TEST BANK FOR RUPPEL’S MANUAL OF PULMONARY FUNCTION TESTING EXAM 2023

TEST BANK FOR RUPPEL’S MANUAL OF PULMONARY FUNCTION TESTING EXAM 2023 What ratio do we use to determine if a lung disease is obstructive? - CORRECT ANSWER- FEV1 / FVC What are the three obstructive lung diseases? - CORRECT ANSWER- emphysema, chronic bronchitis, and asthma What are the respective pathology of emphysema and bronchitis? - CORRECT ANSWER- In chronic bronchitis your airways are inflamed, and in emphysema you have a destroyed elastic skeleton, thus your lungs are floppy and your airways collapse. how do we ascertain the FEV1? for the FEV1/FVC ratio? - CORRECT ANSWER- the amount of gas exhaled in the first second of a FVC maneuver What is the normal predicted FEV1/ FVC ratio? how do we predict this ratio? - CORRECT ANSWER- predicted FEV1/FVC ratio which will be around 75-80%. You always want to compare what the patient did to what is normal, based on their height, gender, race, and age In obstructive disease what happens to FEV1? and the FEV1/FVC ratio? By what increment must the ratio change to indicate obstructive disease? i.e. what would be obstructive if the predicted ratio is 80% - CORRECT ANSWER- In obstruction your FEV1 will be down and your ratio will be as well. in obstructive lung disease the FEV1/FVC ratio must be less than 10% of the predicted ratio!!! This means that if the predicted ratio is 80%, and 10% of 80 is 8, your FEV1/FVC ratio must be less than 72% to be considered obstruction what is the FEV1/ FRC ratio in restrictive lung disease? what is happening physiologically? Therefore, what test is needed to determine if restriction is present? - CORRECT ANSWER- the lungs are so stiff that you do not get a lot of air into them, so your VC is very small and you are able to get out almost the entire breath in 1 second. Thus, the FEV1/FVC ratio may reach 100%. TLC to determine whether or not restriction is present. Lung volumes are smaller because the lungs are so stiff. If TLC is <80% of predicted then restriction is present. What determines severity of obstructive disease? FEV1/FVC? or FEV1 alone? - CORRECT ANSWER- To find the severity of your patients obstruction you must look at the FEV1 alone what values are used to diagnose asthma? - CORRECT ANSWER- If the patient is obstructed (FEV1/FVC <10% of predicted) and giving them