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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