A client with a 6mm calcium oxalate kidney stone in the ureter is experiencing severe flank pain and nausea. The healthcare provider has prescribed conservative management. Which nursing intervention should the nurse prioritize?

For a client with a 6 mm calcium oxalate stone undergoing conservative management, the cornerstone of nursing care is to facilitate spontaneous stone passage while ensuring patient comfort and safety. The following evidence-based interventions should be prioritized:

• Aggressive Hydration: Instruct the client to increase oral fluid intake to achieve a urine output of at least 2.5 liters per day, typically requiring an intake of 3 to 4 liters daily. This high-volume diuresis increases hydrostatic pressure proximal to the stone, aiding propulsion, and dilutes lithogenic solutes to prevent stone growth.
• Pain and Nausea Management: Administer prescribed analgesics, often nonsteroidal anti-inflammatory drugs (NSAIDs) or opioids, and antiemetics promptly. Effective symptom control is essential to maintain the client's ability to tolerate oral hydration.
• Urine Straining and Monitoring: Provide a urine strainer and instruct the client to strain all voided urine to capture the stone for composition analysis. Document the passage of the stone, and monitor urine output and characteristics.
• Activity and Positioning: Encourage ambulation as tolerated. Gravity and movement can assist in the distal migration of the calculus through the ureter.
• Patient Education: Teach the client to recognize signs of complications requiring immediate medical attention, such as intractable pain, fever, chills, or anuria. Educate on dietary modifications to prevent recurrence once the acute episode resolves, including limiting sodium and animal protein intake.

Surgical or urological intervention is reserved for stones that fail to pass after an appropriate trial period, typically 4 to 6 weeks, or in the presence of complications such as obstruction, infection, or refractory pain.