Fig. 4
From: Ultrasound and non-ultrasound imaging techniques in the assessment of diaphragmatic dysfunction
Adapted with permission from Springer Nature: Goligher et al. Intensive Car Med 2015;41(4):642–9
Relationship between the thickening of the diaphragm recorded with ultrasonography and changes in transdiaphragmatic pressure (∆Pdi; left panel) and diaphragmatic electrical activity (∆EAdi; right panel) in five healthy subjects during a series of inspiratory maneuvers. Diaphragmatic thickening increased as transdiaphragmatic pressure (left panel) and electrical activity of the diaphragm (right panel) increased. The correlation was weak (r2 = 0.32 and 0.28, respectively, p < 0.01).