• Journal of Chest Surgery
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• v.24 no.2
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• pp.182-189
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• 1991

Fourteen patients underwent surgical resection of bullae between February, 1987 and June, 1990 via median sternotomy. Twelve patients had spontaneous pneumothorax with previous history of pneumothorax on the contralateral side or visible bullae on chest X-ray films. Two patients had bullous emphysema. The duration of operation and admission, frequency and amount of analgesic administered for pain control, pulmonary function test [FEV1, FVC, MVV] and the amount of bleedings were compared with six cases of staged unilateral thoracotomy. The results were as follows: 1. All patients were male. 2. Mean follow up period was 13.5 month and no recurrence of pneumothorax are noted after the operation. 3. Median sternotomy showed shortened admission days than thoracotomy. [12.4$\pm$2.7, 15.6$\pm$3.1 days] 4. Significantly shortened anesthetic time in median sternotomy than thoracotomy [121$\pm$21, 184$\pm$33 minutes] 5. Median sternotomy required less injection of analgesics than thoracotomy. [6.5$\pm$2.7, 13.5$\pm$3.1 ampules] 6. Bleeding amount and PFT showed no differences. 7. Complications were prolonged air leakage for more than 7 days [2 patients], transient elevation of SGOT and SGPT[2 patients], and wound infection[1 patient]

• Journal of Korean Neurosurgical Society
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• v.51 no.3
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• pp.155-159
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• 2012

The treatment of bilateral vertebral artery dissecting aneurysms (VADAs) presenting with subarachnoid hemorrhage (SAH) is still challenging. The authors report a rare case of bilateral VADA treated with coil trapping of ruptured VADA and covered stents implantation after multiple unsuccessful stent assisted coiling of the contralateral unruptured VADA. A 44-year-old woman was admitted to our hospital because of severe headache and sudden stuporous consciousness. Brain CT showed thick SAH and intraventricular hemorrhage. Cerebral angiography demonstrated bilateral VADA. Based on the SAH pattern and aneurysm configurations, the right VADA was considered ruptured. This was trapped with endovascular coils without difficulty. One month later, the contralateral unruptured VADA was protected using a stent-within-a-stent technique, but marked enlargement of the left VADA was detected by 8-months follow-up angiography. Subsequently two times coil packing for pseudosacs resulted in near complete occlusion of left VADA. However, it continued to grow. Covered stents graft below the posterior inferior cerebellar artery (PICA) origin and a coronary stent implantation across the origin of the PICA resulted in near complete obliteration of the VADA. Covered stent graft can be used as a last therapeutic option for the management of VADA, which requires absolute preservation of VA flow.

• Journal of Korean Orthopaedic Sports Medicine
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• v.9 no.1
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• pp.65-68
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• 2010

Operative treatment including a bone graft and an internal fixation was done in a fifteen-year old wrestler with transverse olecranon stress fracture. At 6 weeks after the operation, he could start active muscle strengthening exercise and returned to the previous level of exercise at 6 monthes after surgery. Conservative treatment including resting and muscle strengthening exercise was performed in an eighteen-year old baseball player with oblique olecranon stress fracture. At the follow-up of three months, he could start staged throwing exercise without pain or tenderness. He returned the previous level of throwing following strengthening exercise for 6 months.

• Journal of Power System Engineering
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• v.14 no.2
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• pp.28-33
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• 2010

In this research, cascade liquefaction process was simulated using two-staged direct expansion with inter-cooler. Evaporated gaseous refrigerant which has low pressure and temperature from the inter-cooler is mixed with gaseous refrigerant from outlet of 1st compressor, and flows into 2nd compressor. Therefore this prevents superheating compression. Compressor work of process which includes inter-cooler to all cycles shows the lowest value of 338.68 MW and it is lower 16.34% than that of basic process. Refrigeration capacity shows decreasing tendency as applied inter-cooler and that of process which includes inter-cooler to all cycles shows the lowest value of 449 MW. COP was increased when the inter-cooler was applied, and process which includes inter-cooler to all cycles shows highest value of 1.33. It shows that COP was increased because decrement of compressor work by applying inter-cooler was higher than decrement of refrigeration capacity.

• Journal of the Korean Society of Propulsion Engineers
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• v.15 no.2
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• pp.50-55
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• 2011

A preburner for the high performance, staged combustion cycle liquid rocket engine is being developed. For the structural design processes, strength experiments and finite element analyses on specimens simulating the brazing joints of the preburner, were performed and compared. Total two kinds of the specimen were manufactured for the tests. One simulated the joints between the oxygen injectors and the head junctioned by the conventional vacuum brazing. The another was made to test the brazing surfaces by vacuum compression between the combustion chamber cooling channel and the outer wall. During the burst experiments, it was observed that the fractures were occurred not at the brazed joining but in the middle of the face plate and the cooling wall. In addition, the analysis showed that the predicted fracture locations and the strains were well matched with the experiment results.

