• Journal of Chest Surgery
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• v.30 no.9
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• pp.927-931
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• 1997

Tricuspid regurgitation due to rupture of a chorda is a rare disease in newborns. Recently, we experienced one day old male with tricuspid regurgitation due to rupture of a chorda of anterior papillary muscle, and who had suffered from severe hypoxemia, acidosis, cyanosis, and bradycardia. Preoperative diagnosis was pulmonary atresia with intact ventricular s ptum, massive tricuspid regurgitation, and patent ductus arteriosus by echocardiogram, which demonstrated no flow through the pulmonic valve. At operation, the pulmonic valve was intact and a chorda of anterior papillary muscle was ruptured. Tricuspid regurgitation was corrected successfully with reconstruction of the chords. Postoperative course was complicated by pneumonia and sepsis, but the infant recovered and discharged at postoperative 20 days.

• Journal of Chest Surgery
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• v.32 no.8
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• pp.749-752
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• 1999

Over the past several years, a number of centers have reported favorable results of anatomical repair for the congenitally corrected transpositions. However, there have been subsequent problems related mainly to the results of atrial switch procedures in patients who had small atriums because of venoatrial obstructions or supraventricular arrhythmias, especially in patients with apicocaval juxtaposition. Cavopulmonary shunt may be a useful addition to the double switch operation in certain circumstances as a means of avoiding potential atrial complications. Herein, we describe the successful anatomical repair of congenitally corrected transposition of the great artery with pulmonary atresia, ventricular septal defect, and cavo apical juxtaposition with this modification.

• Proceedings of the KAIS Fall Conference
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• 2010.11b
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• pp.755-758
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• 2010

본 연구의 목적은 지방 환자의 서울 지역 입원진료의 추이를 파악하고 그 요인을 규명하는 데 있다. 이를 위해 2005년 및 2008년 환자조사 입원자료를 이용하였으며, 서울지역 거주 환자를 제외하고 2005년 333,280명, 2008년 419,873명을 연구대상으로 하였다. 자료분석은 기술통계, 카이제곱 검정, 로지스틱 회귀분석을 실시하였다. 2005년 대비 2008년 성별, 연령별, 의료기관 유형 등 일반적 특성의 분포는 유사한 것으로 나타났다. 지방 환자의 서울지역 이용은 다소 증가한 것으로 나타났으며, 서울 지역 입원진료는 남자, 중장년층 건강보험환자가 타기관에서 의뢰되어 외래를 통해 입원하며, 주 거주지가 경기, 강원, 충북, 충남, 제주지역 순으로, 광역시는 상대적으로 낮았다. 질병군별로는 선천성 기형, 신생물, 종양이나 수술후 추후치료, 눈 질환, 혈액 조혈 면역기 질환, 근골격계 질환 순으로 지방환자의 서울지역 의료기관 입원 이용률이 높았다. 그러나 상대적으로 지방 입원진료 확률이 높은 노년층, 의료급여, 응급경유, 질병군별로 중증도가 높은 환자가 혼재되어 있어 있을 가능성이 있어 향후 중증도 보정에 대한 심층 연구가 필요한 것으로 판단된다.

• Clinical and Experimental Pediatrics
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• v.50 no.3
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• pp.302-305
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• 2007

As a result of the widespread use and enhanced quality of high-resolution radiological techniques, a recent report has revealed a relatively high prevalence of small adrenal tumors in patients with untreated congenital adrenal hyperplasia due to 21-hydroxylase deficiency. However, there are scarcely any pediatric cases of adrenocortical tumor following long-term treatment in patients suffering with congenital adrenal hyperplasia. We report here on a pediatric female case of adrenocortical adenoma despite adequate long-term treatment for the salt-losing type of congenital adrenal hyperplasia.

