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Session 2 CM pulm1

CM- pulm -1- Pulmonary Function tests

What are the 3 divisions of the respiratory system airways parenchyma chest
What is diffusion in the lungs air exchange across alveolar capillary membranes
What are PFTs used for evaluate how lungs work -how much air lung can hold -how quickly air moves in and out -how well lungs add o2 and remove co2
Why do we do PFTs diagnose dyspnea/cough or shortness of breath to see if it is obstructive or restrictive problem
When would you order a PFT evaluate s/sx of lung disease assess progression of lung disease monitor tx evaluate preoperative patient screen people at risk for pulm disease
What does spirometry measure measures air movement can determine how much and how fast air can be inhaled and exhaled
What does diffusing capacity measure ability of lung to transfer/exchange gases
what is residual lung volume amount of air left in lung after maximal expiration
What is SVC slow vital capacity- volume of air which can be inhaled or exhaled in a slow steady maneuver
what is FVC forced vital capacity- amount of air that can be exhaled with force after deep inhalation
what is VC vital capacity- the maximum volume of air exhaled during FVC or SVC
What is TLC Total lung capacity- VC + residual volume is the total volume of air at full inhalation
What is ERV expiratory reserve volume- maximum volume of additional air that can be exhaled after a normal exhalation
What is IC inspiratory capacity- max volume of air that can be inspired from tidal volume and expiratory level
What is TV Tidal Volume- air inhaled and exhaled at rest
What is FET forced expiratory time- the time it takes patient to complete FVC maneuver (exhale all air after maximal inspiration)
What is FEV1 forced expiratory volume in 1 second- volume of air forced out in 1 second
What is FEV1/FVC ratio of FEV1 to FVC
on a peak flow volume loop what if PEFR and PIFR Peak expiratory flow rate, and Peak inspiratory flow rate
What are FEF25, 50 and 75 on flow volume loop flow rate at which 25, 50 and 75% of volume has been exhaled
What is DLCO diffusing capacity of lung- measure ability of lungs to transfer carbon mononxide gives a measurment of how well the lungs are working with gas exchange
What are the following values for FVC test normal mild reduction moderate reduction sever reduction normal FVC= 80-120% mild= 70-79 moderate- 50-69 severe- below 50
What would be a normal FEV1 75-80%
What would be a normal fev1/FVC ratio 70%
What would be a normal fef25-75 greater than 50% would be normal
What are the standards for pulm function tests based on age, height, and sex
Can you measure TLC with spirometry NO because you can't measure RV
What would be a normal TLC 80%
How can you measure RV nitrogen washout, helium dilution, body plethysmography
IF you think patient may suffer from asthma but they don't have s/sx currently what can you administer to get a spirometry that would show if they have it or not methacholine, bronchial provocation test
compared to normal flow volume loop what would an obstructive disease look like width would be same but expiratory curve slope would be decreased and flattened
Compared to normal flow volume loop what would a restrictive disease look like narrower loop less volume exchanged but slopes would be steeper
what is a characteristic of a restrictive airway disease decreases lung volume, decreased TLC and FVC but normal or increased FEV1/FVC ratio
What is characteristic of an obstructive airway disease outlow limitation TLC and Lung Volume normal but low FEV1 FEV1/FVC and FEF25-75
What type of airway disease is asthma obstructive
what type of airway disease is COPD obstructive
How do you generally differentiate between COPD and Asthma get a DLCO COPD will have a diminished DLCO asthma will be normal
What type of airway disease is interstitial lung disease restrictive
What type of airway disease is chest bellows diseases restrictive
how do you distinguish between interstitial airway disease and bellows disesases DLCO test- Interstial will have impaired gas exchange, Bellows lungs gas exchange is normal but can't get air in
Created by: smaxsmith