In the last decade, ultrasound has found its place in the intensive care unit (ICU). Initially, ultrasound was used primarily to increase the safety and efficacy of line insertion, but now many intensivists use point-of-care ultrasound (POCUS) to aid in diagnosis, assess therapy and support therapeutic interventions. In this series, we aim to highlight one specific POCUS technique at a time, which we believe will prove to be useful in your clinical practice. Focused cardiac ultrasound (FoCUS) is an important tool for the intensivist and can help in, among other things, diagnosing undifferentiated shock, evaluating the response to therapy and guiding procedures. FoCUS has, until recently, been performed with transthoracic echocardiography (TTE). FoCUS-TTE is, however, not always possible and not without problems. In this issue, we aim to describe the merits and pitfalls of focused transoesophageal echocardiography (FoCUS-TEE) in the ICU.
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