Fig. 2From: Can diaphragmatic ultrasonography performed during the T-tube trial predict weaning failure? The role of diaphragmatic rapid shallow breathing indexM-mode sonography of the diaphragm of a a representative patient with an impaired right diaphragmatic displacement (DD = 6 mm) and b a representative patient with a conserved right hemidiaphragm function (DD = 14.8 mm). DD was measured on the vertical axis of a frozen image from the baseline, at the end of expiration, to the point of maximum height of inspirationBack to article page