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.

Choice A rationale

Applying cold compresses 20 minutes before each feeding may not be the most effective way to manage breast engorgement. Cold compresses can help to reduce swelling and relieve pain, but they do not address the underlying cause of engorgement, which is the accumulation of milk in the breasts.

Choice B rationale

Drinking herbal tea to reduce engorgement is not a proven method. While some herbs are believed to have galactagogue properties (increase milk production), they do not directly address breast engorgement. Furthermore, the safety and efficacy of many herbal remedies are not well-studied, and some may have side effects.

Choice C rationale

Letting the baby drain one breast at each feeding can help to alleviate engorgement, but it may not be sufficient if the feedings are spaced too far apart. The breasts continue to produce milk between feedings, and if the milk is not removed, engorgement can occur.

Choice D rationale

Feeding the baby every 2 hours can help to manage breast engorgement. Regular feedings help to ensure that the milk is being removed from the breasts, preventing the buildup that leads to engorgement.