Impact of Obstructive Sleep Apnea on Liver Fat Accumulation According to Sex and Visceral Obesity

Rationale

Associations between obstructive sleep apnea (OSA) and liver fat accumulation have been frequently investigated because both morbidities are common. Visceral fat was reported to be closely related to OSA and liver fat accumulation. Recently, sex differences in the association between OSA and mortality have gained much attention.

Objectives

To investigate the associations among OSA, liver fat accumulation as determined by computed tomography, and visceral fat area and their sex differences.

Methods

Studied were 188 males and 62 females who consecutively underwent polysomnography and computed tomography.

Results

Although the apnea-hypopnea index was positively correlated with liver fat accumulation in the total males, none of the OSA-related factors was independently associated with liver fat accumulation in either the total male or female participants in the multivariate analyses. When performing subanalyses using a specific definition for Japanese of obesity or visceral obesity (body mass index (BMI) ≥25 kg/m² or visceral fat area ≥100 cm²), in only males without visceral obesity, percent sleep time with oxygen saturation <90%, in addition to BMI, insulin resistance, and serum triglyceride values, was independently correlated with liver fat accumulation (R² = 15.1%, P<0.001). In males, percent sleep time of oxygen saturation <90% was also a determining factor for alanine aminotransferase values regardless of visceral fat area. In contrast, OSA was not associated with liver fat accumulation or alanine aminotransferase values in females whether or not visceral obesity was absent.

Conclusions

Sex differences in the visceral fat-dependent impact of OSA on liver fat accumulation existed. Although the mechanisms are not known and ethnic differences may exist in addition to the specific criteria of visceral obesity in Japan, the treatment of male patients with OSA might be favorable from the viewpoint of preventing liver fat accumulation and liver dysfunction even in patients without obvious visceral fat accumulation.     

儿童阻塞性睡眠呼吸暂停低通气综合征与肥胖的相关性研究

目的:探讨儿童阻塞性睡眠呼吸暂停/低通气综合征(OSAHS)与肥胖的相关性。方法:收集单纯性肥胖儿童120例和体重正常儿童110例作为研究对象,进行统一的体格检查和专科检查,并进行多导睡眠监测记录阻塞性呼吸暂停指数(OAI)、呼吸暂停/低通气指数(AHI)、中枢性呼吸暂停指数(CAI)、最低血氧饱和度(LSa O2)和睡眠效率。结果:肥胖组OSAHS患病率为58.33%显著高于对照组的31.82%,差异有统计学意义(P0.05);OAI、AHI、CAI均显著高于对照组,而LSa O2、睡眠效率指标显著低于对照组,差异均有统计学意义(均P0.05);多因素回归分析显示,肥胖、扁桃体增生、腺样体增生是导致OSAHS的独立危险因素,差异有统计学意义(均P0.05)。结论:肥胖是儿童OSAHS发病的重要影响因素,特别是合并扁桃体肿大或腺样体肿大的患儿应注意预防OSAHS的发生。     

Treatment of the Obstructive Sleep Apnea Syndrome

The obstructive sleep apnea syndrome is a disorder of sleep and breathing that is being recognized with increasing frequency. The pathophysiologic consequences range from mild sleepiness to life-threatening cardiovascular and respiratory decompensation. The primary forms of treatment are directed at modifying the upper airway with either an operation or continuous positive airway pressure. Aside from tracheostomy, which is virtually always successful, other forms of treatment have met with varying results. Ancillary therapy, including oxygen, weight loss and drugs, is often helpful but seldom curative. Follow-up sleep studies are necessary to evaluate the effectiveness of treatment. Selecting therapy for a patient with obstructive sleep apnea requires a comprehensive evaluation including polysomnography, special examinations of the upper airway and assessing the cardiopulmonary status. Therapy is based on the severity of disease and must be tailored to each patient.     

