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A comprehensive set of multiple-choice questions and answers related to the physiologic and behavioral adaptations of newborns. each question tests understanding of key concepts in neonatal care, such as thermoregulation, respiratory function, and reflexes. detailed rationales are provided for each answer, enhancing learning and comprehension of important clinical considerations.
Typology: Exams
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a. 80 to 100 beats/min. b. 100 to 120 beats/min. c. 120 to 160 beats/min. d. 150 to 180 beats/min. ANS: C The average infant heart rate while awake is 120 to 160 beats/min. The newborn's heart rate may be about 85 to 100 beats/min while sleeping. The infant's heart rate typically is a bit higher when alert but quiet. A heart rate of 150 to 180 beats/min is typical when the infant cries.
Erythema toxicum (or erythema neonatorum) is a newborn rash that resembles flea bites. This is a normal finding that does not require notification of the physician, isolation of the newborn, or any additional interventions.
b. heart murmurs heard after the first few hours are cause for concern. c. the point of maximal impulse (PMI) often is visible on the chest wall. d. persistent bradycardia may indicate respiratory distress syndrome (RDS). ANS: C The newborn's thin chest wall often allows the PMI to be seen. The normal heart rate for infants who are not sleeping is 120 to 160 beats/min. However, a crying infant temporarily could have a heart rate of 180 beats/min. Heart murmurs during the first few days of life have no pathologic significance; an irregular heart rate past the first few hours should be evaluated further. Persistent tachycardia may indicate RDS; bradycardia may be a sign of congenital heart blockage.
c. "Brick dust" or blood on a diaper is always a cause to notify the physician. d. weight loss from fluid loss and other normal factors should be made up in 4 to 7 days. ANS: A A newborn who has not voided in 24 hours may have any of a number of problems, some of which deserve the attention of the pediatrician. Formula-fed infants tend to void more frequently in the first 3 days; breastfed infants void less during this time because the mother's breast milk has not come in yet. Brick dust may be uric acid crystals; blood spotting could be caused by withdrawal of maternal hormones (pseudomenstruation) or a circumcision. The physician must be notified only if there is no apparent cause of bleeding. Weight loss from fluid loss may take 14 days to regain.
negative intrathoracic pressure that encourages air to flow into the lungs. The profound change in temperature between intrauterine and extrauterine life stimulates receptors in the skin to communicate with the receptors in the medulla. This also contributes to the initiation of breathing.
c. the infant's blood glucose level is 45 mg/dL. d. the infant goes into a deep sleep at age 1 hour. ANS: A An infant who is dusky and becomes cyanotic when crying is showing poor adaptation to extrauterine life. Acrocyanosis is an expected finding during the early neonatal life. This is within normal range for a newborn. Infants enter the period of deep sleep when they are about 1 hour old.
first stool of the newborn and is made up of matter remaining in the intestines during intrauterine life. Meconium is dark and sticky.