• Journal of Chest Surgery
• /
• v.22 no.4
• /
• pp.655-660
• /
• 1989

The unroofed coronary sinus syndrome is a spectrum of cardiac anomalies in which part or all the common wall between the coronary sinus and the left atrium is absent. This defect is part of a developmental complex which includes absence of the coronary sinus and termination of a persistent left superior vena cava in the left atrium. Recognition of this complex is important so that interruption or diversion of the left superior vena cava may be done to prevent subsequent central nervous system complications. Surgical correction uses an intraatrial baffle to divert flow from the left superior vena cava to right atrium and to close the atrial septal defect. This report describes a 7 years old female patient in whom the left superior vena cava was identified preoperatively and the complex [unroofed coronary sinus syndrome, common atrium, mitral valve cleft] recognized at the time of operation. Surgical correction, following repair of cleft mitral valve, utilized a Dacron patch baffle to route the left caval blood to the right atrium and included closure of the atrial septal defect

• Journal of Chest Surgery
• /
• v.21 no.5
• /
• pp.948-953
• /
• 1988

A technique applicated for physiologic correction of complex congenital cardiac disease suitable for Fontan procedure in which drainage of left superior vena cava and hepatocardiac vein to left atrium combined is described. We made one systemic venous baffle from left hepatocardiac vein to left superior vena cava and another systemic venous baffle from right inferior vena cava to the right superior vena cava with rigid prosthetic material[0.5mm thickness PTFE patch]. And then we anastomosed directly between the right sided atrial appendage and right pulmonary artery, and left-sided atrial wall beneath the appendage and left pulmonary artery. We believe that this procedure is superior to the method using intraatrial tube graft to divert the left hepatocardiac venous blood to right atrium, and applicable for physiologic correction of any complex congenital cardiac disease suitable for Fontan-type procedure in which anomalies of systemic venous drainage combined.

• Korean Journal of Bronchoesophagology
• /
• v.16 no.1
• /
• pp.64-67
• /
• 2010

Congenital esophageal stenosis due to tracheobronchial remnants is a rare anomaly, resulting in dysphagia and recurrent pneumonia, We have experienced three cases of csophageal stenosis due to ectopic tracheobronchial remnants and performed operative correction. Two patients were 20 months and five year old male with a chief complaints of swallowing difficulty from birth and the other was a twenty three year old female with a slowly increasing symptom of dysphagia for twenty years. Esophagogram of the patient with tracheobronchial remnants shows abrupt narrow segment at distal esophagus with marked proximal dilatation, and linear barium collections perpendicularly projecting from the stenotic esophagus. All of them were performed surgical correction by esophagectomy of the stenotic portion and esopahgo-gastrostomy with anti-reflux procedures, The resected specimens of these patients showed ectopic tracheobronchial chondroepithelial tissue within the esophageal wall histopathologically. Postoperative course was uneventful and have been in good condition without any problems.

• Journal of Chest Surgery
• /
• v.28 no.10
• /
• pp.932-934
• /
• 1995

Esophageal stenosis due to ectopic tracheobronchial remnants is an uncommon anomaly and only few cases were reported in the literature. We have experienced two case of esophageal stenosis due to ectopic tracheobronchial remnants and performed operative correction. The one patient was a five year old male with a chief complaint of swallowing difficulty from birth and the other was a twenty-three year old female with a slowly incresing symptom of dysphagia for twenty years. both of them were performed surgical correction by esophagectomy of the stenotic portion and esophago-gastrostomy with anti-reflux procedures. The resected specimens of the these two patients showed ectopic tracheobronchial chondroepithelial tissue withinthe esophageal wall histipathologically. Postoperative course was uneventful and have been in good condition without any problems.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
• /
• 2002.05a
• /
• pp.873-876
• /
• 2002

It has been reported that discrepancies exist in the case of double panels with an air layer when the measured sound transmission loss is compared with the calculated values. It has been known that the cause of this discrepancy is in major from the unavoidable dips associated with the double wall resonances. In this work, several correction methods to make up for such resonances are studied. In particular, the ‘boundary damping’concept is revisited and its effects are discussed by comparing with measured values. It is shown that the correction methods are necessary for the sound insulation analysis of double partitions with an air layer, in order to ascertain the quantitative correlation between measured and predicted values.

