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이재훈,노용현,차용우,김성원 대한이비인후과학회 2011 대한이비인후과학회지 두경부외과학 Vol.54 No.1
Sialolithiasis is a major cause of salivary gland dysfunction. The majority of sialolithiasis or salivary stones are found in the submandibular glands or in its duct. As such, the sublingual gland is a very rare site for stone formation. We described a 30-year-old woman with multiple sialoliths in the sublingual gland. These sialoliths were removed by transoral sublingual sialadenectomy. A total of 11 calculi were found.
김안호(Ahn-Ho Kim),차용우(Yong-Woo Cha) 한국항만경제학회 2005 韓國港灣經濟學會誌 Vol.21 No.2
The trends of efficiency change for 10 years by using Malmquist model show that all periods except 1998/1999, 2001/2002, and 2002/2003 which were decreasing in efficiency exhibit an upward tendency in terms of averaged Malmquist index. The averaged Malmquist efficiency of the ports of Pyeongtaek, Daesan, and Sokcho has rapidly upwarded, and those of the ports of Wando, Samcheonpo, Tongyoung, Woolsan, Pohang, Samcheok, and Okgae were declined to the below 1.0 of efficiency scores. The averaged technical efficiency change has shown the upward trends except the periods of 1996/1997, 2000/2001, 2001/2002, and 2002/2003 which have been declined. However, overall efficiency was decreasing. The seaports which have improved their technical efficiency are the ports of Pyeongtaek, Daesan, and Sokcho, but those of Seoguipo, and Okpo have downed to the level of below 1.0.
Cartilage-Perichondrium Composite Island Graft를 이용한 제 1형 고실성형술 후 청력 결과
강대형,박효상,김승태,노용현,차용우,김주연,이환호 대한이비인후과학회 2010 대한이비인후과학회지 두경부외과학 Vol.53 No.11
Background and Objectives Many materials such as fascia, perichondrium and cartilage are used for reconstruction of the tympanic membrane in middle ear surgery. Because of its stiffness, cartilage is resistant to resorption and retraction. However, cartilage grafts result in increased acoustic impedance, so its use has caused controversies as to the acoustic transfer aspect. The aim of this study is to assess hearing results after cartilage tympanoplasty and after fascia tympanoplasty. Subjects and Method This study included 74 patients who had received tympanoplasty type I between 2007 and 2009, of whom 44 received cartilage and 30 fascia. The middle ear risk index was used to statistically compare the preoperative state of the two groups. Preoperative and six months- postoperative air-bone gaps at the frequency 0.5, 1, 2 and 3 kHz were assessed. Results Both groups were statistically similar with respect to the severity of middle ear pathology and the preoperative hearing levels. Overall postoperative hearing results showed air-bone gaps (ABG) ≤20 dB in 73% for the fascia group and 71% for the cartilage group. The mean postoperative gains in ABG were 8.97 dB for the fascia group and 10.84 dB for the cartilage group. There were no statistically significant differences in the postoperative frequency specific gains in ABG between the two groups. Conclusion These results demonstrate that hearing results after cartilage tympanoplasty are comparable to those after fascia tympanoplasty. Although cartilage is the ideal grafting material in problem cases, a more liberal application might be suggested in such cases as in tympanoplasty type I without fear of impairing hearing. Korean J Otorhinolaryngol-Head Neck Surg 2010;53:686-90
Patterns of Post-thyroidectomy Hemorrhage
이형신,김성원,최영식,박요한,이강대,이봉주,차용우 대한이비인후과학회 2009 Clinical and Experimental Otorhinolaryngology Vol.2 No.2
