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Watanabe Takuma,Yokoyama Atsushi,Shimizu Satoshi,Bessho Kazuhisa 대한구강악안면외과학회 2022 대한구강악안면외과학회지 Vol.48 No.4
A ranula is a pseudocyst that originates from the sublingual gland after trauma. Acute cases of ranulas that progress rapidly and cause respiratory dis-tress are rare. Holoprosencephaly is a complex brain malformation caused by incomplete cleavage of the prosencephalon. Children with holoprosen-cephaly may experience upper airway obstruction due to the associated dentoalveolar malformations and oromotor dysfunctions. We present the case of an eight-year-old female patient with holoprosencephaly and a plunging ranula that manifested as an acute course due to difficult airway management. She required gastrostomy for oromotor dysfunctions related to feeding and swallowing and difficulty managing oral secretions. The sublingual gland and ranula were removed under general anesthesia. Postoperatively, urgent reintubation and close monitoring in the intensive care unit were required due to upper airway obstruction. We successfully managed the patient with close cooperation of a pediatrician and an anesthetist, and no recurrence was observed at the one-year follow-up. A ranula can be caused by trauma to the floor of the mouth in association with lingually inclined mandibular teeth, a type of dentoalveolar compensation seen in maxillary hypoplasia associated with holoprosencephaly. Careful consideration is needed in such cases since airway management can be difficult due to postoperative swelling and oromotor dysfunctions.
Development of a Prototype Mobile Robot for Mallard Navigation
Takuma Watanabe,Hirokazu Madokoro,Satoshi Yamamoto,Hanwool Woo,Kazuhito Sato 제어로봇시스템학회 2019 제어로봇시스템학회 국제학술대회 논문집 Vol.2019 No.10
This paper presents a mobile robot prototype used for mallard navigation in a paddy field. One shortcoming of rice-duck farming is that a flock of mallards tends to gather in a specific area that produces a spring pond. This study was designed to develop a prototype of an autonomous mobile robot that guides a mallard flock to achieve highly efficient rice-duck farming. We developed a robot and waterproof boxes used for the protection of electric devices, including motors. The robot body is 270 mm long, 210 mm wide, and 250 mm high. Its body width is less than the length between rice stalks. After checking the waterproof capability for the body waterproof box, we conducted an indoor driving test for manual operation. Moreover, we conducted an outdoor evaluation tests to assess running on a gravel road and on a snowy road. We evaluated the robot performance not only for uneven surface roads including steps, but also for the range of wireless communication for controlling the robot.
( Teppei Komiya ),( Takuma Maeda ),( Yuki Kajino ),( Hirofumi Nakayama ),( Takayuki Shimaoka ),( Takayuki Hirao ),( Shuji Watanabe ),( Makoto Takemoto ),( Naoya Maeda ),( Akiyuki Ukai ),( Fumihiro Kas 한국폐기물자원순환학회(구 한국폐기물학회) 2019 한국폐기물자원순환학회 심포지움 Vol.2019 No.1
Approximately 20% of solid waste in Japan is disposed of at coastal landfill sites. It is an issue that it takes long-term to stabilize coastal landfill sites. Municipal solid waste incineration bottom ash (BA) is one of main wastes landfilled at coastal landfill sites. It is known that finer particles contain more contaminants in BA1), and it was demonstrated that the removal of finer particles from BA produced the lowering pH of leachate as well as the increase of permeability of the landfilled waste layer2). In this study, open channel (OC) classification was focused on as a feasible technique to remove finer particles from BA on a coastal landfill site, and its demonstrational experiment was carried out in order to clarify if the fine particle fraction (d<0.425mm) (FPF) could be removed from BA by OC classification and the settling characteristics of BA in OC. Fig. 1 shows the experimental apparatus. The sea water in a coastal landfill site was pumped up and flowed in OC, and BA is supplied on the surface of the flowing water. After completions of the settling and outflow of BA, saucers on the bottom of OC was collected, and the dry weight and particle size distribution of the BA sediment in each saucer were measured. Table 1 shows the experimental condition. The settling section means the part of OC from the BA supply point to the end of OC. Fig. 2 shows the removal ratio of FPF by OC classification, which is the ratio of the dry weight of FPF in the BA sediment to that in the BA supplied. The largest removal ratio was 61% in Case 3 with the largest water flow velocity and the shortest length of settling section. Fig. 3 shows the median of the settling velocity of BA in OC (MSV) compared with the theoretical settling velocity by Allen’s and Newton’s laws (TSV). The MSV of BA particles greater than 3mm was almost 50% of TSV, and MSV became closer to TSV as BA’s particle size became smaller. The MSV of BA particles with a diameter of 0.425mm was approximately 80% of TSV.
