• Archives of Reconstructive Microsurgery
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• v.14 no.2
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• pp.125-130
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• 2005

The purpose of this study is to introduce a sensory restoration in reconstructed breast with free TRAM flap to evaluate recovery aspect and recovery quantity. 144 patients underwent breast reconstruction with free TRAM flap by authors and were followed up at the out patient clinique. We discovered that sensory of operated breast was recoverd. We divide the breast into 5 region (upper medial, lower medial, upper lateral, lower lateral, nipple areolar complex) for examining the sensory restoration. Sense of upper medial region & upper lateral region is recovered more quickly than other region. Touch sensation was recovered more quickly than pain sensation, temperature sensation, vibratory sensation. After about 1 year all protective sensation was recovered in all patient. We discovered that severe postop scar and irradiation of breast is related to delayed sensory recovery, age and size of flap is not related to sensory recovery.

• Archives of Craniofacial Surgery
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• v.20 no.4
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• pp.223-227
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• 2019

Background: Neurosensory changes are frequently observed in the patients with mid-face fractures, and these symptoms are often caused by infraorbital nerve (ION) damage. Although ION damage is a relatively common phenomenon, there are no established and objective methods to evaluate it. The aim of this study was to test whether trigeminal somatosensory evoked potential (TSEP) could be used as a prognostic predictor of ION damage and TSEP testing was an objective method to evaluate ION injury. Methods: In this prospective TSEP study, 48 patients with unilateral mid-face fracture (only unilateral blow out fracture and unilateral zygomaticomaxillary fracture were included) and potential ION damages were enrolled. Both sides of the face were examined with TSEP and the non-traumatized side of the face was used as control. We calculated the latency difference between the affected and the unaffected sides. Results: Twenty-four patients recovered within 3 months, and 21 patients took more than 3 months to recover. The average latency difference between the affected side and unaffected side was 1.4 and 4.1 ms for the group that recovered within 3 months and the group that recovered after 3 months, respectively. Conclusion: Patients who suffered ION damage showed prolonged latency when examined using the TSEP test. TSEP is an effective tool for evaluation of nerve injury and predicting the recovery of patients with ION damage.

• Resources Recycling
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• v.24 no.5
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• pp.22-32
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• 2015

This study aims to discuss the concept of upcycling as it applies to diaper recycling. Upcycling is the process of converting waste materials into new products of better quality. Through benchmarking of upcycling examples, useless objects can be transformed into valuable materials. However, current upcycling examples determine value creation related to qualitative elements, so that it is difficult to establish any quantitative strategy of upcycled products. Therefore, this study expands a B2B (Business to business) product for improving market availability and establishes a direction using both recovered pulp and mixed plastic at the same time. As a result, the upcycling method for recovered pulp and mixed plastics, is the application of a cellulose insulator. Within the near future, the high quality insulator market will grow more than three times. An upcycling strategy targeting the high quality insulator market needs to be established.

• Proceedings of the KSR Conference
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• 2008.11b
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• pp.406-415
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• 2008

Recently, the amount of thermosetting plastic wastes have increased with the production of reinforced plastic composites and causes serious environmental problems. The epoxy composites, one of the versatile thermosetting plastics with excellent properties, cannot be melted down and remolded as what is done in the thermoplastic industry. In this research, a series of experiments that recovers carbon fibers from carbon fiber reinforced epoxy composites for train body was performed. We experimentally examined various decomposition processes and compared their decomposition efficiencies and mechanical property of recovered carbon fibers. For the prevention of tangle of recovered carbon fibers, each composites specimen was fixed with a Teflon supporter and no mechanical mixing was applied. Decomposition products were analyzed by scanning electron microscope (SEM), gas chromatography mass spectrometer (GC-MS), and universal testing machine (UTM). Carbon fibers could be completely recovered from decomposition process using nitric acid aqueous solution, liquid-phase thermal cracking and pyrolysis. The tensile strength losses of the recovered carbon fibers were less than 4%.

• Archives of Craniofacial Surgery
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• v.25 no.4
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• pp.197-200
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• 2024

Ethmoid myoepithelial carcinoma is a rare tumor, with only 14 cases reported to date. This report discusses the largest tumor of this type ever recorded in the ethmoid region. The tumor caused extensive damage to facial structures, complicating treatment. The patient's age and comorbidities increased the risk of intraoperative bleeding, presenting challenges to the complete removal of the tumor and the reconstruction of the damaged structures. To reduce the risk of intraoperative hemorrhage, shorten the surgery time, and manage potential heart-related complications, arterial embolization was performed using gelatin sponges and coils. Definitive surgery was then carried out using a skin flap and mucosal flap to successfully reconstruct the defect. Postoperative radiotherapy was deemed unnecessary. The patient recovered well, with a satisfactory aesthetic outcome. No recurrence was observed during a 3-year follow-up period.

