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EXPLANATION
✔Correct answer:
Ultrasound. Ultrasound is the primary non-invasive diagnostic tool used to detect fetal anomalies between 18 and 40 weeks of gestation. Around 18-20 weeks, a detailed anatomy ultrasound scan is typically performed, where the healthcare provider examines fetal structures, including the brain, heart, spine, limbs, and other organs, to identify any abnormalities. Ultrasound can provide real-time imaging, allowing for the assessment of fetal growth, development, amniotic fluid levels, and placental location, which are all crucial for monitoring the health and development of the fetus. This test is safe for both the mother and fetus and does not involve any invasive procedures, making it the preferred first-line option for anomaly screening.
Ultrasound uses high-frequency sound waves to create images of the developing fetus. It is a valuable tool for identifying structural abnormalities, such as neural tube defects (e.g., spina bifida), congenital heart defects, and other physical anomalies. If ultrasound findings suggest a potential anomaly, further testing, such as amniocentesis, may be offered to provide more specific information regarding genetic or chromosomal conditions.
Think of ultrasound as a camera that takes a "picture" of the baby inside the womb. By capturing detailed images, healthcare providers can assess whether the baby's development is on track or if any physical issues are present.
The nurse should provide information about the purpose of the anatomy ultrasound and support the client in understanding the implications of this scan.
- Educate the client on the purpose of the ultrasound, reassuring her that it is a standard procedure to monitor fetal health and detect any structural anomalies.
- Explain that the ultrasound is non-invasive and generally safe for both mother and fetus, with no radiation exposure.
- Encourage the client to ask questions and express any concerns she may have about the procedure and potential outcomes.
- If any anomalies are identified, provide emotional support and information about further testing options, such as amniocentesis, for additional diagnosis.
- Collaborate with healthcare providers to ensure the client receives appropriate follow-up care and support if any abnormalities are detected.
✘Incorrect answer options:
Amniocentesis. Amniocentesis is an invasive procedure used to detect chromosomal abnormalities, genetic disorders, and certain fetal infections, usually performed between 15 and 20 weeks gestation if there are specific indications. However, it is not typically used as a primary screening tool for structural anomalies.
Chorionic villi sampling (CVS). CVS is an invasive procedure done between 10 and 13 weeks gestation for early detection of genetic disorders and chromosomal abnormalities. It is not used for detecting fetal structural anomalies and is generally done earlier in pregnancy than the 18-40 week period.
Fetoscopy. Fetoscopy is an invasive procedure involving the insertion of a small camera into the uterus to visualize the fetus. It is rarely used due to its invasive nature and risk of complications and is typically reserved for specific therapeutic interventions rather than routine anomaly screening.
References
- Lowdermilk, D. L., Perry, S. E., Cashion, K., & Alden, K. R. (2020). Maternity and Women's Health Care. Elsevier.
- Pillitteri, A. (2018). Maternal & Child Health Nursing: Care of the Childbearing & Childrearing Family. Lippincott Williams & Wilkins.