Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
This M-mode image demonstrates a linear, laminar pattern in the tissue superficial to the pleural line (arrow) and a similar linear pattern deep to the pleural line. This phenomenon, known as the “stratosphere sign” or “barcode sign” indicates absent lung sliding and suggests the presence of pneumothorax at this interspace
