It’s inserted through your nose into your larynx so your doctor can see your vocal cords. LaryngoscopyĪ laryngoscope is a flexible tube with a camera attached. During an episode of VCD, it will show a lower amount of air coming in than usual because it’s blocked by your vocal cords. SpirometryĪ spirometer is a device that measures how much air you breathe in and exhale out. To be useful, the tests must be performed while you’re having an episode. There are some tests your doctor might use to diagnose VCD. People with VCD tend to do this unconsciously. Your doctor might notice if you grab your throat or point to it when describing your symptoms. A study showed over 40 percent of people with VCD are misdiagnosed as having asthma. It can be hard to differentiate VCD and asthma.
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