To prevent heat loss from convection in a newborn, which action by the nurse is best?

Choice A reason:

Basal metabolic rate reduction. This is incorrect because a newborn under a radiant heat warmer will have an increased basal metabolic rate, not a reduced one. The basal metabolic rate is the amount of energy the body uses at rest, and it is influenced by temperature. A warmer environment will stimulate the newborn's metabolism and increase the energy expenditure. • Choice B reason:

Brown fat production. This is incorrect because a newborn under a radiant heat warmer will have less need for brown fat production, not more. Brown fat is a type of fat tissue that generates heat by burning calories. It is found in newborns and helps them maintain their body temperature in cold environments. A warmer environment will reduce the need for brown fat activation. • Choice C reason:

Shivering. This is incorrect because a newborn under a radiant heat warmer will not shiver, but shivering is not the main mechanism of heat production in newborns. Shivering is an involuntary contraction of muscles that generates heat by increasing metabolism. Newborns have limited ability to shiver because of their immature nervous system and low muscle mass. They rely more on brown fat and increased metabolic rate to produce heat. • Choice D reason:

Cold stress. This is correct because a newborn under a radiant heat warmer will prevent cold stress, which is a condition where the newborn's body temperature drops below normal and causes adverse effects. Cold stress can impair oxygen delivery, increase acidosis, decrease blood glucose, and increase the risk of infection and bleeding. A radiant heat warmer provides a neutral thermal environment for the newborn and prevents heat loss by radiation.

: 1 : 2 : 3 : 4.

Choice A reason:

Babinski's Reflex is the normal response in infants when the sole of the foot is stroked from the heel to the ball of the foot. The big toe moves upward or toward the top surface of the foot, and the other toes fan out. This reflex is normal in children up to 2 years old, and it disappears as the nervous system matures. It may indicate damage to the central nervous system in older children and adults.

Choice B reason:

Stepping Reflex is the normal response in infants when they are held upright with their feet touching a flat surface. They will lift one foot and then the other, as if they are walking. This reflex is present at birth and lasts for about 2 months. It helps prepare the infant for voluntary walking.

Choice C reason:

Moro Reflex is the normal response in infants when they are startled by a loud noise or a sudden movement. They will extend their arms and legs, open their hands, and then curl up and bring their arms together as if they are hugging themselves. This reflex is present at birth and lasts for about 4 to 6 months. It is thought to be a protective response that helps the infant cling to their caregiver.

Choice D reason:

Plantar Grasp Reflex is the normal response in infants when pressure is applied to the sole of the foot near the toes. The toes will curl down and grasp the stimulus. This reflex is present at birth and lasts for about 9 to 12 months. It is similar to the palmar grasp reflex in the hands, and it helps develop the muscles and nerves in the feet. Some additional sentences are:. If you are interested in learning more about infant development, you can check out some of these links:. • [A guide to newborn reflexes]. • [A video demonstration of newborn reflexes].