Diagnostic ultrasound is a non-invasive imaging modality that uses high-frequency sound waves to generate images of structures inside the body. Through the advancements of biomedical technologies, medical ultrasound systems have evolved and, especially in the last two decades, the miniaturization of ultrasound machines has become feasible. The advent of portable machines and the development of handheld devices have made possible an evolution for the role of ultrasounds in healthcare system, emerging as an invaluable tool for first-level diagnosis in emergency wards. This practice is called point-of-care ultrasound (POCUS), and allows physicians to obtain immediate and quick assessments while evaluating their patients, as an aide to traditional examination techniques.