• Progress in Superconductivity
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• v.3 no.1
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• pp.28-30
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• 2001

We studied the flux-flow current-voltage characteristics of microwave-generated fluxons formed in serially stacked intrinsic Josephson junctions fabricated on$ HgI_2$-intercalated $Bi_2$$Sr_2$$CaCu_2$O/8+x/(Bi2212) single crystals. With increasing the irradiation power of 73$\square$76 GHz microwave, the supercurrent branch became resistive and split into multiple sub -branches. Each sub-branch represented a specific mode of collective motion of Josephson fluxons. We also observed similar branch splitting In a mesa prepared on an underdoped Bi2212 single crystal in a static magnetic field.

• Journal of Chest Surgery
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• v.32 no.1
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• pp.66-69
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• 1999

Bronchogenic cyst is an uncommon congenital lesion which is derived from the primitive foregut. Most bronchogenic cyst may develope at the tracheal bifurcation, both main bronchi, the lung parenchymeand the mediastinum. A 40-year old male was evaluated for dyspnea and chest tightness. Computed tomography revealed a well dermarcated, 7.2 ${\times}$ 7.9 cm sized, homogeneous mass compressing the left atrium. 2D-echo showed grade III mitral regurgitation. We completely removed the cystic mass and then confirmed the bronchogenic cyst in the pathological diagnosis. During the follow up period, the patient progressed well without any symptoms and showed grade I mitral regurgitation on the 2D-Echo. Therefore, we report a case of the bronchogenic cyst causing grade III mitral regurgitation.

• Annual Conference on Human and Language Technology
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• 2022.10a
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• pp.135-140
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• 2022

최근 Document Retrieval을 비롯한 대부분의 자연어처리 분야에서는 BERT와 같이 self-attention을 기반으로 한 사전훈련 모델을 활용하여 SOTA(state-of-the-art)를 이루고 있다. 그러나 self-attention 메커니즘은 입력 텍스트 길이의 제곱에 비례하여 계산 복잡도가 증가하기 때문에, 해당 모델들은 선천적으로 입력 텍스트의 길이가 제한되는 한계점을 지닌다. Document Retrieval 분야에서는, 문서를 특정 토큰 길이 단위의 문단으로 나누어 각 문단의 유사 점수 또는 표현 벡터를 추출한 후 집계함으로서 길이 제한 문제를 해결하는 방법론이 하나의 주류를 이루고 있다. 그러나 논문, 특허와 같이 섹션 형식(초록, 결론 등)을 갖는 문서의 경우, 섹션 유형에 따라 고유한 정보 특성을 지닌다. 따라서 문서를 단순히 특정 길이의 문단으로 나누어 학습하는 PARADE와 같은 기존 방법론은 각 섹션이 지닌 특성을 반영하지 못한다는 한계점을 지닌다. 본 논문에서는 섹션 유형에 대한 정보를 포함하는 문단 표현을 학습한 후, 트랜스포머 인코더를 사용하여 집계함으로서, 결과적으로 섹션의 특징과 상호 정보를 학습할 수 있도록 하는 SERADE 모델을 제안하고자 한다. 실험 결과, PARADE-Transformer 모델과 비교하여 평균 3.8%의 성능 향상을 기록하였다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2023.01a
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• pp.169-171
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• 2023

Wolff Parkinson White Syndrome(WPW)은 일반인과는 다르게 선천적으로 심방과 심실 사이에 부전도로(Accessory Pathway)가 존재하여 정상 전도와 비교하였을 때, 빠른 속도로 심실을 자극하여 부정맥을 일으키는 것을 의미한다. WPW는 부정맥이 주된 증상이기는 하나, 평소에는 무증상인 경우가 많고, 성인이 되어 갑작스럽게 발생하는 경우가 존재하기 때문에 인지하지 못하고 살아가는 환자들이 많다는 것이 특징이다. 이러한 특징은 갑작스러운 건강 악화가 타인의 생명에 악영향을 줄 수 있는 트럭 운전기사나 의사와 같은 직업군 등의 경우 WPW를 조기에 발견하고 치료해 위험을 사전에 방지하는 것이 매우 중요하다. 따라서, 본 논문에서는 Electrocardiogram(ECG) 데이터를 기반으로 WPW를 자동으로 분류하기 위한 Feature Ensemble 기반 심층 학습 프레임워크를 제안한다. 제안된 기법의 경우 단일 1D-CNN과 GRU를 이용한 기법 대비 F1-Score, Accuracy 기준의 성능 향상을 달성하였기에 본 Task에 적합함을 보여준다.

