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RISS 인기검색어
- 검색키워드
- 저자 : Hokazono, Toshinori (검색결과 3 건)
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Catalytic Control Requirement for the Closed-Cycle High-Repetition-Rate Operation of a TEA CO₂Laser
Minoru Obara,Hirokazu hokazono,Naoki Kobayashi 慶熙大學校 레이저 工學硏究所 1991 레이저공학 Vol.2 No.-
Using the newly developed 1 kHz, closed-cycle transversely excited atmospheric (TEA) CO₂ laser with the efficient CO₂ regenerator including the Pt/Al₂O₃ solid catalyst, we experimentally determined the minimum operational performance of CO₂ regenerator, which is required for the stable and long-life operation of the closed-cycle TEA CO₂ laser. The operational performance of the CO₂ regenerator was evaluated by the fractional conversion (η) from CO to CO₂, which is defined as the ratio of the differential CO₂ concentration increased by the CO₂ regenerator to the total CO concentration introduced into the CO₂ regenerator. The minimum fractional conversion (Πmin) of 0.07 was at least required to keep the laser output power at 95% of the initial laser output for the laser gas mixture of CO₂/N₂/He=15/15/70(%) and at input energy density and a clearing ratio of 150 J/l and 6.0, respectively. When operating the CO?? regenerator at Πof 0.10, no appreciable reduction of the initial laser output of 570W due to CO₂ decomposition was observed up to 1.8 ×10?? shots (5 hours). At this time, the gas analysis showed that the CO and O₂ concentration in the laser gas mixture was maintained about at 0.17% and 0.055%, respectively.
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Eruption of a venous malformation through an iliac bone harvesting site after trauma
Tatsuki Kono,Atsuomi Saiga,Keiichi Tamagawa,Kensuke Katsuki,Misako Nomura,Toshinori Hokazono,Yuuki Uchida 대한성형외과학회 2018 Archives of Plastic Surgery Vol.45 No.6
Harvesting grafts from the anterior iliac bone has been associated with various complications. A 50-year-old woman presented to our department with a chief complaint of right inguinal swelling and pain. Autologous bone grafts had been harvested on two previous occasions from the right anterior iliac crest for use in the reconstruction of multiple facial fractures. Computed tomography and magnetic resonance imaging revealed a full-thickness bone defect in the right anterior iliac crest. A mass was noted in the right gluteus minimus, while a multilocular cystic mass extended from the right iliac crest defect to the right inguinal region. Both the inguinal mass and gluteal mass were removed under general anesthesia. Following histopathological analysis, the gluteal mass was diagnosed as a venous malformation (VM). Based on the patient’s clinical course, iliac bone graft harvesting and trauma to the gluteal region triggered hemorrhaging from the VM. Blood components leaked out from the fragile portion of the iliac bone defect, forming a cystic lesion that developed into the inguinal mass. In this case, a coincidental VM resulted in a rare complication of iliac bone graft harvesting. These sequelae could have been avoided by planning for more appropriate ways to collect the grafts.
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Eruption of a venous malformation through an iliac bone harvesting site after trauma
Kono, Tatsuki,Saiga, Atsuomi,Tamagawa, Keiichi,Katsuki, Kensuke,Nomura, Misako,Hokazono, Toshinori,Uchida, Yuuki Korean Society of Plastic and Reconstructive Surge 2018 Archives of Plastic Surgery Vol.45 No.6
Harvesting grafts from the anterior iliac bone has been associated with various complications. A 50-year-old woman presented to our department with a chief complaint of right inguinal swelling and pain. Autologous bone grafts had been harvested on two previous occasions from the right anterior iliac crest for use in the reconstruction of multiple facial fractures. Computed tomography and magnetic resonance imaging revealed a full-thickness bone defect in the right anterior iliac crest. A mass was noted in the right gluteus minimus, while a multilocular cystic mass extended from the right iliac crest defect to the right inguinal region. Both the inguinal mass and gluteal mass were removed under general anesthesia. Following histopathological analysis, the gluteal mass was diagnosed as a venous malformation (VM). Based on the patient's clinical course, iliac bone graft harvesting and trauma to the gluteal region triggered hemorrhaging from the VM. Blood components leaked out from the fragile portion of the iliac bone defect, forming a cystic lesion that developed into the inguinal mass. In this case, a coincidental VM resulted in a rare complication of iliac bone graft harvesting. These sequelae could have been avoided by planning for more appropriate ways to collect the grafts.
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