A client has sustained a crush injury to the abdomen as the result of an industrial accident. The initial assessment and interventions have been carried out. The vital signs are stable, and the family is at the bedside. The client is complaining of bilateral flank pain. What is the priority nursing action for this client now?

A. Determining allergies is important but not the immediate priority when flank pain suggests possible internal injury. B. Administering antibiotics is dependent on culture results and not urgent at this stage. C. Obtaining a clean-catch urine specimen helps assess for hematuria or infection, which can indicate kidney or urinary tract injury related to the crush injury. This assessment guides further interventions. D. Preparing for immediate surgery may be necessary if signs of severe internal injury develop, but with stable vitals and no clear indication yet, this is not the immediate priority.