Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

CORE Nukes > Nukes pulmonary > Flashcards

Nukes pulmonary Flashcards

1
Q

definition of ventilation defect sizes (as a fraction of segment)

A

small < 25% < moderate < 75% < LARGE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

if you have two moderate defects, what does this equal?

A

2 moderate defects = 1 large defect. smalls do not add up

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

if your perfusion scan is normal, do you need to do the ventilation portion?

A

no. you have excluded a PE.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

a triple match in the lower lobe:

A

intermediate probability

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

triple match in the upper lobe

A

low probability

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

high likelihood ratio # defects

A

>/- large V:Q mismatched segmental defects

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

high likelihood ratio number

A

17

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

effective dose of CTPA

A

21 mSv

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

fetus absorbed dose

A

<1 mGy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

effect dose of perfusion scan only

A

1 mSv

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

effect dose of V/Q scan

A

1.3 mSv

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Fetus absorbed does from a V?Q scan

A

0.4

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

fetus absorbed dose from perfusion scan only

A

0.25

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

breast absorbed dose CTPA

A

44 mGy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

breast absorbed dose for V/Q scan

A

<1 mGy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

which has a higher breast absorbed dose, CTPA or V/Q?

A

CTPA!!! CTPA is 44m Gy and V/Q scan is < 1mGy for breast absorbed dose

17
Q

pt with AIDS

A

PCP pneumonia

PCP is gallium hot, thallium cold

18
Q

Pt with HIV

A

kaposi sarcoma

Tl-201 scan (can see the heart) with uptake in the lungs

19
Q

HIV patient with thallium and gallium avid lesions

A

lymphoma

the only one hot on both thallium and gallium

20
Q

Kaposi thallium and gallium uptake

A

Kaposi is thallium hot and gallium cold

21
Q

PCP thallium and gallium uptake

A

PCP is thallium cold and gallium hot

22
Q

entities that cause V/Q mismatch

A

Vacular

  • PE
  • pulmonary artery atresia (unilateral lung out)
  • vasculitis (multiple small defects)

Space occupying

  • plueral effusion
  • tumor

Scarring

  • fibrosing mediastinitis
  • radiation therapy
23
Q

ddx for decreased perfusion to one lung

A

Vascular

  • Massive PE
  • pulmonary agenesis
  • Swyer-James (vascular pruning once bronchiolitis obliterans has been around long enough)

Massively space occupying

  • Huge pneumothorax
  • Massive effusion
  • Mediastinal fibrosis
  • tumor
24
Q

Metter pearl

a stable preggo patient gets a V/Q scan and the team tells you that they had a radiograph 2 days ago. Is this okay?

A

YES!!!

a radiograph 1-2 days old is okay for a stable patient

25
Q

Metter pearl

an inpatient who is crumping gets a V/Q scan and the team tells you that they had a radiograph 2 days ago. Is this okay?

A

NO!!!

a NEW radiograph is required for an unstable patient

26
Q

Metter pearl

can you interpret a V/Q scan without a chest radiograph?

A

NO!!!

a radiograph within 1-2 days may be okay for a stable patient

a NEW radiograph is required for an unstable patient

27
Q

does a normal perfusion scan exclude pulmonary embolism?

A

abso-fucking-lutely (yes it does exclude a PE)

28
Q

how do you differentiate between segmental pefusion defects caused by airway problems (COPD, asthma, mucus plug) compared with PEs?

A

Airway problems will cause segmental perfusion defects, but they will have an ABNORMAL ventilation scan

PEs will have a NORMAL ventilation scan

29
Q

Mettler pearl

infiltrate on CXR > perfusion defect to same segment

A

pneumonia

versus a PE where the infiltrate < perfusion defect

30
Q

infiltrate on CXR < perfusion defect

A

PE.

as opposed to pneumonia where infiltrate > perfusion defect

31
Q

focal hot spot in the lung

A

due to an injected labeled clot that was dislodged from the end of a central line through where Tc-99m MAA was injected

(or just injected labeled clot from pulling blood back into your syringe)

32
Q

differential for patchy defects on perfusion scan

A

fat emboli

tumor emboli **

vasculitis

inadequate number of particle injected

**(lymphangitis carcinomatosis pattern referred to as contour mapping)

33
Q

Mettler pearl

collection of activity in the central bronchi on ventilation scan

A

COPD

34
Q

Mettler pearl

normal finding in lung transplants

A

poor perfusion to the lung apices

35
Q

when can you see esophageal activity in a ventilation scan

A

only in DTPA scan when it is swallowed instead of inhaled

CORE Nukes (19 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions