OB Chapter 26, Maternity Chapter 9: Antepartum Fetal Assessment

Biophysical risks include factors that originate with either the mother or the fetus and affect the functioning of either one or both. The nurse who provides prenatal care should have an understanding of these risk factors. Match the specific pregnancy problem with the related risk factor. a. Polyhydramnios b. IUGR (maternal cause) c. Oligohydramnios d. Chromosomal abnormalities e. IUGR (fetoplacental cause) 1. Premature rupture of membranes 2. Advanced maternal age 3. Fetal congenital anomalies 4. Abnormal placenta development 5. Smoking, alcohol, and illicit drug use

1. ANS: C DIF: Cognitive Level: Understand REF: p. 635 TOP: Nursing Process: Implementation MSC: Client Needs: Health Promotion and Maintenance 2. ANS: D DIF: Cognitive Level: Understand REF: p. 635 TOP: Nursing Process: Implementation MSC: Client Needs: Health Promotion and Maintenance 3. ANS: A DIF: Cognitive Level: Understand REF: p. 635 TOP: Nursing Process: Implementation MSC: Client Needs: Health Promotion and Maintenance 4. ANS: E DIF: Cognitive Level: Understand REF: p. 635 TOP: Nursing Process: Implementation MSC: Client Needs: Health Promotion and Maintenance 5. ANS: B DIF: Cognitive Level: Understand REF: p. 635 TOP: Nursing Process: Implementation MSC: Client Needs: Health Promotion and Maintenance

On which aspect of fetal diagnostic testing do parents usually place the most importance? a. Safety of the fetus b. Duration of the test c. Cost of the procedure d. Physical discomfort caused by the procedure

ANS: A Although all these are considerations, parents are usually most concerned about the safety of the fetus. Parents are concerned about the duration, but it is not the greatest concern. The cost of the procedure is important to parents, especially those without third-party payers, but is not the greatest concern. Discomfort of the procedure is important, especially for the mother, but is not the greatest concern. PTS: 1 DIF: Cognitive Level: Understanding REF: 165

A newly pregnant patient tells the nurse that she has irregular periods and is unsure of when she got pregnant. Scheduling an ultrasound is a standing prescription for the patient's health care provider. When is the best time for the nurse to schedule the patient's ultrasound? a. Immediately b. In 2 weeks c. In 4 weeks d. In 6 weeks

ANS: A An embryo can be seen about 5 to 6 weeks after the last menstrual period. At this time the crown-rump length (CRL) of the embryo is the most reliable measure of gestational age. Fetal viability is confirmed by observation of fetal heartbeat, which is visible when the CRL of the embryo is 5 mm. PTS: 1 DIF: Cognitive Level: Application REF: 167

The clinic nurse is obtaining a health history on a newly pregnant client. Which is an indication for fetal diagnostic procedures if present in the health history? a. Maternal diabetes b. Weight gain of 25 lb c. Maternal age older than 30 d. Previous infant weighing more than 3000 g at birth

ANS: A Diabetes is a risk factor in pregnancy because of possible impairment of placental perfusion. Excessive weight gain is an indication for testing. Normal weight gain is 25 to 35 lb. A maternal age older than 35 years is an indication for testing. Having had another infant weighing more than 4000 g is an indication for testing. PTS: 1 DIF: Cognitive Level: Analysis REF: 169

What does a score of 9 on a biophysical profile signify? a. Normal b. Abnormal c. Equivocal d. Nonreactive

ANS: A Five parameters of fetal activity—fetal heart rate, fetal breathing movements, gross fetal movements, fetal tone, and amniotic fluid volume—are used to determine the biophysical profile. The maximum score is 2 points for each parameter. A score falling between 8 and 10 is considered normal. A score of 4 or less is considered abnormal. Equivocal and nonreactive are not terms used to describe the results of a biophysical profile. PTS: 1 DIF: Cognitive Level: Understanding REF: 178

When is the most accurate time to determine gestational age through ultrasound? a. First trimester b. Second trimester c. Third trimester d. No difference in accuracy among the trimesters

ANS: A Gestational age determination by ultrasonography is increasingly less accurate after the first trimester. Gestational age determination is best done in the first trimester. There is a difference in trimesters when doing a gestational age ultrasonography. PTS: 1 DIF: Cognitive Level: Understanding REF: 167

A woman is undergoing a nipple-stimulated CST. She is having contractions that occur every 3 minutes. The fetal heart rate (FHR) has a baseline heart rate of approximately 120 beats per minute without any decelerations. What is the correct interpretation of this test? a. Negative b. Positive c. Satisfactory d. Unsatisfactory

ANS: A Adequate uterine activity necessary for a CST consists of three contractions in a 10-minute time frame. If no decelerations are observed in the FHR pattern with the contractions, then the findings are considered to be negative. A positive CST indicates the presence of repetitive late FHR decelerations. The terms satisfactory or unsatisfactory are not applicable.

Which information is the highest priority for the nurse to comprehend regarding the BPP? a. BPP is an accurate indicator of impending fetal well-being. b. BPP is a compilation of health risk factors of the mother during the later stages of pregnancy. c. BPP consists of a Doppler blood flow analysis and an amniotic fluid index (AFI). d. BPP involves an invasive form of an ultrasonic examination.

ANS: A An abnormal BPP score is one indication that labor should be induced. The BPP evaluates the health of the fetus, requires many different measures, and is a noninvasive procedure.

A client asks her nurse, "My doctor told me that he is concerned with the grade of my placenta because I am overdue. What does that mean?" What is the nurse's best response? a. "Your placenta changes as your pregnancy progresses, and it is given a score that indicates how well it is functioning." b. "Your placenta isn't working properly, and your baby is in danger." c. "We need to perform an amniocentesis to detect if you have any placental damage." d. "Don't worry about it. Everything is fine."

