Transcranial Doppler1

Question 1

Branches of the ophthalmic artery

Answer 1

nasal, frontal, supraorbital

Question 2

periorbital branches of the ECA

Answer 2

Facial, superficial temporal

Question 3

MCA depth
(transtemporal window)

Answer 3

3-6 cm

Question 4

ACA (A1) mean velocity

transtemporal window

Answer 4

50 cm/s

Question 5

C1/terminal ICA flow direction

transtemporal window

Answer 5

antegrade

Question 6

PCA(P1) depth

transtemporal window

Answer 6

6-7.5 cm

Question 7

PCA(P2) mean velocity

transtemporal window

Answer 7

40 cm/s

Question 8

Basilar artery tip flow direction

transtemporal window

Answer 8

bidirectional

Question 9

MCA mean velocity

transtemporal window

Answer 9

55 cm/s

Question 10

ACA(A1) flow direction

transtemporal window

Answer 10

retrograde

Question 11

C1/terminal ICA depth

transtemporal window

Answer 11

6-7 cm

Question 12

PCA(P1) mean velocity

transtemporal window

Answer 12

39 cm/s

Question 13

PCA(P2) flow direction

Answer 13

retrograde

Question 14

Basilar artery tip depth

transtemporal window

Answer 14

7-8 cm

Question 15

MCA flow direction

transtemporal window

Answer 15

antegrade

Question 16

ACA(A1) depth

transtemporal window

Answer 16

6-7.5 cm

Question 17

C1/terminal ICA mean velocity

transtemporal window

Answer 17

39 cm/s

Question 18

PCA(P1) flow direction

transtemporal window

Answer 18

antegrade

Question 19

PCA(P2) depth

transtemporal window

Answer 19

6-6.5 cm

Question 20

Basilar artery tip mean velocity

transtemporal window

Answer 20

40 cm/s

Question 21

extradural vertebral artery depth

suboccipital window

Answer 21

4-5.5 cm

Question 22

intradural vertebral artery mean velocity

suboccipital window

Answer 22

38 cm/s

Question 23

basilar artery flow direction

suboccipital window

Answer 23

retrograde

Question 24

extradural vertebral artery mean velocity

suboccipital window

Answer 24

34 cm/s

Question 25

intradural vertebral artery flow direction | suboccipital window

Answer 25

retrograde

Question 26

basilar artery depth | suboccipital window

Answer 26

7-11.5 cm

Question 27

extradural vertebral artery flow direction | suboccipital window

Answer 27

antegrade

Question 28

intradural vertebral artery depth | suboccipital window

Answer 28

6-9.5 cm

Question 29

basilar artery mean velocity | suboccipital window

Answer 29

41 cm/s

Question 30

C2/supraclinoid depth | ophthalmic window

Answer 30

6.5-8 cm

Question 31

C3/genu mean velocity

Answer 31

N/A

Question 32

C4/parasellar flow direction | ophthalmic window

Answer 32

antegrade

Question 33

ophthalmic artery depth | ophthalmic window

Answer 33

3.5-5.5 cm

Question 34

C2/supraclinoid mean velocity | ophthalmic window

Answer 34

41 cm/s

Question 35

C3/genu flow direction | ophthalmic window

Answer 35

bidirectional

Question 36

C4/parasellar depth | ophthalmic window

Answer 36

6.5-8 cm

Question 37

ophthalmic artery mean velocity | ophthalmic window

Answer 37

21 cm/s

Question 38

C2/supraclinoid flow direction | ophthalmic window

Answer 38

retrograde

Question 39

C3/genu depth | ophthalmic window

Answer 39

6.5 cm

Question 40

C3/parasellar mean velocity | ophthalmic window

Answer 40

47 cm/s

Question 41

ophthalmic artery flow direction | ophthalmic window

Answer 41

antegrade

Question 42

extradural ICA depth | submandibular window

Answer 42

3.5-8 cm

Question 43

extradural ICA mean velocity | submandibular window

Answer 43

30 cm/s

Question 44

extradural ICA flow direction | submandibular window

Answer 44

retrograde

Question 45

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

Answer 45

MCA

Question 46

Upper limit of normal for MCA velocities

Answer 46

less than or equal to 90 cm/

Question 47

average depth to midline in the skull

Answer 47

8 cm

Question 48

name the segments of the cavernous ICA

Answer 48

parasellar, genu, supraclinoid

Question 49

cavernous ICA, aka

Answer 49

carotid siphon

Question 50

What is the normal resistivity of the ophthalmic artery?

Answer 50

high resistance