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Yusuke Hiratsuka,Jun Hamano,Masanori Mori,Isseki Maeda,Tatsuya Morita,Sang-Yeon Suh 한국호스피스완화의료학회 2023 한국호스피스.완화의료학회지 Vol.26 No.1
This paper aimed to summarize the current situation of prognostication for patients with an expected survival of weeks or months, and to clarify future research priorities. Prognostic information is essential for patients, their families, and medical professionals to make endof- life decisions. The clinician’s prediction of survival is often used, but this may be inaccurate and optimistic. Many prognostic tools, such as the Palliative Performance Scale, Palliative Prognostic Index, Palliative Prognostic Score, and Prognosis in Palliative Care Study, have been developed and validated to reduce the inaccuracy of the clinician’s prediction of survival. To date, there is no consensus on the most appropriate method of comparing tools that use different formats to predict survival. Therefore, the feasibility of using prognostic scales in clinical practice and the information wanted by the end users can determine the appropriate prognostic tool to use. We propose four major themes for further prognostication research: (1) functional prognosis, (2) outcomes of prognostic communication, (3) artificial intelligence, and (4) education for clinicians.
Preliminary Study of Needle Tracking in a Microsurgical Robotic System for Automated Operations
Yusuke Kurose,Young Min Baek,Yuya Kamei,Shinichi Tanaka,Kanako Harada,Shigeo Sora,Akio Morita,Naohiko Sugita,Mamoru Mitsuishi 제어로봇시스템학회 2013 제어로봇시스템학회 국제학술대회 논문집 Vol.2013 No.10
Surgical needle tracking is an important element of high-level automated operations conducted by surgical robotic systems. However, conventional needle tracking algorithms lack robust performancewith different needle postures and are not applicable to the small needles used during microsurgery. This paper discusses a robust, efficient needle tracking algorithm, which is capable of estimating all of the positions and of the postures of a microsurgical needle. In the preoperative preparation stage, contour models of the microsurgical needle are generated using a 3-D CAD model and saved in a database. During the operation, the system extracts the contours of the microsurgical needle from the microscopic image using the edge and the color information. The system then calculates the likelihood of the contour models in the database bymatching the contours extracted fromthemicroscopic image. The experimental results indicated that our proposed method has high accuracy when tracking a microsurgical needle, and that it performed robustly with different needle postures.
Development of Knee Joint Robot for Students Becoming Therapist
Yoshifumi Morita,Yuki Kawai,Yusuke Hayashi,Tatsuya Hirano,Hiroyuki Ukai,Kouji Sanaka,Hironori Nakamuta,Keiko Takao 제어로봇시스템학회 2010 제어로봇시스템학회 국제학술대회 논문집 Vol.2010 No.10
The authors are developing a knee joint robot as an educational tool for students becoming physical therapist (PT) or occupational therapist (OT). The robot can simulate some problems of a knee joint, such as range of motion trouble, contracture, rigidity, spasticity and so on. The robot has a knee joint mechanism to realize not only flexion/extension movement but also inner/outer rotation movement, which is based on the idea of rolling, sliding and coming off movement. In addition the robot has the wire drive system to control the knee joint passive movement. In this paper we design optimal arrangement of four pulleys in the wire drive system by introducing performance indices. In addition we design control algorithms to imitate two kinds of knee joint troubles and verify the effectiveness by fundamental experiments.
