Lung Point Sign in Ultrasound Diagnostics of Pneumothorax: Imitations and Variants
Table 1
A comparison of other ultrasonographic signs associated with the true lung point sign in pneumothorax with the signs related to the imitations of the lung point sign.
Ultrasound phenomenon
Interface of pleural sliding and absence of sliding
Barcode sign
A lines
Vertical phenomena
Lung pulse
Other specific findings
True lung point sign
+
+
+
−
−
−
Physiological lung point sign
+
−
−
−
+
Z-shape formed by the pleural line and pericardium; pulsating myocardial wall present
Pseudo-lung point sign
+
−
−
+
+
−
Bleb point sign
+
+
+
−
−
−
Pleurofascial point sign
+
−
−
−
−
Diaphragm and parenchymal organs below may be displayed
