Earliest indication of hypoxia is (LQ)
|B||Change in pulse rate|
Change in pulse rate
At saturation > 80% there is stimulation of sympathetic system causing tachycardia and increased cardia, output to compensate. Between 60-80% there is reflex tachycardia in response to vasodilation produced hypoxia but below 60% there is bradycardia and direct depression of myocardium.