• Journal of Korean Academy of Nursing
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• v.28 no.3
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• pp.563-572
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• 1998

The purpose of study was to develop and validate Korean Sleep Scale A which can be easily administrated by nurses for a wide range of adult subjects. Dimensions of sleep concept were derived by literature review. Previously developed sleep sclaes were also analyzed in order to develop scale items. The Korean sleep scale A was structured as a 15 item, 4 point likert type scale. The Scale was tested an 298 female and male adult subjects after pilottest and content validation. The results showed reliability by internal consistency of Cronbach's α=.75 Construct validity was tested by factor analysis and known group technique. Factor analysis showed 4 factors-sleep pattern, sleep evaluation, sleep result, and cause of sleep disturbance. These four factors explained 55.9% of total variance. Correlations between factors ranged from .15-.32. There was correlation among Korean Sleep ScaleA score, Verran and Snyder-Halpern(VSH) Sleep Scale score, and sleep satisfaction scale score, r=.71(p=.00), r=.51(p=.03), respectively, These study results partially support reliability, construct validity, and criterion related validity of Korean Sleep Scale A. Further validation study is required with other subjects and other settings.

• Sleep Medicine and Psychophysiology
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• v.11 no.1
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• pp.10-16
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• 2004

Sleep is associated with definite changes in respiratory function in normal human beings. During sleep, there is loss of voluntary control of breathing and a decrease in the usual ventilatory response to both low oxygen and high carbon dioxide levels. Especially, rapid eye movement (REM) sleep is a distinct neurophysiological state associated with significant changes in breathing pattern and ventilatory control as compared with both wakefulness and non-rapid eye movement (NREM) sleep. REM sleep is characterized by erratic, shallow breathing with irregularities both in amplitude and frequency owing to marked reduction in intercostal and upper airway muscle activity. These blunted ventilatory responses during sleep are clinically important. They permit marked hypoxemia that occurs during REM sleep in patients with lung or chest wall disease. In addition, sleep-disordered breathing (SDB) is more frequent and longer and hypoventilation is more pronounced during REM sleep. Although apneic episodes are most frequent and severe during REM sleep, most adults spend less than 20 to 25% of total sleep time in REM sleep. It is, therefore, possible for patients to have frequent apneas and hypopneas during REM sleep and still have a normal apnea-hypopnea index if the event-rich REM periods are diluted by event-poor periods of NREM sleep. In this review, we address respiratory physiology according to sleep stage, and the clinical implications of SDB and hypoventilation aggravated during REM sleep.

• Korean Journal of Clinical Laboratory Science
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• v.53 no.4
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• pp.333-341
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• 2021

Benzodiazepines (BDZs) drugs act on the GABA_A receptor, function as nerve suppressors, and are used to treat anxiety, insomnia, and panic disorder. We analyzed the data of 30 individuals to determine any differences in the sleep-electroencephalogram findings among individuals varying in age, benzodiazepine use, and duration of benzodiazepine use. Comparisons between users and non-users of benzodiazepines, short-term and long-term users, older and younger users, and older short-term and older long-term users, were achieved using electroencephalographic findings obtained through polysomnography. The parameters evaluated included sleep latency, sleep efficiency, sleep-stage percentages, number of sleep spindles, and average frequency of sleep-spindle. The difference between benzodiazepine users and non-users was significant with respect to sleep-stage percentages and average frequency of sleep-spindle. Older and younger users differed significantly with respect to sleep efficiency and sleep-stage percentages, whereas significant difference for sleep efficiency was obtained between long-term and short-term users. Taken together, our results indicate that BDZ consumption suppresses slow-wave sleep and increases the frequency of sleep spindles.

• Journal of Korean Academy of Nursing
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• v.38 no.4
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• pp.573-581
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• 2008

Purpose: The purpose of this study was to investigate the relationships among quality of sleep, depression, late-life function and disability in community-dwelling older women with urinary incontinence. Methods: A stratified random sampling method was conducted to recruit participants from May 10 to August 17, 2007. Data were collected by questionnaires, which were constructed to include lower urinary tract symptoms, quality of sleep, depression, and late-life function and disability in 128 community-dwelling older women. Results: The major findings of this study were as follow: 1) 56.3% of participants belonged to urinary incontinence group. 2) There were significant relationships between depression and sleep latency, sleep duration, daytime dysfunction, quality of sleep, function component, frequency dimension, and limitation dimension. 3) Depression was significantly associated with frequency dimension, limitation dimension in capability which explained 44% of variance in depression. Conclusion: These results may contribute to a better understanding of sleep quality, depression, late-life function and disability in the community-dwelling older women with urinary incontinence. Therefore, health programs for prompting older women's health should be planned based on results of the study.

