• Journal of Oral Medicine and Pain
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• 제26권4호
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• pp.369-376
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• 2001

Objectives : The purposes of the study was to evaluate cephalometric characteristics in snorers and patients with obstructive sleep apnea (OSA) and to see any relationships between the cephalometric measurements and respiratory disturbance indices (RDI). Materials and Methods : Twelve snoring patients, 11 patients with OSA, and 10 normal subjects were included for the study. After taking a screening sleep study for a night to obtain RDI, $SaO_2$, and snoring index, a detailed cephalometric analysis was conducted to obtain SNA, SNB, SN-MP, IAS, MAS, SPAS, SAAS, Mn-H, and PNS-P. All the data were compared between groups. For a group including 12 snoring patients and 11 OSA patients, correlation coefficients were calculated between respiratory disturbance index and each item of cephalometric measurements. Results : The mandible and the maxilla are retropositioned. The oropharyngeal and hypopharyngeal airway is reduced in area and is a factor that could produce or enhance OSA symptoms. The hyoid bone is displaced inferiorly. The soft palate is significantly elongated. Conclusions : These data suggest that cephalometric evaluation could be useful to evaluate snoring and OSA patients, and to assist with the planning treatment for improvement of upper airway patency.

• 공업화학
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• 제17권5호
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• pp.498-503
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• 2006

윤활유 첨가제 중간체로서 Alkenyl Succinic Anhydride (ASA)계열인 i-(2',5'-diketotetrahydrofuranyl)octadacenyl acid (OSA)를 oleic acid (OA)와 maleic anhydride (MA)의 ene-reaction을 통하여 합성하였다. 이 반응의 진행과정은 GC분석을 통해 관찰함으로써 확인하였다. 숙신이미드 화합물은 알킬아민과 OSA와의 반응에 의해 합성되었다. 이 숙신이미드 화합물들은 윤활유 첨가제로서 항유화성, 내마모성, 방청성능 등을 시험하였으며, 이때 상대적으로 긴 알킬사슬을 가진 octadecylamine 유도체가 우수한 물성을 나타내었다.

• Journal of Korean Biological Nursing Science
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• 제18권3호
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• pp.135-143
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• 2016

Purpose: This study was conducted to identify the factors associated with obstructive sleep apnea (OSA) risk in patients with metabolic syndrome (MS). Methods: Patients with MS between 30 and 74 years of age were recruited in an outpatient clinic of a cardiovascular center in Seoul, South Korea. MS and the risk of OSA were evaluated by Berlin questionnaire survey, the medical records of the participants were reviewed and a comprehensive lifestyle survey was performed. SPSS WIN 21.0 was used for statistical analysis. Results: BMI (OR: 1.31, CI: 1.14-1.51, p<.001) and lifestyle score (OR: 0.96, CI: 0.93-0.99, p=.028) were associated with the risk of OSA. Physical activity, weight control and diet were specifically associated with the risk of OSA after controlling for age, gender and BMI. Conclusion: This study demonstrated that lifestyle was an important factor associated with OSA risk in patients with MS.

• 수면정신생리
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• 제11권1호
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• pp.17-21
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• 2004

Nasal congestion is one of the most common symptoms of medical complaints. Snoring is caused by vibration of the uvula and the soft palate. Nasal obstruction may contribute not only to snoring and obstructive sleep apnea (OSA) but also impair application of continuous nasal positive airway pressure (CPAP), which is the most widely employed treatment for OSA. Total or near-total nasal obstruction leads to mouth breathing and has been shown to cause increased airway resistance. However, the exact role of the nasal airway in the pathogenesis of OSA is not clear and there is no consensus about the role of nasal obstruction in snoring and sleep apnea. Some reports have failed to demonstrate any correlation between snoring and nasal obstruction. On the other hand, opposing reports suggest that nasal disease may cause sleep disorders and that snoring can be improved after nasoseptal surgery. Reduced cross-sectional area causes increased nasal resistance and predisposes the patient to inspiratory collapse of the oropharynx, hypopharynx, or both. Discrete abnormalities of the nasal airway, such as septal deformities, nasal polyps, and choanal atresia and with certain mucosal conditions such as sinusitis, allergic rhinitis and inferior turbinate hypertrophy can cause snoring or OSA. Thus, these sources of nasal obstruction should be corrected medically or surgically for the effective management of OSA and adjunctive for CPAP.

