PRIMARY CARE OBJECTIVE ASSESSMENT
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1. Define the Barker hypothesis. - ANSWER a. Poor placental development has
been linked to preeclampsia, preterm birth, and intrauterine growth restriction
(IUGR), all of which are associated with low birth weight (<2500 grams), and may
play a role in fetal programming of chronic diseases later in life
2. elements of prenatal care. - ANSWER 1. Women who test negative for
hepatitis B surface antigen and are at high risk for hepatitis B infection (e.g.,
health care workers) are candidates for vaccination before and during pregnancy
2. Infants born to women who test positive for hepatitis B surface antigen should
receive both hepatitis B immune globulins (HBIG) and hepatitis B vaccine within
12 hours of birth, followed by two more injections of hepatitis B vaccine in the
first 6 months of life.
3. Discuss confirmation of pregnancy and determination of viability. - ANSWER
a. About 30-40% of all pregnant women will have some bleeding during early
pregnancy (e.g., implantation bleeding),
,i. Test for pregnancy
b. The pregnancy test detects human chorionic gonadotropin (hCG) in the serum
or the urine
c. The use of transvaginal ultrasonography has improved the accuracy of
predicting viability in early pregnancies.
i. 5 weeks' gestation or a mean hCG level of about 1500 IU/L
d. The presence of a gestational sac of 8 mm (mean sac diameter) without a
demonstrable yolk sac, 16 mm without a demonstrable embryo, or the absence of
fetal cardiac motion in an embryo with a crown-rump length of greater than 5 mm
indicates probable embryonic demise
i. Doppler not recommended
4. Discuss the incidence of early pregnancy loss and define the types of
spontaneous abortion - ANSWER a. Spontaneous abortion occurs in 10-15% of
clinically recognizable pregnancies.
b. more than 50% of all conceptions are lost, the majority in the 14 days following
conception.
c. if a live, appropriately growing fetus is present at 8 weeks' gestation, the fetal
loss rate over the next 20 weeks (up to 28 weeks) is in the order of 3%.
5. What are the etiologies of recurrent pregnancy loss? - ANSWER a. Three
successive spontaneous abortions usually occur before a patient is considered to
be a recurrent aborter.
b. Infection
i. Mycoplasma
ii. Listeria toxoplasma
,c. Smoking and alcohol
d. Psychological stress
e. Medical disorders
i. Dm
ii. Hypothyroid
iii. SLE
iv. Age 30> 40>
5. Discuss the management of each type of early pregnancy loss. - ANSWER a.
Threatened abortion
i. Of those in whom a live fetus is present, 94% will produce a live baby
ii. Once a live fetus has been demonstrated to the couple on ultrasonography,
management consists essentially of reassurance
b. Incomplete abortion
i. Once the patient's condition is stable, the remaining products of conception
should be evacuated from the uterus using appropriate pain control.
ii. Pathologic eval and prompt treatment
c. Missed abortion
i. US to confirm
ii. Spontaneous
d. Recurrent abortion
i. Systemic disorder
ii. Lupus anticoagulant
iii. Hysteroscopy
, iv. Chromosome assessment
v. over half of couples with recurrent losses will have normal findings during the
standard evaluation.
vi. congenital abnormalities of the uterus can now be diagnosed using pelvic
ultrasonography
vii. cervical incompetence
1. suture
6. How is gestational age estimated and the EDC calculated? - ANSWER a.
Gestational age should be determined during the first prenatal visit.
b. Estimated date of confinement (EDC) or "due date" may be determined by
adding 9 months and 7 days to the first day of the last menstrual period.
Ultrasonography may also be used to estimate gestational age. Measurement of
fetal crown-rump length between 6 and 11 weeks' gestation can define
gestational age to within 7 days. At 12 to 20 weeks, gestational age can be
determined within 10 days by the average of multiple measurements
7. Describe the physiologic changes associated with each body system during
pregnancy. - ANSWER a. Cardiovascular system
i. The disproportionate increase in plasma volume compared with the red cell
volume results in hemodilution with a decreased hematocrit reading, sometimes
referred to as physiologic anemia of pregnancy.
ii. diastolic pressure decreases more markedly; this reduction begins in the first
trimester,
iii. Pregnancy does not alter central venous pressures.
iv. Pregnancy does not alter central venous pressures.