Chapter 3 Flashcards
Biological function of respiration
gas exchange
Secondary function of respiration
energy source for the production of speech
Quiet and forced are parts of?
Inspiration
Passive and active are parts of?
Expiration
Quiet inspiration
Inspiration that involves minimal muscular activity, primarily that of the diaphragm (diaphragm is not stressed)
Forced inspiration
Purposeful use of the muscles of inspiration to inhale more deeply (active contraction of the diaphragm)
Passive expiration
Elasticity of muscles restored to the system to neural following inspiration (impacted by gravity)
Active expiration
Use muscular effort to expel more air (active contraction of abdominals)
Characteristics of respiration in infants
Lungs completely fill the thorax, no residual volume, 25 million alveoli, 40-60 breath cycles per minute
Characteristics of respiration in adults
Lungs stretch out to fill the thorax, residual volume, 300 million alveoli, 12-18 breath cycles per minute
How much mL of air do adults fill up per cycle? How much does exercise require?
500 mL (can fill a pint glass) and 20x quiet breathing for exercise
What are the 3 parts of respiataion?
Ventilation, diffusion, perfusion
Ventilation
Movement of air in the respiratory pathway (flow of air in and out)
Diffusion
Pushing gas or air through the alveolar capillary membrane (alveoli and particles in and out)
Perfusion
Migration of gas though a barrier at the level of cell and tissue (blood flow out to the rest of the body)
Spirometer
Measures volume of air that is displaced (cc)
Manometer
Measures pressure (cm/H20)
Atmospheric pressure
Pressure arising from force of gravity on air molecules of atmosphere
Intraoral pressure
Pressure within the mouth (intra-oral and subglottal are same if vocal folds are open)
Sub glottal pressure
Pressure below level of vocal folds (trachea) - the glottis which is the area in between the vocal folds needs to be closed if we want good sub glottal pressure)
Intrapleural pressure
Pressure between visceral (lung) and costal (rib) pleurae
Pulmonic pressure
Pressure within the lungs and specifically in the alveoli
If the who respiratory passageway is open and at rest (unrestricted) than….?
Atmospheric pressure = intraoral pressure = subglottal pressure = alveolar pressure
What happens to the pressure inside the lungs when the diaphran contracts which pulls down and creates more space in the chest/abdoment?
Pressure decreases
What happens to the pressure inside the lungs when the abdominals reduce the space and the diaphragm relaxes and goes up reducing the space of the lungs?
Pressure increases
How does pressure move?
From areas of high pressure to areas of low pressure
What is tidal respiration?
The volume of air exchange in 1 cycle of quiet breathing
What is the average tidal volume for an adult?
500 mL (16 oz)
1700 mL
1700 cc
1700 mL
1.7 L
Minute volume
The volume of air exchange in 1 minute
Inspiratory Reserve Volume
The extra volume of air that can be inhaled after the tidal volume (sip in more air) - 3L
Tidal Volume
The volume of air that we take in during inspiration (quiet breathing in and out) - 0.5 L
Expiratory Reserve Volyme
The volume of air that can be expired following tidal expiration (exhale extra air) - 1L
Residual Volume
The volume of air left over in the lungs after maximum expiration (we can’t access this air) - 1.2 L
Dead Space Air
The volume of air that is in the spaces of the airway passages that do not contain alveoli (air in trachea and nasal cavities)
Inspiratory Capactity
IC = TV + IRV (the maximum inspiratory volume possible after tidal expiration
Vital Capacity
VC = IRV + TV + ERV (the volume of air that can be inhaled following maximum exhalation)
Functional Residual Capacity
FRC= ERV + RV (the volume of air in the body at the end of passive exhalation - everything left over after tidal volume)
Total Lung Capacity
TLC = IRV + TV + ERV + RV (the sum of inspiratory reserve volume, tidal volume expiratory reserve volume, and residual volume– everything)
What decreases with age?
Vital Capacity & lung complice/elacticity
What stays the same with age?
Total lung capacity
What increases with age?
Residual volume
What are the 2 variables affecting breath support for speech?
- Posture/position & 2. muscle strength
Effects of posture on the sitting postiton
Gravity assists breathing as it pulls the diaphragm down to help inspiration and pulls the rib cage down to help expiration
Effects of posute in the supine position
Gravity harms breathing as it pulls the diaphragm toward the spine and up into the chest (smashes lungs down)
How did SLP’s place patients during COVID-19?
Prone position
Effects of muscles of inspiration with decreased function
Lungs do not inflate to the fullest capacity, total lung capacity is decreased, needs to work against gravity
Effects of muscles of expiration with decreased function
Residual volume increases making less space in the lungs for inspiration, prone to respiratory distress and pneumonia
What drives the movement of the vocal folds?
Subglottal pressure
What is the driving pressure of conversational speech?
7 to 10 H20
What creates syllable stress, pitch changes, and vocal intensity?
Small and fast bursts of subglottal pressure (pressure pushes emphasis on different sounds)
What allows for controlled exhalation for sustaining speech production?
Control of the abdominal muscles
% passive respiration
Inhalation = 40% & Expiration = 60%
% respiration for speech
Inhalation = 10% & Expiration + 90%
What is checking action?
When you impede the flow of air of your inflated lungs by the means of the muscles that got it there in the first place (the muscles of inspiration)- This helps maintain constant flow of air through the vocal tract and sustains breath for speech (a short burst of air = poor checking action)
Hypoxia
An absence of enough oxygen in the tissues to sustain bodily functions
Anoxia
More temporary absence of oxygen
Is COPD chronic or acute?
Cronic
Is sinusitis chronic or acute?
Acute
Is tonsillitis chronic or acute?
Acute
Is asthma chronic or acute?
Chronic
Is lung cancer chronic or acute?
Chronic
Is laryngitis chronic or acute?
Acute
Is pneumonia chronic or acute?
Acute
Is sleep apnea chronic or acute?
Chronic
Tracheostomy
The hole that is made with the tube
Tracheotomy
The procedure of putting in the tube
What is a prime example of a patient with hypoxia?
A covid patient needed to get intubated to return back to having enough O2