ANS: A An explanation of what is meant by the "grade of my placenta" is the most appropriate response. If the client desires further information, the nurse can explain that calcium deposits are significant in postterm pregnancies, and ultrasonography can also be used to determine placental aging. Although stating that the client's placenta is not working properly and that the baby is in danger may be a valid response, it does not reflect therapeutic communication techniques and is likely to alarm the client. An ultrasound, not amniocentesis, is the method of assessment used to determine placental maturation. Telling the client not to worry is not appropriate and discredits her concerns.

A 39-year-old primigravida woman believes that she is approximately 8 weeks pregnant, although she has had irregular menstrual periods all her life. She has a history of smoking approximately one pack of cigarettes a day; however, she tells the nurse that she is trying to cut down. Her laboratory data are within normal limits. What diagnostic technique would be useful at this time? a. Ultrasound examination b. Maternal serum alpha-fetoprotein (MSAFP) screening c. Amniocentesis d. Nonstress test (NST)

ANS: A An ultrasound examination could be performed to confirm the pregnancy and to determine the gestational age of the fetus. An MSAFP screening is performed at 16 to 18 weeks of gestation; therefore, it is too early in the woman's pregnancy to perform this diagnostic test. An amniocentesis is performed if the MSAFP levels are abnormal or if fetal or maternal anomalies are detected. An NST is performed to assess fetal well-being in the third trimester.

Of these psychosocial factors, which has the least negative effect on the health of the mother and/or fetus? a. Moderate coffee consumption b. Moderate alcohol consumption c. Cigarette smoke d. Emotional distress

ANS: A Birth defects in humans have not been related to caffeine consumption. Pregnant women who consume more than 300 mg of caffeine daily may be at increased risk for miscarriage or IUGR. Although the exact effects of alcohol in pregnancy have not been quantified, it exerts adverse effects on the fetus including fetal alcohol syndrome, fetal alcohol effects, learning disabilities, and hyperactivity. A strong, consistent, causal relation has been established between maternal smoking and reduced birth weight. Childbearing triggers profound and complex physiologic and psychologic changes on the mother. Evidence suggests a relationship between emotional distress and birth complications.

The nurse sees a woman for the first time when she is 30 weeks pregnant. The client has smoked throughout the pregnancy, and fundal height measurements now are suggestive of intrauterine growth restriction (IUGR) in the fetus. In addition to ultrasound to measure fetal size, what is another tool useful in confirming the diagnosis? a. Doppler blood flow analysis b. Contraction stress test (CST) c. Amniocentesis d. Daily fetal movement counts

ANS: A Doppler blood flow analysis allows the examiner to study the blood flow noninvasively in the fetus and the placenta. It is a helpful tool in the management of high-risk pregnancies because of IUGR, diabetes mellitus, multiple fetuses, or preterm labor. Because of the potential risk of inducing labor and causing fetal distress, a CST is not performed on a woman whose fetus is preterm. Indications for an amniocentesis include diagnosis of genetic disorders or congenital anomalies, assessment of pulmonary maturity, and the diagnosis of fetal hemolytic disease, not IUGR. Fetal kick count monitoring is performed to monitor the fetus in pregnancies complicated by conditions that may affect fetal oxygenation. Although this may be a useful tool at some point later in this woman's pregnancy, it is not used to diagnose IUGR.

Which analysis of maternal serum may predict chromosomal abnormalities in the fetus? a. Multiple-marker screening b. L/S ratio c. BPP d. Blood type and crossmatch of maternal and fetal serum

ANS: A Maternal serum can be analyzed for abnormal levels of alpha-fetoprotein, human chorionic gonadotropin, and estriol. The multiple-marker screening may predict chromosomal defects in the fetus. The L/S ratio is used to determine fetal lung maturity. A BPP is used for evaluating fetal status during the antepartum period. Five variables are used, but none is concerned with chromosomal problems. The blood type and crossmatch would not predict chromosomal defects in the fetus.

Which information is an important consideration when comparing the CST with the NST? a. The NST has no known contraindications. b. The CST has fewer false-positive results when compared with the NST. c. The CST is more sensitive in detecting fetal compromise, as opposed to the NST. d. The CST is slightly more expensive than the NST.

ANS: A The CST has several contraindications. The NST has a high rate of false-positive results and is less sensitive than the CST but relatively inexpensive.

A pregnant woman's BPP score is 8. She asks the nurse to explain the results. How should the nurse respond at this time? a. "The test results are within normal limits." b. "Immediate delivery by cesarean birth is being considered." c. "Further testing will be performed to determine the meaning of this score." d. "An obstetric specialist will evaluate the results of this profile and, within the next week, will inform you of your options regarding delivery."

ANS: A The normal biophysical score ranges from 8 to 10 points if the amniotic fluid volume is adequate. A normal score allows conservative treatment of high-risk clients. Delivery can be delayed if fetal well-being is indicated. Scores less than 4 should be investigated, and delivery could be initiated sooner than planned. The results of the BPP are usually available immediately after the procedure is performed. Since this score is within normal range, no further testing is required at this time.

