PMC5925953_01
Chest radiograph showing elevation of both hemidiaphragms and reduced lung volumes.
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fig1
The chest X-ray showed an elevation of both hemidiaphragms (Fig. 1).
A. Flow-volume curve in sitting position (in pink) and in supine position (in black). B. Volume-time curve in sitting position (in pink) and in supine position (in black) *Note that tidal volume loop is very closed to residual volume; this could happen because the paralyzed diaphragm, without tone, can be pulled upwards by the intrathoracic negative pressure leaving very little left to exhale (see Table 1 for lung volumes).
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fig2
The changes of the flow-volume curve from the sitting position to the supine position can be seen in Fig. 2.