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4 results on '"Yasuto Hamada"'

1. Message from the 2018 ITE Awards Winners and New Fellow Members

Author

Yasuto Hamada, Shoji Tanaka, Makoto Itami, Kazuo Ohzeki, Hiroshi Ohtake, Shigeyuki Sakazawa, Yoshiaki Shishikui, Shiro Suyama, Tokiichiro Takahashi, Hideya Takahashi, and Miki Haseyama

Subjects
Media Technology, Electrical and Electronic Engineering, Computer Science Applications
Published
2019

2. Pre-hospital portable monitoring of cerebral regional oxygen saturation (rSO2) in seven patients with out-of-hospital cardiac arrest

Author

Sumito Hayashida, Akinori Wakai, Yasuto Hamada, Kentaro Shimizu, Kazuya Katsura, Keiichi Sato, Tadahiko Shiozaki, Daikai Sadamitsu, Takeshi Shimazu, Mitsuo Ohnishi, Junji Nomura, Tomoya Hirose, and Naoki Ehara

Subjects
Adult, Male, medicine.medical_specialty, Resuscitation, Treatment outcome, 030204 cardiovascular system & hematology, General Biochemistry, Genetics and Molecular Biology, Out of hospital cardiac arrest, 03 medical and health sciences, 0302 clinical medicine, Regional oxygen saturation, medicine, Pre-hospital, Humans, skin and connective tissue diseases, Intensive care medicine, Aged, Monitoring, Physiologic, Medicine(all), Aged, 80 and over, Out-of-hospital cardiac arrest, Biochemistry, Genetics and Molecular Biology(all), Portable rSO2 monitor, business.industry, Brain, 030208 emergency & critical care medicine, General Medicine, Middle Aged, Emergency life-saving technician, Hospitalization, Oxygen, Emergency Medical Technicians, Treatment Outcome, Emergency medicine, Female, sense organs, business, Research Article
Abstract

Background In recent years, measurement of cerebral regional oxygen saturation (rSO2) has attracted attention during resuscitation. However, serial changes of cerebral rSO2 in pre-hospital settings are unclear. The objective of this study was to clarify serial changes in cerebral rSO2 of patients with out-of-hospital cardiac arrest (OHCA) in the pre-hospital setting. Methods We recently developed a portable rSO2 monitor that is small (170 × 100 × 50 mm in size and 600 g in weight) enough to carry in pre-hospital settings. The sensor is attached to the patient’s forehead by the ELT (Emergency Life-saving Technician), and it monitors rSO2 continuously. Results From June 2013 through August 2014, serial changes in cerebral rSO2 in seven patients were evaluated. According to the results of the serial changes in rSO2, four patterns of rSO2 change were found, as follows. Type 1: High rSO2 (around about 60 %) type (n = 1). Initial electrocardiogram was ventricular fibrillation and ROSC (return of spontaneous circulation) could be diagnosed in pre-hospital setting. Her outcome at discharge was Good Recovery (GR). Type 2: Low rSO2 (around about 45–50 %) type (n = 3). They did not get ROSC even once. Type 3: Gradually decreasing rSO2 type (n = 2): ROSC could be diagnosed in hospital, but not in pre-hospital setting. Their outcomes at discharge were not GR. Type 4: other type (n = 1). In this patient with ROSC when ELT started cerebral rSO2 measurement, cerebral rSO2 was 67.3 % at measurement start, it dropped gradually to 54.5 %, and then rose to 74.3 %. The cerebral oxygenation was impaired due to possible cardiac arrest again, and after that, ROSC led to the recovery of cerebral blood flow. Conclusion We could measure serial changes in cerebral rSO2 in seven patients with OHCA in the pre-hospital setting. Our data suggest that pre-hospital monitoring of cerebral rSO2 might lead to a new resuscitation strategy. Electronic supplementary material The online version of this article (doi:10.1186/s13104-016-2239-4) contains supplementary material, which is available to authorized users.

Published
2016

3. Message from New President

Author

Yasuto Hamada

Subjects
Media Technology, Electrical and Electronic Engineering, Computer Science Applications
Published
2017

4. Pre-hospital portable monitoring of cerebral regional oxygen saturation (rSO2) in seven patients with out-of-hospital cardiac arrest.

Author

Tomoya Hirose, Tadahiko Shiozaki, Junji Nomura, Yasuto Hamada, Keiichi Sato, Kazuya Katsura, Naoki Ehara, Akinori Wakai, Kentaro Shimizu, Mitsuo Ohnishi, Sumito Hayashida, Daikai Sadamitsu, and Takeshi Shimazu

Subjects
PATIENT monitoring, CARDIAC arrest, RESUSCITATION, LIFESAVING equipment, VENTRICULAR fibrillation, PATIENTS
Abstract

Background: In recent years, measurement of cerebral regional oxygen saturation (rSO2) has attracted attention during resuscitation. However, serial changes of cerebral rSO2 in pre-hospital settings are unclear. The objective of this study was to clarify serial changes in cerebral rSO2 of patients with out-of-hospital cardiac arrest (OHCA) in the prehospital setting. Methods: We recently developed a portable rSO2 monitor that is small (170 × 100 × 50 mm in size and 600 g in weight) enough to carry in pre-hospital settings. The sensor is attached to the patient's forehead by the ELT (Emergency Life-saving Technician), and it monitors rSO2 continuously. Results: From June 2013 through August 2014, serial changes in cerebral rSO2 in seven patients were evaluated. According to the results of the serial changes in rSO2, four patterns of rSO2 change were found, as follows. Type 1: High rSO2 (around about 60 %) type (n = 1). Initial electrocardiogram was ventricular fibrillation and ROSC (return of spontaneous circulation) could be diagnosed in pre-hospital setting. Her outcome at discharge was Good Recovery (GR). Type 2: Low rSO2 (around about 45-50 %) type (n = 3). They did not get ROSC even once. Type 3: Gradually decreasing rSO2 type (n = 2): ROSC could be diagnosed in hospital, but not in pre-hospital setting. Their outcomes at discharge were not GR. Type 4: other type (n = 1). In this patient with ROSC when ELT started cerebral rSO2 measurement, cerebral rSO2 was 67.3 % at measurement start, it dropped gradually to 54.5 %, and then rose to 74.3 %. The cerebral oxygenation was impaired due to possible cardiac arrest again, and after that, ROSC led to the recovery of cerebral blood flow. Conclusion: We could measure serial changes in cerebral rSO2 in seven patients with OHCA in the pre-hospital setting. Our data suggest that pre-hospital monitoring of cerebral rSO2 might lead to a new resuscitation strategy. [ABSTRACT FROM AUTHOR]

Published
2016
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