• 수면정신생리
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• 제11권1호
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• pp.22-28
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• 2004

배 경 : 불면증은 다양한 수면장애에서 흔하게 나타날 수 있는 증상이다. 폐쇄성 수면 무호흡증에서 불면증 이외의 다른 여러 증상이 나타날 수 있으나, 폐쇄성 수면 무호흡증 환자가 불면증을 주된 수면 문제로 호소하는 경우도 드물지 않다. 폐쇄성 수면 무호흡증은 특수한 진단적/치료적 접근을 필요로 하므로 불면증을 호소하는 환자에서 폐쇄성 수면 무호흡증의 감별은 중요하다. 본 연구는 불면증을 주소로 하는 환자에서 폐쇄성 수면 무호흡증의 유병율과 그 감별인자를 조사하려고 하였다. 방법：1996년 6월부터 2002년 12월까지 불면을 주소로 수면다원검사실에 의뢰된 470명의 환자(남자 235명, 여자 235명, 평균 연령 $53.6{\pm}12.4$세) 환자들의 의무기록과 수면다원검사 결과를 분석하였다. 우선 불면증 환자에서의 폐쇄성 수면무호흡증 유병율을 조사하였다. 그리고, 폐쇄성 수면무호흡증을 동반한 불면증 군과 폐쇄성 수면무호흡증을 동반하지 않은 불면증군의 인구학적/임상적 특성을 비교하였다. 마지막으로 폐쇄성 수면무호흡증을 동반한 불면증 군 내에서 폐쇄성 수면무호흡증의 정도인 호흡장애지수와 인구학적/임상적 특성의 상관관계를 보았다. 결 과：총 연구대상 470명 중 125명(26.6%)에서 야간 수면다원검사로 폐쇄성 수면 무호흡증을 진단하였다. 폐쇄성 수면무호흡증을 동반한 불면증 군은 폐쇄성 수면무호흡증을 동반하지 않은 불면증 군에 비해 유의하게 연령이 높고($58.4{\pm}12.3\;years$ vs $51.8{\pm}11.2\;years$, p<0.01), 신체질량지수(body mass index；BMI)가 높았다($23.4{\pm}3.3\;kg/m^2$ vs $22.5{\pm}3.1\;kg/m^2$, p=0.44). 또한, 폐쇄성 수면무호흡증을 동반한 군에서 코골이가 더 흔하게 관찰되었으며(96.0% vs 63.5%, p<0.01) 남성의 비율이 높았으며(64.0% vs 44.9%, pp<0.01) 고혈압이 있는 경우(20.0% vs 9.3%, pp<0.01)가 많았다. 폐쇄성 수면무호흡증을 동반한 군내에서는 연령과 호흡장애지수가 유의한 양의 상관관계를 보였다(p=0.01). 결 론：불면을 주소로 내원한 환자들의 상당수가 폐쇄성 수면무호흡증을 가지고 있었다. 불면을 주소로 내원한 환자들에서 폐쇄성 수면무호흡증의 감별인자로 코골이, 고령, 남성, 고혈압, 그리고 비만을 찾을 수 있었다. 위 감별인자를 가진 환자들에서 야간 수면다원검사를 포함한 폐쇄성 수면 무호흡증에 대한 진단적 접근이 필요하다.

• 대한한의학회지
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• 제33권1호
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• pp.169-176
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• 2012

Objectives: Obstructive sleep apnea (OSA) is prevalent disorder, particularly among the middle-aged. In this study, we report a new approach to improve OSA using oriental medicine and acupuncture. Methods: Three men diagnosed with OSA were enrolled in this study. They took oriental medicine 3 times a day and were given acupuncture twice a week for about 4 months. Results: We analyzed apnea-hypopnea index (AHI), oxygen desaturation index (ODI), average saturation (AS) and lowest saturation (LS) before and after treatment. AHI highly decreased in all patients and ODI also decreased in two of the three patients. Conclusions: These results indicate that oriental medicine and acupuncture therapy was effective in the improvement of OSA. Further study in a larger group with severity grades is recommended.