阻塞性睡眠呼吸暂停综合症的咽部解剖分析

目的：对阻塞性睡眠呼吸暂停综合症（OSAS）咽部解剖途径进行分析。方法：探讨咽部解剖的方法,并从2012年1月到2013年1月这一年的时间段里,抽选出36例此类病患者进行多项检测并与36位无病史的人进行对照分析。结果：抽取的36例此类病患者均具有腭咽部狭窄的症状,其中大部分患者还合并有口咽部阻塞。结论：阻塞性睡眠呼吸暂停综合症的产生,与腭咽腔与口咽腔狭窄密切相关。     

阻塞性睡眠呼吸暂停综合征的分级检测

目的:对不同患病程度的OSAS患者的子带能量比特性进行研究,同时给出一种适用于家庭环境的OSAS检测方法。方法:以鼾声第一共振峰集中频段为先验知识,分析27例OSAS患者和13例单纯打鼾者鼾声的子带能量比。结果:本文方法能较好的区分OSAS患者和单纯打鼾者。中、重度OSAS患者的子带能量比均高于轻度患者,差异具有统计学意义,中度和重度患者的差异不明显。最后给出家庭环境中本文方法的检测精度,灵敏度为92.86%,特异性为92.97%。结论:本文方法能有效的检测OSAS患者,有望实现大规模普及化筛查,并为今后利用鼾声特性区分不同患病程度提供一种有效的研究思路。     

阻塞型睡眠呼吸暂停低通气综合征与代谢综合征组分关系探讨

目的:探讨阻塞型睡眠呼吸暂停低通气综合征(OSAHS)与代谢综合征(MS)组分关系。方法:对我院2003年1月至2010年7月39例诊断为OSAHS住院患者进行回顾性调查,30例同期住院病人为对照组,均记录年龄、性别,测量身高、体重、血压,检测空腹血糖、血脂,分析OSAHS患者合并MS组分情况。结果:1.OSAHS组与对照组比较,体重指数(BMI)、血压、血清甘油三酯、总胆固醇、低密度脂蛋白胆固醇、载脂蛋白A1升高,高密度脂蛋白胆固醇降低(P<0.05);2.OSAHS组与对照组相比较,无MS组分比例低于对照组,差异有统计学意义(P<0.05);3.OSAHS组与对照组相比较,OSAHS组合并MS组分,包括BMI≥25Kg/m2,血脂紊乱的比例,均高于对照组,差异有统计学意义(P<0.05)。结论:OSAHS患者易合并代谢综合征组分。     

阻塞型睡眠呼吸暂停低通气综合征与代谢综合征组分关系探讨

目的：探讨阻塞型睡眠呼吸暂停低通气综合征（OSAHS）与代谢综合征（MS）组分关系。方法：对我院2003年1月至2010年7月39例诊断为0SAHS住院患者进行回顾性调查,30例同期住院病人为对照组,均记录年龄、性别,测量身高、体重、血压,检测空腹血糖、血脂,分析OSAHS患者合并MS组分情况。结果：1．OSAHS组与对照组比较,体重指数（BMI）、血压、血清甘油三酯、总胆固醇、低密度脂蛋白胆固醇、载脂蛋白Al升高,高密度脂蛋白胆固醇降低（P〈0．05）;2．OSAHS组与对照组相比较,无MS组分比例低于对照组,差异有统计学意义（P〈0．05）;3．OSAHS组与对照组相比较,OSAHS组合并MS组分,包括BMI〉25Kg／m2,血脂紊乱的比例,均高于对照组,差异有统计学意义（P〈0．05）。结论：OSAHS患者易合并代谢综合征组分。     

阻塞性睡眠呼吸暂停综合征临床监测分析

目的:探讨阻塞性睡眠呼吸暂停综合征患者的临床特征及评价疗效。方法:回顾分析70例阻塞性睡眠呼吸暂停综合征患者PSG监测数据。结果:随着呼吸紊乱指数的增加,年龄、体重指数、最长呼吸暂停时间、最低SaO_2%、平均SaO_2%下降等指标在轻度与中、重度SAS之间差异显著;70例患者中伴有高血压52.9%、糖尿病5.7%、冠心病21.4%。结论:OSAS是一种具有潜在危险的疾痛,对OSAS早期诊断治疗是预防发生严重并发症的关键。     

Obstructive Sleep Apnea Syndrome: From Phenotype to Genetic Basis

Obstructive sleep apnea syndrome (OSAS) is a complex chronic clinical syndrome, characterized by snoring, periodic apnea, hypoxemia during sleep, and daytime hypersomnolence. It affects 4-5% of the general population. Racial studies and chromosomal mapping, familial studies and twin studies have provided evidence for the possible link between the OSAS and genetic factors and also most of the risk factors involved in the pathogenesis of OSAS are largely genetically determined. A percentage of 35-40% of its variance can be attributed to genetic factors. It is likely that genetic factors associated with craniofacial structure, body fat distribution and neural control of the upper airway muscles interact to produce the OSAS phenotype. Although the role of specific genes that influence the development of OSAS has not yet been identified, current researches, especially in animal model, suggest that several genetic systems may be important. In this chapter, we will first define the OSAS phenotype, the pathogenesis and the risk factors involved in the OSAS that may be inherited, then, we will review the current progress in the genetics of OSAS and suggest a few future perspectives in the development of therapeutic agents for this complex disease entity.Key Words: Obstructive sleep apnea, genetic, hypopnea, AHI, snoring, risk factors, phenotype, multifactorial disease.     

