Portable, personal clinical ultrasound probes significantly improve patient care. They enable earlier, safer pre-diagnosis, and improve the relationship between professional and patient. On a hospital scale or, more generally, in terms of healthcare organization, they can also represent a significant cost saving. The ultra-portable, personal nature of this type of probe means greater responsiveness and, more generally, more widespread use of clinical ultrasound, which is in the interests of public health. Clinical ultrasound must become a reflex in the first year of medical school. echOpen O1 allows much more ultrasound to be performed during clinical examinations than is currently the case.