: Ultrasound as a bedside tool for diagnosis of post-intubation tracheal stenosis

  Stenosis (n = 12) No-stenosis (n = 18) p value
Laryngeal ultrasound
ACW deflation at 1st day (mm)    0.615
  Mean ± SD 7.217 ± 0.57 7.418 ± 0.71
ACW deflation at weaning (mm)    0.021*
  Mean ± SD 5.808 ± 0.78 6.41 ± 0.85
ACW inflation at weaning (mm)    0.631
  Mean ± SD 5.283 ± 0.68 5.48 ± 0.79
ACWR    0.013*
  Mean ± SD 0.803 ± 0.06 0.863 ± 0.07
ACWD (mm)    0.002**
  Mean ± SD 0.525 ± 0.26 0.932 ± 0.39
Tracheal US
Tracheal diameter at 1st day (mm)    0.955
  Mean ± SD 16.43 ± 1.77 16.45 ± 1.062
Tracheal diameter at weaning (mm)    0.152
  Mean ± SD 15.05 ± 1.18 15.73 ± 1.28
Mucosal irregularity, no.    < 0.001***
  (%) Normal 1 (8.3) 35 (92.1)
  Irregular 11 (91.7) 3 (7.9)
CT
Laryngeal width by CT (mm)    
  Mean ± SD 5.9 ± 0.67 7.34 ± 0.81 < 0.001***
Tracheal diameter by CT (mm)    < 0.001***
  Mean ± SD 14.017 ± 0.8.5 16.1 ± 1.004
  1. ACW Air column width, ACWR Air column width ratio, ACWD Air column width difference
  2. *Statistically significant