A child with suspected Down syndrome has been born to 32-year-old parents. The parents ask the nurse how the diagnosis will be made, and if there was a way that the diagnosis could have been made during the pregnancy
The best response by the nurse is: 1. "The baby's genes could have been tested during pregnancy by doing an amniocentesis."
2. "The doctor will check the baby's genes by doing a 24-hour urine collection on your child."
3. "Mom's blood could have been tested during the pregnancy to check for genetic problems with the baby."
4. "A swab of the baby's cheek or a stool sample will be used to check your baby's chromosomes."
1
Rationale:
1. A genetic amniocentesis is the removal of a small amount of amniotic fluid is obtained by inserting a needle through the abdominal wall into the uterus. The amniotic fluid is then processed to examine the chromosomes.
2. Suspected genetic conditions in newborns are diagnosed by examining the baby's chromosomes either from a blood sample or from a swab of the inside of the cheek.
3. Mom's blood would contain the mother's chromosomes, not the baby's. Prenatal genetic testing is accomplished through genetic amniocentesis. A small amount of amniotic fluid is obtained by inserting a needle through the abdominal wall into the uterus. The amniotic fluid is then processed to examine the chromosomes.
4. Although a cheek swab can be used for genetic testing, stool samples cannot. Because part of the answer is incorrect, the whole answer is incorrect.
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