• Korean Journal of Bronchoesophagology
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• v.5 no.2
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• pp.113-118
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• 1999

Background & Objectives : Nasal resistance which is halfly responsible for airway resistance is known to be influenced by hypoxia, hypercapnia, exercise, pregnancy, alcohol, ammonia and smoking. Smoking is a common part of our sociocultural environment and we have many a times been introduced to its various adverse effects, which have usually been more focused on lung problems. The purpose of this study is to determine any relationship between smoking and nasal resistance and to evaluate it's effective sites. Materials and Methods : Acoustic rhinometry was performed in 25 smokers and 25 nonsmokers who had no nasal symptoms nor abnormal rhinoscopic findings, and used an acoustic rhinometry to measure the distance from nose-piece to the C-notch, cross sectional area at the C-notch, and volume of the nasal cavity from nose-piece to 7cm. The authors compared the data between the two groups. Results : The cross sectional area at the C-notch was significantly decreased(p<0.05) in smoking group. The distance to the C-notch and the volume of nasal cavity were decreased likely in smoking group but there were no significant difference(p>0.05). Conclusion : Smoking reduced the cross sectional area at the C-notch, so increased the nasal resistance. The underlying mechanisms seems to be decreased nasal mucosal reactivity and congestion of the nasal mucosa. The authors believe there should follow more studies on pathophysiologic mechanisms and the histopathologic changes which involve the effect of smoking on nasal structures.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.32 no.6
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• pp.580-587
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• 2006

Necrotizing fasciitis has been recognized as a potentially lethal and rapidly progressing infection. Necrotizing fasciitis of head and neck area is rare but fatal disease that should be prompt diagnosis and recognition. If not promptly recognized and treated, infection can spread into the deep spaces of the neck and compromise the airway. It may also spread into the mediastimum producing life threatening sepsis. In this report, we describe the treatment of 4 cases of necrotizing fasciitis of head and neck area and discuss diagnosis, treatment, complication and consideration with review of literatures.

• The korean journal of orthodontics
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• v.51 no.4
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• pp.231-240
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• 2021

Objective: This outcome analysis study evaluated the actual positions of the orthodontic miniplate and miniplate anchoring screws (MPASs) and the risk factors affecting adjacent anatomic structures after miniplate placement in the mandibular incisal area. Methods: Cone-beam computed tomographic images of 97 orthodontic miniplates and their 194 MPASs (diameter, 1.5 mm; length, 4 mm) in patients whose miniplates provided sufficient clinical stability for orthodontic treatment were retrospectively reviewed. For evaluating the actual positions of the miniplates and analyzing the risk factors, including the effects on adjacent roots, MPAS placement height (PH), placement depth (PD), plate angle (PA), mental fossa angle (MA), and root proximity were assessed using the paired t-test, analysis of variance, and generalized linear model and regression analyses. Results: The mean PDs of MPASs at positions 1 (P1) and 2 (P2) were 2.01 mm and 2.23 mm, respectively. PA was significantly higher in the Class III malocclusion group than in the other groups. PH was positively correlated with MA and PD at P1. Of the 97 MPASs at P1, 49 were in the no-root area and 48 in the dentulous area; moreover, 19 showed a degree of root contact (19.6%) without root perforation. All MPASs at P2 were in the no-root area. Conclusions: Positioning the miniplate head approximately 1 mm lower than the mucogingival junction is highly likely to provide sufficient PH for the P1-MPASs to be placed in the no-root area.

• The korean journal of orthodontics
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• v.47 no.6
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• pp.353-364
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• 2017

Objective: The objective of this study was to investigate the effects of miniscrew-assisted rapid palatal expansion (MARPE) on changes in airflow in the upper airway (UA) of an adult patient with obstructive sleep apnea syndrome (OSAS) using computational fluid-structure interaction analysis. Methods: Three-dimensional UA models fabricated from cone beam computed tomography images obtained before (T0) and after (T1) MARPE in an adult patient with OSAS were used for computational fluid dynamics with fluid-structure interaction analysis. Seven and nine cross-sectional planes (interplane distance of 10 mm) in the nasal cavity (NC) and pharynx, respectively, were set along UA. Changes in the cross-sectional area and changes in airflow velocity and pressure, node displacement, and total resistance at maximum inspiration (MI), rest, and maximum expiration (ME) were investigated at each plane after MARPE. Results: The cross-sectional areas at most planes in NC and the upper half of the pharynx were significantly increased at T1. Moreover, airflow velocity decreased in the anterior NC at MI and ME and in the nasopharynx and oropharynx at MI. The decrease in velocity was greater in NC than in the pharynx. The airflow pressure in the anterior NC and entire pharynx exhibited a decrease at T1. The amount of node displacement in NC and the pharynx was insignificant at both T0 and T1. Absolute values for the total resistance at MI, rest, and ME were lower at T1 than at T0. Conclusions: MARPE improves airflow and decreases resistance in UA; therefore, it may be an effective treatment modality for adult patients with moderate OSAS.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.36 no.6
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• pp.497-501
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• 2010

Primary nasal type natural killer (NK)/T cell (NKTC) lymphoma, a specific form of malignant lymphoma, has a higher geographic incidence in Oriental, Mexican, and South American populations than the Western population. In Koreans, it comprises 9-12% of all cases of non-Hodgkin's lymphoma. This type of lymphoma has also been named as angiocentic lymphoma and lethal midline granuloma because the most common site is the upper airway area and its clinical aggressiveness presents with a necrotic and destructive pattern. NKTC lymphoma can also be detected in different organs (testis, spleen, parotid gland, skin, gastroinstinal tract, central nervous system, lungs, bone marrow, etc.) other than the upper airway including the oral cavity. The lymphoma detected in the oral cavity shows various destructive and inflammatory changes, similar to the signs of inflammation and infection from periodontitis and pulpal disease, making a diagnosis difficult with just the clinical signs. For early detection, clinical, radiological, and pathological examinations are required. This report describes the clinical, radiological and histological characteristics with a case report for the early detection of NKTC lymphoma in the oral cavity.

