Alteraciones en el sueño por el consumo de cannabis / Sleep disturbances from the use of cannabis

RESUMEN Esta es una revisión de algunos ensayos clínicos realizados acerca de las repercusiones en la estructura, arquitectura y percepción del sueño en los consumidores de cannabis. Para la búsqueda bibliográfica se consultó bases de datos, con especial énfasis en revisiones sistemáticas, metaanálisis, estudios de cohortes, ensayos controlados aleatorios y estudios de casos y controles. Las palabras claves incluyeron términos que describen el uso del cannabis combinado con otros que se refieren al sueño o anormalidades del sueño (por ejemplo: sueño, insomnio, polisomnografía, tiempo total de sueño, latencia del sueño, sueño de onda lenta, sueño de movimiento ocular rápido y su latencia). Se extrajeron datos relevantes de cada uno de los artículos consultados. Se resumió la literatura disponible sobre mediciones subjetivas y objetivas, correlaciones clínicas y paraclínicas, diferencias entre el consumo agudo, crónico y la abstinencia, y otros puntos de discusión. Se realizaron varias correlaciones moleculares y anatómicas que explican los cambios en el sueño desde el punto de vista del sistema nervioso central. Finalmente, los resultados demuestran una disminución de la latencia del sueño con el uso agudo a dosis bajas, además menor tiempo de vigilia luego del inicio del sueño, aumento del sueño de ondas lentas y disminución del sueño de movimientos oculares rápidos; estos efectos no permanecen con el uso crónico, ya que posteriormente se presenta una peor calidad del sueño; el escenario también varía con la abstinencia, puede presentarse insomnio, disminución del tiempo total del sueño de onda lenta y del sueño total.

ABSTRACT This is a review of some clinical trials conducted on the impact on sleep structure, architecture and perception in cannabis users. For the literature search, consult database queries with special emphasis on systematic reviews, meta-analyzes, cohort studies, randomized controlled trials, and case-control studies. Keywords include terms that describe cannabis use combined with others that specify sleep or sleep abnormalities (for example: sleep, insomnia, polysomnography, total sleep time, sleep latency, slow wave sleep, motion sleep fast eyepiece and its latency). Relevant data was extracted in each of the articles consulted. The available literature is summarized on: subjective and objective measurements, clinical and paraclinical correlations, differences between acute and chronic consumption and abstinence, and other points of discussion. Tese are various molecular and anatomical correlations that explain changes in sleep from the point of view of the central nervous system. Finally, results frequently decrease sleep latency with acute use at low doses, plus shorter waking time after sleep onset, increased slow wave sleep and decreased rapid eye movement sleep, these effects do not persist with chronic use since later there is a worse quality of sleep; The setting also changes with abstinence where insomnia may occur, decreased total time for slow wave sleep and total sleep.

Síndrome da apneia e hipopneia obstrutiva do sono e principais comorbidades associadas / Obstructive sleep apnea-hypopnea syndrome and main associated comorbidities

O estudo pretendeu avaliar a fisiopatologia correlacionada, as diferenças de sexo e as comorbidades associadas à síndrome da apneia e hipopneia obstrutiva do sono. Trata-se de uma revisão de literatura realizada a partir dos dados obtidos pesquisas com as palavras-chaves "Síndrome de Apneia e Hipopneia do Sono", "Fisiopatologia", "Fatores de Risco", "Comorbidades e Sexo" nas plataformas digitais SciELO, PubMed, DESC Bireme e Google Acadêmico no período de 2008 a 2018. O sono é dividido em sono Rapid Eye Movement e sono Non-Rapid Eye Movement. A síndrome da apneia e hipopneia do sono é observada pelo ronco e caracterizada pela obstrução total (apneia) ou parcial (hipopneia) das vias aéreas superiores, que leva ao colapso e à dessaturação da oxi-hemoglobina e, consequentemente, causa hipóxia. Os índices de apneia e hipopneia são diagnosticados pela polissonografia e classificam o distúrbio em leve, moderado ou grave. A síndrome da apneia e hipopneia do sono apresenta-se frequentemente associada à obesidade e a doenças cardiovasculares, sendo principalmente observada em homens. A síndrome é considerada um problema de saúde pública mundial e envolve uma equipe multidisciplinar para o tratamento farmacológico ou não farmacológico. Dentre as principais comorbidades verificadas estão obesidade, hipertensão, arritmias e diabetes Mellitus tipo 2.

To evaluate correlated pathophysiologies, sex differences, and comorbidities associated with Obstructive Sleep Apnea-Hypopnea Syndrome. This is a literature review based on data obtained in SciELO, PubMed, DESC Bireme, and Google Scholar in the period between 2008 and 2018, using the following keywords: "Sleep Apnea and Hypopnea Syndrome", "Pathophysiology", "Risk Factors", "Comorbidities and Sex". Sleep is divided into Rapid Eye Movement sleep and Non- Rapid Eye Movement sleep. Obstructive Sleep Apnea-Hypopnea Syndrome is characterized by the total (apnea) or partial (hypopnea) obstruction of the upper airways, which results in snoring and leads to the collapse and desaturation of oxyhemoglobin, causing hypoxia. Apnea and hypopnea indexes are diagnosed by polysomnography and classified as mild, moderate, and severe. ApneaHypopnea Syndrome is often associated with obesity and cardiovascular diseases, and it is mainly observed in men. Apnea-Hypopnea Syndrome is a global public health problem, involving a multidisciplinary team for pharmacological or non-pharmacological treatment. Among the main comorbidities observed are: obesity, hypertension, arrhythmias, and type 2 diabetes Mellitus

Effective Continuous Positive Airway Pressure Changes Related to Sleep Stage and Body Position in Obstructive Sleep Apnea during Upward and Downward Titration: An Experimental Study

Factores asociados con somnolencia diurna excesiva en estudiantes de Medicina de una institución de educación superior de Bucaramanga / Factors Associated with Excessive Daytime Sleepiness in Medical Students of a Higher Education Institution of Bucaramanga

