Multicenter Study on Dialysis Modalities for End-stage Chronic Renal Failure Patients With Heparin-induced Thrombocytopenia

Inclusion Criteria: * Patient, male or female, over 18 years of age. * Patient on dialysis in a hemodialysis unit of the Ramsay Santé group. * Patient with diagnosed heparin induced thrombocytopenia. * Patient whose dialysis sessions benefit from extracorporeal circulation anticoagulation with Orgaran® or its equivalent (Arixtra® or Arganova®). * Patient informed and having signed his written consent to participate in the study. * Affiliated patient or beneficiary of a social security scheme. * Woman of childbearing age with effective contraception, after verification of the absence of active pregnancy (negative pregnancy test) Exclusion Criteria: * Patient whose duration of dialysis is less than 1 month. * Medically unstable or fragile patient. * Patient participating in another clinical study. * Protected patient: adult under guardianship, curatorship or other legal protection, deprived of freedom by judicial or administrative decision. * Pregnant, breastfeeding or parturient women. * Patient hospitalized without consent. * Patient with severe hepatic failure