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Table 2 Weaning readiness tests results

From: Utilization of spontaneous breathing trial, objective cough test, and diaphragmatic ultrasound results to predict extubation success: COBRE-US trial

Successful spontaneous breathing trial, n (%)

349/456 (76.5)

Objective measurement of cough, n (%)

 0

6/451 (1.3)

 1

34/451 (7.6)

 2

151/451 (33.5)

 3

260/451 (57.6)

Cuff leak test, ml, median (IQR)

238 (193–327)

RSBI, median (IQR)

56 (43–75)

Displacement diaphragmatic excursion cm, median (IQR)

1.9 (1.4–2.5)

Diaphragmatic inspiratory time s, median (IQR)

0.8 (0.62–1.01)

Duration of the diaphragmatic cycle s, median (IQR)

2.3 (1.8–2.9)

Diaphragmatic thickening fraction %, Median (IQR)

37 (20–52)

Velocity of diaphragmatic contraction cm/s, median (IQR)

2.3 (1.6–3.8)

  1. IQR interquartile range, RSBI rapid shallow breathing index, cm centimeters, s seconds
  2. 0 = No presence of cough
  3. 1 = Audible movement of air through the orotracheal tube, but no audible cough
  4. 2 = Strong cough with mobilization of secretions inside the orotracheal tube
  5. 3 = Strong cough with mobilization of secretions outside (expels) the orotracheal tube
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Critical Care

ISSN: 1364-8535