Aim: This study aims to investigate the effect of eye mask and earplug applications on sleep quality in patients hospitalized in the Coronary Intensive Care Unit.

Material and Methods: The study was conducted between November 2018 and March 2019 and is a randomized controlled trial designed in a pretest-posttest model. Power analysis was performed to determine the number of participants. With power analysis, 30 patients were assigned to the experimental group and 30 to the control group. Therefore, the study was carried out with 60 patients. Patient Information Form and Richards-Campbell Sleep Scale were used in the data collection. Independent sample t-test, Mann Whitney U test, and paired t-test were used for analysis.

Results: The experimental group's mean pre-test sleep quality score was 197.83±113.614, and the mean post-test score was 385.67±64.08. The control group's mean pre-test sleep quality score was 178.83±116.890, and the mean post-test score was 244.33±122.94. A statistically significant difference was found between the pre-test/post-test sleep quality scores of patients in the experimental group (t=-9.335, p=0.000) and the pre-test/posttest sleep quality scores of patients in the control group (t=-2.730, p=0.011). Considering the post-test sleep quality median values of the experimental and control group patients, a statistically significant difference was determined between the groups (Z=- 4.675, p=0.000).

Conclusion: It was determined that using eye mask and earplug applications positively affected sleep quality in patients hospitalized in the Coronary Intensive Care Unit.