• Archives of Plastic Surgery
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• v.48 no.3
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• pp.329-332
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• 2021

Calcific myonecrosis is a rare condition in which hypoperfusion due to compartment syndrome causes soft tissue and muscle to become calcified. As calcific myonecrosis gradually deteriorates, secretions steadily accumulate inside the affected area, forming a cavity that is vulnerable to infection. Most such cases progress to chronic wounds that are unlikely to heal spontaneously. After removing the calcified tissue, the wound can be treated by primary closure, flap coverage, or a skin graft. In this case, a 72-year-old man had extensive calcific myonecrosis on his left lower leg, and experienced swelling and increasing tenderness. After removing the muscle calcification, we combined two anterolateral thigh free flaps, which were harvested from the patient's right and left thigh, respectively, to reconstruct the wound with a dead-space filler and skin-defect cover at the same time. The patient recovered without revision surgery or major complications.

• Resources Recycling
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• v.17 no.1
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• pp.43-50
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• 2008

In this study, we carried out the research on triboelectrostatic separation for materials separation of PET & Nylon recovered to waste plastic beer bottle. From the research on charging characteristic for choice of charging materials, it was found that PMMA was optimum charging material to make high charging amount with opposite polarity for PET & Nylon in waste plastic beer bottle. Therefore, we manufactured a charger of pipe line and cyclone type using PMMA material for separation of PET and Nylon. At optimum test conditions that used PMMA pipe line and cyclone charger developed in this study, we developed a triboelectrostatic separation technique that can separate PET plastic up to grade of 99.6% and recovery of 88.2%. We established new separation technology that can recycle the PET and Nylon recovered from waste plastic beer bottle.

• Journal of the Korean Society for Railway
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• v.12 no.6
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• pp.1059-1066
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• 2009

Recently, the amount of thermosetting plastic wastes has increased with the production of reinforced plastic composites and causes serious environmental problems. The epoxy resins, one of the versatile thermosetting plastics with excellent properties, cannot be melted down and remolded as what is done in the thermoplastic industry. In this research, a series of experiments that decompose epoxy resin and recover carbon fibers from carbon fiber reinforced epoxy composites applied to railway vehicles was performed. We experimentally examined various decomposition processes and compared their decomposition efficiencies and mechanical property of recovered carbon fibers. For the prevention of tangle of recovered carbon fibers, each composites specimen was fixed with a Teflon supporter and no mechanical mixing was applied. Decomposition products were analyzed by scanning electron microscope (SEM), gas chromatography mass spectrometer (GC-MS), and universal testing machine (UTM). Carbon fibers could be completely recovered from decomposition process using nitric acid aqueous solution, liquid-phase thermal cracking and pyrolysis. The tensile strength losses of the recovered carbon fibers were less than 4%.

• Archives of Plastic Surgery
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• v.33 no.4
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• pp.514-517
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• 2006

Purpose: To report a rare case of concealed penis that was aggravated by circumcision and simple way of treatment using skin flap. The concealed penis is a primarily pediatric disease and is usually treated by urologists. The plastic surgeons tend to see these patients when it become secondary deformation or in conjoinment with other specialties. In such situation, the plastic surgeons do not have many experiences. Methods: A 3-year-old boy was admitted with aggravated concealed penis after circumcision in congenital webbed penis. Patient had been operated with scar revision and skin flap and peri operative antibiotics. Results: The patient recovered well without any complication such as infection, hematoma and necrosis of flap. Patient was discharged POD#7 with remaining sutures. Patient was followed up for 7 months and he has no sign of erectile dysfunction, voiding dysfunction and evidence of inflammation of the urinary system. Conclusion: We experienced a case of concealed penis that was aggravated from aggressive circumcision in congenital webbed penis.

• Archives of Plastic Surgery
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• v.36 no.3
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• pp.348-350
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• 2009

Purpose: The objective of this study is to present a reliable method of scrotal reconstruction. Methods: 75 year - old - man visited the out patient department of urology for chronic itching sensation in his scrotal area, diagnosed as Bowen's disease. After the wide resection of scrotal lesion, reconstruction was carried with pedicled anterolateral thigh perforator flap. All operation procedure was done with an usual manner, previously reported. Donor site was closed primarily. Results: In 6th month follow - up period, there was no event, such as flap necrosis, wound dehiscence, tumor recurrence. And tactile sensation was recovered. Conclusion: In the Korean literature, there have not been the report that describes the reconstruction of scrotal defect using pedicled anterolateral thigh perforator flap. Pedicled anterolateral thigh perforator flap is reliable and robust flap for scrotal reconstruction.