The nurse is performing a newborn physical assessment and is about to elicit the Moro reflex. Which of the following responses should the nurse expect to see?
Select one:
The cheek of the newborn is touched, and the newborn turns toward the side that was touched.
The newborn is suddenly lowered or startled, and they extend their arms, legs and neck, then rapidly bring their arms together.
The newborn is supine and their head is turned to one side, then the arm on that same side extends.
The lateral aspect of the sole of the newborn's foot is stroked, and the toes extend and fan outward.
The Correct Answer is B
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A Reason: Macrosomic fetus is a fetus that weighs more than 4000 grams or 8 pounds 13 ounces at birth. It is not a common complication of teenage pregnancy, but rather of maternal diabetes, obesity, or a history of large babies.
Choice B Reason: Preeclampsia is a condition characterized by high blood pressure and proteinuria in pregnancy. It can cause serious complications for both the mother and the baby, such as seizures, organ damage, growth restriction, and placental abruption. Teenage pregnancy is a risk factor for preeclampsia, especially if the mother is younger than 15 years old.
Choice C Reason: Inadequate nutritional status of mother is a condition where the mother does not consume enough calories, protein, vitamins, minerals, or fluids during pregnancy. It can affect the growth and development of the baby and increase the risk of low birth weight, preterm birth, and birth defects. Teenage pregnancy is a risk factor for inadequate nutritional status of mother, as teenagers may have poor dietary habits, eating disorders, or limited access to food.
Choice D Reason: Cephalopelvic disproportion is a condition where the size or shape of the baby's head or body is too large to fit through the mother's pelvis. It can prevent normal vaginal delivery and require cesarean section. Teenage pregnancy is a risk factor for cephalopelvic disproportion, as teenagers may have smaller or immature pelvises that are not fully developed.
Correct Answer is D
Explanation
Choice A Reason: Retained placental fragments. This is an incorrect answer that refers to a different cause of late postpartum hemorrhage, which is less common than uterine atony. Retained placental fragments are pieces of placenta that remain atached to the uterine wall after delivery, which prevent uterine contraction and involution, and provide a source of bleeding and infection. Retained placental fragments can be caused by abnormal placentation (such as placenta accreta), manual removal of placenta, or incomplete separation of placenta.
Choice B Reason: Cervical or vaginal lacerations. This is an incorrect answer that refers to a different cause of late postpartum hemorrhage, which is more likely to cause early postpartum hemorrhage than late postpartum hemorrhage. Cervical or vaginal lacerations are tears or cuts in the cervix or vagina that occur during delivery, which can cause bleeding from the damaged blood vessels. Cervical or vaginal lacerations can be caused by rapid or instrumental delivery, large or malpositioned fetus, or episiotomy.
Choice C Reason: Uterine inversion. This is an incorrect answer that refers to a different cause of late postpartum hemorrhage, which is rare and life-threatening. Uterine inversion is a condition where the uterus turns inside out and protrudes through the cervix and vagina after delivery, which can cause massive bleeding and shock. Uterine inversion can be caused by excessive traction on the umbilical cord, fundal pressure, or uterine relaxation.
Choice D Reason: Uterine atony. This is because uterine atony is a condition where the uterus fails to contract and retract after delivery, which leads to bleeding from the placental site. Uterine atony is the most common cause of late postpartum hemorrhage, accounting for about 75% of cases. Late postpartum hemorrhage is excessive bleeding from the uterus or genital tract that occurs more than 24 hours but less than 12 weeks after delivery. Late postpartum hemorrhage can be caused by retained placental fragments, subinvolution of the uterus, infection, or coagulation disorders.
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