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14 Cards in this Set
- Front
- Back
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4 Minimum Effort Criterium for "choosing" what respiratory muscles to use
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1. Mechanical advantage
2. Assistance or opposition of the environment 3. muscle mass 4. relationship between thoracic volume change and muscle length |
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Spirometry
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measures the volume exchanged between the body and the atmosphere. deep breath in then exhale completely
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FRC
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functional residual capacity
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ERV
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expiratory reserve volume- quantity of air that can still be expired after resting expiration
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REL
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resting expiratory end level
both resting and speech breaths end at this level about 40% VC |
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VC
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vital capacity= ERV+IRV+TV
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qualities of resting respiration
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12-15 cycles per minute
same time to inspire and expire 10% of VC at REL Palv= Patm Palv variations of +- 2cm H20 |
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qualities of speech respiration
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pressure does not vary much over time 10cm H2O
10% insp 90% exp IEL higher for speech 50-70% VC |
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Hooke's Law
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F=ks(change Length)
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Boyle's Law
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P*V=k
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Elasticity of Resp system comes from 4 places...
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1. Costal cartilages
2. tissue that form the lungs 3. connective tissues in the thoracic walls 4. surface tension of the alveoli (most important) |
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TLC
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Total lung capacity= RV+ERV+TV+IRV
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Max Palv pressure at 100% VC
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130 cm H2O
*no less than zero *before a sneeze |
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Min Palv pressure at 0% VC
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-110 cm H2O
*no more than zero *before a hiccup |