The nurse is reviewing maternal serum alpha-fetoprotein (MSAFP) results. Which conditions are associated with elevated levels of MSAFP? (Select all that apply.) a. Fetal demise b. Neural tube defects c. Abdominal wall defects d. Chromosomal trisomies e. Gestational trophoblastic disease

ANS: A, B, C Elevated levels of AFP may indicate open neural tube defects (e.g., anencephaly, spina bifida), abdominal wall defects (e.g., omphalocele, gastroschisis), or fetal demise. Low levels of AFP may indicate chromosomal trisomies (e.g., Down syndrome, trisomy 21) or gestational trophoblastic disease. PTS: 1 DIF: Cognitive Level: Analysis REF: 169

Which assessments are included in the fetal BPP? (Select all that apply.) a. Fetal movement b. Fetal tone c. Fetal heart rate d. AFI e. Placental grade

ANS: A, B, C, D Fetal movement, tone, heart rate, and AFI are all assessed in a BPP. The placental grade is determined by ultrasound and is not included in the criteria of assessment factors for a BPP.

Transvaginal ultrasonography is often performed during the first trimester. A 6-week-gestation client expresses concerns over the necessity for this test. The nurse should explain that this diagnostic test may be necessary to determine which of the following? (Select all that apply.) a. Multifetal gestation b. Bicornuate uterus c. Presence and location of pregnancy d. Amniotic fluid volume e. Presence of ovarian cysts

ANS: A, B, C, E A bicornuate uterus, multifetal gestation, presence of ovarian cysts, and presence and location of pregnancy can be determined by transvaginal ultrasound in the first trimester of pregnancy. This procedure is also used for estimating gestational age, confirming fetal viability, identifying fetal abnormalities or chromosomal defects, and identifying the maternal abnormalities mentioned, as well as fibroids. Amniotic fluid volume is assessed during the second and third trimesters. Conventional ultrasound would be used. PTS: 1 DIF: Cognitive Level: Analysis REF: 167

IUGR is associated with which pregnancy-related risk factors? (Select all that apply.) a. Poor nutrition b. Maternal collagen disease c. Gestational hypertension d. Premature rupture of membranes e. Smoking

ANS: A, B, C, E Poor nutrition, maternal collagen disease, gestational hypertension, and smoking are risk factors associated with the occurrence of IUGR. Premature rupture of membranes is associated with preterm labor, not IUGR.

Transvaginal ultrasonography is often performed during the first trimester. While preparing a 6-week gestational client for this procedure, she expresses concerns over the necessity for this test. The nurse should explain that this diagnostic test may be indicated for which situations? (Select all that apply.) a. Multifetal gestation b. Obesity c. Fetal abnormalities d. Amniotic fluid volume e. Ectopic pregnancy

ANS: A, B, C, E Transvaginal ultrasound is useful in women who are obese whose thick abdominal layers cannot be penetrated with traditional abdominal ultrasound. This procedure is also used to identify multifetal gestation, ectopic pregnancy, estimating gestational age, confirming fetal viability, and identifying fetal abnormalities. Amniotic fluid volume is assessed during the second and third trimester; conventional ultrasound would be used.

Cell-free deoxyribonucleic acid (DNA) screening is a new method of noninvasive prenatal testing (NIPT) that has recently become available in the clinical setting. This technology can provide a definitive diagnosis of which findings? (Select all that apply a. Fetal Rh status b. Fetal gender c. Maternally transmitted gene disorder d. Paternally transmitted gene disorder e. Trisomy 21

ANS: A, B, D, E The NIPT cannot actually distinguish fetal from maternal DNA. It can determine fetal Rh status, gender, trisomies 13, 18, and 21, as well as paternally transmitted gene disorders. The test can be performed any time after 10 weeks of gestation and is recommended for women who have previously given birth to a child with chromosomal abnormalities.

The nurse is instructing a client on how to perform kick counts. Which information should the nurse include in the teaching session? (Select all that apply.) a. Use a clock or timer when performing kick counts. b. Your bladder should be full before performing kick counts. c. Notify your health care provider if you have not felt movement in 24 hours. d. Protocols can provide a structured timetable for concentrating on fetal movements. e. You should lie on your side, place your hands on the largest part of the abdomen, and concentrate on the number of movements felt.

ANS: A, D, E The nurse should instruct the client to lie on her side, place her hands on the largest part of her abdomen, and concentrate on fetal movements. She should use a clock or timer and record the number of movements felt during that time. Protocols are not essential but may give the client a more structured timetable for when to concentrate on fetal movements. The bladder does not need to be full for kick counts; it is better to have the client empty her bladder before beginning the assessment of fetal movements. Further evaluation is recommended if the client feels no movements in 12 hours; 24 hours is too long before notifying the health care provider. PTS: 1 DIF: Cognitive Level: Application REF: 179

The results of a contraction stress test (CST) are positive. Which intervention is necessary based on this test result? a. Repeat the test in 1 week so that results can be trended based on this baseline result. b. Contact the health care provider to discuss birth options for the client. c. Send the client out for a meal and repeat the test to confirm that the results are valid. d. Ask the client to perform a fetal kick count assessment for the next 30 minutes and then reassess the client.

ANS: B A positive CST test is an abnormal finding, and the physician should be notified so that birth options can be initiated. A positive CST indicates possible fetal compromise. Intervention should not be delayed by 1 week and results do not have to be trended. Because this is an abnormal result, there is no need to repeat the test. Sending the client out for a meal will delay treatment options and may interfere with possible birth interventions if anesthesia is needed. Fetal kick count assessment is not needed at this time and will further delay treatment interventions for this abnormal result, which indicates fetal compromise. PTS: 1 DIF: Cognitive Level: Analysis REF: 176

What does nursing care after amniocentesis include? a. Forcing fluids by mouth b. Monitoring uterine activity c. Placing the client in a supine position for 2 hours d. Applying a pressure dressing to the puncture site

ANS: B A risk with amniocentesis is the onset of spontaneous contractions. Hydration is important, but the woman has not been NPO, so this should not be a problem. The supine position may decrease uterine blood flow; the side-lying position is preferred. Pressure dressings are not necessary. PTS: 1 DIF: Cognitive Level: Application REF: 171

A pregnant client has received the results of her triple-screen testing and it is positive. She provides you with a copy of the test results that she obtained from the lab. What would the nurse anticipate as being implemented in the client's plan of care? a. No further testing is indicated at this time because results are normal. b. Refer to the physician for additional testing. c. Validate the results with the lab facility. d. Repeat the test in 2 weeks and have the client return for her regularly scheduled prenatal visit.

