Doctor orders to give medication X 300mg and available is 900mg/6ml.

Explanation

Core Concept: Accurate liquid medication preparation requires basic ratio and proportion calculations to ensure patient safety and therapeutic efficacy.

Clinical Presentation:

• Classic symptoms: N/A (Calculation scenario).
• Complications: Medication administration errors.

Diagnosis:

• First-line diagnostic plan/tool: Standard dosage calculation formula: (Desired / Have) × Volume.
• Most accurate (gold standard) diagnostic test: Independent double-check of the math.

Management:

• Acute management: Apply the formula: Desired = 300 mg. Available = 900 mg in 6 ml. (300 / 900) × 6 ml = (1/3) × 6 ml = 2 ml.
• Gold standard long-term/definitive management: Administer exactly 2 ml of the medication. Ensure the medication is properly labeled, and document the administration in the patient's medical record.