the vital sign that the nurse should most certainly check before administering digoxin is:

Correct Answer: A

Rationale: Before administering digoxin, it is crucial for the nurse to check the patient's pulse rate. Digoxin is a medication commonly used to treat heart conditions such as atrial fibrillation and heart failure by increasing the strength and efficiency of the heart's contractions. However, digoxin can also cause adverse effects such as bradycardia (slow heart rate) or heart block. Therefore, it is important to assess the patient's pulse rate to ensure that it is within the safe range before administering digoxin.

Correct Answer: D

Rationale: Heavy meals close to bedtime disrupt sleep.

Correct Answer: C

Rationale: Adenotonsillar hypertrophy is the leading cause of obstructive sleep apnea in children.

Correct Answer: A

Rationale: After a lumbar puncture, it is important to have the patient lie flat for 6 to 8 hours to help prevent leakage of cerebrospinal fluid. Keeping the patient in this position can reduce the risk of developing a post-lumbar puncture headache. It allows the tiny hole created in the dura to seal properly and helps maintain proper cerebrospinal fluid pressure. This intervention is essential for the patient's safety and optimal recovery following a lumbar puncture procedure.

Correct Answer: D

Rationale: Vernix caseosa is the grayish white, cheeselike substance that normally covers a newborn's skin at the time of birth. It is a natural substance produced by the baby's skin glands while in the womb. Vernix caseosa helps protect the baby's delicate skin from the amniotic fluid in the uterus and acts as a moisturizer as well. It also has antimicrobial properties, providing a barrier against infection. After birth, healthcare providers typically wipe off or gently wash the vernix from the baby's skin during the first bath.