PFT equipment

Question 1

What are the purposes of PFT equipment?

Answer 1

• identification
• quantification
• epidemiological
• post-op risk
• pulmonary disability
• therapeutic effectiveness

Question 2

What does identification mean?

Answer 2

detect disease

Question 3

What does quantification mean?

Answer 3

quantify and determine the reversibility of a disease

Question 4

What does epidemiological mean?

Answer 4

screening that detects disease from environmental or occupational inhalation

Question 5

What does post op risk mean?

Answer 5

test for pulmonary complications that could occur after surgery

Question 6

What does pulmonary disability mean?

Answer 6

determines if pt can go on pulmonary disability (usually through medicare)

Question 7

What does therapeutic effectiveness mean?

Answer 7

select treatment based on disease, give treatment and then measure to see how effective therapy was

Question 8

What is a spirometer?

Answer 8

a device used to measure volume or flow at the airway opening

Question 9

What is volume displacement?

Answer 9

collects exhaled gas and measures displacement of the gas/device

Question 10

What are the three types of volume displacement equipment?

Answer 10

• water seal stead wells
• water seal collins
• dry rolling seal (horizontal)

Question 11

What does the water seal stead wells measure?

Answer 11

volume and time

Question 12

What does the water seal collins measure?

Answer 12

volume and time (most accurate device)

Question 13

What does the dry rolling seal (horizontal) measure?

Answer 13

volume and time

Question 14

What are some flow measurement devices?

Answer 14

• turbinometers
• sonic devices
• peak flow meters
• pneumotachometers

Question 15

What are some examples of the pneumotachometers?

Answer 15

• turbine device
• fleish
• thermal
• ultrasonic
• peak flow meters

Question 16

What is a turbine device?

Answer 16

wright spirometer (gold standard); mechanical (rotating vane)

Question 17

What is the fleish?

Answer 17

pressure differential. better with laminar flow

Question 18

What is thermal?

Answer 18

flow cooled. temperature sensitive. changes resistance with temp

Question 19

What is ultrasonic?

Answer 19

signal disrupted by change in flow. doppler effect

Question 20

Peak flow meters

Answer 20

• repeatability is more important than accuracy
• reproducibility should be within 0.67 L/sec or 40 LPM
• within instrument variability of 0.15 L/sec or 10 LPM
• between instrument variability of 0.3 L/sec or 20 LPM
• choices are high (850 LPM) or low flow (up to 400 LPM). typical is 10 L/sec or 600 LPM

Question 21

What are the pulmonary function principles?

Answer 21

• capacity
• accuracy
• error
• precision
• linearity
• output

Question 22

What does capacity mean?

Answer 22

range or limits of how much it can measure

Question 23

What does accuracy mean?

Answer 23

how close it is to actual

Question 24

What does error mean?

Answer 24

determines accuracy. math difference between measured and reference values

Question 25

What does precision mean?

Answer 25

reproducibility. how precise

Question 26

What does linearity mean?

Answer 26

how accurate it is over an entire range or measurement