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414 results on '"Ibuki Y"'

24. Hemodynamic response to orthostatic stress immediately after dialysis session in chronic hemodialysis patients

Author

Toshiyuki Mochizuki, Yoshimi Matsuo, Mayumi Sasaki, Kenichi Morihisa, Sakuyoshi Tabata, Toyofumi Fukuda, and Ibuki Yajima

Subjects
Hemodialysis, Hypotension, Noninvasive continuous hemodynamic monitoring, Postural change, Diseases of the genitourinary system. Urology, RC870-923
Abstract

Abstract Orthostatic hypotension is a risk factor for falls among chronic hemodialysis (HD) patients. This study aimed to investigate the hemodynamic response to orthostatic stress immediately after an HD session. Twenty-one HD patients (mean age, 70.2 ± 8.1 years; HD duration, 7.5 ± 6.4 years) participated in this study. Each 5-min hemodynamic monitoring was performed in the supine, semi-recumbent, and sitting positions immediately after an HD session. Hemodynamic variables were measured using a noninvasive beat-to-beat monitoring device during the test. Patients were divided into an intradialytic hypotension (IDH) group and a non-IDH group according to the presence or absence of IDH on the day of the measurements, and intra- and intergroup comparisons were performed. In the IDH group, the nadir values of systolic blood pressure in the semi-recumbent and sitting positions were significantly lower than those in the supine position and the last systolic blood pressure in the semi-recumbent position. The nadir of stroke volume in the sitting position was significantly lower than that in the supine position. There were no statistically significant intergroup differences in the changes for any positions. These results suggest that patients with IDH require special attention when getting out of bed to prevent post-dialytic falls.

Published
2018
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26. Adrenomedullin, ANP and BNP during pregnancy

Author

Abe, K., primary, Minegishi, T., additional, Nakamura, M., additional, Andoh, A., additional, Kanuma, T., additional, Ibuki, Y., additional, Nishikime, T., additional, Kojima, M., additional, and Kangawa, K., additional

Published
1998
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35. Erratum

Author

Minegish, T., primary, Nakamura, K., additional, Takakura, Y., additional, Ibuki, Y., additional, and Igarashi, M., additional

Published
1994
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47. Signal Interference Analysis Model In Near-Field Coupling Communication

Author

Shin Hasegawa, Yuichi Kado, Ibuki Yokota, Masaki Ishida, Hitoshi Shimasaki, and Mitsuru Shinagawa

Subjects
near-field coupling communication, electrically isolated measurement, path/signal loss, interference problem, Telecommunication, TK5101-6720
Abstract

Near-field coupling communication (NFCC) is a technology that uses the surface of the human body as a transmission path. To suppress the radiation signal from the human body, NFCC devices use a carrier frequency of less than 10 MHz. Because the radiation signal has the potential to disturb the other NFCC links, the radiation signal from other devices needs to be suppressed to ensure stable NFCC links. This paper describes our investigation of the interfering mechanism in NFCC systems to put the systems into practical use, such as at a ticket gate in the train station. We measured interference signal losses depending on the distance between two phantoms, regarded as human bodies. Based on the experimental and simulated results, an equivalent circuit of the signal interference was proposed. From the interference analytical model, we identified the capacitance that caused the interference problem and found that weakening the effects of this capacitance was important to achieve a stable NFCC link.

Published
2016
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