A nurse is reinforcing teaching with a 36-year-old client who is at 16 weeks of gestation and is scheduled for an amniocentesis. The nurse should include in the teaching that an amniocentesis is performed to identify which of the following findings?
Chromosomal abnormalities
Placental circulation
Rh incompatibility
Fetal breathing movements
The Correct Answer is A
Rationale:
A. Chromosomal abnormalities: Amniocentesis involves analyzing amniotic fluid to detect genetic and chromosomal disorders such as Down syndrome, trisomy 18, and neural tube defects. It is typically performed between 15 and 20 weeks gestation for diagnostic accuracy during this stage of fetal development.
B. Placental circulation: Assessment of placental blood flow and circulation is usually done via Doppler ultrasound, not amniocentesis. Amniocentesis does not evaluate the vascular function or perfusion status of the placenta.
C. Rh incompatibility: While amniocentesis may reveal fetal anemia due to Rh sensitization in rare cases, it is not the primary test used for diagnosing Rh incompatibility. Blood antibody screening and Doppler assessment of the middle cerebral artery are preferred for Rh-related concerns.
D. Fetal breathing movements: Fetal breathing is assessed through a biophysical profile or real-time ultrasound, not via amniotic fluid sampling. Amniocentesis does not provide information about the fetus’s respiratory activity or movement patterns.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["1.5"]
Explanation
Calculation:
Desired dose = 60 mg.
Available concentration = 50 mg/1.25 mL.
- Calculate the volume in milliliters (mL) to administer.
Volume (mL) = Desired dose (mg) / (Available concentration (mg) / Available volume (mL))
= 60 mg / (50 mg / 1.25 mL)
= 60 mg / 40 mg/mL
= 1.5 mL.
Correct Answer is C
Explanation
Rationale:
A. “I will wait 15 minutes before taking a second tablet.": Waiting 15 minutes delays relief and increases the risk of complications. The client should take a second tablet if chest pain is unrelieved after 5 minutes, up to three doses within 15 minutes, then seek emergency help if symptoms persist.
B. "I should stop taking the medication if I get a headache.": Stopping the medication due to a headache overlooks the therapeutic benefit. Headaches are a common side effect caused by vasodilation and can be managed with mild analgesics while continuing the medication as prescribed.
C. "I should expect pain relief in 1 to 3 minutes.": Sublingual nitroglycerin is rapidly absorbed through the oral mucosa, leading to relief typically within 1 to 3 minutes. This fast onset is essential for treating acute angina episodes effectively.
D. "I will swallow the tablet for faster absorption.": Swallowing the tablet bypasses the sublingual route, delaying its effect due to first-pass metabolism in the liver. The tablet must be placed under the tongue to ensure rapid absorption and therapeutic effectiveness.
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