著者

Jun Watanabe Yoko Iwamatsu-kobayashi Kenji Kikuchi Tomonari Kajita Hiromitsu Morishima Kensuke Yamauchi Wataru Yashiro Hidekazu Nishimura Hiroyasu Kanetaka Hiroshi Egusa

出版者

Japan Prosthodontic Society

雑誌

Journal of Prosthodontic Research (ISSN:18831958)

巻号頁・発行日

pp.JPR_D_23_00013, (Released:2023-02-22)

参考文献数

52

被引用文献数

3

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Purpose: The hazards of aerosols generated during dental treatments are poorly understood. This study aimed to establish visualization methods, discover conditions for droplets/aerosols generated in simulating dental treatments and identify the conditions for effective suction methods.Methods: The spreading area was evaluated via image analysis of the droplets/aerosols generated by a dental air turbine on a mannequin using a light emitting diode (LED) light source and high-speed camera. The effects of different bur types and treatment sites, reduction effect of intra-oral suction (IOS) and extra-oral suction (EOS) devices, and effect of EOS installation conditions were evaluated.Results: Regarding the bur types, a bud-shaped bur on the air turbine generated the most droplets/aerosols compared with round-shaped, round end-tapered, or needle-tapered burs. Regarding the treatment site, the area of droplets/aerosols produced by an air turbine from the palatal plane of the anterior maxillary teeth was significantly higher. The generated droplet/aerosol area was reduced by 92.1% by using IOS alone and 97.8% by combining IOS and EOS. EOS most effectively aspirated droplets/aerosols when placed close (10 cm) to the mouth in the vertical direction (0°).Conclusions: The droplets/aerosols generated by an air turbine could be visualized using an LED light and a high-speed camera in simulating dental treatments. The bur shape and position of the dental air turbine considerably influenced droplet/aerosol diffusion. The combined use of IOS and EOS at a proper position (close and perpendicular to the mouth) facilitated effective diffusion prevention to protect the dental-care environment.

著者

Hideaki ABE Manabu NATSUMEDA Yu KANEMARU Jun WATANABE Yoshihiro TSUKAMOTO Masayasu OKADA Junichi YOSHIMURA Makoto OISHI Yukihiko FUJII

出版者

The Japan Neurosurgical Society

雑誌

Neurologia medico-chirurgica (ISSN:04708105)

巻号頁・発行日

vol.58, no.7, pp.290-295, 2018 (Released:2018-07-15)

参考文献数

49

被引用文献数

8 26

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Histone H3 mutations are frequently found in diffuse midline gliomas (DMGs), which include diffuse intrinsic pontine gliomas and thalamic gliomas. These tumors have dismal prognoses. Recent evidence suggests that one reason for the poor prognoses is that O6-methylguanine-DNA methyltransferase (MGMT) promoter frequently lacks methylation in DMGs. This review compares the epigenetic changes brought about by histone mutations to those by isocitrate dehydrogenase-mutant gliomas, which frequently have methylated MGMT promoters and are known to be sensitive to temozolomide.

著者

Jun Watanabe Kazuhiko Kotani

出版者

THE JAPANESE ASSOCIATION OF RURAL MEDICINE

雑誌

Journal of Rural Medicine (ISSN:1880487X)

巻号頁・発行日

vol.18, no.1, pp.1-7, 2023 (Released:2023-01-06)

参考文献数

57

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Objective: Rural surgical training for residents is expected to increase the number of general surgeons working in rural areas; however, the impact of rural training programs to ensure such surgeons remains to be determined. Therefore, we reviewed the relevance of rural surgical rotation to the increase of general surgeons in rural areas.Materials and Methods: Studies on the outcomes of rural surgical rotations during the residency period in comparison to non-rural surgical rotations were retrieved using electronic databases through April 2022.Results: Among the 514 articles, five were eligible for review. All studies were published in the United States. Four studies reported an increased number of general surgeons in rural areas owing to rural surgical rotations. A meta-analysis of all studies showed a positive impact on the number of general surgeons in rural areas (odds ratio=2.19, 95% confidence interval=1.23–3.91). The programs generally ranged from 2 to 12 months with extensive experience with minor surgery and subspecialties necessary for surgery.Conclusions: Rural surgical rotations during the residency period can increase the number of general surgeons working in rural areas. Further studies are needed to evaluate the placement of general surgeons in rural areas.