ANS: B Additional genetic testing is indicated to provide the client with treatment options. A positive result on a triple-screen test is considered to be an abnormal finding so the client should be referred to the physician for additional genetic testing. Validation of the test with a lab facility is not necessary because the client provided you with a copy of the test results. There is no need to repeat the clinical test because the findings have already been determined. PTS: 1 DIF: Cognitive Level: Analysis REF: 170

For which client would an L/S ratio of 2:1 potentially be considered to be abnormal? a. A 38-year-old gravida 2, para 1, who is 38 weeks' gestation b. A 24-year-old gravida 1, para 0, who has diabetes c. A 44-year-old gravida 6, para 5, who is at term d. An 18-year-old gravida 1, para 0, who is in early labor at term

ANS: B Even though an L/S ratio of 2:1 is typically considered to be a normal finding to validate fetal lung maturity prior to 38 weeks' gestation, the result may not be accurate in determining fetal lung maturity if a client is diabetic. PTS: 1 DIF: Cognitive Level: Analysis REF: 172

The nurse is reviewing the procedure for alpha-fetoprotein (AFP) screening with a patient at 16 weeks' gestation. The nurse determines that the patient understands the teaching when she mentions that which fluid will be collected for the initial screening process? a. Urine b. Blood c. Saliva d. Amniotic

ANS: B Initial screening is completed with blood. AFP can be detected in amniotic fluid; however, that procedure is more costly and invasive. Procedures progress from least invasive to most invasive. PTS: 1 DIF: Cognitive Level: Understanding REF: 169

Which analysis of maternal serum may predict chromosomal abnormalities in the fetus? a. Biophysical profile b. Multiple-marker screening c. Lecithin-to-sphingomyelin ratio d. Blood type and crossmatch of maternal and fetal seru

ANS: B Maternal serum can be analyzed for abnormal levels of alpha-fetoprotein (AFP), human chorionic gonadotropin (hCG), inhibin A, and estriol. The multiple-marker screening may predict chromosomal defects in the fetus. The biophysical profile is used to evaluate fetal status during the antepartum period. Five variables are used, but none are concerned with chromosomal problems. The lecithin-to-sphingomyelin ratio is used to determine fetal lung maturity. The blood type and crossmatch will not predict chromosomal defects in the fetus. PTS: 1 DIF: Cognitive Level: Understanding REF: 170

Which complication could occur as a result of percutaneous umbilical blood sampling (PUBS)? a. Postdates pregnancy b. Fetal bradycardia c. Placenta previa d. Uterine rupture

ANS: B PUBS is an invasive test whereby a needle is inserted into the umbilical cord to obtain blood as the basis for diagnostic testing with the guidance of ultrasound technology. The most common complication is fetal bradycardia, which is temporary. PUBS has no effect on extending the gestation of pregnancy, the development of placenta previa, or uterine rupture. PTS: 1 DIF: Cognitive Level: Analysis REF: 173

Which factor serves as a clinical indicator for a third trimester amniocentesis? a. Sex of the fetus b. Rh isoimmunization c. Placenta previa d. Placental abruption

ANS: B Rh isoimmunization is a clinical indicator for a third-trimester amniocentesis. Although an amniocentesis can determine the sex of the fetus, this is not a primary indication for a third-trimester amniocentesis. Ultrasound imaging would be indicated for evaluation of placenta previa. Ultrasound imaging would be indicated for evaluation of placental abruption. PTS: 1 DIF: Cognitive Level: Analysis REF: 172

A biophysical profile is performed on a pregnant client. The following assessments are noted: nonreactive stress test (NST), three episodes of fetal breathing movements (FBMs), limited gross movements, opening and closing of hang indicating the presence of fetal tone, and adequate amniotic fluid index (AFI) meeting criteria. What would be the correct interpretation of this test result? a. A score of 10 would indicate that the results are equivocal. b. A score of 8 would indicate normal results. c. A score of 6 would indicate that birth should be considered as a possible treatment option. d. A score of 9 would indicate reassurance.

ANS: B The biophysical profile is used to assess fetal well-being. Five categories of assessment are used in this combination test: fetal monitoring NST, evaluation of FBMs, gross movements, fetal tone, and calculation of the amniotic fluid index (AFI). A maximum of 2 points is used if criteria are met successfully in each category; thus a score in the range of 8 to 10 indicates a normal or reassuring finding. A score of 6 provides equivocal results and further testing or observation is necessary. A score of 4 or less requires immediate intervention, and birth may be warranted. The provided assessments indicate a score of 8 as the only area that has not met the stated criteria in the NST. PTS: 1 DIF: Cognitive Level: Analysis REF: 178

The nurse's role in diagnostic testing is to provide which of the following? a. Advice to the couple b. Information about the tests c. Reassurance about fetal safety d. Assistance with decision making

ANS: B The nurse should provide the couple with all necessary information about a procedure so that the couple can make an informed decision. The nurse's role is to inform, not to advise. Ensuring fetal safety is not possible with all the diagnostic tests. To offer this is to give false reassurance to the parents. The nurse can inform the couple about potential problems so they can make an informed decision. Decision making should always lie with the couple involved. The nurse should provide information so that the couple can make an informed decision. PTS: 1 DIF: Cognitive Level: Understanding REF: 179