RESUMEN Introducción: La somnolencia diurna excesiva (SDE) puede llegar a interferir en el desempeño académico y profesional, debido a que las personas afectadas tienden a quedarse dormidas en situaciones que exigen un alto nivel de atención. Los estudiantes de Medicina representan una población en riesgo de SDE, dada la exigencia académica de numerosas horas de estudio, debido al gran número de créditos por asignatura contenidos en el plan de estudios del programa académico, las prácticas docentes asistenciales y los turnos nocturnos, que pueden generar privación o déficit acumulado del sueño. Por esta razón, es importante estimar la prevalencia de SDE y los factores asociados en estudiantes de Medicina de una institución de educación superior (IES) de Bucaramanga, con el objetivo de implementar estrategias de prevención primaria que disminuyan la presentación de este problema y mejoren la calidad de vida y el desempeño académico de los estudiantes. Material y métodos: Estudio transversal analítico observacional, con una muestra poblacional de 458 estudiantes de Medicina matriculados en el segundo semestre de 2015 en la Universidad Autónoma de Bucaramanga (UNAB), quienes respondieron a 4 cuestionarios: variables sociodemográficas, escala de somnolencia de Epworth, índice de calidad del sueño de Pittsburg (ICSP) e índice de higiene del sueño (IHS). Se realizó el análisis bivariable y multivariable en busca de asociación con SDE. Resultados: Los estudiantes tenían una media de edad de 20,3 arios; de los 458 encuestados, el 62,88% eran mujeres. Se estableció que el 80,75% de los participantes tenían SDE y el 80,55%, una percepción negativa de la calidad del sueño (OR = 1,91;IC95%, 1,11-3,29; p = 0,019). En el análisis multivariable, se encontró que el hecho de estar cursando ciencias clínicas disminuye el riesgo de SDE respecto a quienes estaban cursando el ciclo básico. Además, se observó que una puntuación > 15 en el IHS aumenta de manera significativa el riesgo de padecer SDE. Conclusiones: Aunque es frecuente encontrar SDE en los estudiantes de Medicina, solo un pequeño porcentaje de ellos sufren la forma severa de este trastorno del sueño. Estar cursando asignaturas del ciclo básico se asocia con mayor riesgo de SDE, por lo cual es importante que los comités curriculares de las IES evalúen regularmente la cantidad de horas de trabajo supervisado e independiente que realizan los estudiantes de Medicina. Finalmente, es importante emprender campañas orientadas a mejorar la percepción de riesgo sobre el uso de bebidas energizantes de los estudiantes universitarios y realizar, desde el ingreso al programa académico, recomendaciones sobre los hábitos de higiene del sueño.

ABSTRACT Introduction: Excessive daytime sleepiness (EDS) can interfere with academic and professional performance, as affected individuals tend to fall asleep in situations that demand a high level of alertness. Medical students are often a population at risk of suffering from EDS due to the demanding number of study hours, the significant number of credits per subject in the academic curriculum, practical teaching sessions and hospital night shifts, which can lead to sleep deprivation or sleep debt. It is for these reasons that it is important to estimate the prevalence of EDS and its associated factors in medical students of a Higher Education Institution (HEI) in Bucaramanga, in order to implement early prevention strategies to reduce the occurrence of this problem and to improve the students' quality of life and academic performance. Material and methods: An observational, cross-sectional analytical study with a population sample of 458 medical students enrolled in the second semester of 2015 at the Universidad Autonomade Bucaramanga (UNAB), who completed four questionnaires: Sociodemographic Variables, Epworth Sleepiness Scale, Pittsburgh Sleep Quality Index and Sleep Hygiene Index (SHI). A bivariate and multivariate analysis was performed to identify any correlations with EDS. Results: Mean student age was 20.3 years and 62.88% of the 458 respondents were women. We were able to establish that 80.75% of participants suffered from EDS and 80.55% had a negative perception of their sleep quality (OR=1.91; 95% CI, 1.11-3.29; p =0.019). In the multivariate analysis, it was found that the risk of EDS is lower in the clinical sciences than in the basic cycle. Furthermore, it was noted that a score higher than 15 in the Sleep Hygiene Index significantly increases the risk of suffering from EDS. Conclusions: Although EDS is very common in medical students, only a small percentage present the most severe form of this sleep disorder. Being enrolled in basic cycle subjects is associated with a higher risk of suffering EDS, so it is important for the curriculum committees of higher education institutions to regularly evaluate the number of hours of supervised and independent work performed by medical students. Finally, it is important to implement campaigns aimed at improving university students' perception of the risk of taking energy drinks and to establish sleep hygiene recommendations from the start of the academic programme.

Does Rapid Eye Movement Sleep Aggravate Obstructive Sleep Apnea?

OBJECTIVES.: To investigate the apnea-hypopnea index (AHI) according to the sleep stage in more detail after control of posture. METHODS.: Patients who underwent nocturnal polysomnography between December 2007 and July 2018 were retrospectively evaluated. Inclusion criteria were as follows: age >18 years, sleep efficacy >80%, and patients who underwent polysomnography only in the supine position (100% of the time). Patients were classified into different groups according to the methods: the first, rapid eye movement (REM)-dominant group (AHIREM/AHINREM >2), non-rapid eye movement (NREM)-dominant group (AHINREM/AHIREM >2), and non-dominant group; and the second, light sleep group (AHIN1N2>AHISWS) and slow wave sleep (SWS) group (AHISWS>AHIN1N2). RESULTS.: A total of 234 patients (mean age, 47.4±13.9 years) were included in the study. There were 108 patients (46.2%) in the REM-dominant group, 88 (37.6%) in the non-dominant group, and 38 (16.2%) in the NREM-dominant group. The AHI was significantly higher in the NREM-dominant group than in the REM-dominant group (32.9±22.9 events/hr vs. 18.3±9.5 events/hr, respectively). There were improvements in the AHI from stage 1 to SWS in NREM sleep with the highest level in REM sleep. A higher AHISWS than AHIN1N2 was found in 16 of 234 patients (6.8%); however, there were no significant predictors of these unexpected results except AHI. CONCLUSION.: Our results demonstrated the highest AHI during REM sleep stage in total participants after control of posture. However, there were 16.2% of patients showed NREM-dominant pattern (AHINREM/AHIREM >2) and 6.8% of patients showed higher AHISWS than AHIN1N2. Therefore, each group might have a different pathophysiology of obstructive sleep apnea (OSA), and we need to consider this point when we treat the patients with OSA.