• Animal cells and systems
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• v.6 no.3
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• pp.239-245
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• 2002

Plasma melatonin, thyroid-stimulating hormone (TSH) and body temperature were measured simultaneously and continuously before and after the sleep-wake cycle was shifted in 4 healthy males and changes in the circadian rhythm itself and in the phase relationship among these circadian rhythms were determined. Normal sleep-wake cycle (sleep hours: 2300-0700) was delayed by 10 h (sleep hours: 0900-1700) during the experiment. Even after this shift the typical melatonin rhythm was maintained: low during daytime and high during night. The melatonin rhythm was gradually delayed day by day. The TSH rhythm was also maintained fundamentally during 3 consecutive days of altered sleep-wake cycle. The phase was also delayed gradually but remarkably. The daily rhythm of body temperature was changed by the alteration of sleep-wake cycle. The body temperature began to decrease at the similar clock time as in the control but the decline during night awake period was less steep and the lowered body temperature persisted during sleep. The hormonal profiles during the days of shifted sleep/wake cycle suggest that plasma melatonin and TSH rhythms are basically regulated by an endogenous biological clock. The parallel phase shift of melatonin and TSH upon the change in sleep-wake cycle suggests that a common unitary pacemaker probably regulates these two rhythms. The reversal phase relationship between body temperature and melatonin suggests that melatonin may have a hypothermic effect on body temperature. The altered body temperature rhythm suggests that the awake status during night may inhibit the circadian decrease in body temperature and that sleep sustains the lowered body temperature. It is probable but uncertain that there ave causal relationships among sleep, melatonin, TSH, and body temperature.

• Korean Journal of Adult Nursing
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• v.23 no.6
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• pp.615-623
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• 2011

Purpose: The purpose of this study was to identify the effects of aromatherapy on sleep disorders, satisfaction of sleep and fatigue in hemodialysis patients. Methods: The study design was a quasi-experimental study with nonequivalent control group pretest-posttest design. The subjects were assigned an experimental group (N=17) and a control group (N=17). The experimental group had inhaled lavender and sweet orange for 2 minutes three times a day for 7 days. Sleep disorders were measured using Sleep Measuring Instrument and satisfaction of sleep was gauged using Visual Analogue Scale. Fatigue was checked using Fatigue Measuring instrument. Collected data were analyzed by ${\chi}^2$-test, t-test, Fisher's exact test, and paired t-test using SPSS/WIN 17.0 program. Results: There are significant differences in the sleep disorders, satisfactions of sleep and fatigue between experimental group and control group. Conclusion: Aromatherapy reduced the sleep disorders and the fatigue and increased satisfactions of sleep in hemodialysis patients. Based on the results of this study, aromatherapy can be used at the any setting as a safe and effective independent nursing intervention to sleep disorders and fatigue in hemodialysis patients.

• Perspectives in Nursing Science
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• v.8 no.1
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• pp.42-53
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• 2011

Purpose: This study was conducted to investigate the effects of aroma hand massage on anxiety and sleep in cancer patients during hospitalization. Methods: This study used a pre-post non-synchronized quasi-experimental design. Data were collected from 66 participating patients from July to December 2008. The participants were divided into an aroma massage group (n=25), a hand massage group (n=15), and a control group (n=26). The experimental group received aroma hand massage using 1% diluted lavender aroma oil once per day for 3 days. The massage was given by the researcher following the Korea Aromatherapy Health Professional Association massage protocol In contrast control group A received only a hand massage. The state anxiety, sleep condition, sleep satisfaction levels, and sleep duration were measured before and after the intervention trial. Results: The aroma hand massage group experienced in a significant decrease in their state anxiety (F=7.658 p=.001). Moreover, there was a significant increase in their sleep condition (F=18.047, p=.001), sleep satisfaction (F=30.016, p=.001) and sleep duration (F=23.019, p=.001) compared to the other groups according to one-way ANOVA and Scheffe's multiple comparison test. Also, noted was a significant increase in the sleep condition of the hand massage group as in the aroma hand massage group according to the Scheffe test. Conclusion: The study findings indicates that aroma hand massage decreases anxiety and increases the sleep condition, sleep satisfaction, and sleep duration of cancer patients.

