A nurse is caring for a preterm newborn who is in an incubator to maintain a neutral thermal environment. The father of the newborn asks the nurse why this is necessary.
Which of the following responses should the nurse make?
“Preterm newborns have a smaller body surface area than normal newborns”
“Preterm newborns lack adequate temperature control mechanisms”
“The heat in the incubator rapidly dries the sweat of preterm newborns”
“The added brown fat layer in preterm newborn reduces his ability to generate heat” .
The Correct Answer is B
Choice A rationale
While it is true that preterm newborns have a smaller body surface area than full-term newborns, this is not the primary reason for using an incubator. A smaller body surface area can contribute to heat loss, but the main issue is the lack of adequate temperature control mechanisms.
Choice B rationale
Preterm newborns lack the adequate temperature control mechanisms that full-term newborns have. They have less subcutaneous fat to insulate them and a higher surface area to volume ratio, which increases heat loss. They also lack the ability to shiver to generate heat.
Therefore, an incubator is used to maintain a neutral thermal environment.
Choice C rationale
The heat in the incubator does not rapidly dry the sweat of preterm newborns. In fact, preterm newborns do not sweat as efficiently as full-term newborns or adults, so they are less likely to lose heat through sweating.
Choice D rationale
The statement that the added brown fat layer in preterm newborn reduces his ability to generate heat is incorrect. In fact, preterm newborns have less brown fat than full-term newborns. Brown fat is a type of fat that generates heat when metabolized, and it is an important source of heat for newborns.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale
Hypotension, or low blood pressure, is a common complication from an epidural block16. This occurs because the medication used in the epidural can block sympathetic nerve fibers, which can cause blood vessels to dilate and lead to a drop in blood pressure16.
Choice B rationale
Vomiting is not typically a direct complication of an epidural block16. Nausea and vomiting during labor can have many causes, including the physical process of labor, pain, and medications.
Choice C rationale
Tachycardia, or a fast heart rate, is not typically a complication of an epidural block16. In fact, some of the medications used in an epidural can actually cause a slower heart rate.
Choice D rationale
While severe respiratory depression can occur with an epidural, it is extremely rare16. More commonly, an epidural can cause a feeling of breathlessness or difficulty taking a deep breath, but it should not cause significant respiratory depression.
Correct Answer is D
Explanation
Choice A rationale
Gravida 4 Para 3 at 33 weeks of gestation is not an alarming finding. It simply indicates that the woman is pregnant for the fourth time and has had three previous deliveries. This is a normal part of the woman’s obstetric history and does not need to be reported to the provider.
Choice B rationale
Allergies, such as a sulfa allergy, are important to note in the patient’s medical history. However, unless the patient is being prescribed a medication that she is allergic to, this information does not need to be urgently reported to the provider.
Choice C rationale
A height of 165 cm (66 in), weight of 82 kg (180 lb), and BMI of 30.6 are all within normal ranges for a pregnant woman. These measurements are part of routine prenatal care and do not need to be urgently reported to the provider.
Choice D rationale
A weight gain of 32 kg (7 lb) over the last 2 weeks is concerning. Rapid weight gain can be a sign of preeclampsia, a serious pregnancy complication characterized by high blood pressure. This should be reported to the provider immediately.
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