Effects of Auricular Acupressure on Joint Pain, Range of Motion, and Sleep in the Elderly with Knee Osteoarthritis

PURPOSE: The purpose of this paper is to determine effects of auricular acupressure on knee pain, range of motion, and sleep in the elderly with knee osteoarthritis. METHODS: This is an experimental study designed with randomization and single-blind in a placebo-control approach. The subjects included the elderly with knee osteoarthritis who were using an elderly welfare facility. In each of the groups, 28 subjects were assigned. For the experimental group, auricular acupressure was applied to five pressure points related to the pain caused by osteoarthritis and sleep. In the case of the placebo-control group, auricular acupressure was applied to other five points than the former. The intervention lasted eight weeks. In order to examine intervention effects of auricular acupressure, joint pain, Pressure Pain Thresholds (PPTs), and extension and flexion range of motion (ROM) were measured weekly. As for the pre- and post-examinations, pain, sleep quality, and the time-by-sleep stage of the patients with knee osteoarthritis were measured. RESULTS: The VAS scores in the experimental group with auricular acupressure significantly decreased through time (p<.001) and WOMAC also significantly decreased (p<.01) compared with the placebo-control group. However, there were no significant differences in PPTs. The flexion (p<.01) and extension (p<.001) ROMs measured for eight weeks improved over time. Meanwhile, sleep quality improved significantly after the intervention termination (p<.01), but there was no significant difference found in the time-by-sleep stage. CONCLUSION: Auricular acupressure applied for eight weeks was found to be effective in reducing joint pain, improving knee ROM, and improving sleep quality in patients with degenerative knee arthritis.

The amplitude integrated electroencephalogram feature of term newborns with different blood glucose level / 中国新生儿科杂志

Objective To study the characteristics of amplitude integrated electroencephalogram (aEEG) in full-term newborns with different blood glucose levels,so as to provide clinical evidence for assessing brain function after hypoglycemia.Method Full-term neonates admitted to the neonatal ward of the Third Xiangya Hospital of Central South University from June 2014 to May 2016 with the initial diagnosis of hypoglycemia were enrolled to hypoglycemia group.According to the lowest level of blood glucose,infants were assigned to three subgroups,severe hypoglycemia group (＜ 1.1 mmol/L),moderate hypoglycemia group (1.1 ～ ＜2.2 mmol/L),and mild hypoglycemia group (2.2 ～ ＜2.8 mmol/L).Time matched asymptomatic term infants,who were admitted to the neonatal ward due to maternal high risks and with normal blood glucose after birth,were enrolled to control group.A 4 h continuous aEEG monitoring was completed for each infant in hypoglycemia group within 12 h after the blood glucose level stabilized.The newborns in control group were given aEEG examination 72 ～ 120 h after birth,the duration of monitoring was also 4 h.The aEEG scoring was completed and compared by rank sum test.Result A total of 83 neonates were enrolled in hypoglycemia group,including 11 with severe hypoglycemia,32 with moderate hypoglycemia,and 40 with mild hypoglycemia.Another 26 neonates with normal blood glucose level were enrolled in control group.The incidence of pregnancy-induced maternal blood glucose elevation was statistically significant among each group (P ＜ 0.05).The duration of neonatal hypoglycemia in severe hypoglycemia group was longer than that in moderate hypoglycemia group and mild hypoglycemia group [38.3 (20.7,50.4) h vs.20.4(15.3,22.6) h,13.7 (7.8,19.4) h] (P＜ 0.05).The range of glucose level in severe hypoglycemia group was larger than that in mild and moderate hypoglycemia group [5.0 (4.0,5.5) mmol/Lvs.3.5 (3.0,3.9) mmol/L,3.3 (2.8,3.8) mmol/L] (P ＜ 0.05),but there was no significant difference in the onset of first hypoglycemia between groups (P ＞ 0.05).The aEEG score showed that there was significant difference in total score and sleep-wake cycle score between groups (P ＜ 0.05).The score of sleep-wake cycle in severe hypoglycemia group was significantly lower than that in moderate hypoglycemia group or in mild hypoglycemia group or in the control group (P ＜ 0.05),while there was no significant difference between moderate and mild hypoglycemia groups,and between moderate hypoglycemia and control group (P ＞ 0.05).Conclusion Severe hypoglycemia can lead to neonatal aEEG changes,mainly in the sleep-wake cycle changes.

Novel type of unperturbed sleep monitoring scheme under pillow based on hidden Markov model / 生物医学工程学杂志

Sleep status is an important indicator to evaluate the health status of human beings. In this paper, we proposed a novel type of unperturbed sleep monitoring system under pillow to identify the pattern change of heart rate variability (HRV) through obtained RR interval signal, and to calculate the corresponding sleep stages combined with hidden Markov model (HMM) under the no-perception condition. In order to solve the existing problems of sleep staging based on HMM, ensemble empirical mode decomposition (EEMD) was proposed to eliminate the error caused by the individual differences in HRV and then to calculate the corresponding sleep stages. Ten normal subjects of different age and gender without sleep disorders were selected from Guangzhou Institute of Respirator Diseases for heart rate monitoring. Comparing sleep stage results based on HMM to that of polysomnography (PSG), the experimental results validate that the proposed noninvasive monitoring system can capture the sleep stages S1-S4 with an accuracy more than 60%, and performs superior to that of the existing sleep staging scheme based on HMM.

Fast Convolutional Method for Automatic Sleep Stage Classification / 대한의료정보학회지

OBJECTIVES: Polysomnography is essential to diagnose sleep disorders. It is used to identify a patient's sleep pattern during sleep. This pattern is obtained by a doctor or health practitioner by using a scoring process, which is time consuming. To overcome this problem, we developed a system that can automatically classify sleep stages. METHODS: This paper proposes a new method for sleep stage classification, called the fast convolutional method. The proposed method was evaluated against two sleep datasets. The first dataset was obtained from physionet.org, a physiologic signals data centers. Twenty-five patients who had a sleep disorder participated in this data collection. The second dataset was collected in Mitra Keluarga Kemayoran Hospital, Indonesia. Data was recorded from ten healthy respondents. RESULTS: The proposed method reached 73.50% and 56.32% of the F-measures for the PhysioNet and Mitra Keluarga Kemayoran Hospital data, respectively. Both values were the highest among all the machine learning methods considered in this study. The proposed method also had an efficient running time. The fast convolutional models of the PhysioNet and Mitra Keluarga Kemayoran Hospital data needed 42.60 and 0.06 seconds, respectively. CONCLUSIONS: The fast convolutional method worked well on the tested datasets. It achieved a high F-measure result and an efficient running time. Thus, it can be considered a promising tool for sleep stage classification.

