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중증 전자간증 임산부의 제대동맥 이완기말 혈류 속도에 따른 제대혈 혈액소견 및 주산기 예후
오준환 ( Joon Hwan Oh ),임윤경 ( Yun Kyoung Lim ),이희종 ( Hee Jong Lee ),김행수 ( Haeng Soo Kim ),양정인 ( Jeong In Yang ),유희석 ( Hee Sug Ryu ),오기석 ( Kie Suk Oh ) 대한산부인과학회 2003 Obstetrics & Gynecology Science Vol.46 No.4
Objective : To assess the umbilical nucleated red blood cell counts and perinatal outcomes according to umbilical artery Doppler end diastolic velocity in severe preeclampsia. Materials and Methods : A prospective case-control study comparing 42 severe pr
임산부 자궁경부 조직에서 cyclooxygenase-1 , -2의 발현 양상
오준환(Joon Hwan Oh),김행수(Haeng Soo Kim),양정인(Jung In Yang),김명신(Myung Sin Kim),양성천(Sung Chun Yang),한기수(Gee Soo Han),금승섭(Seung Sub Keum),오기석(Gee Suk Oh) 대한산부인과학회 2000 Obstetrics & Gynecology Science Vol.43 No.11
Objective : To determine whether cyclooxygenase (COX)-1 and COX-2 are expressed differentially during the whole gestational period in the pregnant human uterine cervix and if they are involved in the process of labor. Methods : Nine patients were matched for obstetrical history and maternal age were divided into an abortion group who aborted between 13 and 16 weeks(n=3), a preterm group who delivered between 20 and 37 weeks(n=3), and a term group who delivered between 37 and 42 weeks of gestation(n=3). Immediately after vaginal delivery cervical biopsy samples were obtained and immunohistochemically stained for COX-1 and COX-2 and the degree of staining was evaluated by H-scoring system. Results : Expression of COX-1 and COX-2 was found in epithelial and stromal cells of uterine cervical tissues of preterm and term group. The immunohistochemical expression of COX-1 and COX-2 was strongest in the term group compared to the preterm group in stromal cells(HSCORE : 2.0 vs. 4.0 ; 2.0 vs. 3.0), and in epithelial cells(HSCORE : 1.0 vs. 3.0 ; 1.0 vs. 3.0). Conclusion : Although small amount of the groups were investigated, in the pregnant human uterine cervix, COX-1 and COX-2 are found to be expressed, and both shows the strongest expression in term cervical tissue. It is suggested that the uterine cervix, under the control of prostaglandins, is actively involved in the process of labor, and it is thought that the role of COX-1 and COX-2 is more important in parturition process with advancing gestational age.
Technology Trade and Valuation Model of Technology Factor Method
오준환(Joon-Hwan Oh),Hyun-Woo Park 한국무역연구원 2017 무역연구 Vol.13 No.2
This study analyzes the applicability of a technology valuation model from methodological and practical perspectives on international technology trade. To accommodate high uncertainties in cross-border technology trades, international valuation practitioners prefer using the income approach which is based on the discounted future cash flows from the subject technology valued. This study analyzes the technology factor method (TFM) and suggests an improved valuation model relevant to international technology trade by presenting valuation results of a hypothetical case. TFM’s estimation process starts with the assessment of the risks (uncertainties) related to the successful application and commercialization of the subject technology. After determining an entity’s overall business value created by the subject technology, TFM multiplies this value by the technology’s contributory factor. In domestic technology transactions, TFM estimates the contributory proportion of technological asset to be from 1/4 to 1/3. In international technology trades, however, this study suggests that TFM take into consideration additional factors such as trade utility and trade tendency when estimating the contribution factor. This study’s case analysis confirms that the suggested method mitigates the traditional TFM’s prerequisites on efficiency, completeness, and comparability of international technology trading markets. The suggested TFM is expected to shed new light on international technology valuation, by promoting international technology trades.
