The difference between physiological and nonphysiological jaundice is that nonphysiological jaundice

Choice A) dilates the bronchioles, decreasing airway resistance: This is not the correct function of surfactant.

Surfactant is a substance that reduces the surface tension of the fluid that lines the alveoli, which are the tiny air sacs in the lungs where gas exchange occurs. Surfactant does not affect the diameter of the bronchioles, which are the small airways that branch from the bronchi. Bronchodilation and bronchoconstriction are regulated by the autonomic nervous system and various mediators, such as histamine, epinephrine, and acetylcholine.

Choice B) provides transportation for oxygen to enter the blood supply: This is not the correct function of surfactant. Surfactant does not transport oxygen or any other gas. Oxygen diffuses from the alveoli into the capillaries, where it binds to hemoglobin in the red blood cells. The red blood cells then transport oxygen to the tissues via the blood circulation. Surfactant does not play a role in this process.

Choice C) keeps the alveoli open during expiration: This is the correct function of surfactant. Surfactant prevents the alveoli from collapsing during expiration by lowering the surface tension of the fluid that lines them. This allows for easier breathing and better gas exchange. Without enough surfactant, the alveoli tend to collapse and stick together, causing atelectasis, which is a condition where some or all of a lung collapses. Atelectasis can lead to hypoxia, respiratory distress, and infection.

Choice D) causes increased permeability of the alveoli: This is not the correct function of surfactant. Surfactant does not increase or decrease the permeability of the alveoli, which is the ability of substances to pass through them.

Permeability of the alveoli depends on several factors, such as pressure gradients, solubility, molecular size, and membrane thickness. Increased permeability of the alveoli can occur in conditions such as acute respiratory distress syndrome (ARDS), where fluid leaks into the alveolar space and impairs gas exchange. Surfactant does not cause this condition, but it can be affected by it.

Choice A) Report of absent breast pain is incorrect because this is not a finding that indicates that the medication was effective, but rather a finding that indicates that the client does not have mastitis or engorgement. Mastitis is an infection of the breast tissue that causes pain, swelling, redness, and fever. Engorgement is a condition where the breasts become overfilled with milk, causing pain, hardness, and leakage. Both conditions are common in postpartum women who are breastfeeding, but they are not related to methylergonovine or uterine bleeding. Therefore, this response is irrelevant and inaccurate.

Choice B) Increase in lochia is incorrect because this is not a finding that indicates that the medication was effective, but rather a finding that indicates that the medication was ineffective or that the client has a complication. Lochia is the vaginal discharge that consists of blood, mucus, and tissue from the uterus after childbirth. It usually lasts for about 4 to 6 weeks and gradually decreases in amount and color. Methylergonovine is a medication that helps to control uterine bleeding by improving the tone and contractions of the uterus. An increase in lochia may mean that methylergonovine did not work well or that the client has a problem such as retained placenta, infection, or subinvolution. Therefore, this response is opposite and inaccurate.

Choice C) Increase in blood pressure is incorrect because this is not a finding that indicates that the medication was effective, but rather a finding that indicates that the client has a side effect or a risk factor. Blood pressure is the force of blood against the walls of the arteries. It is measured by two numbers: systolic (the pressure when the heart beats) and diastolic (the pressure when the heart rests). The normal range for blood pressure is 120/80 mm Hg or lower. Methylergonovine is a medication that can cause vasoconstriction, which means narrowing of the blood vessels and increasing of the blood pressure. This can lead to complications such as hypertension, stroke, or heart attack. Therefore, this response is adverse and inaccurate.

Choice D) Fundus firm to palpation is correct because this is a finding that indicates that the medication was effective and that the client has a good outcome. The fundus is the upper part of the uterus that can be felt through the abdomen after childbirth. It should be firm, midline, and at or below the level of the navel. A firm fundus means that the uterus has contracted well and stopped bleeding. Methylergonovine is a medication that helps to achieve this by improving the tone and contractions of the uterus. Therefore, this response is positive and accurate.