What is the result of hypothermia in the newborn?
Decreased metabolic rate
Decreased oxygen demands
Shivering to generate heat
Increased glucose demands
The Correct Answer is D
Choice A) Decreased metabolic rate is incorrect because this is not a result of hypothermia in the newborn, but rather a cause of it. Metabolic rate is the speed at which the body uses energy to perform its functions. Newborns have a high metabolic rate, which helps them to maintain a normal body temperature of 36.5°C to 37.5°C (97.7°F to 99.5°F). However, some factors can lower the metabolic rate of newborns, such as prematurity, low birth weight, infection, or hypoglycemia. A low metabolic rate can make the newborn more susceptible to heat loss and hypothermia, which is a condition that occurs when the body temperature drops below 36°C (96.8°F). Therefore, this response is inaccurate and misleading.
Choice B) Decreased oxygen demands is incorrect because this is not a result of hypothermia in the newborn, but rather a consequence of it. Oxygen demand is the amount of oxygen that the body needs to function properly.
Newborns have a high oxygen demand, which helps them to support their growth and development. However, some factors can decrease the oxygen demand of newborns, such as hypothermia, sedation, or asphyxia. A low oxygen demand can impair the oxygen delivery and utilization by the tissues and organs, leading to hypoxia, acidosis, or organ failure. Therefore, this response is irrelevant and inaccurate.
Choice C) Shivering to generate heat is incorrect because this is not a result of hypothermia in the newborn, but rather a mechanism that is absent in them. Shivering is an involuntary contraction of the muscles that produces heat and raises the body temperature. It is a common response to cold exposure in adults and older children, but not in newborns. Newborns do not have the ability to shiver, as their muscles are immature and lack glycogen stores.
Instead, they rely on other methods to generate heat, such as non-shivering thermogenesis, which involves burning brown fat in certain areas of the body. Therefore, this response is irrelevant and inaccurate.
Choice D) Increased glucose demands is correct because this is a result of hypothermia in the newborn that can cause complications. Glucose demand is the amount of glucose that the body needs to produce energy and maintain its functions. Newborns have a high glucose demand, which helps them to support their metabolic rate and thermoregulation. However, some factors can increase the glucose demand of newborns, such as hypothermia, stress, or infection. A high glucose demand can deplete the glucose stores and cause hypoglycemia, which is a low level of glucose in the blood that can lead to seizures, brain damage, or death. Therefore, this response is clear and accurate.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A) Monitor uterine contractions is incorrect because this is not the most urgent intervention for a pregnant woman who has experienced a bleeding episode in late pregnancy. Uterine contractions can indicate labor or placental abruption, which are possible causes of bleeding in late pregnancy. However, they are not the only or the most reliable indicators of these conditions, as some women may have painless bleeding or contractions without bleeding. Moreover, monitoring uterine contractions does not address the immediate needs of the mother and the fetus, such as oxygenation, circulation, and perfusion. Therefore, this intervention should be done after assessing and stabilizing the vital signs and FHR.
Choice B) Assess fetal heart rate (FHR) and maternal vital signs is correct because this is the most important and essential intervention for a pregnant woman who has experienced a bleeding episode in late pregnancy. Bleeding in late pregnancy can be caused by various conditions, such as placenta previa, placental abruption, uterine rupture, or vasa previa, which can compromise the blood supply and oxygen delivery to the mother and the fetus. Assessing FHR and maternal vital signs can help to determine the severity and cause of the bleeding, as well as guide further
interventions such as fluid resuscitation, oxygen therapy, blood transfusion, or emergency delivery. The normal FHR range for a fetus is 110 to 160 beats per minute, and it may vary with fetal activity or maternal position. The normal maternal vital signs are: blood pressure 120/80 mm Hg or lower, heart rate 60 to 100 beats per minute, respiratory rate 12 to 20 breaths per minute, and temperature 36.5°C to 37.5°C (97.7°F to 99.5°F). Any deviation from these ranges may indicate hypoxia, hypovolemia, shock, infection, or distress. Therefore, this intervention should be done as soon as possible for women who have bleeding in late pregnancy.
Choice c) Perform a venipuncture for hemoglobin and hematocrit levels is incorrect because this is not a priority intervention for a pregnant woman who has experienced a bleeding episode in late pregnancy. Hemoglobin and hematocrit are blood tests that measure the amount of red blood cells and their percentage in the blood volume.
