Incremental value of thoracic ultrasound in intensive care units: Indications, uses, and applications

Figure 2 Bat sign with convex probe. Consistsmake of two adjacent ribs with the pleural line between [upper and lower ribs are the “wings” of the “bat”(a), whileand, the pleural line that is the “back body” of the “bat” (arrow)]. Under Below the pleural line it is also possible to see two A-lines.