Características de hábitos de sono entre adolescentes da cidade de Ribeirão Preto (SP) / Characteristics of sleep habits among adolescents living in the city of Ribeirão Preto (SP)

INTRODUCTION: Adolescence is the period of transition between childhood and adult life, characterized by changes in physical, emotional, sexual and social development. Although during this phase most individuals are healthy, it is known that health status is related to behaviors and habits such as a healthy diet, the regular practice of physical activity and good sleep quality, which contribute to optimum physical and cognitive performance. OBJECTIVE: To determine some sleep characteristics of adolescents living in the city of Ribeirão Preto (SP). METHODS: This was a cross-sectional descriptive study conducted at 14 schools in the city of Ribeirão Preto (SP) including adolescents aged 10 to 19 years who answered a questionnaire about sleep habits. The chi-square test was used to determine differences between genders with the aid of the EPI-INFO 7 software, with the level of significance set at p<0.05. RESULTS: A total of 535 adolescents (65% girls) were included in the study. Of these, 47.7% studied during the morning period and 10.3% had a job and studied in the evening period. Regarding sleep duration, 242 (45%) slept less than 9 hours per night during week days and 256 (48%) during the weekends (Saturday and Sunday), Of the total number of adolescents studied, 75.5% reported that they went to bed when they felt sleepy, 90% reported delay in falling asleep, 84.3% used some type of electronic equipment before going to sleep, and 44% reported that they woke up during the night. In the morning, 70.3% needed to be awakened, and 44.7% reported a delay in waking up. During the daytime, 70% felt somnolent and 34% reported that they slept during the day. Girls reported that they felt more daytime sleepiness (71.3%) and slept more during the day (62.1%) than boys (28.7% and 37.9%, respectively), with the difference being statistically significant (p < 0.05). CONCLUSIONS: Almost half the adolescents investigated sleep less than the minimum time considered ideal. Furthermore, the most of adolescents went to the bed when they felt sleepy, used electronic devices before to sleep, had difficulties to fall asleep, need to be awake in the morning and felt sleepy during the day. A substantial proportion of adolescents studied awoke at night and slept during the day. Compared to boys, girls felt sleepy and slept during the day significantly.

INTRODUÇÃO: A adolescência é o período de transição entre a infância e a vida adulta, caracterizada por mudanças no desenvolvimento físico, emocional, sexual e social. Embora durante esta fase a maioria dos indivíduos seja saudável, sabe-se que o estado de saúde está relacionado a comportamentos e hábitos tais como dieta saudável, prática regular de atividade física e boa qualidade do sono, que contribuem para o desempenho físico e cognitivo ideal. OBJETIVO: Determinar algumas características do sono de adolescentes que vivem na cidade de Ribeirão Preto (SP). MÉTODO: Trata-se de um estudo descritivo transversal realizado em 14 escolas da cidade de Ribeirão Preto (SP), incluindo adolescentes de 10 a 19 anos que responderam a um questionário sobre hábitos de sono. O teste do qui-quadrado foi usado para determinar diferenças entre gêneros com o software EPI-INFO 7, com o nível de significância definido em p <0,05 RESULTADOS: 535 adolescentes (65% meninas) foram incluídos no estudo. Destes, 47,7% estudavam durante o período da manhã e 10,3% trabalhavam e estudavam no período da noite. Em relação à duração do sono, 242 (45%) dormiram menos de 9 horas por noite durante a semana e 256 (48%) durante os fins de semana (sábado e domingo). Do total de adolescentes estudados, 75,5% relataram que foram para a cama quando sentiam sono, 90% relataram atraso em adormecer, 84,3% usaram algum tipo de equipamento eletrônico antes de dormir e 44% relataram que acordaram durante a noite. No período da manhã, 70,3% precisavam ser despertados, e 44,7% relataram atraso no despertar. Durante o dia, 70% sentiram-se sonolentos e 34% relataram que dormiam durante o dia. As meninas relataram que sentiram mais sonolência diurna (71,3%) e dormiam mais durante o dia (62,1%) que os meninos (28,7% e 37,9%, respectivamente), sendo a diferença estatisticamente significante (p <0,05). CONCLUSÃO: Quase metade dos adolescentes investigados dorme menos que o tempo mínimo considerado ideal. Além disso, a maioria dos adolescentes foi à cama quando sentiu sono, usou dispositivos eletrônicos antes de dormir, teve dificuldades em adormecer, precisava ser acordado pela manhã e sentiu sono durante o dia. Uma parcela substancial dos adolescentes estudados ficava acordada à noite e dormia durante o dia. Em comparação com os meninos, as meninas sentiram sono e dormiram durante o dia de forma significativa.

Calidad del sueño y somnolencia diurna excesiva en mujeres puérperas atendidas en un hospital general. estudio comparativo / Sleep quality and excessive daytime sleepiness in puerperal women attended at a general hospital. a comparative study

Objetivos: describir la calidad del sueño y somnolencia diurna excesiva en mujeres puérperas. Material y métodos: El estudio fue observacional y descriptivo de una serie de casos y se llevó a cabo en la consulta externa del Servicio de Pediatría y Gineco-Obstetricia del Hospital Nacional Cayetano Heredia en Lima, Perú. Se constituyeron tres grupos, el primero conformado por puérperas, el segundo por madres no puérperas y el tercero por nulíparas. Además de un instrumento de filiación, se utilizaron las escalas de Pittsburgh y Epworth. El nivel de significación estadística (α) fue de 0,05...

Objectives: to describe the quality of sleep and day time hypersomnolence in puerperal women. Materials and Methods: A descriptive case-series study was conducted in the Pediatric and Obstetric departments of the Hospital Cayetano Heredia in Lima, Perú. Three sample groups were formed, the first consisting of puerperal women, thesecond ofnon-puerperal mothers, and the third of nulliparous women. An affiliative instrument and the Pittsburgh and Epworth scales were used. The statistical significance level (α) was 0.05...

