A nurse in the recovery room is assessing a client who has a new chest tube. The nurse finds that the water seal is no longer tidaling. The nurse should identify the finding as resulting from which of the following?

A. Levothyroxine is a thyroid hormone replacement medication commonly used to treat hypothyroidism. It is not associated with teratogenic effects when used appropriately.

B. Phenytoin is an anticonvulsant medication that is known to be teratogenic, especially when used during the first trimester of pregnancy. It is associated with an increased risk of congenital malformations, such as cleft palate and heart defects, in infants born to mothers who take the medication during pregnancy.

C. Magnesium oxide is a mineral supplement commonly used to treat constipation during pregnancy. It is not associated with teratogenic effects when used appropriately.

D. Ferrous sulfate is an iron supplement commonly used to treat chronic anemia during pregnancy. It is not associated with teratogenic effects when used appropriately.

A. Using the injection port farthest from the IV catheter insertion site is not necessary for administering an IV bolus of medication and may not be practical depending on the setup of the IV tubing.

B. Occluding the IV tubing above the injection port prevents the bolus medication from flowing into the continuous IV infusion, ensuring that the medication is delivered directly to the patient.

C. Checking for blood return after medication administration is not relevant in this context, as albumin 5% is administered intravenously and does not require blood return.

D. Flushing the IV tubing with a heparinized solution is not necessary for administering an IV bolus of medication and may not be appropriate for all medications.