Comprehensive clinical evidence for pulmonary embolism diagnosis and workup.

The article by Nazerian et al 1 in this issue of CHEST (see page 950 ) strives to demonstrate that “multiorgan ultrasonography sensitivity is signifi cantly superior to that of lung, heart, and leg vein ultrasonography alone,” and aims to establish “a diagnostic algorithm based on multiorgan ultrasonography for patients with suspected pulmonary embolism [PE].” 1 We itemize some limitations of this report. First, thoracic ultrasound (TUS) was performed mainly on supine patients, although most of the lesions described were located posteriorly . 1 Only 70% of the subpleural lung is visible by TUS, 2