OB Exam 2 Flashcards
Appropriate timing for specific prenatal testing
First trimester ultrasound
confirms pregnancy and viability, determines gestational age, rules out ectopic pregnancy, detect multiple gestations, visualization if doing chorionic villi sampling, detect maternal abnormalities such at cysts, fibroids, etc.
Appropriate timing for specific prenatal testing
Second trimester ultrasound
establish or confirm dates, detect polyhydramnios and oligohydramnios, detect congenital anomalies, assess placenta function, visualization during amniocentesis
Appropriate timing for specific prenatal testing
Third trimester ultrasound
Detect macrosomia, detect congenital anomalies, detect IUGR, determine fetal position, detect placenta previa or abruption, visualization during amniocentesis or external version, amniotic fluid volume assessment, doppler flow studies
Nuchal translucency
between 10-14 weeks via ultrasound to check for abnormality that could indicate chromosomal disorder. Greater than 3 mm is considered abnormal
Fetal heart activity
by about 6 weeks of gestation via transvaginal ultrasound
Placental position and appearance-
18-23 weeks of gestation. Most cases of placenta previa diagnosed during second trimester resolve by term
Amniocentesis
possible after 14 weeks of pregnancy
Chorionic villi sampling
first trimester- popular technique for genetic studies – between 10-13 weeks
Percutaneous umbilical cord sampling
second and third trimesters- used for fetal blood sampling and transfusion
Coombs test
screening tool for rh compatibility.
Biophysical profile scoring-
Fetal breathing movements:
- score 2- at least one episode of breathing movements of at least 20 seconds
- score 0- absent fetal breathing movements or less than 30 seconds
Fetal movements:
- score 2- at least three trunk/ limb movements in 30 minutes
- score 0- fewer than 3 episodes of movements in 30 minutes
fetal tone:
- score 2- at least one episode of active extension with return to flexion of fetal limb or trunk
- score 0- absence of movement or slow flexion and extension
Biophysical profile scoring-
amniotic fluid index:
- score 2- deepest vertical pocket greater than 2 cm
- score 0- deepest vertical pocket less than 2 cm
nonstress test:
- score 2- reactive
- score 0- nonreactive
MSAFP/triple marker
analysis of results- performed at 16-18 weeks of gestation, measures the level of three maternal serum makers; MSAFP, hCG and unconjugated estriol.
**MSAFP alone can detect neural tube defects. Clients who have abnormal findings should be referred to further screening.
a. ) If a fetus has trisomy 21; the MSAFP and unconjugated levels are low and the hCG will be elevated.
b. ) Low values in all markers is associated with trisomy 18 in the fetus
Amniocentesis:
teaching/lung maturity- the aspiration of amniotic fluid for analysis by insertion of a needle transabdominally into a client’s uterus and amniotic sav under direct ultrasound guidance. **Performed after 14 weeks of gestation.
Amniocentesis Teaching:
> explain procedure to patient and obtain informed consent, assist client to supine position and place a wedge under her right hip to display the uterus off the vena cava
> place a drape over the client exposing only her abdomen
> prepare for ultrasound to locate placenta
> cleanse client’s abdomen with an antiseptic solution prior to administration of a local anesthetic
> tell the patient that she will feel slight pressure as the needle is inserted. She should continue breathing because holding her breath will lower her diaphragm
Amniocentesis Teaching 2:
monitor vital signs , FHR and uterine contractions throughout and 30 minutes following the procedure. Client should rest for 30 minutes. Tell client to report any fever, chills, leakage of fluid, or bleeding, decreased fetal movement, vaginal bleeding or contractions. Encourage client to drink plenty of liquids and rest for 24 hours post procedure
Lung maturity
Amniotic fluid is tested to determine whether the fetal lungs are mature enough to adapt to extrauterine life. L/S ratio- 2:1 indicates lung maturity. Absence of PG is associated with respiratory distress.
Diab during preg.
ideal blood sugar during pregnancy should range between 70-110
increased risks to fetus-
> spontaneous abortion related to poor glycemic control
> infections related to increased glucose in urine
> decreased resistance because of altered carb metabolism
> hydramnios which can cause overdistention of the uterus
> premature ROM- preterm labor or hemorrhage
> ketoacidosis- untreated hyperglycemia
> hypo/hyperglycemia
Hypoglycemia
nervous, headache, weakness, irritability, hunger, blurred vision, tingling of mouth or extremities.