• Journal of Chest Surgery
• /
• v.14 no.2
• /
• pp.153-160
• /
• 1981

Within the group of congenital cardiac anomalies manifesting dextrocardia and double-outlet right ventricle, ventricular non-inversion [S.D.L] is extremely rare. Recently, a 5 year-old boy underwent a successful surgical correction of dextrocardia associated with double-outlet right ventricle, ventricular non-inversion [S.D], ventricular septal defect, pulmonary stenosis, and patent foramen ovale. The operation consisted of construction of an internal baffle connecting the left ventricle to the aorta through the large ventricular septal defect [subaortic]. The pulmonary stenosis was managed by infundibulectomy and patch enlargement of the right ventricular wall. The patient`s postoperative recovery has been uneventful, and 2 months after the operation, he is doing well.

• Journal of Chest Surgery
• /
• v.23 no.3
• /
• pp.609-615
• /
• 1990

Pectus excavatum is a congenital anomaly of the anterior chest wall with a sharp concave curvature of the body of the sternum, from above downward and from side to side, especially just before the junction of the glandioloxiphoid. There are two major operative procedures -"Ravitch" or "Wada" operation- for the correction of pectus excavatum. We used the modified Ravitch operation which consists of mobilization of the sternum, transverse osteotomy, and parasternal resection of the costal cartilages followed by placement of Marlex mesh using methyl methacrylate behind the sternum and suturing the edge of the Marlex mesh to the peripheral stump of the resected ribs. This was performed in a patient with severe pectus excavatum with good results at the Department of Thoracic and Cardiovascular Surgery Yonsei University College of Medicine in Seoul, Korea on January 12, 1989.anuary 12, 1989.

• Transactions of the Korean Society of Mechanical Engineers A
• /
• v.35 no.10
• /
• pp.1329-1335
• /
• 2011

On the basis of detailed 3D finite-element (FE) limit analyses, the plastic limit load solutions for pipes with slanted circumferential through-wall cracks (TWCs) subjected to axial tension, global bending, and internal pressure are reported. The FE model and analysis procedure employed in the present numerical study were validated by comparing the present FE results with existing solutions for plastic limit loads of pipes with idealized TWCs. For the quantification of the effect of slanted crack on plastic limit load, slant correction factors for calculating the plastic limit loads of pipes with slanted TWCs from pipes with idealized TWCs are newly proposed from extensive 3D FE calculations. These slant-correction factors are presented in tabulated form for practical ranges of geometry and for each set of loading conditions.

• Journal of the Korean Society for Nondestructive Testing
• /
• v.33 no.2
• /
• pp.138-146
• /
• 2013

The present paper provides the elastic stress intensity factors(SIFs) of thick-walled cylinder with non-idealized circumferential through-wall cracks. For estimating these elastic SIFs, the systematic three-dimensional(3D) elastic finite element(FE) analyses were performed. In order to consider practical shape of thick-walled cylinder and non-idealized circumferential through-wall crack, the values of thickness of cylinder, reference crack length and crack length ratio were systematically varied. As for loading conditions, axial tension, global bending and internal pressure were considered. In particular, in order to calculate the SIFs of thick-walled cylinder with non-idealized circumferential through-wall crack from those of thick-walled cylinder with idealized circumferential through-wall crack, the correction factor representing the effect of non-idealized crack on the SIFs were proposed in this paper. The present results can be applied to accurately evaluate the rupture probabilities of nuclear piping considering actual crack growth behaviors.

• Journal of Chest Surgery
• /
• v.27 no.3
• /
• pp.230-233
• /
• 1994

A 21-year-old man with atrioventricular[AV] reentry tachycardia secondary to concealed accessory AV connection underwent surgical division of two accessory pathways following failure of radiofrequency catheter ablation. pathways were located in the left free wall area.Before cardiopulmonary bypass, the epicardial mapping confirmed the existence and localization of two accessory pathways. The patient was approached through a left atriotomy with a dissection of the left free wall area beginning with an internal mapping was carried out after separation from cardiopulmonary bypass to confirm the absence of retrograde conduction of accessory pathway. Five weeks after surgery, the electrophysiololgic study demonstrated no retrograde conduction through two accessory pathways.