Obstructive sleep apnea related to rapid-eye-movement or non-rapid-eye-movement sleep: comparison of demographic, anthropometric, and polysomnographic features / Apneia obstrutiva do sono relacionada ao sono rapid eye movement ou ao sono non-rapid eye movement: comparação de aspectos demográficos, antropométricos e polissonográficos

Objective : To determine whether there are significant differences between rapid-eye-movement (REM)-related obstructive sleep apnea (OSA) and non-REM (NREM)-related OSA, in terms of the demographic, anthropometric, and polysomnographic characteristics of the subjects. Methods : This was a retrospective study of 110 patients (75 males) with either REM-related OSA (n = 58) or NREM-related OSA (n = 52). To define REM-related and NREM-related OSA, we used a previously established criterion, based on the apnea-hypopnea index (AHI): AHI-REM/AHI-NREM ratio > 2 and ≤ 2, respectively. Results : The mean age of the patients with REM-related OSA was 49.5 ± 11.9 years, whereas that of the patients with NREM-related OSA was 49.2 ± 12.6 years. The overall mean AHI (all sleep stages combined) was significantly higher in the NREM-related OSA group than in the REM-related OSA group (38.6 ± 28.2 vs. 14.8 ± 9.2; p < 0.05). The mean AHI in the supine position (s-AHI) was also significantly higher in the NREM-related OSA group than in the REM-related OSA group (49.0 ± 34.3 vs. 18.8 ± 14.9; p < 0.0001). In the NREM-related OSA group, the s-AHI was higher among the men. In both groups, oxygen desaturation was more severe among the women. We found that REM-related OSA was more common among the patients with mild-to-moderate OSA, whereas NREM-related OSA was more common among those with severe OSA. Conclusions : We found that the severity of NREM-related OSA was associated mainly with s-AHI. Our findings suggest that the s-AHI has a more significant effect on the severity of OSA than does the AHI-REM. When interpreting OSA severity and choosing among treatment modalities, physicians should take into consideration the sleep stage and the sleep posture.

Objetivo : Determinar se há diferenças significativas entre apneia obstrutiva do sono (AOS) relacionada a sono rapid eye movement (REM) e a sono non rapid eye movement (NREM), em termos de características demográficas, antropométricas e polissonográficas dos indivíduos. Métodos : Estudo retrospectivo com 110 pacientes (75 homens) com AOS relacionada a sono REM (AOS-REM; n = 58) ou a sono NREM (AOS-NREM; n = 52). Para a definição de AOS-REM e AOS-NREM, utilizamos um critério previamente estabelecido, baseado no índice de apneia-hipopneia (IAH): razão IAH-REM/IAH-NREM > 2 e ≤ 2, respectivamente. Resultados : A média de idade dos pacientes com AOS-REM foi de 49,5 ± 11,9 anos, ao passo que a dos pacientes com AOS-NREM foi de 49,2 ± 12,6 anos. A média geral de IAH (todos os estágios de sono combinados) foi significativamente maior no grupo AOS-NREM do que no grupo AOS-REM (38,6 ± 38,2 vs. 14,8 ± 9,2; p < 0,05). A média de IAH na posição supina (IAH-s) foi também significativamente maior no grupo AOS-NREM que no grupo AOS-REM (49,0 ± 34,3 vs. 18,8 ± 14,9; p < 0,0001). No grupo AOS-NREM, o IAH-s foi maior nos homens. Nos dois grupos, a dessaturação de oxigênio foi mais grave nas mulheres. Observou-se que AOS-REM foi mais comum nos pacientes com AOS de moderada a grave, enquanto AOS-NREM foi mais comum nos pacientes com AOS grave. Conclusões : Observou-se que a gravidade de AOS-NREM estava associada principalmente a IAH-s. Nossos achados sugerem que o IAH-s tem um efeito mais significativo na gravidade de AOS do que o IAH-REM. Ao interpretar a gravidade da AOS e selecionar as modalidades de tratamento, os médicos devem levar em consideração o estágio do sono e a postura durante o sono.

Risk Factors for Cardiovascular Disease, Metabolic Syndrome and Sleepiness in Truck Drivers / Fatores de Risco para Doença Cardiovascular, Síndrome Metabólica e Sonolência em Motoristas de Caminhão

Abstract Background: Truck driver sleepiness is a primary cause of vehicle accidents. Several causes are associated with sleepiness in truck drivers. Obesity and metabolic syndrome (MetS) are associated with sleep disorders and with primary risk factors for cardiovascular diseases (CVD). We analyzed the relationship between these conditions and prevalence of sleepiness in truck drivers. Methods: We analyzed the major risk factors for CVD, anthropometric data and sleep disorders in 2228 male truck drivers from 148 road stops made by the Federal Highway Police from 2006 to 2011. Alcohol consumption, illicit drugs and overtime working hours were also analyzed. Sleepiness was assessed using the Epworth Sleepiness Scale. Results: Mean age was 43.1 ± 10.8 years. From 2006 to 2011, an increase in neck (p = 0.011) and abdominal circumference (p < 0.001), total cholesterol (p < 0.001), triglyceride plasma levels (p = 0.014), and sleepiness was observed (p < 0.001). In addition, a reduction in hypertension (39.6% to 25.9%, p < 0.001), alcohol consumption (32% to 23%, p = 0.033) and overtime hours (52.2% to 42.8%, p < 0.001) was found. Linear regression analysis showed that sleepiness correlated closely with body mass index (β = 0.19, Raj2 = 0.659, p = 0.031), abdominal circumference (β = 0.24, Raj2 = 0.826, p = 0.021), hypertension (β = -0.62, Raj2 = 0.901, p = 0.002), and triglycerides (β = 0.34, Raj2 = 0.936, p = 0.022). Linear multiple regression indicated that hypertension (p = 0.008) and abdominal circumference (p = 0.025) are independent variables for sleepiness. Conclusions: Increased prevalence of sleepiness was associated with major components of the MetS.

