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( Daegeun Lee ),( Hojoong Kim ),( Byeong-ho Jeong ) 대한결핵 및 호흡기학회 2021 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.129 No.-
Background Tracheal stent is an alternative option for the treatment of benign acquired tracheal stenosis who are unable to perform surgery. Since long-term stent placement can increase the risk of stent related complications, an attempt is made to remove the stent after stabilization. However, little evidence has been established for factors associated with tracheal restenosis after stent removal. Therefore, this study aims to identify prognostic factors for tracheal restenosis in patients with post-intubation tracheal stenosis (PITS) and post-tracheostomy tracheal stenosis (PTTS). Methods We retrospectively reviewed medical records of PITS and PTTS patients from January 2004 to December 2019 in our medical center. Among the 269 stented patients, 130 patients who removed the stent were analyzed. Patients were divided into “success” or “failure” groups according to the treatment outcomes. Successful stent removal was defined as patients who did not need additional intervention after stent removal during follow-up period. A multiple logistic regression analysis was used to identify the factors associated with tracheal restenosis. Results Of 130 patients, 73 (56.2%) patients were stable and 57 (43.8%) patients had restenosis after stent removal. The trauma induced intubation was more frequent in the success group compared to the failure group (26.0% vs 10.5%, P = 0.026). The median length of stent was shorter in the success group (45 mm) than in the failure group (50 mm, P = 0.001). Multivariate analysis revealed that trauma induced intubation (aOR 0.329; 95% CI, 0.117-0.927; P = 0.036), and stent length less than 50mm (aOR 0.274; 95% CI 0.130-0.578; P = 0.001) are associated with a decreased risk of restenosis. Conclusions We demonstrated that trauma induced intubation and stent length were associated with successful stent removal.
S-324 Pleural recurrence after Transthoracic Lung Biopsy in Stage I Non-Small Cell Lung Cancer
( Daegeun Lee ),( Seong Mi Moon ),( Kyung Jong Lee ) 대한내과학회 2016 대한내과학회 추계학술발표논문집 Vol.2016 No.1
Background: Transthoracic needle biopsy (TTNB) is a useful modality for pathologic diagnosis of lung cancer. A risk of pleural dissemination after TTNB has been reported but remains a controversial issue. This study aimed to investigate whether the TTNB procedure increases the risk of pleural recurrence after curative resection and to identify the risk factors of pleural dissemination.?Methods: We retrospectively reviewed the clinical outcomes of p-stage I non-small cell lung cancer (NSCLC) patients who received curative lung resection for treatment between January 2009 and December 2010 at Samsung Medical Center. Patients who had double primary cancer and underwent limited resection due to poor lung function were excluded. Patients were divided into two groups, TTNB or non-TTNB, according to the procedure received before surgery. Kaplan-Meier analysis and log-rank test, and univariate and multivariate Cox regression analyses were used to determine the association between TTNB and pleural recurrence and identify the risk factors.?Results: Of the total 469 patients, 251 underwent TTNB before curative surgery, while the remaining 218 underwent bronchoscopic or open lung biopsy or had a clinical diagnosis. Of the 26 patients with ipsilateral pleural recurrence, 23 patients were in the TTNB group (23/251, 9.2%), whereas the remaining patient was in the non-TTNB group (3/218, 1.4%). Kaplan-Meier analysis showed that the TTNB group had lower pleural recurrence-free survival than the non-TTNB group(p<0.001). Multivariate Cox analysis revealed, TTNB (adjusted hazard ratio[HR], 5.102; 95% CI, 1.502 to 17.327; p=0.009), microscopic lymphatic invasion (adjusted HR, 2.765; 95% CI 1.226 to 6.232; p=0.014), and microscopic visceral pleural invasion (adjusted HR, 2.693; 95% CI 1.177 to 6.164; p=0.019) were risk factors for ipsilateral pleural recurrence.?Conclusions: The TTNB procedure was related to and increased the risk of ipsilateral pleural recurrence in stage I NSCLC after curative resection. Microscopic lymphatic invasion and visceral pleural invasion also increased the risk of ipsilateral pleural recurrence in this study.
