[Ultrasound's tips and pitfalls]

Ultrasound represents the 5th pillar of the clinical examination. There is no doubt about his improvement of diagnostic performance on the bedside examination. The POCUS (Point Of Care UltraSound) provides a binary answer to a simple question : « Does this suprapubic mass correspond to an overdistended bladder ? Is this cervical nodule a lymph node ? ». But be careful, as with any exam, you must know the main technical and interpretation difficulties. This article gives some tips, mainly for beginners, and shows some pitfalls that could lead to misinterpretation through ignorance.