Ch 6. Maternity

Which congenital malformations result from multifactorial inheritance? (Select all that apply.)

A. Cleft Lip, B. Congenital Heart disease, D. Anencephaly , E. Pyloric Stenosis

At approximately __________weeks of gestation, lecithin is forming on the alveolar surfaces, the eyelids open, and the fetus measures approximately 27 cm crown to rump and weighs approximately 1110 g.

28

The measurement of lecithin in relation to sphingomyelin (L/S ratio) is used to determine fetal lung maturity. Which ratio reflects maturity of the lungs?

2:1

Congenital disorders refer to conditions that are present at birth. These disorders may be inherited and caused by environmental factors or maternal malnutrition. Toxic exposures have the greatest effect on development between 15 and 60 days of gestation. For the nurse to be able to conduct a complete assessment of the newly pregnant patient, she should understand the significance of exposure to known human teratogens. These include (Select all that apply.)

A. infections, B. Radiation, C. Maternal Conditions, D. Drugs, E. Chemicals

A father and mother are carriers of phenylketonuria (PKU). Their 2-year-old daughter has PKU. The couple tells the nurse that they are planning to have a second baby. Because their daughter has PKU, they are sure that their next baby won't be affected. What response by the nurse is most accurate?

You are both carriers, so ext baby has a 25% chance of being affected

With regard to chromosome abnormalities, nurses should be aware that

abnormalities of number are the leading cause of pregnancy loss

A key finding from the Human Genome Project is

approx. 20,500 genes make up the genome

As relates to the structure and function of the placenta, the maternity nurse should be aware that

as one if its early functions, the placenta acts as an endocrine gland

A pregnant woman at 25 weeks' gestation tells the nurse that she dropped a pan last week and her baby jumped at the noise. Which response by the nurse is most accurate?

babies respond to sound starting at about 24 weeks of gestation

The nurse is assessing the knowledge of new parents with a child born with maple syrup urine disease (MSUD). This is an autosomal recessive inherited disorder, which means that

both genes of a pair must be abnormal for the disorder to be expressed

The is/are responsible for oxygen and carbon dioxide transport to and from the maternal bloodstream

chorionic villi

The placenta allows exchange of oxygen, nutrients, and waste products between the mother and fetus by

contact between maternal blood and fetal capillaries within the chorionic villi

In presenting to obstetric nurses interested in genetics, the genetic nurse identifies the primary risk(s) associated with genetic testing a

denial of insurance benefits

The nurse is providing genetic counseling for an expectant couple who already have a child with trisomy 18. The nurse should

discuss the options with the couple, including amniocentesis to determine whether or not the fetus is affected.

The nurse caring for the laboring woman should know that meconium is produced by

fetal intestines

The nurse must be cognizant that an individual's genetic makeup is known as his or her

genotype

The most basic information a maternity nurse should have regarding conception is that

implantation in the endometrium occurs 6-10 days after conception

The nurse caring for a pregnant patient knows that her health teaching regarding fetal circulation has been effective when the patient reports that she has been sleeping

in a side- lying position

A maternity nurse should be aware of which fact about the amniotic fluid?

it serves as a source of oral fluid and a repository for waste from the fetus

With regard to the development of the respiratory system, maternity nurses should understand that

maternal hypertension can reduce maternal-placenta blood flow, accelerating lung maturity

With regard to prenatal genetic testing, nurses should be aware that

maternal serum screening can determine whether a pregnant woman is carrying a fetus with down syndrome

A new mother asks the nurse about the ―white substance‖ covering her infant. The nurse explains that the purpose of vernix caseosa is to

protect the fetal skin from amniotic fluid

A man's wife is pregnant for the third time. One child was born with cystic fibrosis, and the other child is healthy. The man wonders what the chance is that this child will have cystic fibrosis. This type of testing is known as

recurrence risk

In practical terms regarding genetic health care, nurses should be aware that

the most important of all nursing functions is providing emotional support to the family during counseling

Sally comes in for her first prenatal examination. This is her first child. She asks you (the nurse), ―How does my baby get air inside my uterus?‖ The correct response is

the placenta provides oxygen tot he baby and excretes carbon dioxide into your bloodstream

With regard to the estimation and interpretation of the recurrence of risks for genetic disorders, nurses should be aware that

the risk factor remains the same no matter how many affected children are in the family

A woman's cousin gave birth to an infant with a congenital heart anomaly. The woman asks the nurse when such anomalies occur during development. Which response by the nurse is most accurate?

they occur between the third and fifth weeks of development

Many parents-to-be have questions about multiple births. Maternity nurses should be able to tell them that

twinning and other multiple births are increasing because of the use of fertility drugs and delayed child bearing

A woman is 15 weeks pregnant with her first baby. She asks how long it will be before she feels the baby move. The best answer is

within the next month, you should start to feel fluttering sensations

A woman asks the nurse, ―What protects my baby's umbilical cord from being squashed while the baby's inside of me?‖ The nurse's best response is

your babies umbilical cord is surrounded by connective tissue called Whartons jelly which prevents compression of the blood vessels and ensures continued nourishment of your baby

A woman who is 8 months pregnant asks the nurse, ―Does my baby have any antibodies to fight infection?‖ The most appropriate response by the nurse is

your baby has IgG and IgM