基本情報
- 所属
- 自治医科大学 麻酔科 / 医学部総合医学第2講座 准教授
- 研究者番号
- 20650857
- ORCID ID
- https://orcid.org/0000-0002-2071-3898
- J-GLOBAL ID
- 202101016122264634
- researchmap会員ID
- R000018711
論文
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General thoracic and cardiovascular surgery 2024年7月17日OBJECTIVE: Systemic heparinization during cardiopulmonary bypass (CPB) can significantly affect thromboelastography (TEG). This study investigated the feasibility of adding protamine in vitro to allow assessment of coagulation status using the TEG 6s system during CPB. METHODS: In this prospective observational study, 21 patients undergoing elective cardiac valve surgery were evaluated. During CPB, protamine was added in vitro to the heparinized blood of these patients at a concentration of 0.05 mg/mL and analyzed with the TEG 6s (Pre). The TEG parameters were compared to those analyzed after CPB withdrawal and systemic protamine administration (Post). RESULTS: The citrated kaolin maximal amplitude (CK-MA) and the citrated functional fibrinogen maximal amplitude (CFF-MA) exhibited strong correlations between Pre and Post measurements (r = 0.790 and 0.974, respectively, P < 0.001 for both), despite significant mean differences (-2.23 mm for CK-MA and -0.68 mm for CFF-MA). Bland-Altman analysis showed a clinically acceptable agreement between Pre and Post measurement of CK-MA and CFF-MA (the percentage error was 10.6% and 12.2%, respectively). In contrast, the citrated kaolin reaction time (CK-R) showed no significant correlation between Pre and Post measurements (r = 0.328, P = 0.146), with a mean difference of 1.42 min (95% CI: -0.45 to 3.29). CONCLUSIONS: In vitro protamine addition allows assessment of coagulation status during CPB using the TEG 6s system. CK-MA and CFF-MA measured during CPB using this method revealed a strong correlation and agreement with post-CPB measurements, suggesting that our method potentially facilitates early prediction of post-CPB coagulation status and decision-making on transfusion strategies. CLINICAL TRIAL REGISTRATION: The study was registered in the University Hospital Medical Information Network Clinical Trials Registry (UMIN-CTR, registration number: UMIN000041097, date of registration: July 13, 2020, https://center6.umin.ac.jp/cgi-open-bin/ctr_e/ctr_view.cgi?recptno=R000046925 ) before the recruitment of participants.
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BMC anesthesiology 24(1) 88-88 2024年3月2日BACKGROUND: Tracking preload dependency non-invasively to maintain adequate tissue perfusion in the perioperative period can be challenging.The effect of phenylephrine on stroke volume is dependent upon preload. Changes in stroke volume induced by phenylephrine administration can be used to predict preload dependency. The change in the peripheral perfusion index derived from photoplethysmography signals reportedly corresponds with changes in stroke volume in situations such as body position changes in the operating room. Thus, the peripheral perfusion index can be used as a non-invasive potential alternative to stroke volume to predict preload dependency. Herein, we aimed to determine whether changes in perfusion index induced by the administration of phenylephrine could be used to predict preload dependency. METHODS: We conducted a prospective single-centre observational study. The haemodynamic parameters and perfusion index were recorded before and 1 and 2 min after administering 0.1 mg of phenylephrine during post-induction hypotension in patients scheduled to undergo surgery. Preload dependency was defined as a stroke volume variation of ≥ 12% before phenylephrine administration at a mean arterial pressure of < 65 mmHg. Patients were divided into four groups according to total peripheral resistance and preload dependency. RESULTS: Forty-two patients were included in this study. The stroke volume in patients with preload dependency (n = 23) increased after phenylephrine administration. However, phenylephrine administration did not impact the stroke volume in patients without preload dependency (n = 19). The perfusion index decreased regardless of preload dependency. The changes in the perfusion index after phenylephrine administration exhibited low accuracy for predicting preload dependency. Based on subgroup analysis, patients with high total peripheral resistance tended to exhibit increased stroke volume following phenylephrine administration, which was particularly prominent in patients with high total peripheral resistance and preload dependency. CONCLUSION: The findings of the current study revealed that changes in the perfusion index induced by administering 0.1 mg of phenylephrine could not predict preload dependency. This may be attributed to the different phenylephrine-induced stroke volume patterns observed in patients according to the degree of total peripheral resistance and preload dependency. TRIAL REGISTRATION: University Hospital Medical Information Network (UMIN000049994 on 9/01/2023).
