Cardiac surgery nurses' knowledge of warfarin: evaluation of a training activity

Aims: The aim of this study is to evaluate the effectiveness of the training provided to cardiac surgery nurses regarding warfarin use. Methods: This pre-test-post-test quasi-experimental study was conducted between June and July 2025 at the department of cardiovascular surgery of a university hospital. The sample consisted of 30 nurses working in the clinic and intensive care unit who volunteered to participate in the study. As part of the research, nurses were educated on warfarin use, and their knowledge was measured before and after the training to evaluate the effectiveness of the training. Data were analysed using SPSS 25.0. Descriptive statistics were calculated, and pre- and post-test scores were compared using the Wilcoxon signed-rank test.Results: The average age of the nurses participating in the study was 33.30±6.62 years. The average pre-training knowledge score of nurses regarding warfarin use was 15.00±2.74, while the post-training score increased to 18.03±1.29. The average knowledge score of nurses regarding warfarin-drug interactions before training was 13.40±14.40, while after training it was 41.80±10.43, and the average knowledge score regarding warfarin-food-herb interactions increased from 9.73±5.51 to 24.60±11.05. According to the Wilcoxon signed-rank test results, statistically significant increases were observed in nurses’ knowledge scores regarding warfarin use and, warfarin–drug interactions, and warfarin–food–herb interactions after the training (p