• Nuclear Medicine and Molecular Imaging
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• v.40 no.6
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• pp.316-321
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• 2006

Purpose: Differential diagnosis between arteriovenous (AVMs) aud non-arteriovenous malformations (nAVMs) is important in patients with congenital vascular malformations, because AVMs can cause hemodynamic alteration and require immediate treatment. We investigated whether transarterial lung perfusion scintigraphy (TLPS) was useful for the diagnosis and post-therapeutic evaluation of AVMs in extremities. Materials and Methods: Fifty-seven patients (M:F=26:31, $21{\pm}13$ yr, 9 upper and 48 lower extremities) suspected of congenital vascular malformations in extremities underwent TLPS using $^{99m}Tc-MAA$ before embolization/sclerotherapy. Dose-corrected shunt fraction (SF) was calculated from time-activity curve of the lung. Final diagnosis of AVMs was determined by angiography. in patients with AVMs, follow-up TLPS was done for post-therapeutic evaluation. Results: Sixteen patients (8 upper and 8 lower extremities) had AVMs, while the remaining 41 had nAVMs (1 upper and 40 lower extremities). The mean SF of AVMs on TLPS was significantly higher than that of nAVMs ($66.4{\pm}25.8%\;vs.\;2.8{\pm}4.3%$), p=0.003). The sensitivity, specificity, and accuracy of TLPS (cut-off of SF = 20.0%) in diagnosis of AVMs before treatment were 93.8% (15/16), 100% (41/41) and 98.2% (56/57), respectively. The follow-up TLPS and angiography for post-therapeutic evaluation showed concordant results in 13 of 16 patients (81.3%) with AVMs. The mean SF of TLPS was significantly decreased after embolization/sclerotherapy ($69.5{\pm}24.0%\;vs.\;41.0{\pm}34.7%$, p=0.01). Conclusion: TLPS provides hemodynamic information of AVMs in extremities semiquantitatively. Furthermore, the results of TLPS showed a high concordance rate with angiographic findings. Therefore, TLPS is useful for the diagnosis and post-therapeutic evaluation of AVMs in extremities.

• Journal of Korean Physical Therapy Science
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• v.3 no.1
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• pp.863-870
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• 1996

The 46 patients were investigated with the congenital infant muscular torticollis referred Dept. of physical therapy in Dong San Medical Center from January in 1995 to January in 1996. 1. The ratio between males and females was scaled to 1.5 : 1.23 cases(50.0 %) were involved with left side and 22 cases(47.8 %) involved with right side, and one case was of bilaterality. 2. Sequence of birth, the first bone babys were the most distributed with 34cases(73.9 %), the second bone babys were followed with 11cases(23.9 %). 3. There were normal deliveries 60.8 %, Cearean section deliveries 23.9 %, difficulty deliveries .0 % and breech presentation was 2.2 %. 4. The case of cephalic asymmetry consisted 60.0 % of all congenital torticollis and most frequently found at the age of all $5\sim8$ weeks(45.7 %). In 26.1 % of all congenital torticollis cases, facial asymmetry was found and these cases were most frequently in the age of $5\sim8$ weeks(26.1 %), also in the age group of $9\sim12$ weeks and $17\sim20$ weeks consecutively(each 3 %).(P<0.05) 5. The duration of therapy required differently according to the severity of the torticollis, in mild cases, it took $1\sim2$ weeks cases(30.4 %) revealed high therapeutic effect in 54.3 % of the cases. In moderately involved cases(30.4 %), therapy required $3\sim4$ weeks in 13 % of the cases showed improvements. In the most severely involved cases, (7 %) it took more than $9\sim10$ weeks of therapy and showed improvement in 6.5 % only.(P<0.005) 6. The result of this study showed the best therapeutic effects were noticed in the mild cases of congenital torticollis(24 cases 45.6 %) and excellent improvement in moderately involved cases (28.1 %) and 13.1 % of the most severely involved cases(P<0.05).