A nurse in the newborn nursery is caring for an infant who has trisomy 21. When collecting data, which of the following findings should the nurse expect?
A single crease in the palm.
A notch in the lip.
An inversion of the foot.
Extra digits on the hand.
The Correct Answer is A
Choice A rationale
A single crease in the palm, known as a simian crease, is a common characteristic seen in infants with trisomy 21 (Down syndrome) due to the unique hand structure associated with this condition.
Choice B rationale
A notch in the lip, such as a cleft lip, is not commonly associated with trisomy 21 and is more typically related to other genetic conditions or environmental factors during development.
Choice C rationale
An inversion of the foot, such as clubfoot, is not a specific characteristic of trisomy 21. This condition is more often seen in other congenital anomalies not related to Down syndrome.
Choice D rationale
Extra digits on the hand, or polydactyly, is not commonly associated with trisomy 21 but can be seen in other genetic disorders. Trisomy 21 has more specific physical features like the simian crease.
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Correct Answer is B
Explanation
Choice A rationale
Using a disposable razor for shaving while taking warfarin can increase the risk of cuts and bleeding, which should be avoided due to the anticoagulant effects of warfarin.
Choice B rationale
Oral contraceptives should not be taken while on warfarin because they can increase the risk of blood clots, counteracting the effect of the anticoagulant.
Choice C rationale
Stopping warfarin in 2 weeks is incorrect advice, as the duration of therapy varies depending on the condition being treated and the individual's response to the medication.
Choice D rationale
Taking 650 milligrams of aspirin for leg discomfort is not advised while on warfarin, as aspirin can increase the risk of bleeding by affecting platelet function and the blood clotting process.
Correct Answer is A
Explanation
Choice A rationale
Amniocentesis is used to detect fetal genetic abnormalities, such as Down syndrome, by analyzing the amniotic fluid for genetic markers.
Choice B rationale
An empty bladder is required for the test only in late pregnancy to prevent bladder injury; however, in early pregnancy, a full bladder may be required to better visualize the uterus and amniotic fluid.
Choice C rationale
An x-ray is not typically used during the needle placement for amniocentesis. Ultrasound is the preferred method to guide the needle to avoid harm to the fetus and mother.
Choice D rationale
The test does not determine the volume of amniotic fluid; it is used primarily for genetic analysis, assessing fetal lung maturity, and diagnosing certain fetal infections.