Aerodynamic analyses of vocal function Flashcards
Which of the following is the most accurate definition of vital capacity?
the maximum quantity of air exhaled after a maximum inhalation
In the US, aerodynamic analyses are often performed along with acoustic analyses as a procedure known as….
Laryngeal function studies
Which of the following is the correct expression of Ohm’s law?
U= P/R
In which of the following populations would we expect the largest measures of vital capacity?
Young adult males
Although measures of vital capacity can vary based on factors including sex, height, and age, in a typical healthy young adult we would expect measures of vital capacity to be within what range?
3-5 liters
Which of the following is an accurate definition of subglottal pressure (Ps)?
The air pressure immediately below the glottis that acts as a force distributed over the inferior surface of the vocal folds.
If a patient was diagnosed with glottal incompetency due to unilateral vocal fold paralysis and which also causes a moderate-to-severe breathy voice quality, which of the following would you predict to be the measurement of their subglottal pressure?
15 cm H2O (too much air- higher number)
If a patient was diagnosed with MTD which also causes a moderate-to-severe rough and strained voice quality, which of the following would you predict to be the measurement of their subglottal pressure (Ps)?
15 cm H20
When measuring phonation threshold pressure (PtP), what prompt is given to the patient to ensure you are measuring the threshold of phonation pressure and not pressure during some other behavior?
Produce sound as soft as possible without whispering.
Which of the following is an accurate description of a pneumotach?
A device which allows for measurement of the drop in air pressure at the point of resistance to airflow.
VC/MPT is the formula for which aerodynamic measurement?
phonation quotient
Which of the following statements would be most likely in a clinical context?
A patient with unilateral VF paralysis exhibits greater transglottal airflow than a normal speaker
Measurements of transglottal airflow are usually measured from what productions of what stimuli?
/pa/ or /pi/
In a healthy, nondysphonic speaker you would expect measure of transglottal airflow rate to be between what levels when producing speech at comfortable pitch and loudness?
200-400 mL/s
Which of the following would be a transglottal airflow measurement most likely associated with vocal fold bowing secondary to PD causing a moderate-to-severe breathy voice quality with reduced loudness?
300 mL/s
Which of the following maximum phonation time (MPT) would you expect from a normal, healthy 30-year-old man?
20 seconds
Which of the following s/z ratio measurement would you expect from an individual with unilateral VF paralysis causing significant glottal insufficiency and a severely breathy voice quality?
1.85
A healthy, nondysphonic, 10-year-old child would be expected to prolong a vowel for at least what amount of time?
10 seconds
Which of the following phonation quotient measures would you expect in a patient with significant bowing and glottal insufficiency secondary to presbylaryngis?
250 mL/s
Which of the following can influence measurements of subglottal pressure and transglottal airflow?
vocal intensity, fundamental frequency, vocal fold lesions, and the presence of vocal hyperfunction
What may cause UVFP (and associated breathy or harsh voice quality) in patients following coronary surgery?
recurrent laryngeal nerve damage
T/F: Hyperfunction would indicate an increase in air (e.g., breathy).
False; decrease in air expected in hyperfunction
Vital capacity (VC) can be measured through ______________.
spirometry
What is a low-tech measure of subglottal pressure?
cup with water, straw, and ruler to measure level (cm) patient can produce bubbles for a sustained amount of time
**normal speaker= 5 cm H20 for 5 secs
T/F: During expiration, the volume of air in the lungs decreases.
True
“Boyle’s Law” describes lung volume decreasing during expiration, and an increase in lung pressure; air will then ________________________.
move from the lungs toward the mouth
T/F: Pneumotach (masks) measure subglottal pressure.
False; they measure transglottal airflow
Phonatory efficiency can be measured using a _____ ratio.
S/Z ratio
T/F: A normal S/Z ratio for non-dysphonic speakers is 1.4 secs.
True
