A nurse is caring for a client who is 39 weeks gestation and having contractions.
Which of the following should the nurse recognize as a sign of true labor?
Uterine contractions that cause variable decelerations.
Regular uterine contractions that cause cervical change.
Station of the presenting part.
Rupture of the membranes resulting in uterine contractions.
The Correct Answer is B
Choice A rationale
Uterine contractions that cause variable decelerations are not specific to true labor. Variable decelerations are typically associated with umbilical cord compression and can occur during both true and false labor.
Choice B rationale
Regular uterine contractions that cause cervical change are a definitive sign of true labor. True labor is characterized by contractions that become progressively stronger, more frequent, and more regular, leading to cervical dilation and effacement. This process indicates that the body is preparing for childbirth.
Choice C rationale
The station of the presenting part refers to the position of the fetus in relation to the ischial spines of the pelvis. While it is an important aspect of labor progression, it is not a definitive sign of true labor.
Choice D rationale
Rupture of the membranes, or the breaking of the water, can occur before true labor begins. While it often indicates that labor is imminent, it is not a definitive sign of true labor on its own.
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Correct Answer is D
Explanation
Choice A rationale
Early decelerations are not caused by umbilical cord compression. Umbilical cord compression typically leads to variable decelerations, which have a different pattern and clinical significance.
Choice B rationale
Early decelerations are not caused by uteroplacental insufficiency. Uteroplacental insufficiency is associated with late decelerations, which occur after the peak of a contraction and indicate reduced blood flow to the fetus.
Choice C rationale
Early decelerations are not a result of the administration of medications. Medications can affect fetal heart rate patterns, but early decelerations are specifically related to fetal head compression.
Choice D rationale
Early decelerations are related to fetal head compression. They occur as the fetal head descends into the maternal pelvis and are generally considered benign, indicating normal labor progression.
Correct Answer is B
Explanation
Choice A rationale
Magnetic Resonance Imaging (MRI) is a non-invasive imaging technique that provides detailed images of the fetus and placenta. However, it is not typically used as the first-line test for assessing placental perfusion and IUGR. Doppler flow studies are more specific for evaluating blood flow and detecting issues related to placental insufficiency.
Choice B rationale
Doppler flow studies are non-invasive tests that assess blood flow in the umbilical artery and other fetal vessels. These studies are particularly useful in evaluating placental perfusion and identifying intrauterine growth restriction (IUGR). Abnormal Doppler flow patterns can indicate compromised blood flow to the fetus, which is a concern in cases of minimal fetal growth.
Choice C rationale
Amniocentesis is an invasive procedure that involves extracting a sample of amniotic fluid for genetic testing and assessment of fetal lung maturity. It is not used for evaluating placental perfusion or IUGR7.
Choice D rationale
Chorionic villus sampling (CVS) is an invasive procedure used for early genetic testing by sampling placental tissue. It is not used for assessing placental perfusion or IUGR7.