Yamada, Takashige

写真a

Affiliation

School of Medicine, Department of Anesthesiology (Shinanomachi)

Position

Professor

External Links
Page Top ▲
 

Papers 【 Display / hide 】

  • Interaction between anesthetic conditioning and ischemic preconditioning on metabolic function after hepatic ischemia-reperfusion in rabbits

    T. Yamada, H. Nagata, S. Kosugi, T. Suzuki, H. Morisaki and Y. Kotake

    J Anesth 32 ( 4 ) 599 - 607 2018.08

    ISSN  1438-8359

    　View Summary

    BACKGROUND: Both anesthetic-induced and ischemic preconditioning are protective against hepatic ischemia-reperfusion injury. However, the effects of these preventive methods on the metabolic function remain to be elucidated. We investigated the anesthetic conditioning and ischemic preconditioning on the metabolic function of the rabbit model of hepatic ischemia-reperfusion. METHODS: After approval by the institutional animal care and use committee, 36 Japanese White rabbits underwent partial hepatic ischemia for 90 min either under sevoflurane or propofol anesthesia. All the rabbits underwent 90 min of hepatic ischemia, and half of the rabbits in each group underwent additional 10-min ischemia and 10-min reperfusion before index ischemia. Hepatic microvascular blood flow was intermittently measured during reperfusion period, and galactose clearance, serum aminotransferase activities, and lactate concentrations were determined 180 min after reperfusion. RESULTS: Neither anesthetic conditioning with sevoflurane nor ischemic preconditioning altered hepatic microvascular blood flow during reperfusion and serum transaminase activities after reperfusion. However, galactose clearance of reperfused liver was significantly higher under sevoflurane anesthesia than propofol (0.016 +/- 0.005/min vs. 0.011 +/- 0.004/min). Statistically significant interaction between anesthetic choice and application of ischemic preconditioning suggests that the ischemic preconditioning is selectively protective under propofol anesthesia. Increase of blood lactate concentration was significantly suppressed under sevoflurane anesthesia compared to propofol (1.5 +/- 0.8 vs. 3.9 +/- 1.4 mmol/l) without any statistically significant interaction with the application of ischemic preconditioning. CONCLUSION: Sevoflurane attenuated the decrease of galactose clearance and increase of the blood lactate after reperfusion compared to propofol. Application of ischemic preconditioning was significantly protective under propofol anesthesia.

  • Cardiac output and stroke volume variation measured by the pulse wave transit time method: a comparison with an arterial pressure-based cardiac output system

    T. Suzuki, Y. Suzuki, J. Okuda, R. Minoshima, Y. Misonoo, T. Ueda, J. Kato, H. Nagata, T. Yamada and H. Morisaki

    J Clin Monit Comput  2018.06

    ISSN  1573-2614

    　View Summary

    Hemodynamic monitoring is mandatory for perioperative management of cardiac surgery. Recently, the estimated continuous cardiac output (esCCO) system, which can monitor cardiac output (CO) non-invasively based on pulse wave transit time, has been developed. Patients who underwent cardiovascular surgeries with hemodynamics monitoring using arterial pressure-based CO (APCO) were eligible for this study. Hemodynamic monitoring using esCCO and APCO was initiated immediately after intensive care unit admission. CO values measured using esCCO and APCO were collected every 6 h, and stroke volume variation (SVV) data were obtained every hour while patients were mechanically ventilated. Correlation and Bland-Altman analyses were used to compare APCO and esCCO. Welch's analysis of variance, and four-quadrant plot and polar plot analyses were performed to evaluate the effect of time course, and the trending ability. A p-value < 0.05 was considered statistically significant. Twenty-one patients were included in this study, and 143 and 146 datasets for CO and SVV measurement were analyzed. Regarding CO, the correlation analysis showed that APCO and esCCO were significantly correlated (r = 0.62), and the bias +/- precision and percentage error were 0.14 +/- 1.94 (L/min) and 69%, respectively. The correlation coefficient, bias +/- precision, and percentage error for SVV evaluation were 0.4, - 3.79 +/- 5.08, and 99%, respectively. The time course had no effects on the biases between CO and SVV. Concordance rates were 80.3 and 75.7% respectively. While CO measurement with esCCO can be a reliable monitor after cardiovascular surgeries, SVV measurement with esCCO may require further improvement.

