• Journal of Chest Surgery
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• v.37 no.4
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• pp.386-389
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• 2004

Descending nectorizing mediastinitis (DNM). represents a virulent form of mediastinal infection requiring prompt diagnosis and treatment to reduce the high morbidity mortality associated with this disease. Intr. avenous broad-spectrum antibiotic therapy alone is not efficient without adequate surgical drainage of the cervical and mediastinal collections, extensive debridement and excision of necrotic tissue, and wide mediastino-pleural irrigation. A 38-year-old man admitted via emergency room with painful left neck swelling and uncontrolled high fever. Chest computed tomogram showed left paratracheal abscess descending into the superior and anterior mediastinum. Transcervical mediastinal drainage was performed with 26 Fr. chest tube and left paratracheal drainage was performed with Penrose drain in urgency. Culture and sensitivity test grew Yeast. The drains removed via gradually shortening on day 39 after surgery.

• Journal of Chest Surgery
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• v.34 no.8
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• pp.644-647
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• 2001

Lamierre's syndrome is characterized by a rare fulminant condition resulting from primary oropharyngeal infection followed by secondary septic thrombophlebitis of the internal jugular vein and metastatic infection. A forty-year-old man who had been on ventilator due to servere chest trauma, showed severe reddish inflammatory swelling of the right cervical soft tissue and newly developed pneumonia. He went into in septic condition shortly thereafter. Thrombophlebitis with central abscess in the right internal jugular vein was identified by neck CT and MRA(magnetic resonance angiography). Right cervical swelling worsened in spite of clindamycin and heparin therapy. We performed immediate surgery for removal of septic thrombus and resection of internal jugular vein. Patient's septic condition, pneumonia, and local inflammatory reaction were improved within several days after surgery.

• Journal of Yeungnam Medical Science
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• v.9 no.1
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• pp.167-174
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• 1992

Microvascular tissue transfers have facilitated primary closure of various complex defects after radical ablation of head and neck cancers. From Oct 1991 to Feb 1992, we used forearm free flap in two patients and delto-pectoral flap in one patient who had preoperative irradiation for pharyngoesophageal reconstruction. The stricture and fistular formation were most troublesome complication in forearm free flap, so we designed as lazy S shape in distal flap margin to prevent circular contraction and longitudinal margin was deepithelized(5mm) and sutured double layer to withstand fistular formation and this can be considered useful in place of a free jejunal transfer.

• Korean Journal of Head & Neck Oncology
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• v.7 no.2
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• pp.104-113
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• 1991

선양낭암은 타액선종양중 비교적 드문 악성종양으로 병리조직학적 및 임상적으로 독특한 양상을 보인다. 병리조직학상 종양세포가 신경주변으로 침범하여 수술당시 적절한 수술연을 얻기 어렵고 이에 따른 국소재발이 거듭되고 임파선전이 및 예측치 않는 원격전이가 생기기도 한다. 지금까지 선양낭암환자의 예후에 영향을 미치는 여러 요인들에 대한 연구들이 이루워지고 있는데 그중 조직학적 분화도, 원발부위, 종양의 크기, 수술연의 상태와 임상적 병기들이 중요시되고 있다. 이에 저자들은 1960년부터 1980년 까지 텍사스대학 M.D. Anderson 암센터에서 치료받은 이하선 및 악하선 선양낭암 각각 13례와 26례를 대상으로 원발부위가 환자의 생존 및 치료에 미치는 영향을 알고자 다른 예후인자로 알려진 조직병리학적 소견들과 함께 통계학적 분석을 실시하였다. 이하선과 악하선에 생긴 선양낭암을 비교한 결과 이하선에 생긴 경우 조직학적 분화도가 더 낮았고 악하선 종양에서 수술연에 종양침범율이 더 적었다. 경부 임파절 전이는 악하선 종양에서 많았으나 반면 원격전이는 이하선 종양에서 더 많이 발생하였다. 그러나 종양의 크기, 선경주위침범 유무, 국소재발과 환자의 생존율사이에는 의의있는 상관 관계는 없었다. 이하선과 악하선에 생긴 선양낭암의 여러 특성들과 생존률간의 univariate 분석결과 악하선에 생긴 선양낭암 환자에서 종양이 크거나 조직학상 분화가 나쁘거나(solid pattern), 경부임파절 전이와 원격전이가 생기면 예후에 나쁜 영향을 끼침이 밝혀졌다. 그러나 이하선에 생긴 경우 분석례가 너무 적어 결론을 내리기에 불충분하였다. 원발부위에 따른 선양낭암 환자들의 특성을 chi-square 검정법을 이용하여 통계학적으로 분석한 결과 이 두군간에는 의의있는 통계학적 차이는 발견할 수 없었다.