An MSAFP screening indicates an elevated level of alpha-fetoprotein. The test is repeated, and again the level is reported as higher than normal. What is the next step in the assessment sequence to determine the well-being of the fetus? a. PUBS b. Ultrasound for fetal anomalies c. BPP for fetal well-being d. Amniocentesis for genetic anomalies

ANS: B If MSAFP findings are abnormal, then follow-up procedures include genetic counseling for families with a history of NTD, repeated MSAFP screenings, an ultrasound examination, and possibly amniocentesis. Indications for the use of PUBS include prenatal diagnosis of inherited blood disorders, karyotyping of malformed fetuses, detection of fetal infection, determination of the acid-base status of fetuses with IUGR, and assessment and treatment of isoimmunization and thrombocytopenia in the fetus. A BPP is a method of assessing fetal well-being in the third trimester. Before an amniocentesis, the client would have an ultrasound for direct visualization of the fetus.

The nurse is planning the care for a laboring client with diabetes mellitus. This client is at greater risk for which clinical finding? a. Oligohydramnios b. Polyhydramnios c. Postterm pregnancy d. Chromosomal abnormalities

ANS: B Polyhydramnios or amniotic fluid in excess of 2000 ml is 10 times more likely to occur in the client with diabetes mellitus rather than in nondiabetic pregnancies. This complication places the mother at risk for premature rupture of membranes, premature labor, and postpartum hemorrhage. Prolonged rupture of membranes, IUGR, intrauterine fetal death, and renal agenesis (Potter syndrome) place the client at risk for developing oligohydramnios. Anencephaly, placental insufficiency, and perinatal hypoxia contribute to the risk for postterm pregnancy. Maternal age older than 35 years and balanced translocation (maternal and paternal) are risk factors for chromosomal abnormalities.

A 41-week pregnant multigravida arrives at the labor and delivery unit after a NST indicated that her fetus could be experiencing some difficulties in utero. Which diagnostic tool yields more detailed information about the condition of the fetus? a. Ultrasound for fetal anomalies b. Biophysical profile (BPP) c. MSAFP screening d. Percutaneous umbilical blood sampling (PUBS)

ANS: B Real-time ultrasound permits a detailed assessment of the physical and physiologic characteristics of the developing fetus and a cataloging of normal and abnormal biophysical responses to stimuli. The BPP is a noninvasive, dynamic assessment of a fetus that is based on acute and chronic markers of fetal disease. An ultrasound for fetal anomalies would most likely have occurred earlier in the pregnancy. It is too late in the pregnancy to perform an MSAFP. Furthermore, it does not provide information related to fetal well-being. Indications for PUBS include prenatal diagnosis or inherited blood disorders, karyotyping of malformed fetuses, detection of fetal infection, determination of the acid-base status of the fetus with IUGR, and assessment and treatment of isoimmunization and thrombocytopenia in the fetus.

Which clinical finding is a major use of ultrasonography in the first trimester? a. Amniotic fluid volume b. Presence of maternal abnormalities c. Placental location and maturity d. Cervical length

ANS: B Ultrasonography can detect certain uterine abnormalities such as bicornuate uterus, fibroids, and ovarian cysts. Amniotic fluid volume, placental location and maturity, and cervical length are not available via ultrasonography until the second or third trimester.

Which nursing intervention is necessary before a first-trimester transabdominal ultrasound? a. Place the woman on nothing by mouth (nil per os [NPO]) for 12 hours. b. Instruct the woman to drink 1 to 2 quarts of water. c. Administer an enema. d. Perform an abdominal preparation.

ANS: B When the uterus is still in the pelvis, visualization may be difficult. Performing a first-trimester transabdominal ultrasound requires the woman to have a full bladder, which will elevate the uterus upward and provide a better visualization of the fetus; therefore, being NPO is not appropriate. Neither an enema nor an abdominal preparation is necessary for this procedure.

A woman who is 36 weeks pregnant asks the nurse to explain the vibroacoustic stimulator (VAS) test. Which should the nurse include in the response? (Select all that apply.) a. The test is invasive. b. The test uses sound to elicit fetal movements. c. The test may confirm nonreactive non-stress test results. d. The test can only be performed if contractions are present. e. Vibroacoustic stimulation can be repeated at 1-minute intervals up to three times.

ANS: B, C, E Also referred to as VAS or acoustic stimulation, the vibroacoustic stimulator (similar to an electronic larynx) is applied to the maternal abdomen over the area of the fetal head. Vibration and sound are emitted for up to 3 seconds and may be repeated. A fetus near term responds by increasing the number of gross body movements, which can be easily seen and felt. The procedure can confirm reassuring NST findings and shorten the length of time necessary to obtain NST data. The test is noninvasive and contractions do not need to be present to perform the test. PTS: 1 DIF: Cognitive Level: Application REF: 176

In preparing a pregnant client for a non-stress test (NST), which of the following should be included in the plan of care? a. Have the client void prior to being placed on the fetal monitor because a full bladder will interfere with results. b. Maintain NPO status prior to testing. c. Position the client for comfort, adjusting the tocotransducer belt to locate fetal heart rate. d. Have an infusion pump prepared with oxytocin per protocol for evaluation.

