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MRCOG MedExamExpert > Amnio & CVS > Flashcards

Amnio & CVS Flashcards

1
Q

How many of pregnancies are offered invasive prenatal testing?

A. 1-3%
B. 5%
C. 10%
D. 15%

A

B. 5%

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2
Q

What is the most common invasive prenatal testing offered?

A

AMNIO

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3
Q

When is an amnio performed?

A

BEYOND 15w

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4
Q

What is an early amnio?

A

<15w

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5
Q

When is a CVS performed?

A

11-13+6 weeks

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6
Q

What is the additional risk of miscarriage following amnio and CVS (within time frame)

A

1%

5.9% for amnio

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7
Q

What is the additional risk of miscarriage following CVS after 15w

A

slightly higher than Amnio

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8
Q

What is the risk of miscarriage following amnio before 15w (Early Amnio)

A

7.6% vs 5.9%

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9
Q

What are associated with early amnio?

A

Talipes & resp morbidity.

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10
Q

CVS <10w are associated with:

A

Increased risk of oromandibular limb hypogenesis syndrome.

Increased difficulty (smaller uterus, thinner placenta)

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11
Q

Type of consent prior Amnio/CVS:

A. Written
B. Oral

A

A. Written

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12
Q

What us the maximal outer needle gauge size used in Amnio/CVS?

A

0.9mm (20G)

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13
Q

During Amnio/CVS, what are the principles of passage to remember?

A

Avoid transplacental passage
Avoid cord insertion
LA for transabdominal route

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14
Q

Amnio/CVS in multiple pregnancy:

A

Done by a specialist with selective reduction skills
Miscarriage rates are higher
Single or double puncture sites possible
TWO separate needles in DCDA

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15
Q

Is there an associated increased rate of emergency delivery with T3 amnios?

A

No

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16
Q

What are the complications of T3 amnios?

A

Multiple attempts

Blood stained fluid

17
Q

With regards to invasive prenatal testing, what are the principles of sterility to remember?

A

USG probe in sterile bag
Sterile USG gel
Viral screening done

18
Q

When should Amnio/CVS be done in HIV+ mothers?

A

Consider when there is no detectable viral load

And consider ART is not yet on tx

MRCOG MedExamExpert (4 decks)

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