Objectives. Postoperative hemorrhage is a potentially life-threatening complication in thyroid surgery. This study was performed to review the clinical patterns of post-thyroidectomy hemorrhage, and especially as they are related to the source of bleeding. Methods. We performed a retrospective review of 10 patients (0.96%) with post-thyroidectomy hemorrhage that required surgical evacuation. The clinical patterns such as the time interval from surgery to hemorrhage and the signs and symptoms according to the bleeding focus were evaluated. Results. The mean time interval from surgery to symptom onset was 7 hr 52 min. Six cases showed bleeding deep to the strap muscles, while the other 4 cases showed bleeding superficial to the muscles. Ecchymosis was prominent and dark in color in 3 of the 4 cases (75%) of superficial bleeding, however it was identified in only 2 of the 6 cases (33%) of deep bleeding. Respiratory distress occurred in two cases of hematoma deep to the strap muscles, but in none of the cases with superficial bleeding. Conclusion. The post-thyroidectomy hemorrhage had some different clinical patterns between the superficial cases and the deep cases, showing that life-threatening airway obstruction occurred from the deep hematoma. A thorough understanding of the clinical patterns of post-thyroidectomy hemorrhage between the cases of superficial and those cases of deep hematoma may provide valuable surgical tips to manage this potentially lethal complication. Objectives. Postoperative hemorrhage is a potentially life-threatening complication in thyroid surgery. This study was performed to review the clinical patterns of post-thyroidectomy hemorrhage, and especially as they are related to the source of bleeding. Methods. We performed a retrospective review of 10 patients (0.96%) with post-thyroidectomy hemorrhage that required surgical evacuation. The clinical patterns such as the time interval from surgery to hemorrhage and the signs and symptoms according to the bleeding focus were evaluated. Results. The mean time interval from surgery to symptom onset was 7 hr 52 min. Six cases showed bleeding deep to the strap muscles, while the other 4 cases showed bleeding superficial to the muscles. Ecchymosis was prominent and dark in color in 3 of the 4 cases (75%) of superficial bleeding, however it was identified in only 2 of the 6 cases (33%) of deep bleeding. Respiratory distress occurred in two cases of hematoma deep to the strap muscles, but in none of the cases with superficial bleeding. Conclusion. The post-thyroidectomy hemorrhage had some different clinical patterns between the superficial cases and the deep cases, showing that life-threatening airway obstruction occurred from the deep hematoma. A thorough understanding of the clinical patterns of post-thyroidectomy hemorrhage between the cases of superficial and those cases of deep hematoma may provide valuable surgical tips to manage this potentially lethal complication.
정상 성대 기능을 가진 갑상선유두암종 환자에서 암 침윤이 있는 반회후두신경 보존의 기능적, 종양학적 결과
김영록 ( Young Rok Kim ),김주연 ( Joo Yeun Kim ),김성원 ( Sung Won Kim ),이봉주 ( Bong Ju Lee ),차용우 ( Yong Woo Cha ),이강대 ( Kang Dae Lee ) 대한갑상선학회 2008 International Journal of Thyroidology Vol.1 No.2
Background and Objectives: Complete excision with resection of the recurrent laryngeal nerve (RLN) in differentiated papillary thyroid carcinoma (PTC) with invasion of RLN, reportedly did not improve the survival over incomplete excision. However some investigators have provided definitive oncologic and functional outcomes concerning the preservation of recurrent laryngeal nerve involved in thyroid cancer. Materials and Methods: The RLN involved by locally invasive papillary thyroid carcinoma was preserved in 15 patients with functioning vocal cord, between April 1998 and April 2004. Retrospective study was performed with medical records of 11 patients who were followed-up more than 48 months. All patients were treated by the shaving technique for RLN preservation. Postoperative radioiodine and thyroid stimulating hormone suppression therapy were combined for ablation of microscopic residual PTC. Results: Postoperative survival rate of the patients with RLN preservation was 100%, and local recurrence was not observed. There were 13 nerves showing infiltration by PTC during the operation. Permanent vocal cord paralysis was not observed and transient vocal cord paralysis occurred in 1 nerve (7.7%) of 1 patient. Conclusion: Although the number of patients and follow-up duration of the study may be limited, preservation of RLN infiltrated by PTC maintained the functioning vocal cord without any clinical recurrence.