• Journal of Yeungnam Medical Science
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• v.22 no.1
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• pp.104-112
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• 2005

Because of location, a mediastinal mass may cause complications such as a major airway obstruction, a superior vena caval obstruction, and cardiac compression during general anesthesia. The patient's condition need to be assessed by several methods to predict the risks associated with general anesthesia. The authors took computed tomographs for a preoperative evaluation of two patients with an anterior mediastinal mass, and the risk of perioperative complications was predicted by measuring the tracheal area. The patients were managed according to the preoperative evaluation but severe ventilation impairments were encountered during anesthesia. In one patient, stable ventilation could not be maintained until spontaneous breathing appeared. The operation was cancelled and the patient was brought into the ICU. In the other patient, a tracheal tube was inserted deeper in an attempt to pass the narrowed tracheal portion due to mediastinal tumor compression resulting in improved ventilation.

• Journal of Chest Surgery
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• v.33 no.8
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• pp.688-692
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• 2000

Descending Necrotizing Mediastinitis(DNM) is a complication of oropharyngeal infections that can spread to the mediastinum. It is difficult to diagnose early because clinical and radiologic findings appear in the late stage of the infection. late diagnosis is the principal reason for the high mortality in DNM. An 18-year-old female admitted with Ludwig's angina from dental caries. Despite of combined antibiotics, dental extraction and drainge of submental abscess, infection spread to the cervical area. Chest computed tomogram revealed extension of the abscess to the pretracheal and periaortic space and development of bilateral pleural empyema. We performed bilateral cervical mediastinotomy and thoracotomy for drainage and debridement. Tracheostomy to secure the airway and postoperative pleural irrigation were performed. Postoperative course was uneventful and patient was discharged on the 40th postoperative day. It is important to perform chest CT scanning for early diagnosis of DNM when oropharyngeal infection spreads to the cervical area. Improved survival of patients with DNM implies early and radical surgical drainage and debridement via a cervical mediastinomy and thoracotomy.

• Maxillofacial Plastic and Reconstructive Surgery
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• v.34 no.1
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• pp.81-84
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• 2012

Gunshot wounds are unpredictable and require early, precise diagnosis and treatment. A penetrating gunshot wound can be fatal due to compromised airway, hypovolemic shock, lead poisoning and infection. This case report describes a 48-year-old male patient who had a suicidal gunshot wound on the right temporomandibular joint area using an air rifle. We successfully managed the patient by preoperative embolization, surgical removal of the foreign body and primary closure.

• Journal of Veterinary Clinics
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• v.1 no.1
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• pp.53-61
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• 1984

Among the 308 breeding pigs imported via airway from Canada, 15 pigs died from the respiratory disease. Three of the carcases were examined by pathological and bacteriological means. In the lungs of the necropsied cases there was a lobar pleuropneumonia characterized by parenchymal hepatization, carnification and extensive adhesion between the thoracic organs due to fibrinous pleural thickening. Histologically the affected lungs had lesions of thrombosis and coalesced area of necrosis delineated by packed macrophages. A strain of Haemophilus Pleuropneumoniae was isolated from the affected lungs. The isolate was serologically identified as serotype 5.

• Journal of Korean Public Health Nursing
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• v.10 no.1
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• pp.106-117
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• 1996

This study aims to provide information about the acute poisoning patients transferred by 119 ambulance service for nurses and emergency medical technicians. The data is based on 119 ambulance services patients charts of Seocho area in Seoul. The results were as follows: 1. Total number of emergency patients all over the country has been nearly fourtimes in 1995 compared to 1991. Total number of emergency patients were 322.051 in 1994. 2. About $35\%$ of total E.R. patients were transferred by 119 ambulance services in Seoul in the last 5years. Acute drug intoxication patients occupied $2-3\%$ of E.R. patients in Seoul. 3. About $4\%$ of E.R. patients in Seoul were transferred by 119 E.R. services of Seocho area in Seoul in 1995. Among them $2.4\%$ patients were drug intoxication patients. 4. Data were collected from available patients of 119 ambulance services from Jan. 1993 to Dec. 1995 in Seocho area. Total poisoning patients were 184. - The female/male ratio was 69.7:30.4 and most of patients$(69.7\%)$ were in the age of 20th and 30th. - The busy time of calling 119 ambulance service was from 6P.M. to midnight$(37.5\%)$ - It took within 10 minutes for patients$(62.8\%)$ from notification to arrival in hospital. - Regarding poisoning substances. hypnotics $(22.8\%)$, tranquilizer$(14.7\%)$, agricultural agents$(6.0\%)$ rodenticide$(27\%)$ and others $(10.3\%)$ were in order and unknown were $43.5\%$. - Most of the patients or protector $(72.8\%)$ chose hospitals. Among them $(87.3\%)$ were general hospital. - The most predominant symptoms were coma$(22.3\%)$. dizziness$(6.5\%)$ and then allergy. vomiting. gastrointestinal cramps etc. - Airway management and oxygen administration together was the main medical control of prehospital emergency medical services$(33.7\%)$. It is proposed that first, a systematic survey of drug intoxication patients must be conducted to give an appropriate prehospital emergency care for the emergency medical technician and second, a wide and regular public education to improve understanding of first aids should be undertaken.