The nurse is caring for a client receiving an intravenous medication that is a vesicant. The IV flow has stopped and there is pain, burning and swelling at the IV site. What action should the nurse take first?

A. Isotonic solutions have a similar osmolarity to that of blood plasma, meaning they exert the same osmotic pressure as blood. This equilibrium prevents the movement of water across cell membranes, thereby maintaining cell volume and preventing cellular dehydration or swelling. Examples of isotonic solutions commonly used for intravenous fluid replacement include 0.9% saline (normal saline) and lactated Ringer's solution.
B. Hypotonic solutions have a lower osmolarity than blood plasma, meaning they exert less osmotic pressure than blood. When administered, hypotonic solutions cause water to move into cells, leading to cellular swelling. While hypotonic solutions can help hydrate cells and replenish intracellular fluid, they are not typically used for rapid volume replacement because they can exacerbate extracellular fluid deficits and cause complications such as cerebral edema or cardiovascular collapse.
C. Hypertonic solutions have a higher osmolarity than blood plasma, meaning they exert greater osmotic pressure than blood. When administered, hypertonic solutions cause water to move out of cells, leading to cellular shrinkage. Hypertonic solutions are often used to expand intravascular volume in cases of severe hypovolemia or shock, as they rapidly increase blood osmolarity and draw fluid from the interstitial space into the bloodstream. Examples of hypertonic solutions include 3% saline and 5% dextrose in 0.9% saline.
D. Hyperosmotic solutions have an elevated osmolarity compared to blood plasma, indicating a higher concentration of solutes. These solutions exert osmotic pressure that draws water out of cells, leading to cellular dehydration. While hyperosmotic solutions are not commonly used for rapid volume replacement due to their pot

D. Calling the prescribing physician to clarify the order is the most appropriate action in this situation. Direct communication with the physician allows the nurse to express concerns, seek clarification, and ensure that the medication order is appropriate and safe for the client.
A. Administering a medication at a higher than recommended dose could potentially harm the client and is not in line with safe medication administration practices. It's essential to follow the established guidelines and recommendations for medication dosing to avoid adverse effects or complications.
B. Holding the ordered dose and documenting the rationale is an appropriate initial action. This allows the nurse to pause the administration of the medication, prevent potential harm to the client, and provide a clear record of the decision-making process. Holding the dose also provides an opportunity for further clarification with the prescribing physician.
C. While reporting a mistake to the pharmacy is important, it may not be the most immediate action to take when dealing with a higher than recommended dose of medication. Direct communication with the prescribing physician is necessary to clarify the order and ensure appropriate action is taken promptly.