تأثیر صدای سفید بر خواب بیماران سالمند بستری در واحد مراقبت کرونری

Objectives: Sleep disorders are prevalent among elderly patients admitted to coronary care units (CCUs).&nbsp;Moreover, the sleep disorders intensify with age-related changes. Thus, this study aimed to determine&nbsp;the effect of white noise on the sleep of elderly patients admitted to CCUs. Methods & Materials: This quasi-experimental research included 40 patients who were admitted to CCU.&nbsp;The sampling was done by convenience sampling method and by following the inclusion criteria. In this&nbsp;study, sleep duration and sleep latency of the patients were measured on the first day of hospital admission&nbsp;and 1 week after hospitalization in CCU in both the control group and experimental group. The&nbsp;experimental group received &ldquo;white noise&rdquo; (ocean sound) for 2 hours each day before bedtime for 1&nbsp;week while the control group received no such noise. The obtained data were analyzed by statistical tests&nbsp;(Chi-squared test, independent t-test, and paired t-test) through SPSS, version 18. Results: The mean (SD) age of the participants was 68.75(6.19) years in the control group and 67.05(5.15)&nbsp;years in the experimental group. Most participants were men (57.5%). In addition, most of them were&nbsp;hospitalized with acute coronary syndrome (80%), and 65% had a history of hospitalization. The mean&nbsp;(SD) sleep duration in the control group was 7.16(0.86) hours before the intervention, which decreased&nbsp;to 4.69&plusmn;0.56 hours after the study. The mean (SD) sleep latency in the control group increased from&nbsp;20&plusmn;5.4 minutes to 28&plusmn;5.4 minutes after the intervention, which shows a significant reduction in sleep&nbsp;quantity after hospitalization (P<0.001). The mean (SD) sleep duration of the experimental group did not&nbsp;show any significant difference with that of the control group [6.75(0.91) h) (P=0.146). Furthermore,&nbsp;after the study, the mean (SD) of sleep duration in the experimental group did not show any significant&nbsp;reduction [7.04(0.91) h) (P=0.12). The sleep latency duration of the older people in the control group&nbsp;decreased from 19 (5.4) minutes to 17 (4.2) minutes (P=0.17). The comparison of sleep duration and&nbsp;sleep latency of both groups after the study indicated a significant difference between 2 groups (P<0.001&nbsp;for both variables). Conclusion: Our results showed that white noise did not significantly change the sleep quality of old patients;&nbsp;however, it prevented the decrease in sleep duration and the increase in sleep latency duration.&nbsp;White noise with regard to its effects on increasing auditory stimulation threshold, its sleep induction, and&nbsp;suitable cost-effectiveness, can be used for some old patients hospitalized in CCUs.