Final answer:
The immediate nursing intervention for a client with pyloric stenosis and fluid and electrolyte imbalance is initiating fluid and electrolyte balance interventions.
Step-by-step explanation:
The immediate nursing intervention for a client with pyloric stenosis and fluid and electrolyte imbalance is initiating fluid and electrolyte balance interventions. Pyloric stenosis is a condition where there is a narrowing of the pylorus, the opening between the stomach and the small intestine. This condition can result in vomiting, dehydration, and electrolyte imbalances. To address these issues, it is important to restore and maintain the client's fluid and electrolyte balance through appropriate interventions, such as intravenous fluid administration and electrolyte replacement as necessary.