Spirometry

1
Spirometry Related Testing Equipment

• RET 2414L
• Pulmonary Function Testing
• Module 2.0

2
Spirometry Related Testing Equipment

• Learning Objectives
• Describe at least one volume displacement
  spirometer
• List at least two principles used by flow-sensing
  spirometers to measure volume

3
Spirometry Related Testing Equipment

• Spirometer
• Definition
• Any Device used to measure lung volumes and flows

4
Volume Displacement Spriometers

• Water-Seal Spirometers
• (Collins, Stead-Wells)

5
Volume Displacement Spriometers

• Water-Seal Spirometers
• Bell factor
• Kymograph
• 32,160,1920 mm/min
• ATPS to BTPS
• Potentiometer
• Flow/Volume
• FV Loop

6
Spirometers

• ATPS to BTPS Coversion
• Actual values must be corrected to body
  temperature pressure saturated (BTPS)

7
Volume Displacement Spriometers

• Water-Seal Spirometers
• Problems
• Cracks ? Leaks
• Positioning
• Too high
• Too low
• Infection Control
• Hoses
• Mouth Pieces
• Filters

8
Volume Displacement Spriometers

• Dry Rolling-Seal Spirometers

9
Volume Displacement Spriometers

• Bellows Type Spirometer

10
Flow-Sensing Devices

• Flow-Sensing Spirometers (pneumotachometers)
• Devices that measure gas flow

11
Flow-Sensing Devices

• Turbine (impeller)

12
Flow-Sensing Devices

• Turbine (impeller)
• Wright Spirometer
• VC, VT, VE
• Flows 3-300L/min
• Not used for FVC
• Compact
• Gas sterilized

13
Flow-Sensing Devices

• Pressure Differential Flow Sensors

14
Flow-Sensing Devices

• Pressure Differential
• Flow Sensors
• Fleich (capillary tubes)
• Silverman (screens)
• Heating element to reduce condensation
• Recalibrate after cleaning

15
Flow-Sensing Devices

• Heated-Wire Flow Sensors

16
Spirometry Related Testing Equipment

• Portable Spirometers
• Flow-sensing spirometer interface with a laptop
  computer

17
Spirometry Related Testing Equipment

• Portable Spirometers
• Portable spirometer using plug in cards

18
Spirometry Related Testing Equipment

• Portable Spirometers
• Handheld office spirometers

19
Spirometer Calibration

• 3 Liter Syringe
• Used for volume calibration of volume-based and
  flow-based spirometers
• ATS Standards
• /- 3
• Or /- 0.05 L
• Whichever is greater

20
Spirometry Related Testing Equipment

• Peak Expiratory Flow Meters

21
Spirometry Related Testing Equipment

• Peak Expiratory Flow Meters
• Recommended Ranges
• ATS
• 60-400 L/min (children)
• 100-850 L/min (adults)
• NAEPP
• 100-400 L/min (children)
• 100 700 L/min (adults)

22
Spirometry Related Testing Equipment

• Respiratory Pressure Manometers
• Measures MIP and MEP

23
Spirometry Related Testing Equipment

• MIP

24
Spirometry Related Testing Equipment

• MIP

25
Spirometry Related Testing Equipment

• MIP

26
Spirometry Related Testing Equipment

• MIP