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Deep vein thrombosis and pulmonary embolism in the 8th week of pregnancy
하승형,최락경,장지원,임달수,황흥곤,노영무 대한심장학회 2007 Korean Circulation Journal Vol.37 No.3
A 29-year-old woman in her 8th week of pregnancy was referred to our hospital for swelling in the lower extremities,rapid onset of dyspnea (1 hr) and pre-syncope. Severe right ventricular dysfunction and moderate pulmonaryhypertension were detected using 2-dimentional Doppler echocardiography. In addition, left calf vein and proximalthromboses were detected by venous compression ultrasound imaging. After successful thrombolytic treatment, thepatient quickly recovered and was discharged from hospital on subcutaneous low-molecular-weight heparin. Shedelivered a normal, healthy infant at full-term (40 weeks). (Korean Circulation J 2007;37:130-133)
하승형,장영운,이상욱,장재영,동석호,김효종,김병호,장린 대한소화기내시경학회 2009 Clinical Endoscopy Vol.38 No.6
A primitive neuroectodermal tumor (PNET) belongs to the Ewing’s sarcoma family and is a malignant small round cell tumor of neural crest origin. The most common site of an extraosseous Ewing’s sarcoma is in the soft tissue of the body and extremities. A PNET in the ovary is uncommon. A PNET in the ovary is most often found with a metastasis and the prognosis is poor. The diagnosis of this tumor is confirmed following a pathohistological examination of tissue obtained after an open biopsy or surgery, but no case of a PNET has been diagnosed by the use of endoscopy in Korea. We present a case of a primitive neuroectodermal tumor of the ovary, which metastasized to the duodenum as diagnosed by use of an endoscopic biopsy in a 32-year-old woman who presented with abdominal discomfort. 원시신경외배엽종양은 유잉 종양군에 포함되는 신경능선 기원의 악성 소세포암이다. 뼈 이외의 유잉 육종이 흔히 발견되는 곳은 몸통과 사지의 연부조직이며, 난소에서 발생하는 경우는 흔하지 않다. 난소 원시신경외배엽종양은 진단 시 많은 경우에서 전이된 상태로 발견되며 예후는 좋지 않다. 종양의 진단은 대부분 개방 생검 또는 수술로 채취한 조직을 통한 병리조직학적 검사로 이루어진다. 그러나 아직까지 내시경검사로 조직을 얻어 진단된 국내보고는 없다. 저자들은 복부 불편감으로 내원한 32세 여자에서 십이지장으로 전이된 난소의 원시신경외배엽종양을 상부내시경을 이용한 조직검사로 진단하여 보고한다.
극 수와 슬롯 수 조합에 따른 집중권 방식 매입형 영구자석 동기전동기의 Normal Forces 및 설계 파라미터의 비교에 관한 연구
하승형(Seung-Hyonng Ha),권순오(Soon-O Kwon),반지형(Ji-Hyung Bahn),정재우(Jae-Woo Jung),홍정표(Jung-Pyo Hong) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
Interior Permanent Magnet Synchronous Motor(IPMSM) have many advantages such as high power density, wide speed range and so on. With the IPMSM, miniaturization and energy efficient design can be achieved in comparison with Surface Permanent Magnet Synchronous Motor(SPMSM). In order to secure miniaturization and manufacturing efficiency of the motor, it has concentrated winding, because concentrated winding can reduce the motor volume and make manufacturing to be simple compared with the distributed winding. However, according to the pole-slot combinations motor parameters can be changed and unexpected normal force can be generated. Especially, unbalanced normal force in airgap can cause serious vibration and acoustic problem. Accordingly, in this paper, normal force and parameters variation of concentrated winding IPMSM are investigated according to the pole-slot combinations.
단일풍선소장내시경으로 진단한 공장의 원발성 점액성 샘암종 1예
이영주,장재영,하승형,동석호,김효종,김병호,장영운,장린 대한소화기내시경학회 2010 Clinical Endoscopy Vol.40 No.3
The small bowel rarely develops neoplasm, and tumor of the small bowel accounts for only 1∼2% of all gastrointestinal neoplasm. Most cases of jejunal and ileal adenocarconoma are of the well or moderately differentiated type. Mucinous adenocarcinoma is diagnosed when the amount of extracellular mucin in a tumor is over 50% and its incidence in the small bowel is very low. A 49-year-old man presented with postprandial abdominal pain and vomiting for the previous 2 months. The abdominal computed tomography scan showed about a 6.5 cm-sized mass at the proximal jejunum. Single balloon enteroscopy was done preoperatively for making the diagnosis and the biopsy showed mucinous adenocarcinoma of the proximal jejunum. Under the diagnosis of primary jejunal cancer. We report here on our case for which a definite diagnosis was made before surgery by performing single balloon enteroscopy, and we review the relevant medical literature. 소장에서 발생하는 원발성 종양은 모든 위장관 종양의 1∼2% 내외이고 조직학적으로는 고분화샘암종이나 중등도분화샘암종이 가장 흔하다. 점액성 샘암종은 샘암종 형태이면서 종양 내부 세포외 점액량이 50% 이상일 때로 정의하며, 소장에서 발생한 원발성 점액성 샘암종의 보고는 국내외적으로 매우 드물다. 저자들은 소화 불량과 구역을 주소로 내원한 환자에서 단일풍선소장내시경 검사를 통하여 수술 전에 근위부 공장의 점액성 샘암종을 확진할 수 있었고 수술적으로 치료한 1예를 경험하여 문헌고찰과 함께 보고한다.