Daegeun Lee,Sangjung Park,Yooshin Im J-INSTITUTE 2020 International Journal of Military Affairs Vol.5 No.2
Purpose: The study applied Delphi and AHP method to analyze the factors that can promote Non-commissioned officers(NCO)’ field leadership in about 30 experts. Method: First, we will look at ‘NCO Comprehensive Development 2.0’ in conjunction with Defense Reform 2.0. Afterward, the Delphi method is applied to a group of experts to promote the survey items that affect the field leadership of NCO as three major factors and nine lower fields. Finally, the deciding factors are prioritized using AHP techniques. According to ‘NCO Comprehensive Development 2.0’, the army plans to make active efforts to ensure that NCO in the fourth industrial revolution era will become expert warriors in individual and small unit combat, leaders that soldiers follow on their own and connectors with smooth communication, by 2025. The sur-vey of a group of experts applying the Delphi method conducted the first open questions and gradually induced the selective questions to reflect the expert’s feedback and finally completed the survey items. Results: The results of the AHP analysis and the Delphi method selected were found to have the highest identi-fication of improvement in the working environment and organizational culture, followed by the selection and training of NCO and enhancement of leadership capabilities. Conclusion: The study is meaningful in analyzing the factors that could facilitate NCO’s field leadership by uti-lizing Delphi and AHP methods.
( Daegeun Lee ),( Hye Yun Park ),( Byeong-ho Jeong ),( Kyungjong Lee ),( Hojoong Kim ),( O Jung Kwon ),( Jong Ho Cho ),( Sang-won Um ) 대한결핵 및 호흡기학회 2021 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.129 No.0
Background The role of 6 min-walk test (6MWT) and cardiopulmonary exercise test (CPET) for preoperative evaluation of non-small cell lung cancer (NSCLC) has not been well established in Asian population. This retrospective study investigated the correlation between the exercise tests and their effect on postoperative cardiopulmonary complications and treatment outcomes. Methods We included the subjects with stage I-II NSCLC who received lobectomy or greater extent surgery and underwent 6MWT and CPET simultaneously due to reduced pulmonary function, which was defined as predicted postoperative (ppo) FEV1 or ppoDLCO <60%. Study population was classified into four different groups according to the cut-values of the 6MWD and VO2max for risk stratification. Postoperative pulmonary complications (PPCs), postoperative cardiac complications (PCCs), and all-cause mortality were investigated. Results Between 2015 and 2020, a total of 191 subjects were enrolled. Median values of the 6MWD and VO2max were 462 m and 23.3 mL/kg/min, respectively and the 6WMD was well correlated with the VO2max (r=0.409, p<0.001). The cut-off values of 450 m for the 6MWD and 20 mL/kg/min for the VO2max were identified as optimal ones for risk stratification. The rates of PCCs and all-cause mortality were significantly different among the four groups (p=0.005 and p=0.001). However, no difference was found in PPCs among the four groups. On multivariate analysis, a greater exercise capacity (6MWD ≥450 m and VO2max ≥20 mL/kg/min) was significantly associated with a low rate of PCCs (adjusted OR, 0.40; 95% CI, 0.19-0.84; p=0.016), and a decreased all-cause mortality (aOR, 0.26; 95% CI, 0.08-0.79; p=0.017). Conclusions Exercise capacity was associated with PCCs and all-cause mortality in patients with NSCLC who underwent surgical resection. Indicators of 6MWT and CPET can help to select the optimal surgical candidates for NSCLC patients with reduced pulmonary function.
효율적인 자원관리를 위한 원격제어 시스템 및 그룹웨어 하이브리드 앱 제작
이대근 ( Daegeun Lee ),엄지용 ( Jiyong Eom ),이재우 ( Jaewoo Lee ) 한국정보처리학회 2017 한국정보처리학회 학술대회논문집 Vol.24 No.2
네트워크 통신을 이용한 원격 관리 응용프로그램, 스마트폰 애플리케이션, 웹 브라우저 기반의 그룹웨어 기능을 통해 실습실 자원을 효율적으로 관리하고자 한다. 소규모 그룹을 목적으로 개발하며 OSMD(One Source Multi DeviceO)를 통하여 실시간으로 접근이 가능하여 효율적으로 관리 할 수 있도록 한다.