Skip to main content

Table 2 Diaphragm thickness and thickening fraction based on changes in thickness in first 4 days of mechanical ventilation

From: The impact of critical illness on the expiratory muscles and the diaphragm assessed by ultrasound in mechanical ventilated children

  Overall study population (n = 34) > 10% decrease (n = 15) Within 10% of baseline (n = 10) >10% increase (n = 9) P value
Baseline measurements
 Thickness at end-expiration (mm) 1.5 (1–1.6) 1.6 (1.1–1.6) 1.4 (0.8–1.6) 1.1 (1.0–1.5) 0.253
 Thickening fraction (%) 10.7 (7.5–16.2) 9.1 (4.9–13.0) 16.3 (11.9–23.6) 10.7 (7.3–13.2) 0.029a
Last measurements (day ≤ 4)
 Thickness at end-expiration (mm) 1.3 (0.9–1.6) 1.2 (0.8–1.4) 1.3 (0.9–1.7) 1.6 (1.3–1.7) 0.017b
 Thickening fraction (%) 12.4 (5.7–16.6) 7.1 (0.9–15.6) 12.6 (9.7–15.3) 16 (11.0–21.7) 0.147
Average over first 4 days
 Thickening fraction (%) 11.4 (9.7–14.5) 9.9 (8.6–12.2) 12.8 (10.5–18.1) 12.5 (10.6–16.4) 0.051c
  1. Data are presented as median (IQR)
  2. Patients are divided into 3 subgroups according to the change in diaphragm thickness during ≤ 4 days of MV
  3. IQR, interquartile range, MV, mechanical ventilation
  4. aBetween patients with > 10% decrease and ≤ 10% change in diaphragm muscle thickness, and between patients with > 10% increase and ≤ 10% change in diaphragm muscle thickness
  5. bBetween patients with > 10% increase and patients ≤ 10% change in diaphragm thickness
  6. cBetween patients with > 10% decrease and ≤ 10% change in diaphragm thickness