• 수면정신생리
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• 제11권1호
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• pp.5-9
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• 2004

Obstructive sleep apnea (OSA) is a common disorder characterized by recurrent cessation of breathing due to complete or partial upper airway occlusion during sleep. The incompetent tone of palatal, pharngeal, and glossal muscles which fail to maintain airway patency during sleep causes narrowing of the airway dimension and increased resistance of breathing. The identification of the sites of upper airway obstruction in patients with OSA is important in understanding the pathogenesis and deciding the treatment modality of snoring and/or OSA. Various upper airway imaging modalities have been used to assess upper airway size and precise localization of the sites of upper airway obstruction during sleep. Dynamic imaging modalities enabled assessment of dimensional changes in the upper airway during respiration and sleep. This article focused on reviews of various upper airway imaging modalities, especially dynamic upper airway imaging studies providing important information on the pathogenesis of OSA.

• 대한치과의사협회지
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• 제57권5호
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• pp.270-278
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• 2019

Oral appliances therapy is becoming increasingly recognized as a successful treatment for snoring and obstructive sleep apnea(OSA). Compared with continuous positive airway pressure(CPAP), the gold standard therapy for OSA, oral appliance therapy are less efficacious for severe OSA but are more acceptable and tolerable for patients, which in turn, may lead to a comparable level of therapeutic effectiveness. Nevertheless, the various side effects of oral appliance therapy, such as, increased salivation or dryness, pain or discomfort in the teeth or gums, occlusal discomfort in the morning, temporomandibular disorders, dental and occlusal changes may cause discontinuation of treatment or changes in treatment plan. Therefore, oral appliance therapy should be provided by a qualified dentist who can evaluate oral tissues, occlusion, and temporomandibular joints, and prevent and manage the possible side effects.

• 대한치과의사협회지
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• 제57권5호
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• pp.288-295
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• 2019

Sleep-disordered breathing (SDB) is defined as a disturbed breathing during sleep caused by repetitive upper airway collapse. Complete collapse causes a cessation of breathing, known as obstructive sleep apnea (OSA) and snoring can arise from partial collapse. Undiagnosed and untreated OSA means recurrent intermittent hypoxemia and leads to a variety of cardiovascular disorders, disturbed neurocognition, and excessive daytime sleepiness. Various behavioral modalities have been suggested for treating snoring and sleep apnea including changing the sleep position, avoiding alcohol, and weight loss. Until now continuous positive airway pressure (CPAP) therapy is one of effective treatment for patients with OSA, but its discomfort causes less tolerance and compliance. Therefore, clinical effectiveness and convenience for oral appliance have emerged and the role of dentists has become more important in the management of OSA.

• 대한의용생체공학회:의공학회지
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• 제35권4호
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• pp.95-98
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• 2014

The baroreflex is one kind of homeostatic mechanisms to regulate acute blood pressure (BP) changes by controlling heartbeat interval (HBI). To quantify the effect of baroreflex, we suggested a new approach of analyzing Granger causality between systolic BP (SBP) and HBI. The index defined as baroreflex effectiveness (BRE) was generated by the hypothesis that more effectual baroreflex would be related to more effective Granger causal influence of SBP on HBI. Six obstructive sleep apnea (OSA) patients (apnea-hypopnea index, AHI ${\geq}5$ events/hr) and six normal subjects participated in the study. Their SBP and HBI during nocturnal sleep were obtained from a non-invasive continuous BP measurement device. While the BRE ($mean{\pm}SD$) of normal subjects was $47.0{\pm}4.0%$, OSA patients exhibited the BRE of $34.0{\pm}3.8%$. The impaired baroreflex function of OSA patients can be explained by the physiological mechanism associated with recurrent hypoxic episodes during sleep. Thus, the significantly lower BRE in OSA patients verified the availability of Granger causality analysis to evaluate baroreflex during sleep. Furthermore, the range of BRE obtained from normal subjects was not overlapped with that obtained from OSA patients. It suggests the potential of BRE as a new helpful tool for diagnosing OSA.