Endocuff-Assisted versus Cap-Assisted Colonoscopy Performed by Trainees: A Retrospective Study
Yutaka Okagawa,Tetsuya Sumiyoshi,Yusuke Tomita,Shutaro Oiwa,Fumihiro Ogata,Takashi Jin,Masahiro Yoshida,Ryoji Fujii,Takeyoshi Minagawa,Kohtaro Morita,Hideyuki Ihara,Michiaki Hirayama,Hitoshi Kondo 대한소화기내시경학회 2020 Clinical Endoscopy Vol.53 No.3
Background/Aims: The adenoma detection rate (ADR) of screening colonoscopies performed by trainees is often lower than thatof colonoscopies performed by experts. The effcacy of cap-assisted colonoscopy (CAC) in adenoma detection is well documented,especially that of CACs performed by trainees. Endocuff, a new endoscopic cap, is reportedly useful for adenoma detection; however,no trials have compared the effcacy of Endocuff-assisted colonoscopy (EAC) and CAC conducted by trainees. Therefore, the presentstudy retrospectively compared the effcacy between EAC and CAC in trainees. Methods: This was a single-center, retrospective study involving 305 patients who underwent either EAC or CAC performed by threetrainees between January and December 2018. We evaluated the ADR, mean number of adenomas detected per patient (MAP), cecalintubation rate, cecal intubation time, and occurrence of complications between the EAC and CAC groups. Results: The ADR was significantly higher in the EAC group than in the CAC group (54.3% vs. 37.3%, p=0.019), as was the MAP (1.36vs. 0.74, p=0.003). No significant differences were found between the groups with respect to the cecal intubation rate or cecal intubationtime. No major complications occurred in either group. Conclusions: Our results suggest that EAC exhibits increased ADR and MAP compared to CAC when performed by trainees.
Fabrication of Functional Cell Sheets with Human Thyrocytes from Non-Tumorous Thyroid Tissue
Yu Huang,Kosho Yamanouchi,Yusuke Sakai,Sayaka Kuba,Chika Sakimura,Michi Morita,Kengo Kanetaka,Mitsuhisa Takatsuki,Susumu Eguchi 한국조직공학과 재생의학회 2019 조직공학과 재생의학 Vol.16 No.6
BACKGROUND: Engineered cell sheet transplantation has been considered an alternative physiological therapy for endocrine disorders. In this study, we attempted to fabricate functional human thyroid cell sheets using the engineering technology by culturing primary thyrocytes in free-feeder monolayers and assessed their proliferation and function in two different media. METHODS: The non-tumorous tissues (approximately 2 g) were dissected during surgery. Primary human thyroid cells were isolated by mechanical dispersion and treatment with isolation solution. The cells were cultured on tissue culture dishes or temperature-responsive culture dishes to induce the formation of detached cell sheets. RESULTS: Primary thyroid cells isolated from nine patients were positive for thyroid transcription factor 1, thyroglobulin (TG) and cytokeratin 7. Cell sheets with follicles were fabricated by cells incubated in both Dulbecco’s Modified Eagle Medium (DMEM) and hepatocyte-defined medium (HDM) culture medium. The diameter and thickness of sheets fabricated in HDM were larger and thicker than those fabricated from DMEM. Furthermore, the cells incubated in HDM secreted higher levels of fT3 and fT4 than those incubated in DMEM. The thyroid peroxidase and TG mRNA of cells maintained in HDM were higher than those in cells maintained in DMEM. CONCLUSION: HDM appears suitable as a culture medium for maintaining primary thyrocytes and fabricating functional cell sheets. These in vitro findings may contribute to the development of appropriate culture conditions for human thyrocytes as well as engineered functional cell sheets.
