What tests are needed to diagnose asthma?

Is there one specific test for a diagnosis of asthma? In this video I briefly explain what asthma is, which symptoms may suggest it, what is the role of spirometry and some other lung function tests and blood tests your doctor may request to try to determine if your asthma is allergic in nature.
#asthma
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Disclaimers:
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For all viewers/listeners:
The information presented here or in other videos and posts on this channel is not medical advice. These materials reflect general medical knowledge which may not apply to your individual case. If you have health concerns, please see your own doctor or other healthcare provider without delay.
For medical professionals:
You must use your professional judgement when treating your patients. The information presented in this and other videos/posts on this channel is for general medical education only. It may not apply to all patients or clinical scenarios.
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[@jamesduke9809]

This is the best explanation I have ever been told. You are a wonderful teacher. Thank you Doc!

[@lubnashaheen8875]

Thank you so much for making this video. God bless you

[@ruggerplayer6054]

Thank you

[@debvilliers1155]

If you don’t have raised esinophil count does that mean asthma itself is unlikely or just that allergic asthma is less likely