PFT Reported data

Question 1

Reported data for FVC?

Answer 1

Report largest FVC and FEV1

• biggest 2 c/in 150ml of each other

Question 2

Reported data for FVLs?

Answer 2

Report largest FVC and FEV1

• biggest 2 c/in 150ml of each other
• same as FVC

Question 3

Reported data for slow vital capacities (SVCs and ICs)

Answer 3

Report largest SVC -> diff b/w 2 largest <150

• 3 good tests
• Report mean of largest 3 for IC (within 150 of each other) -> confirm later

Question 4

Reported data for PEF

Answer 4

3 good tests -> 2 largest c/in 0.67 L/S (FVL) or 40 lpm

Question 5

Reported data for MVV

Answer 5

Predicted = MVV/ [40xFEV1]

• for 12 sec max vent
• report RR and MV (highest)
• Variability <20@ b/w min 2 acceptable

Question 6

Reported data for Pleth

Answer 6

mean value of 3 good tests with <5% variability

• Report (largest-smallest)/Mean
• Raw & SGaw -> effort should be within 10% of each other

Question 7

Reported data for nitrogen washout?

Answer 7

Breath until N2 < 1.5% for >3 breaths

• 1 test -> if >1
• <10% variability and reported mean

Question 8

Reported data for Helium Dilution?

Answer 8

One good test if >1 <10% variability and report mean

• Corrected to BTPS

Question 9

Reported data for DLCO

Answer 9

2 acceptable within 3ml or 10% of highest reported mean

• 4 min b/w tests (10 min if emphysema)

Question 10

How do you calculate reversibility?

Answer 10

% improve = (pre-post)/pre x 100

• > 12% and >200ml increase in FEV1 or FVC (significant)

Question 11

How is Body Plethysmography reported?

Answer 11

Report mean of 3 (within 5%) => (largest-smallest)/mean

• SGaw and Raw shoudl be within 10% of acceptable

Question 12

Determining repeatability of Pleth

Answer 12

largest FRC - smallest FRC / mean

Question 13

Reported data for MIP and MEP?

Answer 13

Max MIP and MEP reported

Question 14

PEF reported data?

Answer 14

Largest PEF reported