  • Automated Assessment of Existing Patient's Revised Cardiac Risk Index Using Algorithmic Software

    I. S. Hofer, D. Cheng, T. Grogan, Y. Fujimoto, T. Yamada, L. Beck, M. Cannesson and A. Mahajan

    Anesth Analg  2018.05

    ISSN  1526-7598

    　View Summary

    BACKGROUND: Previous work in the field of medical informatics has shown that rules-based algorithms can be created to identify patients with various medical conditions; however, these techniques have not been compared to actual clinician notes nor has the ability to predict complications been tested. We hypothesize that a rules-based algorithm can successfully identify patients with the diseases in the Revised Cardiac Risk Index (RCRI). METHODS: Patients undergoing surgery at the University of California, Los Angeles Health System between April 1, 2013 and July 1, 2016 and who had at least 2 previous office visits were included. For each disease in the RCRI except renal failure-congestive heart failure, ischemic heart disease, cerebrovascular disease, and diabetes mellitus-diagnosis algorithms were created based on diagnostic and standard clinical treatment criteria. For each disease state, the prevalence of the disease as determined by the algorithm, International Classification of Disease (ICD) code, and anesthesiologist's preoperative note were determined. Additionally, 400 American Society of Anesthesiologists classes III and IV cases were randomly chosen for manual review by an anesthesiologist. The sensitivity, specificity, accuracy, positive predictive value, negative predictive value, and area under the receiver operating characteristic curve were determined using the manual review as a gold standard. Last, the ability of the RCRI as calculated by each of the methods to predict in-hospital mortality was determined, and the time necessary to run the algorithms was calculated. RESULTS: A total of 64,151 patients met inclusion criteria for the study. In general, the incidence of definite or likely disease determined by the algorithms was higher than that detected by the anesthesiologist. Additionally, in all disease states, the prevalence of disease was always lowest for the ICD codes, followed by the preoperative note, followed by the algorithms. In the subset of patients for whom the records were manually reviewed, the algorithms were generally the most sensitive and the ICD codes the most specific. When computing the modified RCRI using each of the methods, the modified RCRI from the algorithms predicted in-hospital mortality with an area under the receiver operating characteristic curve of 0.70 (0.67-0.73), which compared to 0.70 (0.67-0.72) for ICD codes and 0.64 (0.61-0.67) for the preoperative note. On average, the algorithms took 12.64 +/- 1.20 minutes to run on 1.4 million patients. CONCLUSIONS: Rules-based algorithms for disease in the RCRI can be created that perform with a similar discriminative ability as compared to physician notes and ICD codes but with significantly increased economies of scale.

  • Anaphylactic Reactions to Native and Light-Exposed Sugammadex Suggested by Basophil Activation Test: A Report of 2 Cases

    T. Yamada, T. Suzuki, R. Murase, H. Nagata and S. Kosugi

    A A Pract  2018.04

    ISSN  2575-3126

    　View Summary

    We describe 2 patients who developed anaphylactic shock after sugammadex administration during anesthesia. Both had no history of prior sugammadex administration. The serum tryptase concentrations were elevated after the allergic reaction. Basophil activation testing 1 month after the events was positive for sugammadex in 1 patient, and negative in the other. However, it was positive for light-exposed sugammadex solution in both patients, suggesting a possible allergic reaction to a denatured compound of sugammadex generated by light exposure of the sugammadex solution.

  • Improving Perioperative Outcomes Through Minimally Invasive and Non-invasive Hemodynamic Monitoring Techniques

    T. Yamada, S. Vacas, Y. Gricourt and M. Cannesson

    Front Med (Lausanne) 5   144 2018

    ISSN  2296-858X

    　View Summary

    An increasing number of patients require precise intraoperative hemodynamic monitoring due to aging and comorbidities. To prevent undesirable outcomes from intraoperative hypotension or hypoperfusion, appropriate threshold settings are required. These setting can vary widely from patient to patient. Goal-directed therapy techniques allow for flow monitoring as the standard for perioperative fluid management. Based on the concept of personalized medicine, individual assessment and treatment are more advantageous than conventional or uniform interventions. The recent development of minimally and noninvasive monitoring devices make it possible to apply detailed control, tracking, and observation of broad patient populations, all while reducing adverse complications. In this manuscript, we review the monitoring features of each device, together with possible advantages and disadvantages of their use in optimizing patient hemodynamic management.

display all >>

Page Top ▲

Papers, etc., Registered in KOARA 【 Display / hide 】

display all >>

Page Top ▲

Research Projects of Competitive Funds, etc. 【 Display / hide 】

  • 硬膜外麻酔の癌再発抑制機序の解明

    2013.04
    -
    2015.03

    Grant-in-Aid for Scientific Research, Principal investigator

  • 菌の鉄獲得機構阻害による静菌効果と臨床応用に向けた試み

    2012.04
    -
    2014.03

    Grant-in-Aid for Scientific Research, Coinvestigator(s)

  • 肝虚血再灌流障害における環状グアノシン一リン酸の関与

    2007.04
    -
    2009.03

    Grant-in-Aid for Scientific Research, Principal investigator

Page Top ▲
 

Courses Taught 【 Display / hide 】

  • PATHOPHYSIOLOGICAL ISSUES IN ACUTE CARE

    2024

  • LECTURE SERIES, ANESTHESIOLOGY AND PALLIATIVE CARE

    2024

  • CLINICAL CLERKSHIP IN ANESTHESIOLOGY AND PALLIATIVE CARE

    2024

  • LECTURE SERIES, ANESTHESIOLOGY AND PALLIATIVE CARE

    2023

  • CLINICAL CLERKSHIP IN ANESTHESIOLOGY AND PALLIATIVE CARE

    2023

display all >>

Page Top ▲