To prevent heat loss from convection in a newborn, which action by the nurse is best?

A. Human placental lactogen (hPL) is a hormone produced by the placenta that helps regulate the metabolism of the mother and fetus, but it is not used as the basis for pregnancy tests. It plays a role in modulating the metabolic state of the mother during pregnancy to facilitate the energy supply of the fetus.

B. Estrogen (estriol) is another hormone produced by the placenta, which is important for maintaining pregnancy and preparing the body for childbirth. However, it is not the hormone detected by pregnancy tests. Estriol levels increase significantly during pregnancy but are not used as a marker for pregnancy tests.

C. Progesterone (progestin) is crucial for maintaining the uterine lining and supporting early pregnancy. While it is essential for a successful pregnancy, it is not the hormone that pregnancy tests detect. Progesterone helps prevent uterine contractions and supports the endometrium.

D. Human chorionic gonadotropin (hCG) is the hormone detected by pregnancy tests. It is produced by the placenta shortly after the embryo attaches to the uterine lining. The presence of hCG in the blood or urine is a reliable indicator of pregnancy, which is why it is the basis for pregnancy tests.

A. Nalbuphine (Nubain):Nalbuphine is an opioid agonist-antagonist, which can be used to treat moderate to severe pain. However, it is not specifically used to reverse the effects of fentanyl. Administering Nalbuphine could potentially complicate the situation by introducing another opioid into the system.

B. Naloxone (Narcan):Naloxone is an opioid antagonist that rapidly reverses the effects of opioids like fentanyl. It is the standard treatment for opioid overdose and can quickly restore normal respiration in a person whose breathing has slowed or stopped due to opioid use. This makes it the most appropriate drug to have readily available in this scenario.

C. Butorphanol (Stadol):Butorphanol is another opioid agonist-antagonist used for pain relief. Similar to Nalbuphine, it is not used to reverse opioid effects and could complicate the patient's condition by adding another opioid to the system.

D. Promethazine (Phenergan):Promethazine is an antihistamine used to treat nausea, vomiting, and allergies. It does not have any properties that would counteract the effects of fentanyl. Therefore, it would not be useful in reversing opioid-induced respiratory depression.