• Journal of Chest Surgery
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• v.41 no.1
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• pp.128-132
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• 2008

Penetrating vascular trauma to zone one of the neck is potentially life-threatening. Trauma in this anatomical location is difficult to access and manage because the neck is a small anatomic area with the anatomical proximity of vital structures. An accurate diagnosis and aggressive surgical intervention are critical to the successful outcome of penetrating zone one vascular trauma in the neck. Here we report two cases with review of the medical literature.

• Journal of Chest Surgery
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• v.33 no.7
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• pp.581-584
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• 2000

Because the penetrating cervical tracheoesophageal injury may be associated with significant morbidity and mortality, it is important to choose the optimal method of diagnosis and management in patient with tracheoesophageal injury. We obtained a satisfactory result from repair of tracheoesophageal injuries using cardiopulmonary bypass. If the bleeding from the unidentified deep injury and the spread of infection could be controlled, the repair using CPB might increase the margin of safety during operation in the similar cases.

• Journal of Chest Surgery
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• v.30 no.10
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• pp.1005-1009
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• 1997

Diaphragm injuries are very important because, if both thoracic and abdominal viscera are damaged, a combination of shock and acute respiratory distress may develop. It can be highly lethal. This evaluation was based on the reviews of 17 cases of traumatic diaphragm injuries treated at the Department of Cardiovascular Surgery, Seoul Adventist Hospital during 5 years from March 1993 to February 1997. The mean age of the patients was 37.2 years and sex ratio was 3.2:1 with male dominance. Blunt trauma(N=5, Rt.=4, Lt.= 1) was 29.5%, penetrating trauma(N= 12, Rt.=5, Lt.=7) was 70.5%. Dyspnea(76%) was the most common symptom. Blunt trauma(9.8$\pm$3.7 Cm) was larger than the penetrating trauma(3.2$\pm$ 1.3 Cm)(P<0.05) in the size(mean$\pm$SD) of the injury. All of the patients had associated injuries and repaired immediatley with thoracic approach 11 cases(64%), abdominal approaih 3 cases(18%) and thoracoabdominal approach 3 cases(18%). f cases of penetrating diaphragmatic t auma was diagnosed on the operation of other organ injury Now we suggest that diaphragmatic injury should be suspected in all patients with penetrating as well as blunt injury of the chest and abdomen to protect the patient from its late complications.

• Journal of Chest Surgery
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• v.29 no.4
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• pp.433-439
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• 1996

From January 1980 to July 1995, 32 patients with blunt diaphragmatic trauma and 12 wish penetrating diaphragmatic trauma were treated at Kyungpook University Hospital. The mean age of patients with blunt trauma was 37.6 years, and with penetrating trauma 29.2 years. The mean age was older in patients with blunt trauma by 8.4 years (p< 0.05). When simple chest X-ray diagnosis was performed, 24cases (75%) of the diaphragmatic injuries were found in blunt trauma and 4 case(33%) in penetrating trauma. When opei.ations were done due to injuries of thoracic or abdominal organ, 7 diaphragmatic injuries (58%) were found in penetrating trauma. Herniation occurred in 24 patients (75%) in blunt trauma and 5 patients (42%) in penetrating truma. The size of injured diaphragms in 29 cases in which hernia was discovered was 10.9 $\pm$ 4.3cm. On the other hand, the size in 15 cases in which hernia did not occur was 3.5 $\pm$ 2.9cm. There was a remarkable difference in their size depending on the presence or absence of hernia (p< 0.051. That is, a close relation between the sire of injured diaphragms and hernia was shown. All diaphragmatic injuries were repaired primarily. In blunt trauma approach of repair were as follows : 20 (63%) thoracic, 9 abdominal, 2 thoracoabdominal, and 1 thoracic and in penetrating trauma 6 (50%) abdominal, 4 thoracic, and 2 thoracic and abdominal. The complication rate was 19% in blunt trauma and 25% in penetrating trauma. Two patients with blunt trauma died with a mortality rate of 6.3% . All patients with penetrating trauma recovered. This study suggests that diaphragmatic injury should be suspected in all patients w th blunt as well as penetrating injury of the chest and abdomen. The size of injured diaphragms was larger in blunt trauma than in penetrating trauma. For herniation, it appeared to be more common in blunt trauma. The morbidity and mortality were related primary to the severity of associated injuries.

