Final answer:
Initiating an intravenous (IV) line for the administration of fluids should be a priority in the plan of care for a client with sickle cell crisis.
Step-by-step explanation:
The nurse should include initiating an intravenous (IV) line for the administration of fluids as a priority in the plan of care for a client with sickle cell crisis who will be admitted to the nursing unit. During a sickle cell crisis, patients may experience severe pain and dehydration. Intravenous fluids can help hydrate the patient and alleviate their symptoms.