Relationship between Obstructive Sleep Apnea Severity and Sleep,Depression and Anxiety Symptoms in Newly-Diagnosed Patients

Obstructive sleep apnea (OSA) occurs in at least 10% of the population, and leads to higher morbidity and mortality; however, relationships between OSA severity and sleep or psychological symptoms are unclear. Existing studies include samples with wide-ranging comorbidities, so we assessed relationships between severity of OSA and common sleep and psychological disturbances in recently diagnosed OSA patients with minimal co-morbidities. We studied 49 newly diagnosed, untreated OSA patients without major co-morbidities such as mental illness, cardiovascular disease, or stroke; subjects were not using psychoactive medications or tobacco (mean ± std age: 46.8±9.1 years; apnea/hyponea index [AHI]: 32.1±20.5 events/hour; female/male: 12/37; weight <125 kg). We evaluated relationships between the AHI and daytime sleepiness (Epworth Sleepiness Scale; ESS), sleep quality (Pittsburg Sleep Quality Index; PSQI), depressive symptoms (Beck Depression Inventory-II; BDI), and anxiety symptoms (Beck Anxiety Inventory; BAI), as well as sex and body mass index (BMI). AHI was similar in females and males. Mean levels of all symptoms were above normal thresholds, but AHI was not correlated with age, ESS, PSQI, BDI, or BAI; only BMI was correlated with OSA severity. No differences in mean AHI appeared when subjects were grouped by normal versus elevated values of ESS, PSQI, BDI, or BAI. Consistent with other studies, a strong link between OSA severity and psychological symptoms did not appear in these newly diagnosed patients, suggesting that mechanisms additional to the number and frequency of hypoxic events and arousals occurring with apneas contribute to adverse health effects in OSA. OSA patients presenting with mild or moderate severity, and no major co-morbidities will not necessarily have low levels of sleep or psychological disturbances.     

儿童与成人阻塞型睡眠呼吸暂停低通气综合征代谢 异常特征的比较

目的:探讨儿童及成人阻塞型睡眠呼吸暂停低通气综合症(OSAHS)发病原因、睡眠呼吸紊乱严重程度及合并代谢异常程度的差别。方法:对我院2003年1月1日至2010年7月1日71例诊断为OSAHS住院患者进行回顾性调查,登记年龄、性别、发病原因、血压、白细胞计数、中性粒细胞比率、淋巴细胞比率、呼吸暂停低通气指数(AHI)、夜间最低血氧饱和度、微觉醒指数。根据年龄进行分组,年龄<18岁者为A组,年龄≥18岁者为B组。比较两组发病原因、睡眠呼吸紊乱及合并代谢异常程度的差别。结果:1.A组慢性扁桃体炎和(或)腺样体肥大发生率明显高于B组(P<0.01),鼻中隔偏曲发生率明显低于B组(P<0.01)。2.与B组比较,A组AHI及微觉醒指数降低,夜间最低血氧饱和度升高(P<0.01);3.与B组比较,A组高血压、中性粒细胞比率、谷丙转氨酶比例降低(P<0.05)。结论:A组睡眠呼吸紊乱程度及代谢异常较B组程度轻,更需关注成人阻塞型睡眠呼吸暂停低通气综合症的综合治疗。     