• Korean Journal of Head & Neck Oncology
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• v.29 no.2
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• pp.37-40
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• 2013

Background and Objectives : To assess the usefulness of computed tomography image before papillary thyroid cancer surgery, focus on confirmation of lateral cervical lymph node metastasis not detected by ultrasonography. Material and Methods : From January 2008 to May 2009, total 150 patients who had undergone thyroid surgery and been confirmed papillary thyroid cancer pathologically were enrolled. They had taken neck computed tomography following the ultrasonography. Results : Computed tomography had found suspicious metastatic lateral neck lesion in 13 patients. After the image study, lateral neck lymph node dissection had been included in their surgical plan. Of these, only 7 cases were confirmed pathologically lateral neck lymph node metastasis(positive predictive value=0.54). Taken as whole 150 patients, additionally 4.7% of patients confirmed lateral neck lymph node metastasis by preoperative computed tomography. Conclusion : If preoperative ultrasonography was performed precisely, additional benefits that could be achieved by computed tomography were not much.

• Journal of the Korean Society of Radiology
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• v.1 no.3
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• pp.35-40
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• 2007

The purpose of this study was to investigate in S city of Chung-Nam using direction radiation Cervical spine among patient enforcing AP view, lateral view, total 113 subjects(40-year-old low)by target examine and got following as: 1) Distribution of age 14~40 years old 57 men (50.4%), woman 56subjects(49.6%)be, and age group 30~40year old 80subjects(70.8 %), 20~29year old 27subjects(23.9%). 2) It appeared most by 81subjects(71.7%) that can not know cause though traffic accident, misstep, cause ignorantness were investigated to revealed by the chronic 87subjects(77%) appeared by thing which statistical significance is with occurrence cause. 3) 20 Among whole 113subjects 20~29years old 27 subjects(23.9%), 30~40years old 80 subjects(70.8%) manifestationacute form of a disease, the chronic all high distributionsee. 4) This investigator left shoulder region pain among 39 subjects whole 113 subjects (left to direction that could know that is each main pain in 34.5 %), cervical vertebral portion upside 31 subjects(27.4%), both shoulder region pain 20 subjects(17.7%), and becomes left side scoliosis 62 subjects(54.9%)by the most frequencies appear. 5) Appeared antespondylolisthesis by all curve 48 subjects(42.5 %) in curve direction and at Systolic blood pressure from 160mmHg to all 19 subjects (before total 69 subjects (61.0 %) at 16.8 %), Diastolic blood pressures curve 31 subjects(27.4 %) by 100 mmHg appear.

• Proceedings of the KSR Conference
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• 2004.06a
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• pp.386-391
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• 2004

일반적으로 철도수요를 추정할 때에는 매표실적에 근거한 직접수요모형(Direct Demand Model)을 많이 사용하여왔다. 고속철도가 2004년 4월 개통됨으로써 실행된 수요가 나옴에 따라 이를 이용하여 KTX와 일반철도를 고려한 직접수요모형의 작성이 가능하게 되었다. 따라서 본 논문에서는 고속철도 운행 전${\cdot}$후의 실제수요를 이용하여 고속철도 개통 전${\cdot}$후의 직접수요모형을 추정하여보았다. 모형에 사용되는 변수로는 철도서비스, 사회경제지표 등을 사용하였다. 그 중 철도서비스, 즉 운행시간, 운행빈도, 운임 등을 집중적으로 사용하여 모형을 작성하였다. 이렇게 작성된 모형은 KTX와 일반철도, 일반철도 등급간에서 철도서비스 변수의 기여를 명시적으로 제시해준다. 개발된 모형을 이용하여 KTX 및 일반철도의 운행방향에 대하여 검토하였다.

• Proceedings of the KIPE Conference
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• 2015.07a
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• pp.251-252
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• 2015

본 논문에서는 단상 CCM boost PFC 컨버터의 높은 입력 경부하 역률 향상을 위한 제어 기법을 제안한다. 기존 CCM boost PFC 제어기법은 인덕터 전류를 입력 전류와 동기화 하여 제어 하여 낮은 입력 또는 중 부하 이상에서 높은 역률을 얻을 수 있다. 하지만 높은 입력 전압 조건에서 경 부하 동작 시 EMI 필터에 의해 발생되는 무효 전류로 인하여 입력 전류를 위상이 앞서게 되고 역률이 큰 폭으로 저하된다. 제안하는 제어 기법은 전류 지령 보정과 더불어 개선된 시비율 전향 기법을 이용하여, 높은 입력 전압에서 경 부하 동작 시 입력 전류의 위상을 입력 전압과 동기화 시켜 높은 역률을 얻는다. 따라서 제안하는 제어기법의 경우 전 입력 및 전 부하 조건에서 단위 역률에 근접한 역률을 얻을 수 있으며, 이는 높은 신뢰성을 위해 병렬로 구성된 high-end 파워 시스템에 적합하다.