Synthesis of metallic copper nanoparticles and metal-metal bonding process using them
Kobayashi, Yoshio,Nakazawa, Hiroaki,Maeda, Takafumi,Yasuda, Yusuke,Morita, Toshiaki Techno-Press 2017 Advances in nano research Vol.5 No.4
Metallic copper nanoparticles were synthesised by reduction of copper ions in aqueous solution, and metal-metal bonding by using the nanoparticles was studied. A colloid solution of metallic copper nanoparticles was prepared by mixing an aqueous solution of $CuCl_2$ (0.01 M) and an aqueous solution of hydrazine (reductant) (0.2-1.0 M) in the presence of 0.0005 M of citric acid and 0.005 M of n-hexadecyltrimethylammonium bromide (stabilizers) at reduction temperature of $30-80^{\circ}C$. Copper-particle size varied (in the range of ca. 80-165 nm) with varying hydrazine concentration and reduction temperature. These dependences of particle size are explained by changes in number of metallic-copper-particle nuclei (determined by reduction rate) and changes in collision frequency of particles (based on movement of particles in accordance with temperature). The main component in the nanoparticles is metallic copper, and the metallic-copper particles are polycrystalline. Metallic-copper discs were successfully bonded by annealing at $400^{\circ}C$ and pressure of 1.2 MPa for 5 min in hydrogen gas with the help of the metalli-ccopper particles. Shear strength of the bonded copper discs was then measured. Dependences of shear strength on hydrazine concentration and reduction temperature were explained in terms of progress state of reduction, amount of impurity and particle size. Highest shear strength of 40.0 MPa was recorded for a colloid solution prepared at hydrazine concentration of 0.8 M and reduction temperature of $50^{\circ}C$.
Cultivable butyrate-producing bacteria of elderly Japanese diagnosed with Alzheimer’s disease
Thi Thuy Tien Nguyen,Yuta Fujimura,Iyo Mimura,Yusuke Fujii,Ngoc Luong Nguyen,Kensuke Arakawa,Hidetoshi Morita 한국미생물학회 2018 The journal of microbiology Vol.56 No.10
The group of butyrate-producing bacteria within the human gut microbiome may be associated with positive effects on memory improvement, according to previous studies on dementia- associated diseases. Here, fecal samples of four elderly Japanese diagnosed with Alzheimer’s disease (AD) were used to isolate butyrate-producing bacteria. 226 isolates were randomly picked, their 16S rRNA genes were sequenced, and assigned into sixty OTUs (operational taxonomic units) based on BLASTn results. Four isolates with less than 97% homology to known sequences were considered as unique OTUs of potentially butyrate-producing bacteria. In addition, 12 potential butyrate-producing isolates were selected from the remaining 56 OTUs based on scan-searching against the PubMed and the ScienceDirect databases. Those belonged to the phylum Bacteroidetes and to the clostridial clusters I, IV, XI, XV, XIVa within the phylum Firmicutes. 15 out of the 16 isolates were indeed able to produce butyrate in culture as determined by high-performance liquid chromatography with UV detection. Furthermore, encoding genes for butyrate formation in these bacteria were identified by sequencing of degenerately primed PCR products and included the genes for butyrate kinase (buk), butyryl-CoA: acetate CoAtransferase (but), CoA-transferase-related, and propionate CoA-transferase. The results showed that eight isolates possessed buk, while five isolates possessed but. The CoA-transfer- related gene was identified as butyryl-CoA:4-hydroxybutyrate CoA transferase (4-hbt) in four strains. No strains contained the propionate CoA-transferase gene. The biochemical and butyrate-producing pathways analyses of butyrate producers presented in this study may help to characterize the butyrate-producing bacterial community in the gut of AD patients.
Unilateral rostral mandibulectomy for gingival vascular hamartoma in two calves
Takeshi Tsuka,Yoshiharu Okamoto,Naoki Yamamoto,Keiji Hayashi,Takehito Morita,Yuji Sunden,Yusuke Murahata,Kazuo Azuma,Tomohiro Osaki,Norihiko Ito,Tomohiro Imagawa 대한수의학회 2018 Journal of Veterinary Science Vol.19 No.4
A 2-month-old female Holstein calf and a 5-month-old female Japanese black calf presented with gingival vascular hamartoma located in the interdental space between the second and third mandibular incisors in the right and left mandibles, respectively. On radiographic or computed tomographic images, osteolytic changes appeared within the mandibular bones adjacent to the masses. The masses were removed along with affected mandibular bone by using unilateral rostral mandibulectomy. After surgery, both cases exhibited a normal appetite and grew normally, with no cosmetic changes or recurrences. Unilateral rostral mandibulectomy can be applied for invasive gingival vascular hamartomas associated with osteolytic changes.