• Journal of Chest Surgery
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• v.43 no.6
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• pp.808-811
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• 2010

Simultaneous occurrence of the trachea, esophagus, and spinal cord injuries due to stabbing is rare. The incidence is decreasing, but early diagnosis and surgical treatment is important because it can be life-threatening. We present one case of simultaneous trachea, esophagus, and spinal cord injury caused by self-stabbing complicated with paraplegia.

• Transactions of the Korean Society of Pressure Vessels and Piping
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• v.11 no.1
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• pp.61-68
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• 2015

The function of Feed Water Ring is to provide the flow path from Feedwater Nozzle to inside of SG(steam generator). Significant amounts of general FAC on the outside of the Feed Water Ring are not likely due to the low flow velocities in this area. However, on the interior of the Feed Water Ring, there may be areas of local higher flow velocity which could lead to higher FAC rates. These may include the inlet tee from the Feedwater Nozzle into the Feed Water Ring, the areas where the Feed Water Ring changes diameter, and especially the entrance area to the J-Nozzles. In this paper, the results of root cause analysis of through-wall hole observed at domestic WH 51F SG Feed Water Ring and its effect on the integrity and performance of SG are described. And, the maintenance strategy for WH 51F SG Feed Water Ring and the monitoring strategy for Downcomer Feed Water Ring of CE System 80 SG are presented.

• Journal of Industrial Convergence
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• v.21 no.2
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• pp.93-101
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• 2023

In this study, the physical and chemical fiber damage caused by knives, scissors, and chemicals was analyzed and used as technical data to determine the cause of the damage. Using 4 types of knives, 5 types of scissors and 4 types of chemicals(Sulfuric Acid, Hydrochloric Acid, Sodium Hydroxide, Potassium Hydroxide) physical and chemical to Cotton, Wool, Polyester, Rayon, T/C (Polyester 50%, Cotton 50%), T/W (Polyester 50%, Wool 50%) Damages were created and analyzed for damage caused by tools and chemicals. For penetrating damage caused by knives and scissors, 'V' type damage was generally seen when the blade part was penetrated, 'T', 'ㅁ', ''C' type damage was found, and in the case of scissors, 'Y' ' This type of damage was common. Fiber damage caused by chemicals showed various damage such as remanent trace, corrosion, degraded, contracting, and color changes. Physical damage of fibers showed differences in characteristics according to the shape characteristics of tools, and chemical damage showed differences in characteristics according to chemicals and types of fibers.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.39 no.3
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• pp.269-273
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• 2015

The study investigated the effect of the distance between two collinear circumferential surface cracks on the primary stress corrosion crack (PWSCC) growth in alloy 600TT steam generator tubes using a finite element damage analysis based on the PWSCC initiation model and macroscopic phenomenological damage mechanics approach. The damage analysis method was verified by comparing the results to the previous study results. The verified method was applied to collinear circumferential surface PWSCCs. As a result, it was found that the collinear cracks showed earlier coalescence and penetration times than the a single crack, and the times increased with the distance. In addition, it is expected that penetration may occur before coalescence of two cracks if they are more than a specific distance apart.

• Journal of Chest Surgery
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• v.30 no.5
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• pp.517-523
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• 1997

The records of 14 patients with traumatic diaphragmatic rupture seen at Dongguk University Hospital from February 1992 through December 1995 were reviewed. Ten patients were male and four were female(M:F=2.5:1). The age distribution ranged from 17 to 73 years with the mean age of 41.7 years. The 14 patients included 12 who had blunt trauma(traffic accident 11, crushing injury 1) and 2 with penetrating diaphragmatic rupture(stab wound 2). Of those 12 blunt trauma, 7 patients(58.3%) were left sided and 5(41.7%) involved the right hemidiaphragm. The diagnosis was made preoperatively in 8 patients (57.1%) and during surgery in 6(42.9%). All right-sided injuries were repaired through a thoracotomy and left-sided defects were corrected through a laparotomy in 6, laparotomy and thoracotomy in 1. There were 2(14.3%) operative deaths that were caused by myocardial infarction and the sequelae of combined injuries.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.31 no.4A
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• pp.311-321
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• 2011

To analysis the effect of reinforcement ratio and impact velocity on local damage, a series of impact analyses are performed to predict local effects. According to these results, the reinforcement ratio has no effect on the penetration depth and perforation thickness, but notable change to the scabbing area were observed. The higher the missile velocity becomes, the greater the degree of local damage to the reinforced concrete slabs is. Analysis results will be useful in the impact-resistance design of containment buildings and structures.