ANS: C The nurse must adjust the tocotransducer to find the best location to pick up and record the fetal heart rate. Positioning the client for comfort during testing is a prime concern. Although a full bladder may affect client comfort, it will not interfere with testing results. NPO status is not required for an NST. Instead, a pregnant client should maintain her normal nutritional intake to provide energy to herself and the fetus. An infusion pump with oxytocin is required for a contraction stress test (CST). PTS: 1 DIF: Cognitive Level: Analysis REF: 174

The primary reason for evaluating alpha-fetoprotein (AFP) levels in maternal serum is to determine whether the fetus has which? a. Hemophilia b. Sickle cell anemia c. A neural tube defect d. A normal lecithin-to-sphingomyelin ratio

ANS: C An open neural tube allows a high level of AFP to seep into the amniotic fluid and enter the maternal serum. Hemophilia is a genetic defect and is best detected with chromosomal studies, such as chorionic villus sampling or amniocentesis. Sickle cell anemia is a genetic defect and is best detected with chromosomal studies such as chorionic villus sampling or amniocentesis. L/S ratios are determined with an amniocentesis and are usually done in the third trimester. PTS: 1 DIF: Cognitive Level: Understanding REF: 168

A pregnant woman is scheduled to undergo chorionic villus sampling (CVS) based on genetic family history. Which medication does the nurse anticipate will be administered? a. Magnesium sulfate b. Prostaglandin suppository c. RhoGAM if the client is Rh-negative d. Betamethasone

ANS: C CVS can increase the likelihood of Rh sensitization if a woman in Rh-negative. There is no indication for magnesium sulfate because it is used to stop preterm labor. There is no indication for administration of a prostaglandin suppository. Betamethasone is given to pregnant women in preterm labor to improve fetal lung maturity. PTS: 1 DIF: Cognitive Level: Analysis REF: 170

When is the earliest that chorionic villus sampling can be performed during pregnancy? a. 4 weeks b. 8 weeks c. 10 weeks d. 12 weeks

ANS: C Fetal villus tissue can be obtained as early as 10 weeks of gestation and can be analyzed directly for chromosomal or genetic abnormalities. It is too early to be performed at 4 weeks. It is too early to be performed at 8 weeks. The test should be performed at 12 weeks, but it can be done as early as 10 weeks. PTS: 1 DIF: Cognitive Level: Understanding REF: 170

Which is the major advantage of chorionic villus sampling over amniocentesis? a. It is not an invasive procedure. b. It does not require a hospital setting. c. It requires less time to obtain results. d. It has less risk of spontaneous abortion.

ANS: C Results from chorionic villus sampling can be known within 24 to 48 hours, whereas results from amniocentesis require 2 to 4 weeks. It is an invasive procedure. The woman has to be in a hospital setting for her and the fetus to be properly assessed during and after the procedure. The risk of an abortion is at the same level for both procedures. PTS: 1 DIF: Cognitive Level: Understanding REF: 170

What is the term for a non-stress test in which there are two or more fetal heart rate accelerations of 15 or more bpm with fetal movement in a 20-minute period? a. Positive b. Negative c. Reactive d. Nonreactive

ANS: C The non-stress test (NST) is reactive (normal) when there are two or more fetal heart rate accelerations of at least 15 bpm (each with a duration of at least 15 seconds) in a 20-minute period. A positive result is not used with an NST. The contraction stress test (CST) uses positive as a result term. A negative result is not used with an NST. The CST uses negative as a result term. A nonreactive result means that the heart rate did not accelerate during fetal movement. PTS: 1 DIF: Cognitive Level: Analysis REF: 174

A patient at 36 weeks gestation is undergoing a non-stress (NST) test. The nurse observes the fetal heart rate baseline at 135 beats per minute (bpm) and four nonepisodic patterns of the fetal heart rate reaching 160 bpm for periods of 20 to 25 seconds each. How will the nurse record these findings? a. NST positive, nonreassuring b. NST negative, reassuring c. NST reactive, reassuring d. NST nonreactive, nonreassuring

ANS: C The presence of at least three accelerations of at least 15 beats, over at least 15 seconds, over a duration of at least 20 minutes, is considered reactive and reassuring. Nonreactive testing reveals no or fewer accelerations over the same or longer period. The NST test is not recorded as positive or negative. PTS: 1 DIF: Cognitive Level: Analysis REF: 175

In the past, factors to determine whether a woman was likely to develop a high-risk pregnancy were primarily evaluated from a medical point of view. A broader, more comprehensive approach to high-risk pregnancy has been adopted today. Four categories have now been established, based on the threats to the health of the woman and the outcome of pregnancy. Which category should not be included in this group? a. Biophysical b. Psychosocial c. Geographic d. Environmental

ANS: C A geographic category is correctly referred to as sociodemographic risk. These factors stem from the mother and her family. Ethnicity may be one of the risks to pregnancy; however, it is not the only factor in this category. Low income, lack of prenatal care, age, parity, and marital status also are included. Biophysical is one of the broad categories used for determining risk. These include genetic considerations, nutritional status, and medical and obstetric disorders. Psychosocial risks include smoking, caffeine, drugs, alcohol, and psychologic status. All of these adverse lifestyles can have a negative effect on the health of the mother or fetus. Environmental risks are risks that can affect both fertility and fetal development. These include infections, chemicals, radiation, pesticides, illicit drugs, and industrial pollutants.

At 35 weeks of pregnancy, a woman experiences preterm labor. Although tocolytic medications are administered and she is placed on bed rest, she continues to experience regular uterine contractions and her cervix is beginning to dilate and efface. What is an important test for fetal well-being at this time? a. PUBS b. Ultrasound for fetal size c. Amniocentesis for fetal lung maturity d. NST

ANS: C Amniocentesis is performed to assess fetal lung maturity in the event of a preterm birth. The fluid is examined to determine the lecithin to sphingomyelin (L/S) ratio. Indications for PUBS include prenatal diagnosis or inherited blood disorders, karyotyping of malformed fetuses, detection of fetal infection, determination of the acid-base status of the fetus with IUGR, and assessment and treatment of isoimmunization and thrombocytopenia in the fetus. Determination of fetal size by ultrasound is typically performed during the second trimester and is not indicated in this scenario. An NST measures the fetal response to fetal movement in a noncontracting mother.

