Final answer:
Orthostatic hypotension from aortocaval compression can be treated by changing the patient's position and relieving the compression.
Step-by-step explanation:
Orthostatic hypotension from aortocaval compression can be treated by relieving the compression. This can be done by changing the patient's position, such as having them lie on their side or leaning forward. Additionally, using a wedge or pillow to elevate the mother's right hip can help to relieve the compression on the inferior vena cava and improve blood flow, therefore increasing blood pressure.