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CORE random trivia > IR numbers to know > Flashcards

IR numbers to know Flashcards

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1
Q

Aortic arch run

A

20 for 30

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2
Q

Abdominal aorta run

A

20 for 20

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3
Q

renal artery run

A

5 for 10

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4
Q

pulmonary artery run

A

25 for 50

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5
Q

3 French = ______

A

1 mm

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6
Q

1mm is equivalent to how many French?

A

3 Fr

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7
Q

hole created by a sheath is how many French larger than the French of the sheath?

A

2 French larger. sheath Fr measures the INNER diameter only (aka - what catheter will fit through)

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8
Q

1 Fr = _______ mm

A

1 Fr = 0.3 mm

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9
Q

when do you stop Heparin

A

2 hours before

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10
Q

When do you stop Coumadin/INR prior to an IR procedure

A

5-7 days prior, INR > 1.5

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11
Q

ideal platelet count prior to IR procedure

A

> 50 (or > 75)

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12
Q

when do you stop plavix or ASA prior to an IR procedure

A

5 days prior

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13
Q

how many minutes of arterial compression after you pull femoral arterial sheath?

A

15 min

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14
Q

If you need to immediately reverse INR (INR > 1.5). What can you do?

A

Vitamin K; IM 25-50 mg. Or FFP and cryo

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15
Q

how much thrombin should you inject into a pseudoaneurysm

A

500-1000 units

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16
Q

balloon should be what % bigger than the vessel diameter?

A

10-20%

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17
Q

what does a 10 x 6 balloon mean?

A

10 mm in diameter, 6 cm in length

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18
Q

ideal time to remove an IVC filter

A

3 months

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19
Q

mega cava

A

28 mm

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20
Q

> 28 mm IVC

A

megacava

need a birds nest filter (can do this with IVC up to 40 mm)

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21
Q

Carotid doppler:

PSV >230 cm/s

A

>70% stenosis

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22
Q

Carotid doppler:

PSV >125 cm/s

A

50-69% stenosis

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23
Q

Carotid doppler:

PSV <125 cm/s

A

< 50% stenosis

“normal” aka this is not hemodynamically significant

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24
Q

ICA/CCA ratio >4.0

A

>70%

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25
Q

ICA/CCA ratio >2.0

A

50-69%

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26
Q

ICA/CCA ratio <2.0

A

< 50%

27
Q

TIPS stenosis numbers

A

STENOSIS:

  • abormally high or abnormally low; >190 cm/s or < 90 cm/s
  • increase or decrease > 50 cm/s compared to prior
  • MPV low flow <30 cm/s
28
Q

in the renal artery, normal arterial acceleration time

A

< 0.07 s

29
Q
A
30
Q

IMH mortality predictors

A

ascedning aorta > 5 cm

IMH > 2 cm

pericardial effusion

31
Q

IMH strongest predictor of progression to dissection?

A

max aortic diameter > 5cm

32
Q

ideal TIPS pressure gradient

A

< 12 mm Hg

reduced to between 6-8 mm Hg if the indication is intractable ascites

33
Q

serum half life of tPA

A

5 minutes

the drug concentration will fall to a negligible level after about 5 half lives which is after about 25 min

34
Q

after how much time will the serum concentration of tPA fall to a negligible (<5%) level?

A

the drug concentration will fall to a negligible level after about 5 half lives which is after about 25 min

35
Q

after 25 min tPA will be at what serum level?

A

the drug concentration will fall to a negligible level (<5%) after about 5 half lives which is after about 25 min

36
Q

What is the typical wire diameter used to fit trhough a 21 Ga needle?

A

0.018”

37
Q

lowest hemorrhage rate necessary for detection of GI bleeding by catheter angiography?

A

0.5 mL/min

38
Q

lowest hemorrhage rate for detection of a GI bleed on Tc-99m scan

A

0.04 mL/min

ten times more sensitive than angiography

drawback to Tc-99m is not precise anatomic localization

39
Q

normal right atrial heart pressures

A

0-8 mmHg

40
Q

PAVM size criteria for treatment

A

>3 mm or symptomatic (prior infarct or brain abscess)

41
Q

massive hemoptysis definition

A

>300 mL/24 hours

42
Q

celiac artery arises at what vertebral body level

A

T12

43
Q

SMA arises at what vertebral body level?

A

T12-L1

44
Q

Renal arteries arise at what vertebral body level?

A

L1-L2 disc space

45
Q

The IMA arises at what vertebral body level?

A

L2-L3 disc space

46
Q

A bleeding rate of _________________ is generally required to be angiographically positive.

A

A bleeding rate of 0.5 to 1.0 mL/min is generally required to be angiographically positive.

47
Q

A tagged red blood cell scan can detect bleeding rate of ________________.

A

0.2 to 0.4 mL/min.

48
Q

Vasopressin can only be used for _________ before tachyphylaxis (lack of further response) develops

A

24 hours

49
Q

alternative treatment for lower GI bleed (not coiling). Medication and dosing

A

Vasopressin is directly infused into the SMA or IMA.

The dose of vasopressin is 0.2–0.4 units per minute (100 units mixed in 500 mL saline given at 1 mL/minute), given as a continuous infusion for up to 24 hours.

50
Q

Portal hypertension is defined as a portosystemic gradient of:

A

> 5 mmHg

51
Q

volume of contrast for a knee arthrogram?

A

40 mL

52
Q

volume of contrast for a wrist arthrogram?

A

2-3 cc

53
Q

amount of albumin infused for every 1L ascites removed during large volume paracentesis (>5L)?

A

6-8 grams infused per L removed

54
Q

typical maximum volume of pleural fluid removed during thoracentesis to prevent re-expansion pulmonary edema?

A

< 1 - 1.5 L

55
Q

hemodynamically significant arterial gradient?

A

> 10 mmHg

56
Q

hemodynamically significant venous gradient?

A

> 3-5 mmHg

57
Q

high impact

initial f/u scan after microwave ablation for HCC

A

**f/u in 4-6 weeks w/ MR or CT

then…3-6 months

58
Q

goal for activated clotting time for arterial and venous procedures

A

200-300 s

59
Q

MELD score threshold for TIPS

A

<18-20

60
Q

Y-90 half life

A

64 hours

61
Q

Rutherfod stage 4 classification presentation

A

rest pain

62
Q

embolic particle size for bronchial artery embo?

A

big ones so they don’t occlude the Anterior spinal artery - should be 700-900 microns

63
Q

velocity for 70% stenosis in the celiac artery

A

> 200 cm/s

64
Q

velocity in SMA when > 70% stenosis

A

SMA > 275 cm/s

CORE random trivia (13 decks)

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