Term
| What are the indications for PFT? |
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Definition
Detection and qualification of respiratory disease
Assessment of disease progression, response to bronchodilatory tx and/or surgery
Screen preoperative patients to determine the risks and probable complications of surgery |
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Term
| What are the three different methods typically used in PFT? |
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Definition
spirometry
Gas dilution
Body plethymography |
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Term
| What is spirometry and what does it measure? |
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Definition
Technique: max inhalation followed by max exhalation
Measures air volumes and time |
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Term
What are the most common used PFT values?
What do these values measure? |
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Definition
Most common PFT values: FEV, FVC, and FEV/FVC
FEV, FVC, and FEV/FVC represent the degree of airway patency (openess) during expiration
Degree of patency affects airflow in and out of the lung |
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Term
| When using spriometry for PFT what helps to dx whether the issue is restrictive or obstructive? |
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Definition
| I believe the force that the air comes out with and the volume of that air (notes a little fuzzy on this one) |
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Term
| FVC stands for what and means what? |
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Definition
Force Vital Capacity
Max vol of air that can be expired forcefully and quickly following max inspiration
FVC= IRV + TV + ERV |
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Term
FRC stands for what and means what?
what tool can be used to get this value? |
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Definition
Functional residual capacity
Volume of air remaining in the lungs at the end of normal expiration
BOdy plethysmography
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Term
What is the use of FRC?
What does it mean if FRC is increase or decreased? |
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Definition
helps to differentiate between obstructive and restrictiv respiratory patterns
Increased FRC: indicates an obstructive respiratory pattern
Decrease FRC: indicates a restrictive respiratory pattern
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Term
| FEV stands for what and means what? |
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Definition
Forced expiratory Volume Timed:
The volume of air expired over a given interval during the performance of and Forced Vital Capacity
usually one sec
3 sec FEV=FVC
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Term
| What is the most common screening test for obstructive airway disease? |
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Definition
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Term
| FEV% stands for what and means what? |
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Definition
The percent of FVC that can be expired over a given time interval, usually 1 sec
this is a better screening tool of obstructive and restrictive disorders than FEV alone |
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Term
| PEFR stands for what and means what? |
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Definition
Peak Expiratory Flow Rate
The max flow rate attainable at any time during FEV
can assist with diagnosing obstructive disorders such as asthma |
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Term
| what vol of air can a health person exhale in 1 sec and 3 sec respectively? |
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Definition
1 sec: 75% of VC
almost all in 3 sec |
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Term
| What is FEV1 used for most? |
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Definition
| Widely used to detect early obstructvie disease of smaller airways in asymptomatic patients whose other spirometry tests are normal |
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Term
| if someone has a restrictive disorder what will be the finding of the PFT? |
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Definition
Reduced inspiratory and VC
Reduced total lung capacity |
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Term
| In a obstructive disorder what will be the findings? |
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Definition
increase RV and FRV as they are unable to empty lungs completely
May have increase TLC due to alevlar destruction |
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