• Nuclear Medicine and Molecular Imaging
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• v.43 no.5
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• pp.411-420
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• 2009

Purpose: The aim of this study was to investigate the usefulness of $^{18}F$-FDG PET/CT with neck ultrasonography (neck US) in patients with recurrent, papillary thyroid cancer. Material and methods: This retrospective study (December 2006 to April 2008) enrolled sixty-one patients (ninety-one lesions) who underwent high-dose $^{131}I$-ablation therapy after total thyroidectomy, and evaluated recurred papillary thyroid cancer. All lesions were confirmed by histopathology and compared histopathologic findings to PET, PET/CT, and neck US findings. Results: In sixty-one patients (57 women, 4 men; age range, 24-81 years, mean 49 years; 61 papillary carcinomas), the sensitivity, specificity, accuracy of $^{18}F$-FDG PET/CT was 87.2%, 64.0%, 78.1% on a patient basis and 92.3%, 66.7%, 80.9% on a lesion basis, respectively. The sensitivity, specificity, accuracy of $^{18}F$-FDG PET was 71.8% (p=0.03), 59.0% (p=1.00), 67.2% (p=0.03) on a patient basis and 78.8% (p<0.01), 64.1% (p=1.00), 72.5% (p=0.02) on a lesion basis, respectively. The sensitivity, specificity, accuracy of neck US was 71.1% (p=0.07), 52.2% (p=0.75), 63.9% (p=0.05) on a patient basis and 71.2% (p<0.01), 61.5% (p=1.00), 67.0% (p=0.06) on a lesion basis, respectively. Combined $^{18}F$-FDG PET/CT with neck US improved the sensitivity, specificity, accuracy to 94.7% (p=0.50), 82.6% (p=0.13), 90.2% (p=0.03) on a patient basis and 96.2% (p=0.50), 89.7% (p<0.01), 93.4% (p<0.01) on a lesion basis, respectively. Conclusion: $^{18}F$-FDG PET/CT demonstrated significantly higher sensitivity than neck US for the detection of recurred papillary thyroid cancer lesions. Furthermore, combined $^{18}F$-FDG PET/CT with neck US showed more improved sensitivity, specificity, accuracy for diagnosis of recurrent papillary thyroid cancer.

• Tuberculosis and Respiratory Diseases
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• v.65 no.4
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• pp.277-284
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• 2008

Background: In principle, cervical tuberculous lymphadenitis (CTBL) is a medical disease that may require surgical treatment, particularly in young women who complain of psychosocial and cosmetic problems. We encountered 13 cases of aggravated CTBL treated surgically despite the appropriate course of antituberculous chemotherapy. We report the clinical characteristis of these cases. Methods: The clinical data of 13 patients with aggravated CTBL requiring surgical treatment from January 2000 to December 2006 at the Department of Chest Medicine, Internal Medicine and Plastic Surgery, National Medical Center was reviewed retrospectively. Results: Twelve of the 13 cases (92%) were female. The most common age was 21~30 years (69%). Multiple nodes were palpated in 11 cases (85%). The supraclavicular lymph nodes were sites the most commonly involved (54%). The other involved sites in the order of decreasing frequency were the jugular chain, posterior cervical, submandibular and infraauricular lymph nodes. A palpable mass was the most commonsymptom. Neck pain was reported in 3 cases (23%). General symptoms such as weight loss, fatigue, anorexia and night sweats were noted in 5 cases (38%). Respiratory symptoms such as cough, sputum, hemoptysis, dyspnea and chest pain were observed in 4 cases (31%). Pulmonary tuberculosis was noted in 11 cases (85%). Other extrapulmonary tuberculosis coexisted in 4 cases (31%). This suggests that surgical CTBLs may be manifestations of a systemic disease and might be difficult to treat. Most cases (92%) were stages 2 and 3 at the initial diagnostic period but all cases fell into stage 4 and 5 when reassesed before surgery. The average duration of anti-TB chemotherapy before and after surgery was 10.2 and 15.2 months, respectively. The 13 patients were followed up until June. 2008. Among them, 2 cases had newly developed CTBL and the other 11cases showed no recurrence. Conclusion: In principle, CTBL is the medical disease. However, despite the appropriate course of anti-TB chemotherapy, CTBL can progress to a more advanced stages and grow rapidly to a large-sized or fistulous mass with a persistent abscess. Surgical treatment may be inevitable for patients with psychosocial and cosmetic problems caused by these masses, particularly in young women.