What signs indicate orthostatic intolerance during initial ambulation, and what should you do?

• A. Dizziness, lightheadedness, pallor, or near-syncope; stop ambulation, sit or lie down, and reassess hemodynamic status.
• B. Nausea only; continue ambulation
• C. Headache with no other symptoms; continue ambulation
• D. Excessive sweating; continue ambulation and increase pace

Answer: (A)

Orthostatic intolerance occurs when moving to an upright position causes a drop in blood pressure and reduced blood flow to the brain, leading to symptoms like dizziness, lightheadedness, pallor, or near-syncope. These signs are red flags during initial ambulation because they signal that the body's compensatory mechanisms aren’t keeping up with the shift in blood volume when standing.

When you observe these signs, stop the ambulation right away and have the patient sit or lie down to prevent a fall. Reassess the patient’s hemodynamic status by checking vital signs and monitoring how quickly symptoms resolve. Once the patient is stable, you can plan for a safer progression—allow rests, ensure adequate hydration, and consider a slower return to standing with gradual increases in activity.

Other symptoms like nausea, a headache, or sweating can occur for many reasons and do not alone indicate orthostatic intolerance during initial ambulation, so safety actions should still be guided by the presence of dizziness, pallor, or near-syncope during position changes.