82 f hx cva 20 yrs. woke w/ha on top of head that reminded her of previous cva. xport by amb to ed. amb gave no 02, why? ed cat head. neg cva.

Y no oxygen?: Not every medical issue necessarily requires oxygen. Would have been contingent on the examination and judgment of EMS responders at the time.

Oxygen in stroke: Oxygen administration in stroke remains debatable. If the patient is not short of breath or having low oxygen concentration in blood it remains purely a clinical decision. Glad that so far she ruled out for stroke, MRI is usually better for ischemic strokes. Trust the medical team, sometimes we make mistakes, but we always try to help.

Oxygen level normal?: Oxygen can be harmful if it is in excess. If the oxygen saturation is normal or above 94%, there is no need to give oxygen and it is actually harmful.