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A nurse is reviewing laboratory results for a patient just admitted to the intensive care unit. The patient is not known to have diabetes, but initial non-fasting blood sugar is 140 mg/dL. At which point would the nurse expect insulin therapy to begin?
1. When fasting blood sugar exceeds 110 mg/dL
2. When the patient shows assessment findings associated with hyperglycemia
3. If another random blood glucose is in the same range as this initial reading
4. When fasting blood glucose levels reach 180 mg/dL

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The perfect answer + explanation, thanks for this