Fig. 14
From: Ultrasound and non-ultrasound imaging techniques in the assessment of diaphragmatic dysfunction
Reproduced with permission from The American Thoracic Society: Gottesman et al. Am J Respir Crit Care Med 1997;155(5):1570–4
Values of diaphragm thickness at resting functional residual capacity (FRC) and percentage increase in thickness on inhaling from FRC to total lung capacity (TLC) in 5 patients with bilateral diaphragm paralysis, in 7 patients with unilateral diaphragm paralysis, 3 patients with normal function, and 15 healthy volunteers. A paralyzed diaphragm (solid symbols) could be distinguished from a functioning diaphragm (open symbols) by a resting thickness of less than 2Â mm and a less than 20% increase in thickening on inhaling to TLC.