著者

Bumpei Kikuchi Kazuhiro Ando Yoshihiro Mouri Toru Takino Jun Watanabe Tetsuro Tamura Shinya Yamashita

出版者

The Japanese Society for Neuroendovascular Therapy

雑誌

Journal of Neuroendovascular Therapy (ISSN:18824072)

巻号頁・発行日

pp.oa.2022-0047, (Released:2022-10-15)

参考文献数

30

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Objective: Time to recanalization is directly linked to cerebral infarction prognosis. However, patients transferred from another hospital take longer to arrive than those transported directly. To minimize time to recanalization, the emergency room (ER) skip strategy for hospital transfers was executed and reviewed.Methods: From April 2019, patients transferred from another hospital for mechanical thrombectomy were carried into the angio-suite using emergency service stretchers. Results for these patients (ER skip group) were compared with those for patients transported directly to our hospital (Direct group).Results: Among 108 cases in 32 months, 99 patients (91.7%) had major cerebral artery occlusion and underwent endovascular treatment. No differences in age, baseline National Institutes of Health Stroke Scale score, effective recanalization rate, or proportion of posterior circulation cases were seen between groups. The ER skip group (26 patients) showed significantly longer median time from onset to arrival (240 vs. 120 min; p = 0.0001) and significantly shorter median time from arrival to groin puncture (11 vs. 69 min; p = 0.0000). No significant differences were evident in time from groin puncture to recanalization (39 vs. 45 min), time from onset to recanalization (298 vs. 244 min), or rate of modified Rankin Scale score 0–2 after 90 days (42.3% vs. 32.9%). Median time from alarm to recanalization (266 vs. 176 min; p = 0.0001) was significantly longer in the ER skip group. Door-to-puncture (DTP) time for the Direct group gradually fell as the number of cases increased, reaching 40 min by the end of study period. In contrast, DTP time for the ER skip group remained extremely short and did not change further. The proportion of patients who underwent both CT and MRI before endovascular treatment was significantly lower in the Direct group (30.1%) than in the ER skip group (57.7%). In the ER skip group, median length of stay in the primary hospital was 119 min, and the median duration of interhospital transfer was 16 min.Conclusion: The ER skip strategy for patients transferred with large vessel occlusion achieved favorable outcomes comparable to that for direct transport cases. Direct transport to a thrombectomy-capable stroke center remains ideal, however, because the time to intervention is improving for direct transport cases each year.

著者

Sayaka TSUCHIDA Takanari HATTORI Akiko SAWADA Koretsugu OGATA Jun WATANABE Kazunari USHIDA

出版者

JAPANESE SOCIETY OF VETERINARY SCIENCE

雑誌

Journal of Veterinary Medical Science (ISSN:09167250)

巻号頁・発行日

pp.21-0076, (Released:2021-05-03)

被引用文献数

2

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We performed a comprehensive fecal metabolite analysis using LC-MS/MS and LC-QTOF-MS approaches as a preliminary study. Feces of Japanese macaques on Yakushima Island were collected from five monkeys at two separate locations. Using the former methodology, 59 substances such as free amino acids, nucleotides, nucleosides and nucleic acid bases, and organic acids in the citrate cycle were quantitatively detected and successfully differentiated in two different monkey groups by the concentrations of nucleic acid metabolites and free amino acids. In the latter, around 12,000 substances were detected both by positive and negative mode in each sample. Differences in signal intensities were observed between two monkey groups in the concentrations of plant secondary metabolites such as cyanogenic glycosides, flavonoids, and phenolics.