I’m learning how to read spirometry and found it a bit difficult to understand. The spirometry graph below is supposed to help answer the question, but I can’t figure out why. Could someone help me explain? Is FEV1/FVC = 73% low or high? How do I calculate PEFR from the below spirometry graph?
[Here is the spirometry graph](https://imgur.com/bHlYp4o)
In: Biology
So the answer at its simplest, putnyour hand an inch in front of your face and blow on it. Feel that? Now suck in air instead. Feel that? No? That’s why we can’t suck out the candles.
Why is this? When you blow you are taking the air in your lungs and pressing it through the much narrower space of your lips pursed to blow out the candle so it creates higher pressure. When you suck in, the point that would generate the pressure is actually doing so on the wrong side of your lips.
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