RT Journal Article T1 Incidence of Hypersensitivity Reactions During Hemodialysis. A1 Esteras, Raquel A1 Martín-Navarro, Juan A1 Ledesma, Gabriel A1 Fernández-Prado, Raúl A1 Carreño, Gilda A1 Cintra, Melissa A1 Cidraque, Ignacio A1 Sanz, Ignacio A1 Tarragón, Blanca A1 Alexandru, Simona A1 Milla, Mónica A1 Astudillo, Elena A1 Sánchez, Emilio A1 Mas, Sebastian A1 Tejeiro, Rafael Díaz A1 Ortiz, Alberto A1 Sánchez, Rafael A1 González-Parra, Emilio K1 Acute reaction K1 Allergic reaction K1 Dialyzer K1 Hemodialysis K1 Membrane K1 Polynephron K1 Polysulfone AB A recent alert from Spanish health authorities warned of a higher incidence of reported hypersensitivity reactions to hemodialysis membranes with polysulfone, in the 2017 review of acute reactions to dialyzers found only published reports in the 21st century on polysulfone and its derivatives. The aim is to assess/evaluate the current incidence and characteristics of hypersensitivity reactions in hemodialysis patients. A retrospective multicentre study in 9 Spanish hospitals evaluated patients in whom a hypersensitivity reaction required a change in dialyzer membrane. A total of 37 patients out of 1561 (2.37%) had hypersensitivity reactions and clinical, epidemiological and analytical data were available for 33 patients (2.11%). The membranes involved were polysulfone (n=23), polynephron (n=8), polyethersulfone (n=1) and polyacrylonitrile (n=1). This distribution reflected the frequency of use of membranes in the participating dialysis units. The reactions were described as type A in 18 cases and type B in 15 cases. There were no significant differences between the two types in clinical symptoms, the composition of the membrane involved, the method of sterilization, the season, or the time during the session in which they occurred. The most frequent symptom was dyspnea/breathlessness (64% of reactions). Eosinophilia was common (74%). 54% of the reactions occurred within the first 30 minutes of hemodialysis, 64% occurred during the first year of dialysis, and 54% required discontinuation of dialysis session. Cellulose triacetate was used as an alternative dialyzer in 78% of the cases. The incidence of hypersensitivity reactions was in the range found in reports from 20 years ago and is observed associated with synthetic membranes, not just polysulfones. Cellulose triacetate appears to be a good alternative for these patients. YR 2018 FD 2018-09-20 LK http://hdl.handle.net/10668/12969 UL http://hdl.handle.net/10668/12969 LA en DS RISalud RD Apr 10, 2025