中截留量膜是近年来血液透析领域的一项重要研究进展，相比高通量透析膜可显著提高对较大的中分子尿毒症毒素的清除。目前越来越多的临床研究证实其良好的安全性、显著的短期临床疗效(改善炎症、氧化应激、红细胞生成素抵抗、血管钙化等)，并有望改善维持性血液透析患者的长期预后。本文就中截留量膜的命名、理论优势、延展性血液透析的技术参数及其临床应用做一简述。

Medium Cut-Off Membrane has been an important evolution in the field of hemodialysis for the past years. Its advantages are mainly reflected in the significant improvement of the clearance of large medium molecular uremia toxins at the moment, more and more relevant clinical trials are being revolved to verify the clinical feasibility and long-term benefits. The nomenclature and theoretical advantages of medium cut-off membrane, and related technologies of Expanded Hemodialysis as well as its clinical applications were briefly described below.