Final answer:
To assess for orthostatic hypotension, a UAP measures blood pressure in multiple positions. This determines how well the cardiovascular system is adjusting to changes in body position.
Step-by-step explanation:
The UAP assesses for orthostatic hypotension by measuring blood pressure while the patient is in different positions: lying, sitting, and standing. This is done to see how the cardiovascular system adjusts and to check for significant changes in blood pressure that might indicate an issue when going from a reclined or seated position to a standing one. Two main reasons for orthostatic hypotension include low blood volume due to dehydration or medications like diuretics, and autonomic failure from conditions like diabetes.