A patient with an ischemic stroke has an oxygen saturation of 88%. What should be done to help this patient?
1. Position the patient on one side.
2. Elevate the head of the bed.
3. Provide low-dose oxygen.
4. Provide high-dose oxygen.
4
Rationale 1: Positioning the patient on one side does not improve O2 saturation.
Rationale 2: Raising the head of the bed assists in keeping the airway open as well as facilitating lung expansion to prevent atelectasis but will not improve oxygen saturation.
Rationale 3: Low-dose oxygen does not provide adequate supplementation to maintain oxygen saturation, especially when it falls below 90%. It is helpful as an adjunct when the saturation is 90%, in order to raise saturation to more appropriate levels.
Rationale 4: High-flow oxygen therapy is indicated when arterial blood gases or O2 saturation is less than 92%. Hypoventilation may cause an elevation in carbon dioxide, which could lead to cerebral vasodilation and further increase ICP.
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