Resumo Fundamento: A sonolência de motoristas de caminhão, que pode resultar de diferentes causas, é a principal causa de acidentes com veículos. Obesidade e síndrome metabólica (SMet) estão associadas a distúrbios do sono e fatores de risco primários para doença cardiovascular (DCV). Este estudo verificou a relação entre essas condições e a prevalência de sonolência em motoristas de caminhão. Métodos: Este estudo analisou os principais fatores de risco para DCV, dados antropométricos e distúrbios do sono em 2.228 motoristas de caminhão do sexo masculino a partir de informação coletada de 148 paradas efetuadas em rodovias pela Polícia Rodoviária Federal entre 2006 e 2011. Consumo de álcool e de drogas ilícitas e excesso de horas trabalhadas também foram analisados. Sonolência foi avaliada com a Escala de Sonolência de Epworth. Resultados: A idade média foi de 43,1 ± 10,8 anos. De 2006 a 2011, observou-se aumento de: circunferências cervical (p = 0,011) e abdominal (p < 0,001); colesterol total (p < 0,001); níveis séricos de triglicerídeos (p = 0,014); sonolência (p < 0,001). Além disso, houve redução de hipertensão (de 39,6% para 25,9%, p < 0,001), consumo de álcool (de 32% para 23%, p = 0,033) e excesso de horas trabalhadas (de 52,2% para 42,8%, p < 0,001). A análise de regressão linear mostrou correlação íntima de sonolência com índice de massa corporal (β = 0,19, Raj2 = 0,659, p = 0,031), circunferência abdominal (β = 0,24, Raj2 = 0,826, p = 0,021), hipertensão (β = -0,62, Raj2 = 0,901, p = 0,002) e triglicerídeos (β = 0,34, Raj2 = 0,936, p = 0,022). Regressão linear múltipla indicou que hipertensão (p = 0,008) e circunferência abdominal (p = 0,025) são variáveis independentes para sonolência. Conclusões: Elevada prevalência de sonolência foi associada com os principais componentes da SMet.

Calidad del sueño en una población adulta expuesta al ruido del Aeropuerto El Dorado, Bogotá, 2012 / Sleep quality in an adult population exposed to the noise of El Dorado Airport, Bogotá, 2012

Introducción. El Aeropuerto de Bogotá está dentro de la ciudad y su ampliación podría representar un aumento de los efectos adversos del ruido sobre la salud de los habitantes de las localidades de Fontibón y Engativá. Objetivo. Conocer la prevalencia de los trastornos del sueño y los factores asociados en residentes de Fontibón expuestos al ruido del Aeropuerto El Dorado. Materiales y métodos. Se hizo un estudio de corte transversal con una muestra de 205 personas de 18 a 65 años de edad, seleccionada mediante muestreo aleatorio estratificado. La calidad del sueño se evaluó mediante el índice de calidad del sueño de Pittsburgh (ICSP) y la escala de somnolencia de Epworth (ESE). Se hicieron análisis estadísticos descriptivos y pruebas de correlación entre estos instrumentos. Resultados. El 60 % de los residentes informaron mala calidad del sueño según el índice de calidad del sueño de Pittsburgh (ICSP>5), con una media de 7,19 (desviación estándar, DE=3,931), y se encontraron puntuaciones patológicas así: calidad subjetiva del sueño, 27 %; latencia del sueño, 39 %; duración del sueño, 33 %; eficiencia habitual del sueño, 37 %; alteraciones del sueño, 30 %; disfunción diurna, 40 %, y uso de hipnóticos, 5 %. Según la escala de somnolencia de Epworth (ESE>10), se reportó 28 % de somnolencia diurna. Con relación a la prevalencia de la mala calidad del sueño según el índice, 17 % de quienes reportaron no dormir debido al ruido lo asoció al tráfico aéreo. Se encontró correlación entre el índice y la escala ( r =0,329, IC 95% 0,20-0,44). Conclusiones. Los habitantes de la localidad presentaron mala calidad del sueño por exposición al ruido, siendo la operación aeroportuaria una de las principales fuentes generadoras. Es necesario revisar las estrategias de mitigación de ruido en la localidad y considerar las implicaciones de la ampliación del Aeropuerto El Dorado para la salud pública.

Introduction: The airport of Bogotá lies within the city and its expansion could produce an increase in adverse effects on the health of the inhabitants of Fontibón and Engativá districts due to the noise it generates. Objective: To determine the prevalence of sleep disturbances and associated factors among residents of Fontibón exposed to this noise. Materials and methods: A cross-sectional study design was used, involving a sample of 205 people aged 18 to 65, selected by means of stratified random sampling. Sleep quality was evaluated using the Pittsburgh Sleep Quality Index (PSQI) and the Epworth Sleepiness Scale (ESS). Descriptive statistics were carried out, as well as correlation tests between the different scales. Results: A total of 60% of the residents reported poor quality sleep (PSQI>5), with a mean PSQI of 7.19 (SD=3.931), and the following pathological interruptions were found: subjective sleep quality, 27%; sleep latency, 39%; sleep duration, 33%; habitual sleep efficiency, 37%; sleep alterations, 30%; diurnal dysfunction, 40%, and use of sleeping medication, 5%. According to the Epworth Sleepiness Scale (ESS>10), 28% of residents reported daytime somnolence. Regarding the prevalence of poor quality sleep according to the Pittsburgh Sleep Quality Index, 17% of those who reported not being able to sleep because of noise associated this with air traffic. A correlation was observed between the index and the scale ( r =0.329, CI 95%: 0.20-0.44). Conclusions: Inhabitants of the district reported poor sleep quality due to exposure to noise, airport operations being one of the main generating sources. Noise mitigation strategies in the district need to be reviewed and the public health implications of the El Dorado Airport expansion should be considered.

Hábitos del sueño y accidentes de tránsito en conductores de ómnibus interprovincial de Arequipa, Perú / Sleep habits and traffic accidents in inter-provincial bus drivers of Arequipa, Peru

Con el objetivo de determinar los hábitos de sueño en los conductores de ómnibus y su relación con los accidentes en la ciudad de Arequipa, Perú, se realizó un estudio transversal y descriptivo en una muestra no probabilística de 166 conductores. Las horas de conducción por día fueron de 9,4 ± 3,7; el 54% (89) conduce más de 4 h sin detenerse; 74% (123) conducen de noche y 87% (145) duermen en el ómnibus. El 75% reconoció cansancio durante la conducción (124). El 27% (45) tuvo somnolencia; el 24% (40) refirió haberse accidentado o haber estado a punto de accidentarse durante la conducción. La somnolencia o el cansancio durante la conducción fue frecuente en esta población, y sus hábitos de conducción y descanso podrían propiciarlo.