儿童与成人阻塞型睡眠呼吸暂停低通气综合征代谢异常特征的比较

目的：探讨儿童及成人阻塞型睡眠呼吸暂停低通气综合症（OSAHS）发病原因、睡眠呼吸紊乱严重程度及合并代谢异常程度的差别。方法：对我院2003年1月1日至20]0年7月1日71例诊断为OSAHS住院患者进行回顾性调查,登记年龄、性男日、发病原因、血压、白细胞计数、中性粒细胞比率、淋巴细胞比率、呼吸暂停低通气指数（AHI）、夜间最低血氧饱和度、微觉醒指数。根据年龄进行分组,年龄〈18岁者为A组,年龄≥18岁者为B组。比较两组发病原因、睡眠呼吸紊乱及合并代谢异常程度的差剐。结果：1．A组慢性扁桃体炎和（或）腺样体肥大发生率明显高于B组（P〈O．01）,鼻中隔偏曲发生率明显低于B组（P〈0．01）。2．与B组比较,A组AHI及微觉醒指数降低,夜间最低血氧饱和度升高（P〈0．01）;3．与B组比较,A组高血压、中性粒细胞比率、谷丙转氨酶比例降低（P〈0．05）。结论：A组睡眠呼吸紊乱程度及代谢异常较B组程度轻,更需关注成人阻塞型睡眠呼吸暂停低通气综合症的综合治疗。     

手术治疗儿童阻塞性睡眠呼吸暂停低通气综合征临床疗效观察

目的:观察手术治疗儿童阻塞性睡眠呼吸暂停低通气综合征(OSAHS)的手术治疗方法及临床效果,为临床治疗提供依据。方法:选取我院2010年2月~2013年1月期间收治的儿童阻塞性睡眠呼吸暂停低通气综合征患者56例做研究对象,对患儿的手术治疗方法及手术前后呼吸暂停指数、最低血氧饱和度及呼吸暂停低通气指数平均值进行记录和分析,比较其临床疗效情况。结果:三组患儿术后呼吸暂停指数、伴最低血氧饱和度、呼吸暂停低通气指数与术前比较,差异明显具有统计学意义,术后优于术前。中、重度鼻咽气道狭窄程度比较,术后较术前疗效显著,差异明显具有统计学意义(P0.05)。结论:儿童阻塞性睡眠呼吸暂停低通气综合征手术后呼吸暂停指数、伴最低血氧饱和度、呼吸暂停低通气指数得到显著改善,是治疗最佳方案,建议推广应用。     

Cumulative Association of Obstructive Sleep Apnea Severity and Short Sleep Duration with the Risk for Hypertension

Obstructive sleep apnea (OSA) and short sleep duration are individually associated with an increased risk for hypertension (HTN). The aim of this multicenter cross-sectional study was to test the hypothesis of a cumulative association of OSA severity and short sleep duration with the risk for prevalent HTN. Among 1,499 patients undergoing polysomnography for suspected OSA, 410 (27.3%) previously diagnosed as hypertensive and taking antihypertensive medication were considered as having HTN. Patients with total sleep time (TST) <6 h were considered to be short sleepers. Logistic regression procedures were performed to determine the independent association of HTN with OSA and sleep duration. Considering normal sleepers (TST ≥6 h) without OSA as the reference group, the odds ratio (OR) (95% confidence intervals) for having HTN was 2.51 (1.35–4.68) in normal sleepers with OSA and 4.37 (2.18–8.78) in short sleepers with OSA after adjustment for age, gender, obesity, diabetes, depression, current smoking, use of thyroid hormones, daytime sleepiness, poor sleep complaint, time in bed, sleep architecture and fragmentation, and study site. The risk for HTN appeared to present a cumulative association with OSA severity and short sleep duration (p<0.0001 for linear trend). The higher risk for HTN was observed in short sleepers with severe OSA (AHI ≥30) (OR, 4.29 [2.03–9.07]). In patients investigated for suspected OSA, sleep-disordered breathing severity and short sleep duration have a cumulative association with the risk for prevalent HTN. Further studies are required to determine whether interventions to optimize sleep may contribute to lower BP in patients with OSA.     

The Dimension of Hyoid Bone Is Independently Associated with the Severity of Obstructive Sleep Apnea

Introduction

We hypothesized that the size of the hyoid bone itself may affect the severity of sleep apnea. The aim of this study was to identify the relationship between hyoid bone dimensions and the severity of sleep apnea using computerized tomography (CT) axial images.

Methods

We retrospectively measured the hyoid bone in axial images of neck CTs and correlated these measurements with results of polysomnography in a total of 106 male patients. The new hyoid bone parameters studied in this study were as follows: distance between bilateral lesser horns (LH-d), distance between bilateral greater horns (GH-d), distance from the most anterior end of the hyoid arch to GH-d (AP), distance from the greater to the lesser horn on right and left sides (GH-LH), and the anterior angle between bilateral extensive lines from the greater to the lesser horn (H-angle). Data was analyzed using univariate and multivariate logistic regression, and Pearson correlation tests.

