بررسی ارتباط بین سطح خواب آلودگی ذهنی و تغییرات میزان تنفس و ضربان قلب در بین مراقبین بالینی شب کار

عنوان انگليسی

The Relationship between Subjective Sleepiness and Changes in Breath and Beat Rates among the Clinical Night Workers

خلاصه انگلیسی

Waking up and sleep quality is a critical aspect of safety in night workers (1-3). Shift work usually leads to many problems such as fatigue, high blood pressure, and heart rate and respiratory problems (4). In spite of this, few studies have investigated the Association of subjective sleepiness with changes in breath and beat rates among the night shift workers. This paper is extracted from analyzing the second night data of our previous study based last ethical consideration (5); differences between gathering in the first and second nights is as follows: 1. in second night, shift workers were only in one group, while the in first night, it was conducted in two groups (5); 2. Data gathering in second night was carried out using Karoniska sleepiness scale (KSS) while, in first night, it was done by SSS scale. Its validity and reliability have been proven previously(6,7). Participants had an experience of shift working at least one year. Also, they had no history of long-term medicine consumption or working at night and work shift for two consecutive nights. The questionnaires were completed by the participants at 9:00 pm, 10:30 pm, 12:00 pm, 1:30 am, and 3:00 am. Breathing and beat rates were simultaneously monitored directly at the mentioned times. Figure 1 shows the trend of sleepiness and scaling of changes in the beat rate and breathing rate during the night time. Based on Pearson`s correlation, beat rate had a negative relationship with sleepiness at the beginning of the shift (r=¬-0.24, P=0.033), 1:30 A.M. (r=¬-0.23, P=0.041) and 3:00 A.M. (r=¬-0.33, P=0.003). Also, Spearman`s correlation of breathing rate and sleepiness was negative and significant at the end of the shift (r=¬-0.28, P= 0.012). Findings represented that highest levels of sleepiness is observed at 3:00 am and then at 1:30 am. This result is similar to outcomes of a study which reports that the maximum drowsiness occurs at 2:00, 4:00, and 6:00 am in night shift (1,6,8(; hence, it could be concluded that work shift influences sleeping quality. As mentioned above, table 1and fig.1 illustrate that increasing the sleepiness leads to a reduction in breath and beat rates as first night (5), This fact about the oral temperature in the first night was not approved by another article (9). Some documents concluded that changes in heart rate could be used as an alarm to sleepiness (10) According to the findings, sleepiness can decrease beat and breathe rates, and shift workers especially nurses who are care the patients would be at risk. It seems that shift working needs the special physical and emotional system; thus, the policymakers should pay attention to this and select better staffs for shift working.

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