A client in the third trimester has just undergone an amniocentesis to determine fetal lung maturity. Which statement regarding this testing is important for the nurse in formulating a care plan? a. Because of new imaging techniques, an amniocentesis should have been performed in the first trimester. b. Despite the use of ultrasonography, complications still occur in the mother or infant in 5% to 10% of cases. c. Administration of Rho(D) immunoglobulin may be necessary. d. The presence of meconium in the amniotic fluid is always a cause for concern.

ANS: C As a result of the possibility of fetomaternal hemorrhage, administration of Rho(D) immunoglobulin is the standard of practice after amniocentesis for women who are Rh negative. Amniocentesis is possible after the 14th week of pregnancy when the uterus becomes an abdominal organ. Complications occur in less than 1% of cases; many have been minimized or eliminated through the use of ultrasonography. Meconium in the amniotic fluid before the beginning of labor is not usually a problem.

While working with the pregnant client in her first trimester, what information does the nurse provide regarding when CVS can be performed (in weeks of gestation)? a. 4 b. 8 c. 10 d. 14

ANS: C CVS can be performed in the first or second trimester, ideally between 10 and 13 weeks of gestation. During this procedure, a small piece of tissue is removed from the fetal portion of the placenta. If performed after 9 completed weeks of gestation, then the risk of limb reduction is no greater than in the general population.

The indirect Coombs' test is a screening tool for Rh incompatibility. If the titer is greater than ______, amniocentesis may be a necessary next step. a. 1:2 b. 1:4 c. 1:8 d. 1:12

ANS: C If the maternal titer for Rh antibodies is greater 1:8, then an amniocentesis is indicated to determine the level of bilirubin in the amniotic fluid. This testing will determine the severity of fetal hemolytic anemia.

Which information should nurses provide to expectant mothers when teaching them how to evaluate daily fetal movement counts (DFMCs)? a. Alcohol or cigarette smoke can irritate the fetus into greater activity. b. Kick counts should be taken every hour and averaged every 6 hours, with every other 6-hour stretch off. c. The fetal alarm signal should go off when fetal movements stop entirely for 12 hours. d. A count of less than four fetal movements in 1 hour warrants future evaluation.

ANS: C No movement in a 12-hour period is cause for investigation and possibly intervention. Alcohol and cigarette smoke temporarily reduce fetal movement. The mother should count fetal activity (kick counts) two or three times daily for 60 minutes each time. A count of less than 3 in 1 hour warrants further evaluation by a NST.

A 30-year-old gravida 3, para 2-0-0-2 is at 18 weeks of gestation. Which screening test should the nurse recommend be ordered for this client? a. BPP b. Chorionic villi sampling c. MSAFP screening d. Screening for diabetes mellitus

ANS: C The biochemical assessment MSAFP test is performed from week 15 to week 20 of gestation (weeks 16 to 18 are ideal). A BPP is a method of biophysical assessment of fetal well-being in the third trimester. Chorionic villi sampling is a biochemical assessment of the fetus that should be performed from the 10th to 12th weeks of gestation. Screening for diabetes mellitus begins with the first prenatal visit.

Which clinical conditions are associated with increased levels of alpha fetoprotein (AFP)? (Select all that apply.) a. Down syndrome b. Molar pregnancy c. Twin gestation d. Incorrect gestational age assessment of a normal fetus—estimation is earlier in the pregnancy e. Threatened abortion

ANS: C, D, E Elevated APF levels are seen in multiple gestations, underestimation of fetal age, and threatened abortion. Decreased levels are seen in Down syndrome and a molar pregnancy. PTS: 1 DIF: Cognitive Level: Analysis REF: 169

The nurse is preparing a client for a non-stress test (NST). Which interventions should the nurse plan to implement? (Select all that apply.) a. Ensure that the client has a full bladder. b. Plan approximately 15 minutes for the test. c. Have the client sit in a recliner with the head elevated 45 degrees. d. Apply electronic monitoring equipment to the client's abdomen. e. Instruct the client to press an event marker every time she feels fetal movement.

ANS: C, D, E The client may be seated in a reclining chair or have her head elevated at least 45 degrees. The nurse applies external electronic monitoring equipment to the client's abdomen to detect the fetal heart rate and any contractions. The woman may be given an event marker to press each time she senses movement. Before the NST, the client should void and her baseline vital signs should be taken. The NST takes about 40 minutes, allowing for most fetal sleep-wake cycles, although the fetus may show a reassuring pattern more quickly or need more time to awaken and become active. Fifteen minutes would not allow enough time to complete the test. PTS: 1 DIF: Cognitive Level: Application REF: 174

What is the purpose of amniocentesis for a client hospitalized at 34 weeks of gestation with pregnancy-induced hypertension? a. Determine if a metabolic disorder is genetic. b. Identify the sex of the fetus. c. Identify abnormal fetal cells. d. Determine fetal lung maturity.