태아의 이형성 신질환을 동반한 임신의 임상 양상 및 주산기 예후
오기석(Kie Suk Oh),김행수(Haeng Soo Kim),양정인(Jeong In Yang),오준환(Joon Hwan Oh),금승섭(Seung Seop Keum) 대한산부인과학회 2000 Obstetrics & Gynecology Science Vol.43 No.1
Objective: To obtain clinically useful data regarding prenatal diagnosis, proper antepartum counseling and obstetric management in pregnancies with fetal dysplastic kidney disease. Methods: We retrospectively reviewed 13 cases of MCDK(Multicystic dysplastic kidney) and PCDK(Polycystic dysplastic kidney), diagnosed by antenatal ultrasound and delivered from June 1994 through July 1999 at Ajou University School of Medicine, Department of Obstetrics and Gynecology, with regard to prenatal ultrasonographic findings, perinatal outcomes, maternal complications and associated fetal anomalies. Results: The incidence of MCDK and PCDK was one in 1,066 and one in 2,398 births, respectively. Of the 9 cases of MCDK, one case was terminated due to severely associated anomaly, and 6 cases were delivered by spontaneous labor or pitocin induction at term, of which 1 case was delivered by pitocin induction at 36 weeks gestation due to intrauterine fetal death. Two cases were delivered by cesarean section. There were no neonatal deaths in 7 cases of MCDK and they have been followed up to date, and alive. Of the 4 cases of PCDK, 3 cases were terminated by induced abortion or induced vaginal delivery, and 1 case was delivered by cesarean section, which was combined with hypertrophic cardiomyopathy, and the baby died within 24 hours after birth. Perinatal complications consisted of small for gestational age, urinary tract infection, hydronephrosis, acute respiratory failure, acute renal failure, periventricular hemorrhage and laryngomalacia in the neonatal period. Conclusion: It is suggested that antenatal ultrasonography and genetic analysis to evaluate accurate diagnosis and associated anomalies should be performed to manage and councel properly the pregnancies with fetal dysplastic kidney disease.
초기 상후두암종에서 레이저를 이용한 내시경하 상후두부분절제술의 적용
최종욱(Jong Ouck Choi),권기환(Kee Hwan Kwon),오준환(Joon Hwan Oh),한승훈(Seung Hoon Han),이승훈(Seung Hoon Lee),최건(Geon Choi) 대한두경부종양학회 1998 대한두경부 종양학회지 Vol.14 No.2
레이저를 이용한 내시경하 상후두부분절제술은 술전에 정확한 병기판정으로 초기 국소병변의 선택을 신중하게 하고 경부 림프절전이의 치료를 효율적으로 시행하는 경우 기존의 수술법과 유사한 생존율을 얻을 수 있었다. 환자의 상태에 따라서 충분한 수술시야를 확보하는데 어려움이 있으며, 병변의 위치에 따라서 술중 절제연의 확인이 힘들다는 제한점을 고려해야 하며, 술 후 발생할 수 있는 출혈, 부종, 오연 등의 합병증에 대비하기 위하여 술 전 기관절개술이 유용할 것으로 생각된다. Background: Supraglottis and glottis have a different embryologic origin. Supraglottic cancer is characterized by high incidence of cervical lymph node metastasis at initial diagnosis, and favored surgical management of the early supraglottic cancer was partial supraglottic laryngectomy, however the procedure resulted in frequent incidences of postsurgical aspiration and voice disabilities. Objectives: We retrospectively analyzed the problems and the advantages of the endoscopic laser assisted supraglottic partial laryngectomy as a part of surgical management for early supraglottic cancer. Materials and Methods: During the past nine years 25 cases of supraglottic cancer(Tl 10 cases, T2 15 cases) were treated by tracheotomy and laser assisted supraglottic partial laryngectomy(KTP532, 15 Watt, continuous type) and in 10 cases with cervical lymph node metastasis, they were additionally managed by neck dissection one week later, and all cases received postoperative irradiation therapy. Results: At present, 19 cases are alive with no evidence of disease. During the follow up period total of six cases(primary failure: three cases, nodal failure: three cases) were recurred. In relation to tumor staging, One of the 10 Tl cases and two of the 15 T2 cases recurred showing 88% locoregional recurrence rate for early supraglottic cancer. Postoperative com-plication included bleeding in three cases who were controlled by electrocautery under general anesthsia, one case of longstanding aspiration and two cases of laryngeal stenosis as a delayed complication. Conclusion: High control rate suggests that the endoscopic laser assisted supraglottic partial laryngectomy may be a good initial management method for early supraglottic cancer, however it is difficult to determine the resection margin, therefore, accurate tumor staging must be done prior to surgery. In order to prepare for postoperative bleeding, edema and aspiration, the tracheotomy must be performed prior to surgery.
최지향 ( Ji Hyang Choi ),서민정 ( Min Jung Suh ),이희중 ( Hee Joong Lee ),오준환 ( Joon Hwan Oh ),이귀세라 ( Gui Se Ra Lee ),허수영 ( Soo Young Hur ),신종철 ( Jong Chul Shin ),김사진 ( Sa Jin Kim ) 대한산부인과학회 2004 Obstetrics & Gynecology Science Vol.47 No.10
Objective : To study intrauterine or extrauterine misplacement of intrauterine devices in respect to their usage in diagnosis and therapy via retrospective analysis. Methods : Data from 1993 to 2000 on a total of 32 patients from seven Catholic University
이수선(Soo Sun Lee),강대호(Dae Ho Kang),최성권(Song Kwon Choi),최윤경(Yoon Kyung Choi),오준환(Joon Hwan Oh),신진웅(Jin Woong Shin),김도강(Do Gang Kim) 대한산부인과학회 2002 Obstetrics & Gynecology Science Vol.45 No.1
Gastrointestinal stromal tumor (GIST) of ileum is a rare tumor of gastrointestial tract that arise from primitive mesenchymal cells. GIST occur predominantly in persons over 40 years of age with an equal sex incidence. GIST expresses a heterogenous clinical course and the most important prognostic factors are tumor size, site, degree of mitotic activity, tumor necrosis. We report a case of GIST of ileum, which was misdiagnosed as extrauterine leiomyoma preoperatively.
