FVC question

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Mon

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How fast can FVC drop? My dad had a test late June and it was 110%. Over past week, has slight cough and some fatigue. Mid July was checked at ALS clinic and tongue/mouth examined, all normal. I guess my question would be, does this slight cough sound unrelated to ALS since FVC was normal less than a month ago?
 

lgelb

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It could still be related, since the muscles that get weak are the ones that control clearing mucus when you cough, as well as those that support breathing. Most important is to stay ahead of clearing secretions, a topic on which we have many threads, because coughing can become a long cycle if you are trying to cough up the same gunk over and over.
 
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