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Suzuki, Yushi,Tanaka, Ichiro,Sakai, Shigeki,Yamauchi, Tomohiro Korean Society of Plastic and Reconstructive Surge 2021 Archives of Plastic Surgery Vol.48 No.2
Background There are currently no guidelines for the postoperative wound management of the hard-palate donor site in cases involving mucosal harvesting. This study describes our experiences with the use of an artificial dermis for early epithelialization and transparent plate fixation in cases involving hard-palate mucosal harvesting. Methods A transparent palatal plate was custom-fabricated using a thermoplastic resin board. After mucosal harvesting, an alginic acid-containing wound dressing (Sorbsan) was applied to the donor site, which was then covered with the plate. After confirming hemostasis, the dressing was changed to artificial dermis a few days later, and the plate was fixed to the artificial dermis. The size of the mucosal defect ranged from 8×25 to 20×40 mm. Results Plate fixation was adequate, with no postoperative slippage or infection of the artificial dermis. There was no pain at the harvest site, but a slight sense of incongruity during eating was reported. Although the fabrication and application of the palatal plate required extra steps before and after harvesting, the combination of the artificial dermis and palatal plate was found to be very useful for protecting the mucosal harvest site, and resulted in decreased pain and earlier epithelialization. Conclusions The combination of artificial dermis and a transparent palatal plate for wound management at the hard-palate mucosal donor site resolved some of the limitations of conventional methods.
Voltage Regulator using Low Temperature Poly Silicon Technology for TFT-LCD Panel
Takahiko Mizuno,Masahiro Yoshida,Shigeki Imai,Yasoji Suzuki,Shinichi Murata 대한전자공학회 2009 ITC-CSCC :International Technical Conference on Ci Vol.2009 No.7
In this paper, a voltage regulator which can be integrated on a LCD panel using LTPS-TFT is proposed. The new voltage regulator can be reduced the deviation rate of the reference voltage (α') depending on the load fluctuation because the new voltage regulator provides a reference voltage shifter (RVS). By utilizing this circuit configulation, the proposed regulator can be obtained a stable constant output voltage. To confirm some performances of the proposed voltage regulator, the circuit analysis is carried out by using Smart-SPICE. As this results, the regulation rate of the output voltage (α) of the proposed voltage regulator is improved about 50% in comparison with that of conventional circuit under the conditions that the supply voltage (VDD) is +15V, the frequency (f) with the load current of+0.5㎃±0.5㎃ is 250㎑.
Yoshikazu Ishii,Yasoji Suzuki,Takafumi Satoh,Shigeki Imai 대한전자공학회 2008 ITC-CSCC :International Technical Conference on Ci Vol.2008 No.7
In this paper, a modified voltage reference circuitry using LTPS TFT is proposed. The new modified voltage reference circuitry is unaffected by fluctuations of the power supply voltage and the ambient temperature due to the utilization of enhancement-depletion (E-D) reference circuit and the operation in the weak inversion region for generation of a stable reference voltage. To verify the performance of the new modified circuitry, the circuit simulation is carried out by using SPICE. As a result of the simulation, the supply voltage dependability (SVD) and the temperature coefficient (TC) achieves to values of 0.08967 [%/V] and 0.00203[%/℃], respectively, when the ambient temperature (Ta) is +25℃ and the supply voltage (VDD) is +8V. In brief, these characterisitcs of the new modified circuitry are improved comparing with that of the conventional circuit.
( Hiroyasu Iwasaki ),( Takashi Mizushima ),( Yuta Suzuki ),( Shigeki Fukusada ),( Kenta Kachi ),( Takanori Ozeki ),( Kaiki Anbe ),( Hironobu Tsukamoto ),( Fumihiro Okumura ),( Takashi Joh ),( Hitoshi 대한소화기학회 2017 Gut and Liver Vol.11 No.1
Background/Aims: Self-expandable metallic stent (SEMS) placement is effective for dysphagia that results from malignant obstruction of the esophagus or gastric cardia; however, stent-related complications may be life-threatening. Thus, the goal of this study was to identify risk factors associated with complications following esophageal stenting. Methods: Of the 71 patients who underwent SEMS placement for dysphagia as a result of malignant stricture of the esophagus or gastric cardia, 53 patients with squamous cell carcinoma or adenocarcinoma, without previous SEMS placement, without a fistula, and without recurrent tumor after surgery were retrospectively identified. The occurrence of stent-related complications was used as an endpoint. Results: Stentrelated complications were identified in 26 patients (49.1%), and major complications occurred in 14 patients (26.4%). The use of an Ultraflex stent (odds ratio [OR], 6.81; 95% confidence interval [CI], 1.54 to 30.00; p=0.011) and prior chemotherapy (OR, 6.13; 95% CI, 1.46 to 25.70; p=0.013) were significantly associated with stent-related complications. Moreover, the use of an Ultraflex stent (OR, 19.60; 95% CI, 2.26 to 170.00; p=0.007) and prior radiation (OR, 25.70; 95% CI, 2.37 to 280.00; p=0.008) significantly increased the risk of major complications. Conclusions: The use of an Ultraflex stent and prior radiation and/or chemotherapy may represent risk factors for complications following esophageal SEMS placement. (Gut Liver 2017;11:47-54)
Cranioplasty with Custom-made Artificial Bone after Resection of Multilobular Bone Tumor in a Dog
최성진,Muneki Honnami,I-Li Liu,Kenichi Yamamoto,Shinsuke Ohba,Ryosuke Echigo,Shigeki Suzuki,Ryouhei Nishimura,Ung-il Chung,Nobuo Sasaki,Manabu Mochizuki 한국임상수의학회 2014 한국임상수의학회지 Vol.31 No.1
A 7-year-old spayed female Welsh corgi presented with a mass of the skull. The mass was diagnosed asmultilobular bone tumor and surgically removed. To treat a large bone defect after the tumor removal, custom-madeartificial bone fabricated by a 3-dimensional ink-jet printer was implanted in the defect. Follow-up computed tomographyevaluation was performed for 4.3 years. The implant was well integrated with the skull and had covered the largebone defect during the follow-up period. Gradual degradation of the implant began 6 weeks after surgery. It providesan additional option for the treatment of large bone defect.
