Final answer:
The assessment finding that warrants immediate intervention by the nurse in the scenario of a client with Alzheimer's disease falling in the bathroom is head trauma or injury.
Step-by-step explanation:
In this scenario, a client with Alzheimer's disease falls in the bathroom, and the nurse completes a fall follow-up assessment. The assessment finding that warrants immediate intervention by the nurse is the presence of head trauma or injury. Head trauma can be a serious condition that requires immediate medical attention. The nurse should assess for signs of a concussion, such as loss of consciousness, confusion, dizziness, or vomiting. If any of these signs are present, the nurse should notify the healthcare provider and initiate appropriate interventions.