Translated abstract:
Objective: Since 1989, the Hepatitis C-virus (HCV) has been known as the main source of post-transfusion hepatitis. Before the introduction of anti-HCV-blood donor screening, patients who received cardiac surgery in childhood were a known risk group. In this group, patients from Munich showed a prevalence of 15,3 % for infection with HCV. After the introduction of blood-donor screening, the current prevalence was to be assessed and the known risk factors (number of operations, number of transfusions, use of fresh blood) were to be followed.Method: 2 groups of patients were tested for anti-HCV-antibodies in a retrospective study. All patients had received at least one transfusion in the course of cardiac surgery in childhood. Patients in group 1 had received surgery prior to the introduction of blood-donor screening for anti-HCV-antibodies in 1992, patients in group 2 had received transfusions only since 1992. An analysis of risk factors was performed using the Mann-Whitney-U-test.Results: 15,3 % of patients in group 1 were anti-HCV-positive, whereas all patients in group 2 were anti-HCV-negative (p<0,001). Patients in group 1 had had more operations (p<0,02), received more transfusions (p<0,001) and more transfusions per operation (p<0,001) than patients in group 2. Fresh blood transfusions had been used in 64 % of patients in group 1, whereas patients in group 2 had received no fresh blood preparations (p<0,001).Discussion: Since the introduction of anti-HCV-blood donor screening, the prevalence for HCV-infection after cardiac surgery in childhood has dropped significantly (15,3 vs. < 0,5 %) and is now equal to that of the German population in general. In addition to the high efficiency of screening, a significant decrease of transfusion frequency as well as the abandonment of high-risk materials have contributed to this development.