Single Needle Granulocyte and Monocyte Apheresis for Ulcerative Colitis: A Retrospective Safety Analysis.

Introduction: Granulocyte and monocyte apheresis (GMA) is an effective treatment strategy for active ulcerative colitis (UC) in Japan. Single needle (SN) apheresis reduces needle puncture pain in patients because it requires only one puncture site. We evaluated whether single-needle apheresis could be a safe and effective means of reducing patient burden.