박현희(Hyun Hee Park),양성천(Seong Cheon Yang),김행수(Haeng Soo Kim),양정인(Jeong In Yang),오준환(Joon Hwan Oh),강현웅(Hyun Woong Kang),김현주(Hyun Joo Kim),주연종(Yeon Jong Joo),오기석(Kie Suk Oh) 대한산부인과학회 1999 Obstetrics & Gynecology Science Vol.42 No.10
Objectives: The objective of this study is to analyze 1,068 cases of prenatal genetic amniocentesis and to compare the results with reported studies. Method: We analyzed 1,068 cases of midtrimester prenatal genetic amniocenteses from September 1994 to February 1999, and investigated the fetal chromosomal abnormality, obstetric outcomes and complications by the indications of genetic amniocentesis and prophylactic antibiotic use at the Department of Obstetrics and Gynecology, Ajou University School of Medicine. Results: Abnormal maternal serum markers were the most common indication of amniocentesis (57.7%) and the most common age distribution was 25-29 years (39.2%). One case of early amniocentesis (14 gestational weeks) was performed. The overall incidence of chromosomal aberration was 5.2% (56/1,068), of which there were 28 cases (50.0%; 28/56) of numerical aberrations and 28 cases (50.0%; 28/56) of structural aberrations. There were 50 cases (4.7%) of autosomal chromosomal aberrations and 6 cases (0.6%) of sex chromosomal aberrations. The pregnancy outcome was full-term delivery in 86.5%, preterm delivery in 7.6%, termination of pregnancy in 4.0%. There were no cases of serious complications including fetal death except for a case of self-limited amniotic fluid leakage(high leakage) in which the pregnancy was maintained. There were no significant differences between prophylactic antibiotics user group and non-user group in obstetric complications and outcomes. Conclusion: We could confirm that the trend in the indication of genetic amniocentesis had changed from advanced maternal age(35 year-old) toward abnormal maternal serum marker(triple test), and we recognized the importance of genetic amniocentesis according to the various antenatal screening tests of maternal serum marker, antenatal ultrasound, past history of fetal anomaly or family history of fetal chromosomal anomaly in the younger age groups(< 35 year-old) that are involved in more than half of the chromosomal anomaly. Further study will be needed to elucidate the efficacy of using prophylactic antibiotics in amniocentesis.
새로 발생한 13 q32.2 → qter 결손과 동반된 13 번 환상염색체 환아 1 예
황성진(Seong Jin Hwang),이지현(Jee Hyun Lee),박인양(In Yang Park),문희봉(Hee Bong Moon),오준환(Joon Hwan Oh),이귀세라(Gui Se Ra Lee),이종승(Chong Seung Yi),신종철(Jong Chul Shin),김수평(Soo Pyung Kim) 대한산부인과학회 2002 Obstetrics & Gynecology Science Vol.45 No.2
We report a case of ring chromosome 13 with a distal deletion of 13q32.2→qter observed in a fetus who was referred to our institution at term due to severe growth restriction and multiple congenital malformations on ultrasonographic examination. This boy was born by vaginal delivery at 39 weeks in gestation. His weight, head circumference and height were less than the 3 percentile of gestational age. Apgar score was 7 at 1 minute and 9 at 5 minutes. He showed microcephaly, large forehead, low set ears, hypertelorism, flat nasal bridge, and micrognathia. The genitalia was ambiguous, showing severe hypoplasia of the penis. The anus was ectopic, displaced anteriorly from its normal position but with a normal opening and function. Neurologic examination was normal. Echocardiogram done at 2 weeks of life showed a persistent foramen ovale and a ventriculoseptal defect (type II) with increased pulmonary hypertension. MRI examination of the brain showed poorly demarcating corpus callosum suspecting agenesis of corpus callosum. Also, cerebellar vermis was small and hypoplastic, mimicking a variant form of Dandy-Walker malformation. MRI of the pelvis showed a tubular structure in pelvic cavity, suspicious of uterine remnant, between urinary bladder and rectum, and a inguinal hernia was noted in the left side. In the abdominal cavity enlarged adrenal glands were noted, and hormonal study showed elevated 17-α-OH-progesterone (168.9 ng/ml) with normal 17-KS and 17-OHCS levels. Gastrointestinal and urogenital system were otherwise normal. Cytogenetic analysis of the parents were both normal but the newborn showed 46, XY, r(13), de novo, with deletion points q32.2→qter. Our findings are in line with previous reports about chromosome 13 deletions, in which loss of the critical point leads to major malformations like brain anomalies and ambiguous genitalia.