Search

Your search keyword '"Tanaka, Ryusuke"' showing total 270 results
Start Over Author "Tanaka, Ryusuke"
270 results on '"Tanaka, Ryusuke"'

17. Differential effects of sevoflurane and propofol on an electroretinogram and visual evoked potentials

Author

Tanaka, Ryusuke, Tanaka, Satoshi, Ichino, Takashi, Ishida, Takashi, Fuseya, Satoshi, and Kawamata, Mikito

Subjects
Sevoflurane -- Analysis, Phenols -- Analysis, Anesthetics -- Analysis, Remifentanil -- Analysis, Propofol -- Analysis, Health
Abstract

The purpose of this study was to simultaneously evaluate the effects of sevoflurane and propofol on an electroretinogram (ERG) and visual evoked potentials (VEPs). Twenty-four patients scheduled for elective surgery under general anesthesia were allocated randomly to receive either sevoflurane (group S) or propofol (group P). An ERG and VEPs were recorded in an awake state and during anesthesia with three different minimum alveolar concentrations (MAC; 0.5, 1.0, and 1.5) of sevoflurane in group S or with three different effect-site concentrations (Ce) of 2, 3, and 4 [mu]g/ml by using a target-controlled infusion technique in group P. Sevoflurane and propofol had little effect on amplitudes of the ERG b-wave. Sevoflurane significantly attenuated the amplitudes of VEP N75-P100 at 0.5, 1.0, and 1.5 MAC. Propofol did not significantly decrease the amplitude of VEPs at Ce of 2 or 3 [mu]g/ml but significantly decreased it at Ce of 4 [mu]g/ml. In summary, propofol and sevoflurane at clinical concentrations had little effect on the amplitude of an ERG. Sevoflurane attenuated the amplitudes of VEPs even at low concentrations. Propofol also attenuated the amplitudes of VEPs to a lesser extent compared to sevoflurane., Author(s): Ryusuke Tanaka [sup.1], Satoshi Tanaka [sup.1], Takashi Ichino [sup.1], Takashi Ishida [sup.1], Satoshi Fuseya [sup.1], Mikito Kawamata [sup.1] Author Affiliations: (1) grid.263518.b, 0000 0001 1507 4692, Department of Anesthesiology [...]

Published
2020
Full Text
View/download PDF

20. Effects of Hot-Spring Water Culture on the Nutritional Value of Muscle from Japanese Eel Anguilla japonica.

Author

Ishimaru, Mami, Uchida, Katsuhisa, Taoka, Yousuke, Matsumoto, Tomoko, and Tanaka, Ryusuke

Subjects
ANGUILLA japonica, NUTRITIONAL value, WELL water, EELS, ENERGY industries
Abstract

The chemical composition of muscles from Japanese eels cultured in hot-spring water was determined and compared with that of eels cultured in well water. The proximate composition did not differ significantly between the culture conditions, but the hepatosomatic indices of the hot-spring water eels were significantly higher than those of the well water eels. Amino acid levels were higher in the hot-spring water eels, and the carnosine content of the hot-spring eels was lower than that of the controls. Our results suggest that hot-spring water is a promising medium for eel culture, and its use may bring energy cost savings. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

23. Transcranial motor-evoked potentials of laryngeal muscles for intraoperative neuromonitoring of the vagus nerve during thyroid surgery

Author

Ichino, Takashi, Tanaka, Satoshi, Tanaka, Ryusuke, Tanaka, Naruaki, Ishida, Takashi, Sugiyama, Yuki, and Kawamata, Mikito

Subjects
Sugammadex -- Research, Surgery -- Research, Remifentanil -- Research, Health
Abstract