In order to determine sleep habits in bus drivers and their relationship to accidents in the city of Arequipa, Peru, a crosssectional descriptive study was conducted in a non-probabilistic sample of 166 drivers. Driving hours per day were 9.4 ± 3.7. 54% (89) drive over 4 hours without stopping; 74% (123) drive at night; and 87% (145) sleep on the bus. 75% reported fatigue while driving (124). 27% (45) had drowsiness; 24% (40) reported having been in or on the verge of an accident while driving. Sleepiness or fatigue while driving was common in this population and their driving and rest habits could contribute to this.

Chronic pain related to quality of sleep / Dor crônica relacionada à qualidade do sono

Objective To determine the relation between the degrees of chronic pain and drowsiness levels. Methods The study was conducted with 115 patients, who answered the questionnaire as diagnostic criteria in the survey. After evaluation based on the protocol of chronic pain registry RDC/TMD− Axis II, the Epworth Sleepiness Scale was applied to assess drowsiness levels. Results Among the participating patients, there were more females (80%), and the type of pain more prevalent was chronic (70.4%). Concerning the grades of chronic pain, grade II predominated (38.3%), corresponding to high pain intensity and low disability. The ratio observed for levels of sleepiness was more prevalent for sleep debt average (38.3%). Conclusion The grades of chronic pain and the levels of sleepiness did not correlate with each other or with the gender of patients. .

Objetivo Determinar a relação entre os graus de dor crônica e os níveis de sonolência. Métodos Participaram 115 pacientes que responderam ao questionário usado como critério diagnóstico na pesquisa. Após avaliação segundo protocolo de registro de dor crônica RDC/TMD − Eixo II, aplicou-se a Escala de Sonolência de Epworth para verificar os níveis de sonolência. Resultados Dentre os pacientes participantes havia mais mulheres (80%) e o tipo de dor mais prevalente era crônica (70,4%). Na relação dos graus de dor crônica, predominou o grau II (38,3%), correspondente à alta intensidade de dor e baixa incapacidade. A proporção observada para os níveis de sonolência mostrou maior prevalência para o débito de sono médio (38,3%). Conclusão Os graus de dor crônica e níveis de sonolência não apresentam correlação entre si, nem com o gênero dos pacientes. .

O impacto da qualidade do sono na formação médica / The impact of sleep quality in medical education

JUSTIFICATIVA E OBJETIVO: As demandas acadêmicas dos estudantes do curso de graduação em Medicina tendem a alterar a qualidade do sono e a dessincronizar o ciclo sono-vigília, obrigando-os a decidir entre manter a regularidade do ciclo sono-vigília ou satisfazer as necessidades de sono, para responder às obrigações acadêmicas. O objetivo deste trabalho foi estudar a qualidade do sono nos acadêmicos do curso de Medicina. MÉTODOS: Estudo transversal, quantitativo, descritivo do tipo inquérito, em que a amostra foi composta por 184 acadêmicos. Dos entrevistados, O instrumento utilizado foi o Índice de Qualidade do Sono de Pittsburgh e a Escala de Sonolência de Epworth. A análise estatística foi feita pelo pacote Statistical Package for the Social Sciences e pelo teste qui-quadrado. RESULTADOS: Dos 184 acadêmicos entrevistados, 61,9% (n=112) relataram qualidade ruim de sono, 31% (n=13) referiram sonolência excessiva no período diurno e 37,9% relataram dor como um dos fatores principais que interferem na qualidade do sono. CONCLUSÃO: Foi observado que grande parte dos estudantes tem qualidade ruim de sono e que, adicionalmente, muitos acadêmicos com os padrões de sono pobres referem piora no bem-estar durante o dia, como sonolência excessiva diurna.

BACKGROUND AND OBJECTIVE: The academic demands of undergraduate medicine students tend to change the quality of sleep and desynchronize the sleep-wake cycle, forcing them to choose between keeping a regular sleep-wake cycle or meeting sleep needs, in order to acomplish academic obligations. The aim of this study was to evaluate sleep quality in medical students. METHODS: This is cross-sectional, quantitative, descriptive study with survey, in which the sample had 184 academics. The instruments used were the Pittsburgh Sleep Quality Index and Epworth Sleepiness Scale. Statistical analysis was performed with the Statistical Package for the Social Sciences, and the chi-square test. RESULTS: Of the 184 academics interviewed, 61.9% (n=112) reported poor quality of sleep; 31% (n=13) reported excessive sleepiness during the day; and 37.9% reported pain as one of the main factors that interfere with the quality of sleep. CONCLUSION: A large number of students have poor quality of sleep, and, additionally, many academics with poor sleep patterns report worsening of well-being during the day, such as excessive daytime sleepiness.

The relationship between interictal epileptic discharges and sleep cycle of 240 epilepsy patients / 中华神经科杂志

Objective The poor sleep quality of epileptic patients may be partly due to the occurrence epileptiform discharges (EDs).We observed the number of interictal discharges in each sleep stage and explored the associations between EDs and sleep phases in epilepsy patients.Methods Two hundred and forty epileptic patients and 213 healthy volunteers were enrolled in the current study.For all subjects,video-electroencephalogram monitoring and 24 h-night polysomnography were conducted to detect EDs and analyze the sleep structures.Results EDs were detected in 88.7％ (213/240) of epilepsy patients with the most frequent cases from the temporal lobe.The EDs detected during waking,sleeping,or both waking and non-rapid eye movement (NREM) sleep stage accounted for 20.6％ (44/213),40.4％ (86/213),and 38.9％ (83/213) of the total patients,respectively.The total sleep time and time spent in REM were similar between the epileptic patients and healthy volunteers.However,epileptic patients spent a significantly longer mean sleep time in NREM Ⅰ-Ⅱ ((304 ±39) min versus (225 ±29) min,t =3.51,P =0.000) and less in NREM Ⅲ-Ⅳ ((49 ± 7) min versus (133 ± 17) min,t =2.30,P =0.000) than healthy volunteers.Furthermore,asymmetric sleep spindles and fragmentary sleep structure as well as high inversion frequency were found in epilepsy patients,respectively.Conclusion Combination of long-term video electroencephalogram with polysomnography is a useful method to analyze associations between EDs and the sleep-wake cycle.This strategy can also help identify the nature of sleep disorders in epileptic patients,which may improve the treatment efficacy.

