Fig. 2
(Adapted from Oxorn and Pearlman [1])
The expertise pyramid. The conventional perception of ultrasound competency expressed in the expertise pyramid. The point-of-care examination is placed as the lowest level of expertise, and the pyramid visualizes how the physician can extend their expertise to advance to more sophisticated levels. The underlying assumption is that PoCUS is an inferior examination. The pyramid does not permit point-of-care ultrasound to possess strengths, such as speed, cost, and availability, which are superior to the layers above it