A practical nurse is caring for a client with end-stage heart failure who is on a low-sodium diet and furosemide 40 mg daily. The client's morning assessment reveals: weight gain of 1.8 kg overnight, JVD at 45°, crackles bilaterally to mid-lung fields, and SpO₂ of 90% on 2L/min nasal cannula. The client is DNR. Which action is the PN's PRIORITY?

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