Hyperglycemia
polydipsia, polyphagia, polyuria, nausea, abdominal pain, flushed dry skin, fruity breath
Lab tests
routine UA with glycosuria
Glucola screening/1 hour glucose test
- 50 g oral glucose load followed by blood sugar check 1 hour later. Performed between 24-28 weeks gestation. Positive if BS above 130/140- 3 hour testing is done then
Diab interventions
**Women who have gestation diabetes are generally treated with diet and exercise alone. If glucose levels are persistently high, then insulin is begun. Glyburide and metformin may be given for oral hypoglycemics. **
Cardiac Decompensation Assessment
- Increased fatigue or difficulty breathing with usual activities
- Feeling of being smothered
- Frequent cough
- Palpitations
- Generalized edema (weight gain)
- Irregular weak rapid pulse
- Crackles at bases of lungs
- Orthopnea
- Rapid respirations
- Most, frequent cough
- Cyanosis of lips and nail beds
Preeclampsia
hypertension and proteinuria develop after 20 weeks gestation in a woman who never previously had either condition.
S&S of Preeclampsia
- Blood pressure greater than 160/110 mm HG
- Proteinuria greater than 3+
- Elevated serum creatinine greater than 1.1
- Cerebral or visual disturbances (headache and blurred vision)
- Hyperreflexia with possible ankle clonus
- Pulmonary or cardiac involvement
- Peripheral edema that is extensive
- Thrombocytopenia
- Right upper quadrant pain
**daily dose of aspirin to be given in first trimester if patient has a history of preeclampsia
Hypertension related disorders teaching
> Take blood pressure as directed, always sit to take it and use your right arm each time for consistent readings
> Report any increase to health care provider
> Dipstick test you clean catch urine to test for protein
> Encourage lateral position
> Perform NST and daily kick counts
> Instruct the client to monitor I&O.
HELLP syndrome
a variant of gestational hypertension in which hematologic conditions coexist with severe preeclampsia involving hepatic dysfunction. HELLP syndrome is diagnosed by lab tests, not clinically. Symptoms tend to worsen at night and improve in the day time. General feeling of malaise, influenza like symptoms.
HELLP syndrome acrym
- H: hemolysis; resulting in anemia and jaundice
- EL; elevated liver enzymes- elevated ALT or AST, epigastric pain and n/v
- LP; low platelet- less than 100,000 mm. Resulting in thrombocytopenia, abnormal bleeding and clotting time. Bleeding gums, petechiae, and possibly disseminated intravascular coagulation
** important to remember than many women with HELLP syndrome may not have signs or symptoms of preeclampsia with severe features. Most women will have hypertension but proteinuria may be absent, as a result women are misdiagnosed.
Discharge instructions for HELP syndrom
> Maintain bed rest and encourage side lying position
> Promote diversional activities (watch TV, visit with family)
> Avoid foods high in NA and avoid alcohol, caffeine and tobacco
> Drink six to eight 8 oz glasses of water per day
> Maintain a dark quiet environment to avoid stimuli that can precipitate a seizure
> Administer antihypertensives as prescribed
Eclampsia
severe preeclampsia manifestations with the onset of seizure activity or coma.
- Preceded by a headache, severe epigastric pain, hyperreflexia, and hemoconcentrations (warning signs for convulsions)
Anti-convulsant medication: Magnesium sulfate:
medication of choice for prophylaxis or treatment to depress the CNS and prevent seizures in the client who has eclampsia and severe preeclampsia
Use an infusion control device to maintain regular flow rate
- Inform client that she can initially feel flushed, hot, sedated
- Monitor BP, pulse, respiratory rate, deep tendon reflexes, LOC, urinary output, presence of headache, visual disturbances, epigastric pain, uterine contractions and FHR
- Place client on fluid restriction of 100/125 ml per hour
- Monitor for toxicity: absence of deep tendon reflexes, low urine output, respirations less than 12, decreased LOC, cardiac dysrhythmias