They can help to evaluate the extent of blood loss and the need for blood transfusion. However, they are not
immediate or accurate indicators of bleeding in late pregnancy, as they may take time to reflect the changes in blood volume or be affected by other factors such as hydration or hemodilution. Moreover, performing a venipuncture does not address the immediate needs of the mother and the fetus, such as oxygenation, circulation, and perfusion.
Therefore, this intervention should be done after assessing and stabilizing the vital signs and FHR.
Choice d) Place clean disposable pads to collect any drainage is incorrect because this is not a priority intervention for a pregnant woman who has experienced a bleeding episode in late pregnancy. Placing clean disposable pads can help to keep the perineal area clean and dry, as well as to estimate the amount and type of bleeding. However, it does not address the immediate needs of the mother and the fetus, such as oxygenation, circulation, and perfusion. Moreover, it does not provide any information about the cause or severity of the bleeding, as it may be affected by factors such as gravity or pooling. Therefore, this intervention should be done after assessing and stabilizing the vital signs and FHR.
Correct Answer is D
Explanation
Choice A) Increase oral intake of water between feedings is incorrect because this is not a helpful or recommended measure to help reduce the bilirubin in a newborn who is receiving phototherapy. Bilirubin is a yellow pigment that is produced when red blood cells are broken down. It is normally excreted by the liver into bile and then eliminated by the intestines. However, some newborns have high levels of bilirubin in their blood, which can cause jaundice, a condition that makes the skin and eyes look yellow. Phototherapy is a treatment that uses blue light to help break down the bilirubin and make it easier for the liver to process. Increasing oral intake of water between feedings does not have any effect on the bilirubin level, as water does not contain any nutrients or calories that can stimulate the liver or bowel function. Moreover, giving water to a newborn can cause hyponatremia, which is a low level of sodium in the blood that can lead to seizures, brain damage, or death. Therefore, this measure should be avoided or used with caution for newborns who are receiving phototherapy.
Choice B) Wrap the infant in triple blankets to prevent cold stress during phototherapy is incorrect because this is not a safe or appropriate measure to help reduce the bilirubin in a newborn who is receiving phototherapy. Cold stress is a condition that occurs when a newborn loses too much heat and has difficulty maintaining a normal body temperature. It can cause complications such as hypoglycemia, hypoxia, acidosis, or bleeding. Wrapping the infant in triple blankets may seem like a good way to prevent cold stress, but it can actually cause overheating, dehydration, or hyperthermia, which are equally dangerous for the newborn. Moreover, wrapping the infant in blankets can reduce the effectiveness of phototherapy, as it blocks the exposure of the skin to the blue light. Therefore, this measure should be avoided or used with caution for newborns who are receiving phototherapy.
Choice C) How to prepare the newborn for an exchange transfusion is incorrect because this is not a relevant or necessary measure to help reduce the bilirubin in a newborn who is receiving phototherapy. An exchange transfusion is a procedure that involves replacing some of the newborn's blood with donor blood to lower the bilirubin level and prevent brain damage. It is usually reserved for severe cases of jaundice that do not respond to phototherapy or other treatments. Preparing the newborn for an exchange transfusion involves obtaining informed consent from the parents, placing an umbilical venous catheter, monitoring vital signs and blood tests, and administering medications and fluids. However, these steps are not part of routine care for newborns who are receiving phototherapy, and they do not help to reduce the bilirubin level by themselves. Therefore, this measure should be done only when indicated by the physician and explained by the nurse.
Choice D) Increase the frequency of feedings is correct because this is an effective and recommended measure to help reduce the bilirubin in a newborn who is receiving phototherapy. Feeding provides nutrients and calories that can stimulate the liver and bowel function, which are essential for processing and eliminating bilirubin from the body. Feeding also helps to prevent dehydration, which can worsen jaundice and increase the risk of complications.
Feeding can be done by breast milk or formula, depending on the mother's preference and availability. The frequency of feedings should be increased to at least every 2 to 3 hours or on demand, as long as the newborn shows signs of hunger and satisfaction. Therefore, this measure should be encouraged and supported by the nurse for newborns who are receiving phototherapy.
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