Problem 65 - Cliffs Test Prep NCLEX-RN

Question

Glucocorticoids are administered to some women in preterm labor. The expected effect of these agents is: 1\. to block oxytoxin, thus terminating preterm labor. 2\. to increase progesterone levels, thus promoting continuation of the pregnancy. 3\. to reduce inflammation and infection. 4\. to accelerate fetal lung maturation. (4) The glucocorticoid, betamethasone, is used

Step-by-Step Solution

Answer

Glucocorticoids accelerate fetal lung maturation (Option 4).

Step 1: Understand the question

The exercise asks for the expected effect of glucocorticoids like betamethasone when administered to women in preterm labor. We need to evaluate each option to determine the correct effect.

Step 2: Evaluate Option 1

Option 1 suggests that glucocorticoids block oxytocin to terminate preterm labor. Oxytocin is a hormone that stimulates uterine contractions, but glucocorticoids are not used primarily to block it; thus, this option is incorrect.

Step 3: Evaluate Option 2

Option 2 claims that glucocorticoids increase progesterone levels for pregnancy continuation. However, glucocorticoids are not specifically used to regulate progesterone; therefore, this option is not the expected effect.

Step 4: Evaluate Option 3

Option 3 proposes that glucocorticoids reduce inflammation and infection. While they do have anti-inflammatory properties, the primary purpose in this context is not related to infection control, making this option incorrect as the expected effect.

Step 5: Evaluate Option 4

Option 4 states that glucocorticoids accelerate fetal lung maturation. This is the correct choice as glucocorticoids like betamethasone are administered to enhance the production of surfactant in fetal lungs, thereby accelerating lung maturation.

Key Concepts

Fetal Lung Maturation

Fetal lung maturation is a crucial process during a baby's development in the womb. It involves the growth and development of the lungs to ensure the newborn can breathe independently after birth. One significant aspect of this maturation is the production of a substance called surfactant.
Surfactant reduces surface tension in the alveoli, the tiniest air sacs in the lungs. By lowering surface tension, surfactant prevents the alveoli from collapsing and allows for easier breathing. Its production usually ramps up in the later stages of pregnancy, but if a baby is at risk of preterm birth, there might not be enough surfactant for the baby to breathe effectively.
This is where medical interventions become vital. Administering treatments that promote surfactant production can help enhance the baby's lung capacity, making the transition from the womb to the outside world smoother and safer.

Betamethasone Function

Betamethasone is a type of glucocorticoid steroid primarily used to accelerate fetal lung maturation in the event of preterm labor. Its primary function is to stimulate the increased production of surfactant, which is essential for fetal lung development.
When betamethasone is administered to the expecting mother, it crosses the placental barrier and directly affects the baby's lung tissue. This drug initiates several complex biochemical pathways, ultimately speeding up the creation of surfactant.
Key benefits of betamethasone include:

• Preparation of the fetal lungs for breathing.
• Reduction in the risk of respiratory distress syndrome (RDS).
• Helping with the maturation of other organs, providing the newborn with a better chance of survival when born preterm.

This makes betamethasone an invaluable tool for obstetricians when anticipating an early delivery.

Preterm Labor Treatments

Preterm labor occurs when a woman starts experiencing contractions that open the cervix after the 20th and before the 37th week of pregnancy. Interventions aim to delay labor and enhance fetal development.
Main treatments include:

• Tocolytics: Medications that help slow down or halt labor contractions temporarily, providing more time for fetal development or for other treatments to work.
• Glucocorticoids: Hormones like betamethasone accelerate the development of fetal organs, especially the lungs, reducing complications associated with premature birth.
• Antibiotics: Given to prevent or treat infections that may trigger preterm labor or affect fetal health.

Each treatment addresses different aspects of preterm birth, aiming to improve outcomes. They are part of a comprehensive strategy to manage and mitigate the risks associated with delivering a baby too early. Implementing these treatments can significantly improve neonatal health and survival rates.