The normal oxygen saturation level is 97–100% (OER #1). Older adults typically have lower oxygen saturation levels than younger adults. For example, someone older than 70 years of age may have an oxygen saturation level of about 95%, which is an acceptable level.

In patients with COPD, baseline saturation of 95% or less is a good screening test for exercise desaturation, especially in patients with DLCO greater than 36%.

MyGovIndia has releases a video on Twitter telling  what to do if baseline saturation falls under 94% or if your fall in saturation before & after the 6-minute walk is 4% or more, contact a hospital & start proning yourself (the technique shown here to increase Oxygen level)

Proning is the process of turning a patient with precise, safe motions from their back onto their abdomen (stomach) so the individual is lying face down.

Below is the Video -

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