A nurse is evaluating an 8-month-old infant's pain level following the administration of hydrocodone. Which of the following pain scales would the nurse use?

A) Arterial blood gases: Arterial blood gas (ABG) tests are typically used to assess respiratory and metabolic function, including the balance of oxygen and carbon dioxide in the blood. While important in many clinical situations, ABGs are not specifically relevant for monitoring a client on levothyroxine, as it does not directly affect gas exchange or acid-base balance.

B) Thyroid stimulating hormone (TSH): TSH is the most important laboratory test to monitor in a client taking levothyroxine, as this medication is used to replace or supplement thyroid hormone levels. Levothyroxine directly affects thyroid hormone levels in the body, so monitoring TSH levels is essential for determining whether the medication dosage needs to be adjusted. Elevated TSH levels may indicate that the dose is too low, while low levels may suggest an overdose.

C) Prothrombin time: Prothrombin time (PT) is used to assess blood clotting and coagulation status. While certain thyroid conditions can influence coagulation, PT is not a routine test to monitor in clients on levothyroxine therapy unless there are specific concerns related to bleeding or clotting. It is not the most relevant test for monitoring thyroid function in this context.

D) Blood urea nitrogen (BUN): Blood urea nitrogen (BUN) levels reflect kidney function and hydration status. While kidney function is always important to monitor, BUN is not specifically used to assess the effects of levothyroxine therapy. It would not provide direct information regarding the effectiveness of the medication or the thyroid status of the client.

A) Document the infiltration: While documentation is an important part of the nursing process, it is not the first action to take. If an infiltration is suspected, the priority is to stop the infusion immediately to prevent further harm or fluid leakage into the surrounding tissues. Once the infusion is stopped, the nurse can then document the infiltration for medical record purposes.

B) Elevate the arm: Elevating the arm can help reduce swelling, but this should not be the first step. The first priority when infiltration is suspected is to stop the infusion, as continuing it can worsen the tissue damage and swelling. After stopping the infusion, elevating the arm may be considered as part of the subsequent management of the infiltration.

C) Apply a warm compress: A warm compress may be helpful after stopping the infusion, particularly if the infiltration involves non-vesicant fluids. However, applying a warm compress is not the immediate action. The first step should be stopping the infusion to prevent any further fluid from infiltrating the tissues.

D) Stop the infusion: The most immediate and appropriate action when infiltration is noted around the IV insertion site is to stop the infusion. This prevents additional fluid from leaking into the surrounding tissues, which could cause further damage. Once the infusion is stopped, the nurse can take other steps to manage the infiltration, such as assessing the site, applying a warm compress, or notifying the healthcare provider.