Fig. 16
From: Ultrasound and non-ultrasound imaging techniques in the assessment of diaphragmatic dysfunction
Reproduced with permission from Springer Nature: Vivier et al. Intensive Care Med 2012;38(5):796–803
Relationship between the thickening of the diaphragm recorded with ultrasonography and changes in the pressure–time product of the diaphragm (PTPdi) in 12 patients during pressure support ventilation set at 5, 10, 15 cm H2O (PS 5, PS 10 and PS 15, respectively) and during unsupported breathing (SB). Diaphragm thickening increased as PTPdi increased. The correlation between diaphragm thickening and PTPdi was significant (ρ = 0.74, p < 0.001) yet, the interindividual variability was high.