• Proceedings of the ESK Conference
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• 1992.10a
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• pp.96-103
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• 1992

To get a comfortable sleep, the most improtant thing is how well we do thermorgulate during the rest in bed before sleeping as well as during sleep. In other works, the ambient temperature of the sleeping room is very improtant in the organization of human sleep. In recent years, the effect of ambient temperature on human sleep has been increasingly stueided. These studies were primarily concerned with the relation between thermorgulatory processes and sleep, and more precisely with the findings that various thermoregulatory processes are inactivated or severly curtailed during REM sleep in a number of animals, also that panting and shivering in heat and cold, respectively, cease during REM sleep in cats. Haskel et al. noted that although REM sleep latency was increased at thigh and low temperature. REM sleep was depressed to a greater extent by lower than by higher temperatures whereas the reverse was obseved for SWS. It has also been found that a load omposed upon thermoregulatory mechanisms should markedly affect sleep processes, and that conversely, sleep in conditions of thermic stress should interfere with adequate thermorgulatory reactions. Sleep in an animala under thermic stress is, on the whole, both shorter and less deep than under normal thermic conditions.

• Journal of Korean Biological Nursing Science
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• v.18 no.4
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• pp.203-212
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• 2016

Purpose: The purpose of this study was to identify the sleep patterns of nursing students using self-report questionnaire and physiologic measurement, to examine the factors influencing sleep patterns in based on Spielman's model. Methods: Participants were 119 nursing students who were in the clinical practice period. Self-report questionnaires and actigraphy were used to collect the data. Data were analyzed using descriptive statistics, correlation and regression by the SPSS/WIN 21.0 programs. Results: When sleep was measured by self-report questionnaire, 84 students (70.6%) showed poor sleep quality. The mean sleep efficiency was 82.6%, and 67 students(56.3%) showed low sleep efficiency (less than 85.0%). The factors affecting subjective sleep pattern measured by KMLSEQ were circadian sleep type (${\beta}=.28$, ${\rho}=.003$) and alcohol (${\beta}=.20$, ${\rho}=.031$). The factors affecting total sleep time were sedentary behavior (${\beta}=-.27$, ${\rho}=.003$) and daytime sleepiness (${\beta}=-.33$, ${\rho}$<.001). Conclusion: Many nursing students in their clinical practice period expressed sleep disturbance. Factors affecting the perceived sleep measured by the self-report questionnaire and objective sleep evaluated by physiologic measures were different. The evening type of students perceived poor sleep quality, however, sedentary life style and daytime sleepiness resulted in short sleep time. Therefore, more studies measuring the objective sleep characteristics are needed using subjective and objective characteristics.

• Journal of Korean Academy of Nursing
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• v.41 no.4
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• pp.460-470
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• 2011

Purpose: The aim of this study was to develop and test an explanatory model for sleep disorders in people with cancer. A hypothetical model was constructed on the basis of a review of previous studies, literature, and sleep models, and 10 latent variables were used to construct a hypothetical model. Methods: Data were collected from April 19 to June 25, 2010, using self-report questionnaires. The sample was 291 outpatients with cancer who visited the oncology cancer center at a university hospital. Collected data were analyzed using SPSS Win 15.0 program for descriptive statistics and correlation analysis and AMOS 7.0 program for covariance structural analysis. Results: It appeared that overall fit index was good as ${\chi}^2/df=1.162$, GFI=.969, AGFI=.944, SRMR=.052, NFI=.881, NNFI=.969, CFI=.980, RMSEA=.024, CN=337 in the modified model. The explanatory power of this model for sleep disorders in people with cancer was 62%. Further, sleep disorders were influenced directly by cancer symptom experience, dysfunctional beliefs and attitudes about sleep, and past sleep pattern. Conclusion: Findings suggest that nurses should assess past sleep pattern and consider the development of a comprehensive nursing intervention program to minimize the cancer symptom experience, dysfunctional beliefs and attitudes about sleep, and thus, reduce sleep disorders in people with cancer.