A nurse is caring for a client undergoing hemodialysis who has a history of acute kidney injury due to nephrotoxic antibiotic use. Which nursing intervention should the nurse prioritize to ensure effective hemodialysis and client safety?

Increase dietary potassium intake to compensate for losses during hemodialysis.

Encourage unrestricted fluid intake to prevent dehydration during hemodialysis.

Assess the hemodialysis access site for signs of infection and maturation before each session.

Administer insulin routinely before hemodialysis to reduce fluid retention.