A 7-year old female spayed Standard Poodle presents with weakness and lethargy. A chemistry panel shows a Na+ = 130 mEq/L (142-152 mEq/L), K+ = 6.5 mEq/L (3.9-5.1 mEq/L), BUN 55 mg/dl (8-28 mg/dl), creatinine 1.9 mg/dl (0.5-1.7 mg/dl). The test to run for a definitive diagnosis would be which of the following?
一只7岁雌性已绝育的标准贵宾表现虚弱和嗜睡。生化测试显示Na+ = 130 mEq / L（142-152 mEq / L），K+ = 6.5 mEq / L（3.9-5.1 mEq / L），BUN 55 mg / dl（8-28 mg / dl），CREA 1.9mg / dl（0.5-1.7mg / dl）。 为了确诊是什么疾病应该进行下列哪个测试？
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