Which of the following is NOT included in the diagnostic labwork for critically ill patients?

In the context of diagnosing conditions in critically ill patients, it is important to focus on tests that provide crucial information regarding the patient's hemodynamic status, organ function, and potential underlying conditions.

A complete blood count (CBC) is an essential lab test that helps monitor the patient's overall health and detect a variety of conditions, such as anemia and infections. Troponins are specific markers for myocardial injury and are vital in the evaluation of cardiac complications that may occur in critical illness. Lactate levels are also critical as they help assess tissue perfusion and metabolic status, informing about possible septic states or other forms of shock.

Urinalysis, while potentially useful in specific scenarios—such as urinary tract infections or renal function assessments—is generally not a core part of the immediate diagnostic lab workup in critically ill patients. The focus in critical care tends to prioritize tests that directly inform clinical management and immediate life-saving interventions, which may not typically involve urinalysis unless there is a strong clinical indication.