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
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
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
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
5
Q
Step 3ai
Is there marked reversibility with BD
A
Yes, change in FEV1 greater than 12%
-Asthma
No
-COPD