Purpose The aim of this study was to elucidate normative features of vagal motor-evoked potentials (MEPs) induced by transcranial electrical stimulation (TES) and to determine the influence of functional decline of the recurrent laryngeal nerve (RLN) on vagal MEPs during thyroid surgery. Methods A total of 54 patients undergoing elective thyroid surgery under general anesthesia were enrolled in this study. Vagal MEPs induced by TES were measured from the vocal cord using one of two types of electrodes (wire type or wide and flat type) mounted on an endotracheal tube. We investigated the effects of stimulation intensity and train pulse number on vagal MEP amplitude, the time course of vagal MEP amplitude during surgery, and the effects of functional decline of the RLN on vagal MEPs. Results The success rate of vagal MEP monitoring with wide- and flat-type electrodes was significantly higher than that with wire-type electrodes. Reliable vagal MEPs were obtained at a stimulation intensity of approximately 300 V with 3 or more pulses in 91% of the patients without preoperative RLN palsy (RLNP), and the amplitude was augmented with increasing stimulation intensity and train pulse number. Vagal MEP amplitude decreased during thyroid surgery and then partially recovered at the end of surgery. Vagal MEP amplitude recorded from the electrode ipsilateral to preoperative RLNP was significantly lower than that on the contralateral intact side. Conclusion Vagal MEPs induced by TES can be obtained with a high success rate during thyroid surgery and would reflect functional status of the RLN., Author(s): Takashi Ichino [sup.1], Satoshi Tanaka [sup.1], Ryusuke Tanaka [sup.1], Naruaki Tanaka [sup.1], Takashi Ishida [sup.1], Yuki Sugiyama [sup.1], Mikito Kawamata [sup.1] Author Affiliations: (1) 0000 0001 1507 4692, grid.263518.b, [...]

Published
2019
Full Text
View/download PDF

45. Successful Management of a Patient with Intraoperative Bleeding of More than 80,000 mL and Usefulness of QTc Monitoring for Calcium Correction

Author

Sugiyama, Yuki, Aiba, Kazuma, Arai, Nariaki, Ito, Mariko, Urasawa, Masatoshi, Hirose, Chie, Murakami, Ikuko, Tanaka, Ryusuke, Yamada, Tomokatsu, Iida, Keisuke, Nakamura, Hiroyuki, and Kawamata, Mikito

Subjects
Article Subject
Abstract

Intraoperative massive bleeding is associated with high rates of mortality and anesthetic management of massive bleeding is challenging because it is necessary to achieve volume resuscitation and electrolyte correction simultaneously during massive transfusion. We report a case of life-threatening bleeding of more than 80,000 mL during liver transplantation in which real-time QTc monitoring was useful for an extremely large amount of calcium administration for treatment of hypocalcemia. A 47-year-old female with a giant liver due to polycystic liver disease was scheduled to undergo liver transplantation. During surgery, life-threatening massive bleeding occurred. The maximum rate of blood loss was approximately 15,000 mL/hr and the total amount of estimated blood loss was 81,600 mL. It was extremely difficult to maintain blood pressure and a risk of cardiac arrest continued due to hypotension. In addition, even though administration of insulin and calcium was performed, electrolyte disturbances of hyperkalemia and hypocalcemia with prolongation of QTc interval occurred. At that time, we visually noticed that the QT interval was shortened in response to bolus calcium administration, and we used the change of real-time QTc interval as a supportive indicator for calcium correction. This monitoring allowed for us to administer calcium at an unusually high rate, by which progression of hypocalcemia was prevented. Levels of hemoglobin and coagulation factors were preserved both by restriction of crystalloid infusion and by a massive transfusion protocol. The patient was extubated without pulmonary edema or cardiac overload and was finally discharged without any sequelae. Intensive and cooperative management for massive transfusion and electrolyte correction using QTc monitoring was considered to be a key for successful management.

Published
2021
Full Text
View/download PDF

49. 保育園児の魚介類およびその料理に対する嗜好（2016年）：肉類・乳類との比較（温故知新プロジェクト）

Author

Totsuka, Kiyoko, Shimamura, Aya, Tanaka, Ryusuke, and Mineki, Machiko

Subjects
家政学・生活科学
Abstract

東京家政大学生活科学研究所研究報告は、本研究所の本年度の活動成果を取りまとめたものです。本研究報告の内容の一部は、別途学会誌等に発表されることがありますのでご了承ください。

Published
2018

Catalog

Books, media, physical & digital resources
See catalog results