Final answer:
The priority finding when assessing a patient for suspected stroke is aphasia, a loss of language and speech functions, which requires immediate attention and may indicate a severe stroke.
Step-by-step explanation:
When assessing a patient for a suspected stroke, the priority finding the nurse should place is aphasia. Aphasia indicates a loss of language and speech functions, often due to damage to Broca's or Wernicke's areas in the left hemisphere of the brain. Identifying a change in speech, such as difficulty speaking or understanding, is critical because these can be signs of a more severe stroke with potential for significant long-term disability. The FAST mnemonic - Face drooping, Arm weakness, Speech difficulties, Time to call emergency services - is commonly used to help identify stroke symptoms quickly.
In addition to speech changes, a nurse will assess for other neurological deficits such as facial drooping, arm or leg weakness, and changes in the visual field. However, aphasia is often amongst the most immediately recognizable symptoms that could indicate a significant disruption in brain function, thus requiring immediate attention and treatment.