Details of a Researcher

2025.04

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Now

Akita University Faculty of Informatics and Data Science Department of Informatics and Data Science Lecturer
2017.04

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2025.03

Akita University Graduate School of Engineering Science Department of Systems Design Engineering Mechanical Engineering Course Lecturer
2013.07

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2017.03

Akita University Abolished organization Department of Mechanical Engineering Lecturer

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Research Areas 【 display / non-display 】

Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Control and system engineering

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Research Achievements 【 display / non-display 】

◆Original paper【 display / non-display 】

Preliminary Evaluation of the Response Performance and Analysis Method of a Small Intestine Motility Measurement System Using an Ileus Tube

Hosokawa Shinji, Naganawa Akihiro, Seki Takeshi, Oka Kiyoshi, Manabe Noriaki, Haruma Ken

The Japanese Journal of the Institute of Industrial Applications Engineers ( The Institute of Industrial Applications Engineers ) 13 ( 2 ) 110 - 121 2025 [Refereed]

Research paper (journal) Domestic Co-author

No functional testing methods to observe the recovery process of patients undergoing treatment with an ileus tube have yet been proposed. In this study, we developed a system that measures small intestine motility as changes in balloon pressure attached to an ileus tube during treatment, using a pressure sensor. As a preliminary technical evaluation of the system, we conducted measurements on five healthy volunteers: three received metoclopramide to promote motility, and two received butylscopolamine bromide to suppress it. We assessed whether the system, along with its signal analysis methods—specifically, time-domain and time–frequency analysis using wavelet transform—could quantitatively detect drug induced changes in motility. After metoclopramide administration, pressure fluctuations increased by approximately 0.2–0.4 kPa in the 1–2 cycles/min range, along with increased spectral power and activity. Conversely, approximately 27 seconds after butylscopolamine bromide administration, a pressure drop of 0.5–1.0 kPa and decreased activity in the 1–2 and 6–11 cycles/min ranges were observed. These results suggest that the system, combined with appropriate signal analysis methods, is technically capable of quantifying motility changes and may serve as a useful tool for clinical monitoring.

DOI CiNii Research

A preclinical research platform to evaluate photosensitizers for transbronchial localization and phototherapy of lung cancer using an orthotopic mouse model

Ishiwata T, Seki T, Gregor A, Aragaki M, Motooka Y, Kinoshita T, Inage T, Bernards N, Ujiie H, Chen Z, Effat A, Chen J, Zheng G, Tatsumi K, Yasufuku K.

Translational Lung Cancer Research ( Translational Lung Cancer Research ) 10 ( 1 ) 243 - 251 2021.01 [Refereed]

Research paper (journal) International Co-author

DOI

Development of a laser processing head for the inspection and repair of damages inside of a half-inch pipe

Komatsu Kazumi, Seki Takeshi, Naganawa Akihiro, Oka Kiyoshi, Nishimura Akihiko

Maintenology ( Japan Society of Maintenology ) 16 ( 3 ) 89 - 95 2017 [Refereed]

Research paper (journal) Domestic Co-author

DOI

Design and Preclinical Validation of the Composite-Type Optical Fiberscope for Minimally Invasive Procedures of Intrauterine Disease

Hiroshi Shigetomi, Kiyoshi Oka, Takeshi Seki, Hiroshi Kobayashi

Journal of Minimally invasive Gynecology 22 ( 6 ) 985 - 991 2015.10 [Refereed]

Research paper (journal) Domestic Co-author