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Urine output (UO) is a well-established index of organ perfu-  only feasible but, with adequate understanding and prepared-
              sion. Accurate UO is considered standard of care in patients in   ness, can drastically reduce preventable causes of death.
              active shock. Ultrasound and echocardiography are invaluable
              tools in not only in the monitoring of shock but also in differ-  Acknowledgments
              entiation. For instance, early recognition of McConnell’s sign   The authors would like to thank Dr Steven Simpson for his
              for massive pulmonary embolism – right ventricular hypokine-  contribution.
              sia with preserved apical contractility – may hasten triage and
              treatment. Further ultrasonography specifics are beyond the   References
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