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224 results on '"Ohe H"'

13. THE IMPACT OF DONOR SPECIFIC ANTIBODY ON LIVER ALLOGRAFT SURVIVAL AFTER LIVING DONOR LIVER TRANSPLANTATION

Author

Yoshizawa, A., primary, Egawa, H., additional, Ogura, Y., additional, Yurugi, K., additional, Hishida, R., additional, Ashihara, E., additional, Miyagawa-Hayashino, A., additional, Ohe, H., additional, Iida, T., additional, Hata, K., additional, Nizumoto, M., additional, Mori, A., additional, Kaido, T., additional, Maekawa, T., additional, and Uemoto, S., additional

Published
2010
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21. Carbon dioxide insufflation is useful for obtaining clear images of the bile duct during peroral cholangioscopy (with video)

Author

Ueki T, Mizuno M, Ota S, Ogawa T, Matsushita H, Uchida D, Numata N, Ueda A, Morimoto Y, Kominami Y, Nanba S, Kurome M, Ohe H, Nakagawa M, and Araki Y

Abstract

BACKGROUND: Peroral cholangioscopy (POCS) is useful for the diagnosis of various bile duct lesions. However, it is often difficult to obtain clear images because of bile or biliary sludge in the bile duct, even after vigorous irrigation of the bile duct with saline solution. Therefore, this study investigated whether inflation with carbon dioxide (CO(2)) yields clearer images of the bile duct than conventional saline solution irrigation during POCS. OBJECTIVE: To evaluate the clinical utility and safety of CO(2) insufflation into the bile duct to obtain clear images in POCS observations by comparing this method with conventional saline solution irrigation. SETTING: A single center. DESIGN: Case-control study. PATIENTS: Nineteen patients with suspected biliary diseases. INTERVENTIONS: CO(2) insufflation into the bile duct during POCS. MAIN OUTCOME MEASUREMENTS: The quality and safety of this method. RESULT: The quality of the images of the bile duct lumen with CO(2) insufflation (10 patients) was significantly superior to those with saline solution irrigation (9 patients) in both clarity (P < .05) and color (P < .05). In particular, extremely clear images could be obtained from the middle part of common bile duct to the right and left hepatic duct. No serious POCS-related complications occurred. There was no significant change in the venous partial pressure of the CO(2) level during the procedure. LIMITATIONS: The number of patients examined was small. CONCLUSIONS: CO(2) insufflation is useful for obtaining clear images of the bile duct during POCS, which makes it possible to determine the qualitative diagnosis and the extent of various bile duct lesions. [ABSTRACT FROM AUTHOR]

Published
2010
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27. InGaAlAs Multiple-Quantum-Well Optical Phase Modulators Based on Carrier Depletion.

Author

Ohe, H., Shimizu, H., and Nakano, Y.

Abstract

We fabricated carrier-depletion-type optical phase modulators which contain an InGaAlAs multiple-quantum well (MQW) in a p-n junction, and investigated their phase modulation characteristics at the wavelengths of 1.55-1.62 mum under reverse biased conditions. Fabricated devices showed large modulation efficiencies up to 89deg/mm/V and smaller wavelength-dependence than that of conventional MQW phase modulators. Carrier-depletion-type optical phase modulators are attractive for optical integrated devices such as optical matrix switches for future wavelength-division-multiplexing photonic networks. [ABSTRACT FROM PUBLISHER]

Published
2007
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