흡연이 비저항에 미치는 영향

오천환,김장욱,Oh, Cheon-Hwan,Kim, Jang-Wook 대한기관식도과학회 1999 大韓氣管食道科學會誌 Vol.5 No.2

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.

구개편도에서 발생한 MALT 림프종 1례

오천환(Cheon Hwan Oh),이용만(Yong Man Lee),장영도(Young Do Jang) 대한두경부종양학회 2007 대한두경부 종양학회지 Vol.23 No.2

Mucosa-Associated Lymphoid Tissue(MALT) lymphoma is the most common extranodal B cell lymphoma among peripheral one. Although palatine tonsil is common origin among Waldeyer’s ring, there is no presented case in Korea. This lymphoma is known to be less invasive than other subtype of low grade B cell Non-Hod-gkin lymphoma. Because MALT lymphoma has a tendency of localizing one area for a long time, there are many cases treated by local treatment like radiotherapy, or local excision and radiotherapy. We report a case of MALT lymphoma originated from left tonsil.

경동맥 절제술 및 치환술 1례

김대식,오천환,Kim, Dea-Sik,Oh, Cheon-Hwan 대한기관식도과학회 1999 大韓氣管食道科學會誌 Vol.5 No.2

A carotid artery resection and replacement including neck dissection are used as a method of treatment for head and neck cancer with infiltration into the carotid artery. The recent development of imaging technique makes it easy to estimate the detailed anatomical relationship between the tumor infiltration into the carotid artery, it's resection and replacement are indicated at radical neck dissection. To detect any possibility of cerebral ischemia at the time of ligation of carotid artery, a temporary occlusion test of internal carotid artery with a ballon catheter (balloon occlusion test) is performed. Recently, we performed a carotid artery resection and replacement using an artificial vessel Gore-Tex) in a case of neck cancer with infiltration into the carotid artery.

대기 배출 사업장의 알데하이드류 배출특성

황철원(Cheol-Won Hwan),김인구(In-Goo Kim),김세광(Se-Kwang Kim),오천환(Cheon-Hwan Oh),김태현(Tae-Hyun Kim),정병환(Byeong-Hwan Jeong),임주혁(Ju-Hyeok Im),문혜란(Hye-Ran Moon),김종수(Jong-Soo Kim) 한국환경보건학회 2018 한국환경보건학회지 Vol.44 No.2

Objectives: The emission characteristics of aldehydes were investigated in five industries for the efficient management of aldehydes. Methods: Aldehydes and THC were measured from the stack and boundary of facilities. The relative concentrations and odor contribution of aldehydes were evaluated. Results: The concentrations of aldehydes in the asphalt manufacturing and printing industries were relatively high. Formaldehyde met emission limits for all facilities. According to the odor contribution analysis of aldehydes, i-valeraldehyde and butyraldehyde, which have a relatively low odor threshold value, were found to be the major odor-causing substances in the painting and textile processing industries. Conclusions: Among the aldehydes, the major emission compounds were formaldehyde in asphalt manufacturing, acetaldehyde in the paper manufacturing and textile processing industries, and butyraldehyde in the printing and painting industries. Therefore, to increase the effectiveness of aldehyde reduction, proper control devices need to be installed and operated according to the emission characteristics of aldehydes.

폐수배출사업장의 이온물질 배출 특성 조사

박기범(Ki-Bum Park),김요용(Yo-Yong Kim),오천환(Cheon-Hwan Oh),남우경(Wo-Kyung Nam),김수현(Soo-Hyun Kim),오민영(Min-Young Oh),서수정(Soo-Jung Seo),김태화(Tae-Hwa Kim) 대한환경공학회 2020 대한환경공학회 학술발표논문집 Vol.2020 No.11

두경부암종 수술 후 결손부위 재건에 사용된 유리피판술 51예의 고찰

이승원(Seung Won Lee),김재욱(Jae Wook Kim),김용배(Yong Bae Kim),탁민성(Min Sung Tak),신호성(Ho Sung Shin),장혁순(Hyuck Soon Chang),오천환(Cheon Hwan Oh),박진규(Jin Gyu Park),고윤우(Yoon Woo Koh) 대한두경부종양학회 2007 대한두경부 종양학회지 Vol.23 No.1