Padrão de sono e sonolência do trabalhador estudante de enfermagem / Sleep patterns and fatigue of nursing students who work / Patrón de sueño y somnolencia del trabajador estudiante de enfermería

Atualmente tem sido observado crescente interesse, na área da saúde, no desenvolvimento de pesquisas sobre as alterações de sono do trabalhador que acorda muito cedo ou trabalha à noite. Assim, objetivou-se identificar os níveis de sonolência e padrões de sono do estudante diurno de enfermagem que trabalha à noite. Trinta estudantes participaram, através do preenchimento da Escala de Sonolência de Epworth e Diário de Sono, durante trinta dias. Teve-se que a duração do sono foi maior para os homens, quando comparados às mulheres, nos dias sem trabalho e no período de férias quando comparado ao letivo. Apresentaram-se elevados níveis de sonolência, caracterizando incidência de sonolência diurna excessiva. Concluímos que o trabalhador noturno, que sofre privação do sono, tem um acréscimo das horas de vigília devido ao estudo, ocasionando níveis elevados de sonolência, o que pode prejudicar seu desempenho escolar e no trabalho.

It has been observed there is currently a growing interest in developing research regarding the sleep patterns of workers who must wake up very early or who work nights. Therefore, the objective of this study was to identify the levels of fatigue and the sleep patterns of nursing students who study during the day and work at night. Participants were thirty students who completed the Epworth Sleepiness Scale and Sleep Journal for thirty days. It was found that sleep duration was longer among men compared to women on days off work, and when on vacation from school compared to the regular school period. Participants showed high levels of fatigue and sleepiness, characterized by the incidence of excessive daytime sleepiness. In conclusion, night workers who endure sleep deprivation have additional wake hours due to studying, thus causing high levels of fatigue, which may harm their performance at school and at work.

Actualmente, se ha observado un creciente interés en el área de salud, referente al desarrollo de investigaciones sobre alteraciones del sueño del trabajador que despierta muy temprano o trabaja de noche. Consecuentemente, se objetivó identificar los niveles de somnolencia y patrones de sueño del estudiante diurno de enfermería que también trabaja de noche. Participaron treinta estudiantes, utilizándose la Escala de Somnolencia de Epworth y Diario de Sueño durante 30 días. Se constató que la duración del sueño fue mayor para los hombres en comparación con las mujeres, en los días sin trabajo, y en el período de vacaciones en comparación al ciclo lectivo. Presentaron elevados niveles de somnolencia, caracterizando incidencia de somnolencia diurna excesiva. Concluimos en que el trabajador nocturno, que sufre de privación del sueño, incrementa sus horas de vigilia debido al estudio, ocasionándose niveles elevados de somnolencia, lo cual puede perjudicar su desempeño escolar y laboral.

Síndrome das apnéias-hipopnéias obstrutivas do sono: associação com gênero e obesidade e fatores relacionados à sonolência / Obstructive sleep apnea-hypopnea syndrome: association with gender, obesity and sleepiness-related factors

OBJETIVO: Estudar os efeitos de gênero e obesidade e identificar fatores relacionados à sonolência diurna excessiva (SDE) em indivíduos com síndrome das apnéias-hipopnéias obstrutivas do sono (SAHOS). MÉTODOS: Foram selecionados para inclusão no estudo 300 pacientes consecutivos, atendidos em clínica do sono, com índice de apnéia/hipopnéia (IAH) > 10 eventos/hora de sono, que completaram adequadamente a avaliação clínica. RESULTADOS: A média de idade foi de 47 ± 11 anos e o IAH médio foi de 52,1 ± 29,2 eventos/hora de sono. As mulheres apresentaram maior média de idade, menos sonolência e menos tempo em apnéia. O escore médio de SDE foi de 14,7 ± 7,2. O escore de SDE correlacionou-se melhor com movimentos corpóreos (r = 0,43; p < 0,01), eventos respiratórios durante o sono (r = 0,40; p < 0,01), tempo em apnéia (r = 0,40; p < 0,01), valores mínimos da saturação periférica de oxigênio (SpO2; r = -0,38; p < 0,01) e IAH (r = 0,37; p < 0,01). O índice de massa corpórea (IMC) médio foi de 30,2 ± 5,3 kg/m². Sobrepeso, obesidade e obesidade mórbida foram observados em, respectivamente, 41, 44 e 5,3 por cento dos casos. A gravidade da doença correlacionou-se melhor com IMC (r = 0,51; p < 0,01). CONCLUSÕES: Maior média de idade, menor escore de SDE e menor tempo em apnéia foram associados ao gênero feminino. Fragmentação do sono, número e duração de eventos respiratórios durante o sono, níveis de SpO2 e obesidade se associaram à sonolência. O IMC teve efeito significativo na gravidade da SAHOS.

OBJECTIVE: To study the effects that gender and obesity have on excessive daytime sleepiness (EDS) in individuals with obstructive sleep apnea-hypopnea syndrome (OSAHS), as well as to identify factors associated with EDS in such individuals. METHODS: A total of 300 consecutive patients who completed the clinical evaluation satisfactorily and whose polysomnography showed an apnea-hypopnea index (AHI) > 10 events/hour of sleep were selected from a sleep clinic population for inclusion in the study. RESULTS: Mean age was 47 ± 11 years, and mean AHI was 52.1 ± 29.2 events/hour of sleep. Females presented higher mean age, lower EDS scores and less time in apnea. Mean EDS score was 14.7 ± 7.2. The EDS score correlated better with body movements (r = 0.43; p < 0.01), respiratory events during sleep (r = 0.40; p < 0.01), duration of apnea (r = 0.40; p < 0.01), peripheral oxygen saturation (SpO2; r = -0.38; p < 0.01) and AHI (r = 0.37; p < 0.01). Mean body mass index (BMI) was 30.2 ± 5.3 kg/m². Overweight, obesity and morbid obesity were observed in 41, 44 and 5.3 percent of cases, respectively. Disease severity correlated most strongly with BMI (r = 0.51; p < 0.01). CONCLUSIONS: Higher mean age, lower EDS scores and less time spent in sleep apnea time in apnea were associated with being female. Fragmented sleep, number/duration of respiratory events during sleep, SpO2 levels and obesity were associated with sleepiness. The BMI had a significant effect on OSAHS severity.