Thoracic Ultrasound

M-Mode for Pneumothorax

Pneumothorax -> M (Motion) Mode


  • Normal motion seen below pleural line
  • “Seashore sign”

cxr in trauman
cxr supine image

Narration

One way that we could represent the motion from lung sliding in a still image is to use M-mode or motion mode, and this is where you take a one dimensional line put it across the pleural line and look at it over time and when you do that you can see that the portion of the image on the left has an area where there is motion represented in the inferior half of the field, this is called the “seashore sign” it looks sort of like waves coming into the beach and its nice and happy and normal.




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