The directions for reconstitution of a medication indicate: "For IM use, add 6 mL sterile water for injection. Resulting solution contains 500 mg of medication per mL." The vial contains 3 grams of medication. How much diluent is added to the vial to prepare the medication for IM use?
6 mL
3 grams
500 mg/mL
1 mL
The Correct Answer is A
A. 6 mL: The directions explicitly instruct adding 6 mL of sterile water to the vial to achieve a final concentration of 500 mg/mL. This volume of diluent ensures proper reconstitution and accurate dosing for intramuscular administration.
B. 3 grams: This represents the total amount of medication in the vial, not the volume of diluent to be added. Confusing the total drug amount with diluent volume would result in incorrect preparation.
C. 500 mg/mL: This is the final concentration of the reconstituted solution, not the amount of diluent. It indicates the strength after adding the correct volume of sterile water.
D. 1 mL: Adding 1 mL of diluent would create a solution with a much higher concentration than intended, leading to potential dosing errors and increased risk of adverse effects.
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Related Questions
Correct Answer is C
Explanation
A. Standing order: Standing orders are scheduled, routine prescriptions that are carried out at regular intervals until discontinued or modified. This does not apply because the medication is needed only for a specific event.
B. PRN order: PRN (“as needed”) orders allow medication administration based on patient symptoms or need. While an anti-anxiety medication could be PRN, in this case it is given specifically before a procedure, not based on subjective symptom assessment.
C. One-time order: A one-time order specifies a single administration of a medication for a particular purpose or event, such as prior to an MRI. This ensures the patient receives the drug exactly when needed and does not continue beyond the intended timeframe.
D. STAT order: STAT orders require immediate administration due to urgent or emergent conditions. Administering a pre-procedure medication does not typically constitute an emergency, so STAT is not appropriate here.
Correct Answer is C
Explanation
A. Flush the IV catheter with saline to check patency: Flushing the catheter in the presence of swelling, pallor, and discomfort risks worsening infiltration or extravasation. Patency should not be tested when signs of tissue injury are present.
B. Notify the provider without stopping the infusion: Continuing the infusion can cause further tissue damage or complications. Immediate action to stop the infusion is required before contacting the provider.
C. Stop the infusion immediately and report to the physician: Swelling, pallor, and pain indicate infiltration or extravasation. The first priority is to stop the infusion to prevent further tissue injury, followed by assessment, documentation, and notification of the provider.
D. Increase the rate of infusion: Increasing the infusion rate would exacerbate tissue damage and is contraindicated in the presence of infiltration or extravasation.
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