Before applying a cord clamp, the nurse assesses the umbilical cord for vessels. The nurse expects to find: Select one:
Two arteries, one vein.
Two veins, one artery.
Two veins, two arteries.
One artery, one vein.
The Correct Answer is A
Choice A Reason: Two arteries, one vein. This is because two arteries and one vein are the normal components of the umbilical cord, which is a structure that connects the fetus to the placenta and provides blood circulation between them. The umbilical cord carries oxygenated blood from the placenta to the fetus through the umbilical vein, and deoxygenated blood from the fetus to the placenta through the umbilical arteries.
Choice B Reason: Two veins, one artery. This is an incorrect answer that indicates an abnormal anatomy of the umbilical cord, which is known as single umbilical artery (SUA). SUA is a condition where there is only one umbilical artery instead of two, which can reduce blood flow and oxygen delivery to the fetus. SUA can be associated with congenital anomalies or growth restriction in some cases.
Choice C Reason: Two veins, two arteries. This is an incorrect answer that indicates an abnormal anatomy of the umbilical cord, which is known as double umbilical vein (DUV). DUV is a condition where there are two umbilical veins instead of one, which can increase blood flow and oxygen delivery to the fetus. DUV can be associated with fetal overgrowth or polycythemia in some cases.
Choice D Reason: One artery, one vein. This is an incorrect answer that indicates an abnormal anatomy of the umbilical cord, which is also known as single umbilical artery (SUA). SUA is a condition where there is only one umbilical artery instead of two, which can reduce blood flow and oxygen delivery to the fetus. SUA can be associated with congenital anomalies or growth restriction in some cases.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A Reason: Central cyanosis and poor tone. These are signs of hypoxia and asphyxia in newborns, which indicate a need for resuscitation. Central cyanosis means bluish discoloration of the skin or mucous membranes around the mouth, nose, or eyes. Poor tone means limpness or lack of muscle activity.
Choice B Reason: Heart rate of 160 beats per minute and spitting up mucus. These are not signs of hypoxia or asphyxia in newborns, but rather normal findings or minor issues. A normal heart rate for a newborn ranges from 120 to 160 beats per minute. Spitting up mucus may be due to excess secretions or swallowing amniotic fluid, which can be cleared by suctioning or burping.
Choice C Reason: Crying with respirations of greater than 60 breaths per minute. These are not signs of hypoxia or asphyxia in newborns, but rather normal or expected findings. Crying indicates that the newborn has a patent airway and adequate lung expansion. Respirations of greater than 60 breaths per minute may be normal for a newborn in transition or due to transient tachypnea, which usually resolves within a few hours.
Choice D Reason: Blue hands and feet but lips that are slowly pinking up. These are not signs of hypoxia or asphyxia in newborns, but rather a common condition called acrocyanosis. Acrocyanosis means bluish discoloration of the hands and feet due to poor peripheral circulation in response to cold exposure or stress. It does not affect oxygenation or ventilation and usually disappears within 24 to 48 hours after birth.
Correct Answer is B
Explanation
Choice A Reason: The cheek of the newborn is touched, and the newborn turns toward the side that was touched. This is an incorrect answer that describes a different reflex called the rooting reflex. The rooting reflex is a feeding reflex that helps the newborn locate the nipple and initiate sucking. The rooting reflex is elicited by stroking the cheek or corner of the mouth of the newborn, which causes them to turn their head and open their mouth toward the stimulus.
Choice B Reason: The newborn is suddenly lowered or startled, and they extend their arms, legs and neck, then rapidly bring their arms together. This is because this response describes the Moro reflex, which is a primitive reflex that is present at birth and disappears by 3 to 6 months of age. The Moro reflex is elicited by simulating a falling sensation or a loud noise, which triggers a fear response in the newborn. The Moro reflex consists of four phases: extension, abduction, adduction, and crying.
Choice C Reason: The newborn is supine and their head is turned to one side, then the arm on that same side extends. This is an incorrect answer that refers to another reflex called the tonic neck reflex. The tonic neck reflex is a postural reflex that helps prepare the newborn for voluntary reaching. The tonic neck reflex is elicited by placing the newborn in a supine position and turning their head to one side, which causes them to assume a "fencing" posture with one arm extended and one arm flexed.
Choice D Reason: The lateral aspect of the sole of the newborn's foot is stroked, and the toes extend and fan outward. This is an incorrect answer that indicates a different reflex called the Babinski reflex. The Babinski reflex is a neurological reflex that tests for spinal cord integrity. The Babinski reflex is elicited by stroking the lateral aspect of the sole of the foot from heel to toe, which causes the big toe to dorsiflex and the other toes to fan out.
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