Over the last 5 years, several key trends have emerged which challenge the established paradigm of inpatient computed tomography (CT) services. Many widespread practices seem intuitive and have become dogmatic; these include pre-hydration for renal injury, holding medications which predispose to metabolic acidosis, steroid administration for allergies, oral contrast administration, and fasting. The efficacy and cost-benefit of all of these measures have been challenged by recent publications. A common theme has emerged, delaying inpatient CT scans worsens patient outcomes and increases cost.
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