PoCUS is an high yield adjunct to complement to clinical, laboratory, and other diagnostic modalities.  It may not elcudiate the exact etiology for the shock though it will help differentiate the classes of shock to direct further investigation and management.

Pleural effusion is the most common  pleural space pathology encountered. However, sometimes, that opacity at the base of the thorax on a CXR may not be fluid, or much less than expected.  

Not only does PoCUS of the thoracic space visually verifies the differential diagnosis on physical examination and/or CXR, it, also, may change and expedite the course of managment.

One of the MOST difficult dilemma confronted by General Internal Medicine.  Fluid or diurese?  Truthfully, even PoCUS alone cannot answer that question completely particularly when it is in the context of RV failure.  Hopefully, the case will visually, yet indirectly, illustrate that it is the Reverse Bernheim (aka. interventricular dependence) and NOT the so-called myocardial stretch beyond the Starling's Curve that causes the reduced cardiac output.

Acute kidney injury is one of the most common issues that an Internist encounters.  Algorithmically, the first category of etiologies to investigate for is post-renal causes of AKI.  With PoCUS, this question can be answered immediately and expedite the management.