蛋白质能量消耗(protein energy wasting，PEW)在慢性肾脏病患者，尤其是维持性血液透析患者中很常见，影响慢性肾脏病患者的生存率和死亡率、生存质量。PEW主要表现低血清白蛋白和前白蛋白浓度，体质量指数(body mass index，BMI)降低，以及膳食蛋白质摄入量的减少等。因此，早期识别与诊断PEW对慢性肾脏病患者的预后十分重要。

Protein energy wasting (PEW) is a common complication in patients with chronic kidney disease, especially those treated with maintenance hemodialysis. PEW affects their survival, mortality and quality of life. PEW clinically manifests low serum albumin and prealbumin concentrations, reduced body mass index (BMI), and decreased dietary protein intake. Therefore, early identification and diagnosis of PEW is essential for the prognosis of chronic kidney disease patients.