A nurse is discussing newborn metabolic screening with parents who state, "Our baby looks perfectly healthy.
Why does she need this?" What is the best response?
Some genetic disorders are not visible at birth but can cause serious problems if untreated.
This is to test the newborn's jaundice level at 24 hours of life so we can treat hyperbilirubinemia if your newborn develops it.
The metabolic screening is primarily used for state research purposes and is voluntary.
The test ensures your baby's immune system is developing normally.
The Correct Answer is A
Choice A rationale
The newborn metabolic screening (often called the heel stick test or tandem mass spectrometry) checks for dozens of inborn errors of metabolism and other genetic disorders, such as Phenylketonuria (PKU), congenital hypothyroidism, and Sickle Cell Disease. These are often asymptomatic at birth but cause severe, irreversible intellectual disability, organ damage, or death if not detected and treated early, often with simple dietary or hormonal interventions.
Choice B rationale
The newborn metabolic screening is distinct from a bilirubin test, which is performed to assess the risk of jaundice (hyperbilirubinemia). While bilirubin levels are often checked in the first 24-48 hours, the metabolic screen is a separate test that detects disorders caused by enzyme deficiencies or abnormal protein production, not bilirubin accumulation.
Choice C rationale
While data from screening programs contributes to public health research, the primary and mandatory purpose of newborn metabolic screening is clinical—to identify babies who have serious, preventable conditions. State laws mandate these screenings for the direct health benefit of the individual newborn, making participation non-voluntary in most places.
Choice D rationale
The metabolic screening tests for genetic and metabolic conditions, and endocrine disorders (like congenital hypothyroidism), but it is not a primary or direct test for the normal development of the newborn's immune system. Disorders specifically affecting the immune system, such as Severe Combined Immunodeficiency (SCID), are sometimes included in the expanded panels, but the test's scope is much broader.
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Related Questions
Correct Answer is D
Explanation
Choice A rationale
Primigravida (first pregnancy) is not typically a primary risk factor for postpartum hemorrhage (PPH) itself, unlike multiparity or grand multiparity. A small baby is less likely to cause uterine overdistention and subsequent atony compared to a macrosomic infant. While operative delivery (e.g., C-section, forceps) carries risk, the combination is less critical than factors leading to uterine atony.
Choice B rationale
Premature birth, while potentially associated with an underdeveloped placenta or placental issues, is not a direct primary cause of postpartum hemorrhage. Infection (chorioamnionitis or endometritis) and a prolonged length of labor (causing uterine muscle fatigue) are recognized contributing factors that can lead to uterine atony, but are often secondary to the main causes.
Choice C rationale
Multiparity (multiple pregnancies and births) increases the risk of PPH due to repeated stretching and potentially reduced myometrial tone, predisposing to atony. Older maternal age (over 35) is a risk factor, possibly due to higher rates of underlying medical conditions or prolonged labor. Operative delivery also introduces trauma and potential placental issues.
Choice D rationale
Uterine atony (failure of the uterus to contract and compress blood vessels) is the most common cause of postpartum hemorrhage (PPH), accounting for about 80% of cases. Placenta previa increases the risk because the placenta's lower segment implantation may prevent effective contraction post-delivery. Operative procedures, especially Cesarean section, increase blood loss and potential for uterine trauma. —.
Correct Answer is D
Explanation
Choice A rationale
The uterus is generally no longer palpable abdominally by about 10 to 14 days postpartum, as it descends back into the true pelvis. Therefore, a non-palpable uterus by week 2 (14 days) is often a normal finding, not one that strongly suggests subinvolution, which is a slower-than-expected return to the non-pregnant state.
Choice B rationale
Lochia serosa (pinkish-brown discharge) typically appears around day 4 or 5 and may last until about the tenth day. Its presence on day 5 is within the expected timeline of normal involution. Subinvolution is often characterized by prolonged or excessive lochia (rubra or serosa) beyond the normal time frame.
Choice C rationale
The fundus is typically located 1-2 cm below the umbilicus by 24 hours postpartum and descends approximately 1 fingerbreadth (1 cm) per day. A fundus 2 cm below the umbilicus on day 3 is consistent with the expected rate of involution, suggesting a normal progression, not subinvolution.
Choice D rationale
The uterus is typically at or below the symphysis pubis and no longer palpable abdominally by day 10. A uterus palpable above the umbilicus on day 7 indicates that the rate of descent is slower than expected (it should be much lower), which is the hallmark sign of subinvolution. .
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