Ito Ken,Okano Naoki,Takuma Kensuke,Iwasaki Susumu,Watanabe Koji,Kimura Yusuke,Yamada Yuto,Yoshimoto Kensuke,Hara Seiichi,Kishimoto Yui,Matsuda Takahisa,Igarashi Yoshinori 거트앤리버 소화기연관학회협의회 2023 Gut and Liver Vol.17 No.4
Background/Aims: Many Japanese institutions use electromagnetic extracorporeal shock wave lithotripsy (ESWL) systems for treating pancreatic duct stones. However, there are no reports on direct comparisons between recent electromagnetic lithotripters. This study aimed to verify whether the new electromagnetic lithotripter can improve the efficiency of pancreatic stone fragmentation, and to clarify the role of combined endoscopic treatment on the clearance of pancreatic duct stones. Methods: We retrospectively identified 208 patients with pancreatolithiasis who underwent endoscopic adjunctive treatment after pancreatic ESWL at a single Japanese center over a 17-year period. We evaluated the outcome data of this procedure performed with SLX-F2 (last 2 years; group A) and Lithostar/Lithoskop (first 15 years; group B), as well as additional endoscopic treatments for pancreatolithiasis. We also performed logistic regression analysis to detect various factors associated with the procedure. Results: For pancreatic head stones, ESWL disintegration was achieved in 93.7% of group A patients and 69.0% of group B patients (p=0.004), and adjunctive endoscopic treatment removed stones in 96.8% of group A patients and 73.0% of group B patients (p=0.003). Multivariate analysis revealed that lithotripter type (odds ratio, 6.99; 95% confidence interval, 1.56 to 31.33; p<0.01) and main pancreatic duct stricture (odds ratio, 2.87; 95% confidence interval, 1.27 to 6.45; p<0.01) were significant factors for ESWL fragmentation. Conclusions: The SLX F2 showed high performance in fragmenting the pancreatic duct stones. In addition, endoscopic adjunctive treatment improved the overall success rate of the procedure. The improved ESWL lithotripter has many advantages for patients undergoing pancreatic lithotripsy treatment.
IMPACT OF RETAILERS’ GOAL-DIRECTED MOTIVATIONAL PROMOTIONS ON CUSTOMERS’ PARTICIPATION
Takashi Teramoto,Hiroyuki Tsurumi,Eiji Motohashi,Takashi Watanabe,Shin Sato,Takuma Kobayashi 글로벌지식마케팅경영학회 2023 Global Marketing Conference Vol.2023 No.07
Many retailers and food service providers offer programs as part of their loyalty programs in which customers are given stamps for each purchase of a qualifying product or service and redeemed for a reward once a certain number of stamps have been accumulated. We identify which stimuli in such goal-directed motivational promotions induce customers to participate in the program.
Yui Kishimoto,Naoki Okano,Ken Ito,Kensuke Takuma,Seiichi Hara,Susumu Iwasaki,Kensuke Yoshimoto,Yuto Yamada,Koji Watanabe,Yusuke Kimura,Hiroki Nakagawa,Yoshinori Igarashi 대한소화기내시경학회 2022 Clinical Endoscopy Vol.55 No.2
Background/Aims: Endoscopic evaluation of intraductal papillary mucinous neoplasms (IPMNs) is useful in determining whetherthe lesions are benign or malignant. This study aimed to examine the usefulness of peroral pancreatoscopy (POPS) in determiningthe prognosis of IPMNs. Methods: POPS with videoscopy was performed using the mother–baby scope technique. After surgery, computed tomography/magnetic resonance cholangiopancreatography or ultrasonography and blood tests were performed every 6 months during thefollow-up. Results: A total of 39 patients with main pancreatic duct (MPD)–type IPMNs underwent POPS using a videoscope, and theprotrusions in the MPD were observed in 36 patients. The sensitivity and specificity of cytology/biopsy performed at the time ofPOPS were 85% and 87.5%, respectively. Of 19 patients who underwent surgery, 18 (95%) patients had negative surgical margins and1 (5%) patient had a positive margin. Conclusions: In IPMNs with dilatation of the MPD, POPS is considered effective if the lesions can be directly observed. Thediagnosis of benign and malignant lesions is possible depending on the degree of lesion elevation. However, in some cases, slightlyelevated lesions may increase in size during the follow-up or multiple lesions may be simultaneously present; therefore, carefulfollow-up is necessary.
