Page 45 - Ultrasonography in Prehospital and Emergency Medicine - Rein Ketelaars
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In high altitude medicine, Wimalasena described the value of lung US in the early detection of high altitude pulmonary edema (HAPE) before symptoms appear, and in differentiating HAPE from other causes of dyspnea such as pneumonia or pneumothorax.43 The number of B-lines, indicating an increased amount of EVLW, is inversely correlated with the oxygen saturation and both values improve on (early) treatment.44
B – Chest, traumatic
Pneumothorax
Using PoCUS for detecting pneumothorax is feasible, fast, without any radiation, has a steep learning curve and high diagnostic accuracy, and it allows for dynamic and repeated exam- inations.45,46
Figure 2.2 Normal lung + B-lines
A normal lung ultrasound image acquired with a 5-1 MHz phased array cardiac transducer. In the middle of the image one B-line is seen. This is also seen in healthy subjects and a single B-line is without meaning.
ABCDE of prehospital ultrasonography 43
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