Abstract Background Alarm fatigue, a prevalent issue in medical settings, arises when healthcare professionals are exposed to an overwhelming number of clinical alarms, leading to desensitization and decreased responsiveness. The constant alertness required due to medical device alarms in hospitals can severely disrupt the quality of sleep for medical personnel. This study aims to demonstrate whether there is a relationship between alarm fatigue and sleep quality in medical staff. For the research project, it was decided to carry out the study in three European neighbouring countries: Poland, Slovakia and the Czech Republic Methods The the survey was carried out in three European countries: Poland, Slovakia, and the Czechia from June to July 2023. The study was attended by a total of 756 participants. The study used: a socio-demographic metric; Alarm Fatigue Assessment Questionnaire and The Pittsburgh Sleep Quality Index to evaluates sleep quality. Results Among the 756 survey participants, 603 (79.76%) had poor sleep quality (6-21 PSQI points), 147 (19.44%) had good sleep quality (0-5 PSQI points), and 6 (0.79%) did not answer. The analysis of sleep quality scores for participating countries shows that sleep problems were significantly higher in Slovakia and Poland than in the Czech Republic. Alarm fatigue levels were determined for respondents in every country in this study. The statistical difference between countries is significant. In Slovakia and Poland, the levels of alarm fatigue caused by medical devices were significantly higher than in the Czech Republic. With regards to sleep quality, there is a positive correlation between alarm fatigue and sleep problems. A statistically significant positive correlation was obtained for all three countries. Conclusions The study found that workers in the health system are exposed to alarm fatigue, and that this in turn can reduce sleep quality. The consequences of this may be reflected in patient safety. Key messages • The results of the study clearly indicate that quality of work should be ensured by developing protocols for managing medical device alarms. • Combatting alarm fatigue among medical personnel is vital for public health as it reduces medical errors caused by sleep deprivation.