Transcranial Doppler1 Flashcards

1
Q

Branches of the ophthalmic artery

A

nasal, frontal, supraorbital

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2
Q

periorbital branches of the ECA

A

Facial, superficial temporal

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3
Q
MCA depth
(transtemporal window)
A

3-6 cm

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4
Q

ACA (A1) mean velocity

transtemporal window

A

50 cm/s

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5
Q

C1/terminal ICA flow direction

transtemporal window

A

antegrade

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6
Q

PCA(P1) depth

transtemporal window

A

6-7.5 cm

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7
Q

PCA(P2) mean velocity

transtemporal window

A

40 cm/s

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8
Q

Basilar artery tip flow direction

transtemporal window

A

bidirectional

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9
Q

MCA mean velocity

transtemporal window

A

55 cm/s

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10
Q

ACA(A1) flow direction

transtemporal window

A

retrograde

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11
Q

C1/terminal ICA depth

transtemporal window

A

6-7 cm

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12
Q

PCA(P1) mean velocity

transtemporal window

A

39 cm/s

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13
Q

PCA(P2) flow direction

A

retrograde

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14
Q

Basilar artery tip depth

transtemporal window

A

7-8 cm

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15
Q

MCA flow direction

transtemporal window

A

antegrade

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16
Q

ACA(A1) depth

transtemporal window

A

6-7.5 cm

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17
Q

C1/terminal ICA mean velocity

transtemporal window

A

39 cm/s

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18
Q

PCA(P1) flow direction

transtemporal window

A

antegrade

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19
Q

PCA(P2) depth

transtemporal window

A

6-6.5 cm

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20
Q

Basilar artery tip mean velocity

transtemporal window

A

40 cm/s

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21
Q

extradural vertebral artery depth

suboccipital window

A

4-5.5 cm

22
Q

intradural vertebral artery mean velocity

suboccipital window

A

38 cm/s

23
Q

basilar artery flow direction

suboccipital window

A

retrograde

24
Q

extradural vertebral artery mean velocity

suboccipital window

A

34 cm/s

25
Q

intradural vertebral artery flow direction

suboccipital window

A

retrograde

26
Q

basilar artery depth

suboccipital window

A

7-11.5 cm

27
Q

extradural vertebral artery flow direction

suboccipital window

A

antegrade

28
Q

intradural vertebral artery depth

suboccipital window

A

6-9.5 cm

29
Q

basilar artery mean velocity

suboccipital window

A

41 cm/s

30
Q

C2/supraclinoid depth

ophthalmic window

A

6.5-8 cm

31
Q

C3/genu mean velocity

A

N/A

32
Q

C4/parasellar flow direction

ophthalmic window

A

antegrade

33
Q

ophthalmic artery depth

ophthalmic window

A

3.5-5.5 cm

34
Q

C2/supraclinoid mean velocity

ophthalmic window

A

41 cm/s

35
Q

C3/genu flow direction

ophthalmic window

A

bidirectional

36
Q

C4/parasellar depth

ophthalmic window

A

6.5-8 cm

37
Q

ophthalmic artery mean velocity

ophthalmic window

A

21 cm/s

38
Q

C2/supraclinoid flow direction

ophthalmic window

A

retrograde

39
Q

C3/genu depth

ophthalmic window

A

6.5 cm

40
Q

C3/parasellar mean velocity

ophthalmic window

A

47 cm/s

41
Q

ophthalmic artery flow direction

ophthalmic window

A

antegrade

42
Q

extradural ICA depth

submandibular window

A

3.5-8 cm

43
Q

extradural ICA mean velocity

submandibular window

A

30 cm/s

44
Q

extradural ICA flow direction

submandibular window

A

retrograde

45
Q

What vessel carries 80% of the cerebral hemisphere’s blood supply?

A

MCA

46
Q

Upper limit of normal for MCA velocities

A

less than or equal to 90 cm/

47
Q

average depth to midline in the skull

A

8 cm

48
Q

name the segments of the cavernous ICA

A

parasellar, genu, supraclinoid

49
Q

cavernous ICA, aka

A

carotid siphon

50
Q

What is the normal resistivity of the ophthalmic artery?

A

high resistance