• Archives of Craniofacial Surgery
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• v.19 no.1
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• pp.79-82
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• 2018

Formation of an ideally-shaped tragus remains one of the most challenging issues during staged tragus reconstruction in microtia patients. The authors describe a new method used to treat a unique case of concha-type microtia in which the 10-year-old male patient had only a portion of pre-existing cartilage at the tragus site. An anomalous skin lump was also present. During the initial stages of the reconstruction, the two-stage Nagata method was used for surgical correction of the microtia. An autologous rib cartilage graft was used to form the ear framework. A temporoparietal fascia flap was also constructed. Remnant skin tags and anomalous cartilage that accompany microtia are usually removed during microtia repair. However, the cartilage and skin lump were preserved during the reconstruction. The skin lump was later used to form a vascularized chondrocutaneous island flap that supplemented the portion of cartilage during tragus formation. The result was a new tragus that was satisfactorily improved in both size and shape. Patients with concha-type microtia may benefit from the use of this new method for tragus formation.

• Asian Pacific Journal of Cancer Prevention
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• v.15 no.5
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• pp.2191-2194
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• 2014

Background: Fluorouracil-based regimens have been widely accepted and recommended in the guidelines for treating patients with early or advanced staged colon cancer, although results are controversial. Here we performed a systemic analysis to evaluate the impact of S-1 based regimens on response and survival of patients with colon cancer. Methods: Clinical studies evaluating the impact of S-1 based regimens on response and survival of patients with colon cancer were identified using a predefined search strategy. Summary response rates (RRs) to treatment were calculated. Results: Six clinical studies which including 227 patients with advanced colorectal cancer were considered eligible for inclusion. Two studies were conducted using combination of S-1 and Oxaliplatin, and four studies featured S-1 and irinotecan. Systemic analysis showed that, in all patients, pooled RRs was 43.17%. Major adverse effects were hematological toxicities, gastrointestinal disturbance, neurosensory toxicity. No treatment related death occurred. Conclusion: This systemic analysis suggests that S-1 based regimens, both with oxaliplatin or irinotean are associated with acceptable response and toxicity in patients with colon cancer.

• Journal of Chest Surgery
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• v.46 no.5
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• pp.365-368
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• 2013

We report a case of concurrent saccular aneurysms caused by a penetrating atherosclerotic ulcer of the thoracic and abdominal aorta that were successfully treated by staged endovascular repair. Even though surgical open repair or endovascular repair is the treatment option, use of endovascular repair is now accepted as an alternative treatment to surgery in selected patients. To prevent contrast medium-induced nephropathy and spinal cord ischemia caused by a simultaneous endovascular procedure, a saccular aneurysm of the descending thoracic aorta was excluded by stent graft, followed by the placement of a bifurcated stent graft in the infrarenal abdominal aorta one month later.

• Clinics in Shoulder and Elbow
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• v.20 no.1
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• pp.46-48
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• 2017

There are many methods of making cement spacer in patients who require a two-staged operation for humeral head osteomyelitis. However, limitation of motion after the first surgery-due to inadequate size and insufficient intra-articular space for second surgery-remain to be an issue. To mitigate this issue, we made a cement spacer with the same size and shape of the patient humeral head. Four patients with humeral head osteomyelitis were enrolled in this study. To make the cement spacer, we used the Mimics program, and designed the molding box by a reverse engineering technique. We evaluated the range of motion and pain using a Constant score. The mean abduction was $50^{\circ}$($40^{\circ}-60^{\circ}$), forward flexion was $50^{\circ}$ ($30^{\circ}-70^{\circ}$), and average Constant score was 47.75 (44-52). Three-dimensional printed molding technique is one of the effective methods for humeral head osteomyelitis allowing for daily activities prior to the second surgery.

• Maxillofacial Plastic and Reconstructive Surgery
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• v.14 no.3
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• pp.201-206
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• 1992

The eyelids perform many complex functions and are esthetically important, since eye is focal point of face. Tumor extirpation or trauma can lead to full-thickness eyelid defect, which Should be reconstructed as soon as possible There are a number of operation methods for lower lid reconstruction, and among them, Hughes procedure is a time-honored method. Its advantages are good cosmetic result and conjunctival repair by using eyelid structures to rebuild eyelid structures. However, this is a two-staged procedure in which the vision of the affected eye is obstructed during the interval between the operations. We experienced a case of trauma-induced full-thickness lower lid defect extending over one-third of lid length treated by Hughes method. The cosmetic and functional result was good and there was no donor site morbidity, and now we report this case with review of literatures.