Naoki Okano,Yoshinori Igarashi,Ken Ito,Saori Mizutani,Hiroki Nakagawa,Kouji Watanabe,Yuuto Yamada,Kensuke Yoshimoto,Yuusuke Kimura,Susumu Iwasaki,Kensuke Takuma,Seiichi Hara,Yuui Kishimoto 대한소화기내시경학회 2021 Clinical Endoscopy Vol.54 No.5
Background/Aims: Bleeding is a complication of endoscopic snare papillectomy for ampullary tumors. This study aimed toinvestigate the clinical efficacy of hypertonic saline-epinephrine (HSE) local injection before endoscopic papillectomy for preventionof bleeding. Methods: We retrospectively reviewed the data of 107 consecutive patients with ampullary tumors who underwent endoscopicpapillectomy. The rates of en bloc resection, pathological resection margins, and prevention of immediate or delayed bleeding in thesimple snaring resection group (Group A) and the HSE injection group (Group B) were compared. Results: A total of 44 and 63 patients were enrolled in Groups A and B, respectively. The total complete resection rate was 89.7%(96/107); the clinical complete resection rates in Group A and Group B were 86.3% (38/44) and 92.1% (58/63), respectively (p=0.354). Post-papillectomy bleeding occurred in 22 patients. In Groups A and B, the immediate bleeding rates were 20.5% (9/44) and 4.8%(3/63), respectively (p=0.0255), while the delayed bleeding rates were 7% (3/44) and 11% (7/63), respectively (p=0.52). The rates ofpositive horizontal and vertical pathological margin in both groups were 27% and 16%, respectively. Conclusions: HSE local injection was effective in preventing immediate bleeding and was useful for safely performing endoscopicpapillectomy for ampullary tumors.
Usuda, Katsuo,Sagawa, Motoyasu,Maeda, Sumiko,Motono, Nozomu,Tanaka, Makoto,Machida, Yuichiro,Matoba, Takuma Matsui Munetaka,Watanabe, Naoto,Tonami, Hisao,Ueda, Yoshimichi,Uramoto, Hidetaka Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.6
Background: Precise staging of lung cancer is usually evaluated by PET-CT and brain MRI. Recently, however, whole-body diffusion-weighted magnetic resonance imaging (WB-DWI) has be applied. The aim of this study is to determine whether the diagnostic performance of lung cancer staging by WB-DWI is superior to that of PET-CT+brain MRI. Materials and Methods: PET-CT + brain MRI and WB-DWI were used for lung cancer staging before surgery with 59 adenocarcinomas, 16 squamous cell carcinomas and 6 other carcinomas. Results: PET-CT + brain MRI correctly identified the pathologic N staging in 67 patients (82.7%), with overstaging in 5 (6.2%) and understaging in 9 (11.1%), giving a staging accuracy of 0.827. WB-DWI correctly identified the pathologic N staging in 72 patients (88.9%), with overstaging in 1 (1.2%) and understaging in 8 patients (9.9%), giving a staging accuracy of 0.889. There were no significant differences in accuracies. PET-CT + brain MRI correctly identified the pathologic stages in 56 patients (69.1%), with overstaging in 7 (8.6%) and understaging in 18 (22.2%), giving a staging accuracy of 0.691. WB-DWI correctly identified the pathologic stages in 61 patients (75.3%), with overstaging in 4 (4.9%) and understagings in16(19.7%), giving a staging accuracy of 0.753. There were no significant difference in accuracies. Conclusions: Diagnostic efficacy of WB-DWI for lung cancer staging is equivalent to that of PET-CT + brain MRI.