resp measurement 1 Flashcards
What are the four variables we focus on for respiration measures?
- Pressure (sub and supraglottal)
- Airflow
- Volumes
- Timing
In speech, do our muscles engage in reciprocal activation or co-activation?
Co-activation
What 2 variables can a wet spirometer measure?
- Volume
- Flow (somewhat)
What is inductive plethysmography (aka respitrace)? What conditions is this useful for?
- Indirect measurement of lung volumes by movement of lungs
- Stuttering, Parkinson’s, dysarthria, cerebral palsy
How does respitrace work? (3)
- Rib cage and abdominal bands
- Oscillator
- Signal demodulator (splits RC and AB signals)
Formula for pressure?
- P = F/A
- F = force, A = surface area
Do SLPs measure pressure directly or indirectly?
Indirectly
What are the 2 types of pressure measurements?
- Static (steady state pressure level)
- Dynamic (rapid changes in pressure levels, aka speech)
What is the most basic measurement device for static measurements?
U-tube manometer
For u-tube manometers, what kind of fluid is used for high vs low pressures?
- High: mercury
- Low: water
T or F: u-tube manometers are unreliable
False – so reliable that they even calibrate complex electronic devices
When measuring static intraoral pressure, what kind of assumptions are we making about intraoral air pressure and alveolar pressure?
That they are equal (glottis is wide open)
How do we measure static intra-oral pressure using a u-tube?
Blow and maintain 6-10cm H2O of pressure for specified amount of time
What is the purpose of a bleed tube?
Prevents person from using tongue to close off opening / forces them to use continuous lung pressure
Why must the tube be small and unobtrusive?
To avoid perturbation to speech