Results

We found a significant inverse correlation between the apnea-hypopnea index (AHI) and GH-d or AP. Neither the LH-d, GH-LH, nor H-angle were associated with the AHI. The patient group that met the criteria of both GH-d<45.4 and AP<33.4 demonstrated the most severe AHI.

Conclusion

The lateral width or antero-posterior length of hyoid bone was associated with AHI and predicted the severity of sleep apnea in male patients. This finding supports the role of expansion hyoidplasty for treatment of sleep apnea. Pre-operative consideration of these parameters may improve surgical outcomes in male patients with sleep apnea.     

H型高血压合并阻塞性睡眠呼吸暂停低通气综合征的观察

目的:探讨H型高血压与阻塞性睡眠呼吸暂停低通气综合征(OSAHS)的相互关系。方法:选择2013年10月至2014年8月在上海市浦南医院心内科就诊的78例高血压住院患者,血浆同型半胱氨酸(Hcy)水平≥10μmol/L为H型高血压、血浆Hcy水平10μmol/L为单纯性高血压。两者分别用便携式睡眠监测仪(PMD)检测,比较两组结果的差异。结果:H型高血压组的呼吸暂停低通气指数(AHI)高于单纯性高血压组(P0.05),H型高血压组的OSAHS发病率与单纯组无差异(P0.05),在有OSAHS的高血压病人中,H型高血压组有较高的中重度OSAHS的发病率(P0.01)。结论:在高血压患者中,没有发现血浆Hcy水平与OSAHS相关。但是一旦存在OSAHS,则合并H型高血压患者中出现中重度OSAHS的概率较高。     

阻塞性睡眠呼吸暂停综合征与心血管相关受体的研究进展

阻塞性睡眠呼吸暂停综合征是一种涉及呼吸科、耳鼻喉科、口腔科、神经科、心血管科、血液内科等多学科的疾病.在心血管疾病方面,阻塞性睡眠呼吸暂停综合征主要与高血压、冠心病、心力衰竭、心律失常等疾病的关系密切;在内分泌系统疾病方面,阻塞性睡眠呼吸暂停综合征与肥胖、糖尿病、甲状腺系统疾病等的相互联系.阻塞性睡眠呼吸暂停综合征与各疾病相互作用机制十分复杂,目前阻塞性睡眠呼吸暂停综合征与心血管疾病关系密切,已成为研究热点.阻塞性睡眠呼吸暂停综合征是心血管疾病独立的危险因素,正确认识两者的关系对于今后防御和治疗心血管疾病有重大意义.这里主要关于阻塞性睡眠呼吸暂停综合征与心血管相关受体的相互关系进行综述.     

Association between Glaucoma and Obstructive Sleep Apnea Syndrome: A Meta-Analysis and Systematic Review

BackgroundObstructive sleep apnea syndrome (OSAS) is a common disease that increases the risk of diabetes, heart disease, and stroke. However, studies of an association between OSAS and glaucoma neuropathy have reported controversial findings.ObjectiveThe main purpose of this study was to evaluate whether a significant association exists between OSAS and glaucoma by performing a meta-analysis of previous studies.MethodsA comprehensive literature search using the PubMed and Embase databases was performed to identify cross-sectional, case-control, and cohort studies related to the topic. We estimated a pooled odds ratio (OR) for the association between OSAS and glaucoma, by a fixed- or random-effects model.ResultsIn total, 16 studies with 2,278,832 participants met the inclusion criteria: one retrospective cohort study reported an adjusted hazard ratio of glaucoma of 1.67 (95% CI = 1.30–2.17). Using a fixed-effects model, the pooled OR of six case-control studies was 1.96 (95% CI = 1.37 2.80). A significant association was also identified in a meta-analysis of nine cross-sectional studies using a random-effects model, which showed a pooled OR of 1.41 (95% CI = 1.11 1.79). However, the reported pooled estimates for case control studies and cross-sectional studies were based on unadjusted ORs.ConclusionsOur results suggest that OSAS is associated with the prevalence of glaucoma. However, this result was based only on unadjusted estimates. Prospective cohort studies designed to take into consideration potential confounders, or examination of data from interventional trials to determine whether a reduction in OSAS status is associated with a reduced incidence of glaucoma, are needed to clarify whether OSAS is an independent risk factor for glaucoma.