Background and Objectives :Microvascular free flap reconstruction has been revolutionized in last two deca-des, and became a standard option in the reconstruction of head and neck defects. We intended to review our experiences of 51 microvascular free flap for head and neck defects during 5-year period and to analyze the types of flaps according to primary sites, success and complication rates. Subjects and Methods :From Oct. 2001 through Dec. 2005, fifty one free flap reconstructions were performed in forty nine patients at ENT department of Soonchunhyang university bucheon hospital. Primary sites, pathology, T-stage, operative time, time interval of oral feeding, and various reconstructive factors such as recipient and donor vessels, free flap related complications, failure rates and salvage rates were retrospectively analyzed. The relation between complication rates and preoperative risk factors were statistically analyzed. Results :Methods of reconstruction were radial forearm free flap(RFFF)(n=28, 54.9%), anterolateral thigh free flaps(n=9, ALTFF)(17.6%), rectus abdominis free flap(n=7, RAFF)(13.7%), jejunal free flap(n=5, JFF) (9.8%), and miscellanous(n=2, 4.0%) in order. In free flap related complications, failure of free flap occurred in seven cases(13.7%) and pharyngocutaneous fistula occurred in five cases(9.8%) among fifty one free flaps. The overall success rate of free flaps was 86.3%. Salvage of free flaps was possible only one among eight cases(12.5%). In positve preoperative risk factor groups, failure of free flap was higher than in negative risk factor group. However, it was not statistically significant. Conclusion :We confirmed that free flap reconstructions are highly versatile and reliable options for use in the reconstruction of various soft tissue defects of the head and neck. Free flaps have gained great popularity given its versatility, ability for a two-team approach, and minimal donor site morbidity. However, complications related to microvascular surgery may be overcome by increased surgical experience and by intensive flap monitoring in early postoperative period.

Lidocaine이 가토의 청성뇌간유발반응에 미치는 영향

오천환,박찬일 충남대학교 의과대학 지역사회의학연구소 1997 충남의대잡지 Vol.24 No.1

The effect of lidocaine on the auditory pathway was studied to evaluate the mechanism of action of lidoncaine by auditory brainstem respose(ABR) in rabbits following intravenous injection, intratympanic bulla application and intrameatal iontophoresis of lidocaine. The changes of ABRs with the similar pattern and the transient delay of wave latencies were observed after administration of lidocaine all animals of different groups. And the prolongation of ABR wave latency was noted in all waves, not any one wave. The results suggest that the principal effect of lidocaine might be the delay of conduction times through the auditory pathway, caused with effect of lidocaine on the central nervous system through the circulatory system and alteration of perilymph lidocaine concentrations in the different routs of administrations of lidocaine

상악동에 발생한 기종 2예

오천환,이용만 순천향의학연구소 2004 Journal of Soonchunhyang Medical Science Vol.10 No.2

Pneumocele of the paranasal sinus refers to an abnormal expansile cyst-like lesion of an air containing sinus, presumably by obstruction of the sinus ostium due to infection, tumor, trauma or surgery. A one-way valve the nasal cavity and the affected sinus leads to increased antral pressure and sinus expansion after sneezing or nose blowing. The patients usually complain of slowly changing facial contours and dull pain in the affected area. Pneumocele of the paranasal sinus is rare, the frontal sinus is most commonly affected, followed by the ethmoid and the sphenoid sinus. The maxillary sinus is very rare and Noyek and Zizmor reported for first time in 1974. The authors have experience two cases of maxillary sinus pneumocele, so report with review of literatures.

甚한 牙關緊急을 일으킨 頰骨骨折에서 Foley Catheter를 이용한 整復術 1例

鄭然卓,吳天煥 순천향대학교 1985 논문집 Vol.8 No.2

The classic zygomatic or malar fractures, sometimes referred to as tripod fractures, involve a break of the infraorbital rim through and at the level of the infraorbital foramen, a break at the zygomaticofrontal suture, and a break through the zygomatic arch. Variable deformity in facial contour results, occaisonally with trismus due to impingement of the arch fracture upon the temporalis muscle and associated fractures of the orbital floor, nose and maxilla are not uncommon. The “stepping off”deformity or notching of the infraorbital rim is characteristic and flattening of malar eminence and infraorbital nerve hypoesthesia will reveal. Reduction of the existing fractures and stabilization, often direct wiring, are usually required. Recently the authors have experienced a case of left malar fracture with severe trismus, treated by Foley catheter ballooning in maxillary antrum in place for 12 days after reduction and elevation through Caldwell-Luc approach. This was performed under general anesthesia with blind orotracheal intubation after 2% pontocaine in nasal cavity.

특발성 이명에 대한 임상적 양상

정윤영,오천환 순천향의학연구소 1999 Journal of Soonchunhyang Medical Science Vol.5 No.1

Tinnitus is noise from ear or head without any external sound stimulation and can cause hearing difficulties, psychogenic disturbances or many difficulties in everyday life. The etiology has yet been discussed and the management is also very difficult. Our study was performed to evaluate the clinical characteristics of idiopathic tinnitus. Three hundred thirty five patients(417 ears) with idiopathic tinnitus were entered into our department's database between Nov. 1995 and Oct. 1997. The patients were fully questioned about their history, and then were physically examined and assessed audiometrically, including pure tone audiogram and tinnitogram. It was found that (1) there was no sexual difference, (2) average age was 48.5 years, (3) there was no laterality, (4) buzzing sound was the most common, (5) average symptom duration was 575.7 days, (6) the most common sensation level was within 5dB, (7) the most common loudness was less than 29dB, and (8) the most common frequency was over 8000Hz.