Clinical associations of Trousseau's syndrome associated with cerebral infarction and ovarian cancer
Hirokuni Takano,Keiko Nakajima,Yoko Nagayoshi,Hiromi Komazaki,Jiro Suzuki,Hiroshi Tanabe,Shigeki Niimi,Seiji Isonishi,Aikou Okamoto 대한부인종양학회 2018 Journal of Gynecologic Oncology Vol.29 No.5
Objective: Since there have been few large series studies to date, we investigated the relationship between Trousseau's syndrome associated with cerebral infarction and its clinical associations with ovarian cancer. Methods: In this study, we investigated the association between cerebral infarction onset and ovarian cancer. Eight-hundred twenty-seven consecutive ovarian cancer patients from 4 affiliated academic institutions were included in the study over a 12 years period. All patients were histopathologically diagnosed as epithelial ovarian cancer and were analyzed retrospectively. Results: The 27 patients (3.2%) presented with cerebral infarction during the study period, 14 patients onset prior to treatment (1.7%), and 13 patients onset after start of initial treatment (1.5%). Univariate analysis and multivariate analysis was performed for onset of Trousseau's syndrome and various clinical and pathological parameters. There was no statistical significance between the occurrence of Trousseau's syndrome with age or International Federation of Gynecology and Obstetrics (FIGO) stage; however, univariate analysis and multivariate analysis demonstrated a statistically significant association between clear cell carcinoma (CCC) and non-CCC histology. Conclusion: Thus, our results demonstrate that Trousseau's syndrome with cerebral infarction occurred with greater incidence among CCC cases compared to non-CCC cases.
Choi, Sung-jin,Lee, Jong-il,Igawa, Kazuyo,Sugimori, Osamaru,Suzuki, Shigeki,Mochizuki, Manabu,Nishimura, Ryouhei,Chung, Ung-il,Sasaki, Nobuo Springer Verlag 2009 Journal of artificial organs Vol.12 No.4
<P>A new tailor-made bone implant (TI) with six horizontal cylindrical holes fabricated from alpha-tricalcium phosphate powder, as described in our previous report, was modified to include five additional vertical holes (TI-v) in an attempt to accelerate the bone regeneration through the holes. This TI-v implant and hydroxyapatite implants (HI) as controls were transplanted into experimental skull defects in dogs. Computed tomography (CT) was performed immediately after the surgery and then every 4 weeks. The dogs were killed for histological analysis at 24 weeks of implantation. On CT, bone bridging between the implant and the skull was observed in the TI-v group from 8 weeks of implantation, whereas a clear bone bridge was not formed in the HI group after 24 weeks of implantation. Histological analysis revealed collagen tissues and new bone formation in the horizontal cylindrical holes in most of the TI-v group, whereas mainly connective tissues invaded the porous structures in the HI group. In the Ti-v group, at the middle of the horizontal holes where they crossed the vertical holes, fibrous collagen tissues and muscular tissue filled up the hole and new bone formation seemed to be blocked. However, in the TI-v group more collagen and bone tissues were formed than in the HI group; when compared with the data in our previous report, however, the total volume of regenerated bone in the horizontal cylindrical holes in the TI-v seemed to be less than that in the TI. Thus, the addition of vertical cylindrical holes in the TI-v was not effective in promoting the faster stabilization of the TI-v in the skull of the dog.</P>
( Tadahisa Inoue ),( Fumihiro Okumura ),( Takashi Mizushima ),( Hirotada Nishie ),( Hiroyasu Iwasaki ),( Kaiki Anbe ),( Takanori Ozeki ),( Kenta Kachi ),( Shigeki Fukusada ),( Yuta Suzuki ),( Hitoshi 대한소화기기능성질환·운동학회 2016 Gut and Liver Vol.10 No.1
Background/Aims: A barbed puncture needle with a side hole was recently developed to improve sample quality and quantity in endoscopic ultrasound-guided fine-needle aspiration (EUS-FNA). In this study, we retrospectively assessed the usefulness of this puncture needle. Methods: Factors affecting diagnostic yield, safety, and diagnostic accuracy were investigated in 76 patients who consecutively underwent EUS-FNA for neoplastic lesions at our hospital between January and December 2013. Results: The procedure was successful in all cases; the rates of sample collection and determination of the correct diagnosis were 92.1% and 89.5%, respectively. The mean number of needle passes required for diagnosis was 1.1. Complications included mild intraluminal bleeding in two patients (2.6%). Multivariate analysis revealed that lesion size (≤20 mm) was significantly associated with a decreased chance of determining the correct diagnosis. Conclusions: Core biopsy needles with a side hole are safe and provide a satisfactory diagnostic yield. However, the side hole may potentially reduce the rate of making the correct diagnosis in small lesions. (Gut Liver 2016;10:51-57)