ANS: D During the third trimester, amniocentesis is most often performed to determine fetal lung maturity. In cases of pregnancy-induced hypertension, preterm birth may be necessary because of changes in placental perfusion. The test is done in the early portion of the pregnancy if the metabolic disorder is genetic. Amniocentesis is done early in the pregnancy to do genetic studies and determine the sex. Identification of abnormal cells is done during the early portion of the pregnancy. PTS: 1 DIF: Cognitive Level: Analysis REF: 172

Which should be considered a contraindication for transcervical chorionic villus sampling? a. Rh-negative mother b. Gestation less than 15 weeks c. Maternal age younger than 35 years d. Positive for group B Streptococcus

ANS: D Maternal infection is a risk with this procedure, and it is contraindicated if the client has an active infection in the cervix, vagina, or pelvic area. This procedure is done between 10 and 12 weeks. This procedure is usually done for women older than 35; however, if the woman is at high risk for fetal anomalies, her age is not a contraindication. The procedure can still be performed; however, Rh sensitization may occur if the mother is Rh-negative. Rho(D) immune globulin can be administered following the procedure. PTS: 1 DIF: Cognitive Level: Analysis REF: 170

What is the purpose of initiating contractions in a contraction stress test (CST)? a. Increase placental blood flow. b. Identify fetal acceleration patterns. c. Determine the degree of fetal activity. d. Apply a stressful stimulus to the fetus.

ANS: D The CST involves recording the response of the fetal heart rate to stress induced by uterine contractions. The CST records the fetal response to stress. It does not increase placental blood flow. The NST looks at fetal heart accelerations with fetal movements. The NST and biophysical profiles look at fetal movements. PTS: 1 DIF: Cognitive Level: Understanding REF: 176

Which response by the nurse is most appropriate to the statement, "This test isn't my idea, but my husband insists?" a. "It's your decision." b. "Don't worry. Everything will be fine." c. "Why don't you want to have this test?" d. "You're concerned about having this test?"

ANS: D The nurse should clarify the statement and assist the client in exploring her feelings about the test. "It's your decision" is a closed statement and does not encourage the woman to express her feelings. "Don't worry" is false reassurance and does not deal with the concerns expressed by the woman. The woman may not be able to answer "why" questions. It may also make her defensive. PTS: 1 DIF: Cognitive Level: Application REF: 174

Which nursing intervention is necessary prior to a second-trimester transabdominal ultrasound? a. Perform an abdominal prep. b. Administer a soap suds enema. c. Ensure the client is NPO for 12 hours. d. Instruct the client to drink 1 to 2 quarts of water.

ANS: D When the uterus is still in the pelvis, visualization may be difficult. It is necessary to perform the test when the woman has a full bladder, which provides a window through which the uterus and its contents can be viewed. An abdominal prep is not necessary for this procedure. A soap suds enema is not necessary for this procedure. The client needs a full bladder to elevate the uterus; therefore, being NPO would not be appropriate. PTS: 1 DIF: Cognitive Level: Application REF: 168

Nurses should be aware of the strengths and limitations of various biochemical assessments during pregnancy. Which statement regarding monitoring techniques is the most accurate? a. Chorionic villus sampling (CVS) is becoming more popular because it provides early diagnosis. b. MSAFP screening is recommended only for women at risk for NTDs. c. PUBS is one of the triple-marker tests for Down syndrome. d. MSAFP is a screening tool only; it identifies candidates for more definitive diagnostic procedures.

ANS: D MSAFP is a screening tool, not a diagnostic tool. CVS provides a rapid result, but it is declining in popularity because of advances in noninvasive screening techniques. An MSAFP screening is recommended for all pregnant women. MSAFP screening, not PUBS, is part of the triple-marker tests for Down syndrome.

How does the nurse document a NST during which two or more FHR accelerations of 15 beats per minute or more occur with fetal movement in a 20-minute period? a. Nonreactive b. Positive c. Negative d. Reactive

ANS: D The NST is reactive (normal) when two or more FHR accelerations of at least 15 beats per minute (each with a duration of at least 15 seconds) occur in a 20-minute period. A nonreactive result means that the heart rate did not accelerate during fetal movement. A positive result is not used with NST. CST uses positive as a result term. A negative result is not used with NST. CST uses negative as a result term.

In comparing the abdominal and transvaginal methods of ultrasound examination, which information should the nurse provide to the client? a. Both require the woman to have a full bladder. b. The abdominal examination is more useful in the first trimester. c. Initially, the transvaginal examination can be painful. d. The transvaginal examination allows pelvic anatomy to be evaluated in greater detail.

ANS: D The transvaginal examination allows pelvic anatomy to be evaluated in greater detail than the abdominal method and also allows intrauterine pregnancies to be diagnosed earlier. The abdominal examination requires a full bladder; the transvaginal examination requires an empty one. The transvaginal examination is more useful in the first trimester; the abdominal examination works better after the first trimester. Neither the abdominal nor the transvaginal method of ultrasound examination should be painful, although the woman will feel pressure as the probe is moved during the transvaginal examination.

A woman arrives at the clinic seeking confirmation that she is pregnant. The following information is obtained: She is 24 years old with a body mass index (BMI) of 17.5. She admits to having used cocaine "several times" during the past year and occasionally drinks alcohol. Her blood pressure is 108/70 mm Hg. The family history is positive for diabetes mellitus and cancer. Her sister recently gave birth to an infant with a neural tube defect (NTD). Which characteristics places this client in a high-risk category? a. Blood pressure, age, BMI b. Drug and alcohol use, age, family history c. Family history, blood pressure (BP), BMI d. Family history, BMI, drug and alcohol abuse

ANS: D The woman's family history of an NTD, her low BMI, and her drug and alcohol use abuse are high risk factors of pregnancy. The woman's BP is normal, and her age does not put her at risk. Her BMI is low and may indicate poor nutritional status, which is a high risk.

A pregnant client's biophysical profile score is 8. She asks the nurse to explain the results. What is the nurse's best response? a. "The test results are within normal limits." b. "Immediate birth by cesarean birth is being considered." c. "Further testing will be performed to determine the meaning of this score." d. "An obstetric specialist will evaluate the results of this profile and, within the next week, will inform you of your options regarding birth."

a. "The test results are within normal limits."