For a patient who is experiencing an ECV excess, the nurse plans to determine the fluid status. The best way for the nurse to determine the fluid balance for the patient is to:

A. 0.9% sodium chloride (normal saline) is isotonic, meaning it has the same concentration of solutes as blood plasma. It is used to expand intravascular volume and replace fluids and electrolytes.

B. "Hypnotic" refers to medications that induce sleep and has no relevance to IV solutions. This term does not apply to IV solutions.

C. A hypotonic solution has a lower concentration of solutes compared to normal body fluids. Examples include 0.45% sodium chloride (half-normal saline) or 5% dextrose in water (D5W). 0.9% sodium chloride (normal saline) is not hypotonic; rather, it is isotonic.

D. A hypertonic solution has a higher concentration of solutes compared to normal body fluids. Examples include 3% sodium chloride or 5% dextrose in 0.9% sodium chloride. 0.9% sodium chloride (normal saline) is not hypertonic; rather, it is isotonic.

B. Before administering any medication, especially antibiotics like amoxicillin, the nurse must assess the patient for allergies or previous adverse reactions to amoxicillin or other beta-lactam antibiotics. Allergic reactions can range from mild rashes to severe anaphylactic reactions, so it's essential to confirm the

patient's allergy status and assess for any signs or symptoms of allergic reaction before proceeding with administration.

A. Flushing the IV site with normal saline is typically not required specifically before administering IV amoxicillin unless it is part of the institution's standard practice to flush all IV lines before and after medication administration.

C. While monitoring intake and output (I&O) is important for assessing fluid balance and kidney function, it is not directly necessary before administering IV amoxicillin unless there are specific concerns related to the patient's fluid status or renal function. However, it is good practice to have a general understanding of the patient's recent fluid intake and output patterns.

D. Creatinine clearance is a measure of kidney function. Checking the latest creatinine clearance result is important for assessing renal function, especially before administering medications excreted by the kidneys. However, amoxicillin is primarily excreted by the kidneys in its unchanged form, so knowing the patient's renal function status can help in determining the appropriate dosage or adjusting the dosing interval if necessary.