LFT Algorithm Flashcards

1
Q

Step 1

Is the FEV1 low

A

Yes
-Move onto step 2

No
-no serious problem but review other readings

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

Step 2

Is the FER below 0.7

A

Yes

  • Obstructive issue
  • Is the TLCO/KCO low

No

  • Restrictive issue
  • Is the TLCO/KCO, RV, FRC low
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Step 3a

Is the TLCO/KCO low

A

Yes

  • COPD with emphysema
  • check if RV and TLC is high

No
-Asthma or COPD without predominant emphysema

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

Step 3b

Is the TLCO/KCO, RV, FRC low

A

Yes
-Intrinsic lung issue, stiff lungs?

No
-Extrinsic lung issue, chest wall, muscle issue

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

Step 3ai

Is there marked reversibility with BD

A

Yes, change in FEV1 greater than 12%
-Asthma

No
-COPD

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