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Clin Med 2 > Obstetric 3 > Flashcards

Obstetric 3 Flashcards

1
Q

pregnancy and radiography

A
  • avoid plain film radiographs in 1st trimester, esp trunk or back
  • abdominal lead shield gives some protection
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2
Q

pregnancy and CT

A

not recommended in any trimester

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3
Q

pregnancy and MRI

A

considered low risk and preferential to CT

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4
Q

pregnancy and dx ultrasound

A
  • commonly used, but video display may increase thermal effects
  • esp in 3rd trimester
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5
Q

dilutional anemia =

A

increased blood volume, even with compensatory increase in EPO and RBCs

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6
Q

EPO/RBC norm for pregnancy:

A

~ 10.5 g/dL

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7
Q

EPO/RBC norm for normal women:

A

~ 12-16 g/dL

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8
Q

chorionic villus sampling used for

A

early detection of genetic disorders

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9
Q

chorionic villus sampling risks

A

1-2% chance of miscarriage

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10
Q

amniocentesis performed when

A

16-18 weeks

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11
Q

amniocentesis risks

A
  • most sources cite 0.5-1% chance of miscarriage

- depends on baby health, timing, high risk pregnancy

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12
Q

What is done in chorionic villus sampling?

A
  • sample of chorionic villi are removed from the placenta for testing
  • taken through cervix or abd wall
  • usu performed at 10-13 weeks
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13
Q

What are chorionic villi?

A
  • wispy projections of placental tissue

- share the baby’s genetic makeup

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14
Q

How is an amniocentesis performed?

A

amniotic fluid removed from uterus for testing or treatment

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15
Q

Why is an amniocentesis performed?

A
  • genetic testing
  • fetal lung testing
  • dx of fetal infection
  • tx
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16
Q

When is amniocentesis used as tx?

A

can accumulate too much fluid and some must be drained

17
Q

precautions with pregnancy and lactation: drugs

A
  • anything that can cross the placental barrier may be harmful to the baby
  • restrictions during lactation
18
Q

What types of restrictions during lactation are there for drugs?

A
  • if allowed, should be taken 30-60 minutes after breastfeeding AND
  • 3-4 hrs before next feed
19
Q

What are the FDA categories in pregnancy?

A 
Category A
Category B
Category C
Category D
Category X
20
Q

Category A pregnancy

A

controlled human studies show no fetal risks

21
Q

Category B pregnancy

A

animal studies show no fetal risks (no human studies available)

22
Q

Category C pregnancy

A
  • no adequate human or animal studies

- risk cannot be ruled out

23
Q

Category D pregnancy

A
  • evidence indicates fetal risk

- benefits thought to outweigh the risks

24
Q

Category X pregnancy

A
  • contraindicated in human pregnancy

- risks outweigh any potential benefits

Clin Med 2 (78 decks)

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