Author Question: Labor is very stressful for the fetus. It is important for the intrapartum nurse to be knowledgeable ... (Read 79 times)

lracut11 · **on:** Jun 27, 2018

Labor is very stressful for the fetus. It is important for the intrapartum nurse to be knowledgeable regarding the mechanisms that regulate the fetal heart rate and keep the brain well oxygenated.

When evaluating the patient's progress, the nurse knows that four of the five fetal factors that interact to regulate the heart rate are the a. Uterine activity
b. Autonomic nervous system
c. Baroreceptors
d. Chemoreceptors
e. Adrenal glands

Question 2

The baseline fetal heart rate (FHR) is the average rate during a 10-minute segment. Changes in FHR are categorized as periodic or episodic. These patterns include both accelerations and decelerations.

The labor nurse is evaluating the patient's most recent 10-minute segment on the monitor strip and notes a late deceleration. This is likely to be caused by which physiologic alteration? Select all that apply. a. Spontaneous fetal movement
b. Compression of the fetal head
c. Placental abruption
d. Cord around the baby's neck
e. Maternal supine hypotension

ndhahbi · **Reply #1 on:** Jun 27, 2018

Answer to Question 1

B, C, D, E
Feedback
Correct The sympathetic and parasympathetic branches of the autonomic nervous
system are balanced forces that regulate FHR. Sympathetic stimulation
increases the heart rate, while parasympathetic responses, through
stimulation of the vagus nerve, reduce the FHR and maintain variability.
The baroreceptors stimulate the vagus nerve to slow the FHR and decrease
the blood pressure. These are located in the carotid arch and major arteries.
The chemoreceptors are cells that respond to changes in oxygen, carbon
dioxide, and pH. They are found in the medulla oblongata and the aortic
and carotid bodies. The adrenal medulla secretes epinephrine and
norepinephrine in response to stress, causing an acceleration in FHR.
Incorrect Hypertonic uterine activity can reduce the time available for exchange of
oxygen and waste products; however, this is a maternal factor. The fifth
fetal factor is the central nervous system. The fetal cerebral cortex causes
the heart rate to increase during fetal movement and decrease when the
fetus sleeps.

Answer to Question 2

Posted another one can you check that one too? Thanks.