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OB 2 > Fetal Spine > Flashcards

Fetal Spine Flashcards

1
Q

When do the ossification centers in the fetal spine become apparent?

A

16 weeks

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2
Q

Two posterior ossification centers lie in the what?

A

Laminae

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3
Q

Anterior ossification center lies in the what?

A

Vertebral body

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4
Q

In what level of the spine are there wider ossifications?

A

Sacrum

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5
Q

In what plane creates the classic spinal image?

A

Sagittal

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6
Q

Parallel lines of the spine represent what three things?

A
  1. 2 ossification centres
  2. Vertebral body
  3. Posterior arch
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7
Q

At what level can the conus medullaris be seen?

A

2nd and 3rd lumbar

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8
Q

Determination of spine normalcy:

A
  1. Intact dorsal skin
  2. Intact neural canal
  3. Normal shape and location of ossification centres
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9
Q

Imaging of what structure indicates normalcy of spine development?

A

Conus Medullaris

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10
Q

When is the neural tube formed?

A

Third week

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11
Q

What level of the spine encompasses ventral NTD’s?

A

Lower cervical and upper thoracic

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12
Q

Spina bifida covered by skin?

A

Occulta

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13
Q

What findings may be visually seen in closed NTD?

A

Small tuft of hair

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14
Q

Three factors causing NTD’s?

A

Nutritional
Environmental
Genetic

Diabetes mellitus, obesity, folate deficiency

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15
Q

T or F? NTD’s are more common in females

A

TRUE

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16
Q

What kind of twins have a high concordance rate with NTD’s?

A

MZ

17
Q

What abnormality shows splaying of ossification centres in a TRV view of the spine?

A

Spina bifida

18
Q

The normal appearance of what two brain structures can exclude a myelomeningocele?

A

Cerebellum
CM

19
Q

What two sonographic appearances in the first trimester has been associated with caudal regression syndrome?

A

Short CRL
Abnormal yolk sac

20
Q

Where might teratomas develop?

A

Gonads
Umbilical Cord
Placenta
Sacroccocygeal

21
Q

Fetuses with sacrococcygeal teratoma are at risk for developing what two things?

A

CHF
Hydrops

22
Q

What factor increases the risk of caudal regression syndrome 250x?

A

Maternal diabetes

OB 2 (20 decks)

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