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Journal of Cardiothoracic and Vascular Anesthesia 38(2) 394-402 2024年2月
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Critical care (London, England) 27(1) 412-412 2023年10月28日BACKGROUND: It has been 50 years since the pulmonary artery catheter was introduced, but the actual use of pulmonary artery catheters in recent years is unknown. Some randomized controlled trials have reported no causality with mortality, but some observational studies have been published showing an association with mortality for patients with cardiogenic shock, and the association with a pulmonary artery catheter and mortality is unknown. The aim of this study was to investigate the utilization of pulmonary artery catheters (PACs) in the intensive care unit (ICU) and to examine their association with mortality, taking into account differences between hospitals. METHODS: This is a retrospective analysis using the Japanese Intensive care PAtient Database, a multicenter, prospective, observational registry in Japanese ICUs. We included patients aged 16 years or older who were admitted to the ICU for reasons other than procedures. We excluded patients who were discharged within 24 h or had missing values. We compared the prognosis of patients with and without PAC. The primary outcome was hospital mortality. We performed propensity score analysis to adjust for baseline characteristics and hospital characteristics. RESULTS: Among 184,705 patients in this registry from April 2015 to December 2020, 59,922 patients were included in the analysis. Most patients (94.0%) with a PAC in place had cardiovascular disease. There was a wide variation in the frequency of PAC use between hospitals, from 0 to 60.3% (median 14.4%, interquartile range 2.2-28.6%). Hospital mortality was not significantly different between the PAC use group and the non-PAC use group in patients after adjustment for propensity score analysis (3.9% vs 4.3%; difference, - 0.4%; 95% CI - 1.1 to 0.3; p = 0.32). Among patients with cardiac disease, those with post-open-heart surgery and those in shock, hospital mortality was also not significantly different between the two groups (3.4% vs 3.7%, p = 0.45, 1.7% vs 1.7%, p = 0.93, 4.8% vs 4.9%, p = 0.87). CONCLUSIONS: The frequency of PAC use varied among hospitals. PAC use for ICU patients was not associated with lower hospital mortality after adjusting for differences between hospitals.
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Journal of cardiovascular development and disease 10(7) 2023年7月10日BACKGROUND: The incidence of delirium is high in older patients undergoing cardiovascular surgery with cardiopulmonary bypass (CPB). Intraoperative tissue hypoperfusion and re-reperfusion injury, which generate reactive oxygen species (ROS), are suggested to induce delirium. Ascorbic acid is an excellent antioxidant and may reduce organ damage by inhibiting the production of ROS. This prospective observational study aimed to measure pre- and postoperative plasma ascorbic acid levels and examine their association with delirium. METHODS: Patients older than 70 years of age scheduled for elective cardiovascular surgery using CPB were enrolled. From September 2020 to December 2021, we enrolled 100 patients, and the data of 98 patients were analyzed. RESULTS: In total, 31 patients developed delirium, while 67 did not. Preoperative plasma ascorbic acid levels did not differ between the non-delirium and delirium groups (6.0 ± 2.2 vs. 5.5 ± 2.4 µg/mL, p = 0.3). Postoperative plasma ascorbic acid levels were significantly different between the groups (2.8 [2.3-3.5] vs. 2.3 [1.6-3.3] µg/mL, p = 0.037). CONCLUSIONS: In patients who undergo cardiovascular surgery with CPB, lower postoperative plasma ascorbic acid levels may be associated with the development of delirium.
MISC
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人工呼吸 39(2) 81-121 2022年11月日本集中治療医学会/日本呼吸器学会/日本呼吸療法医学会ARDS診療ガイドライン作成委員会は、今回、合同で『ARDS診療ガイドライン2021』を作成した。2016年版の診療ガイドラインでは、成人のみを対象とした臨床課題(clinical question:CQ)を取り上げたが、今回は成人の46のCQに加えて小児を対象とした15のCQも作成した。前回と同様、GRADE(Grading of Recommendations Assessment,Development and Evaluation)システムを用いた推奨度決定の手法を用いた。また、新たな手法として診断精度のメタ解析およびネットワークメタ解析を用いたシステマティックレビュー(systematic review:SR)も行った。これらにより、より充実した信頼性の高い実用的な診療ガイドラインを作成することができた。(著者抄録)
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日本集中治療医学会雑誌 29(4) 295-332 2022年7月日本集中治療医学会/日本呼吸器学会/日本呼吸療法医学会ARDS診療ガイドライン作成委員会は,今回,合同で『ARDS診療ガイドライン2021』を作成した。2016年版の診療ガイドラインでは,成人のみを対象とした臨床課題(clinical question:CQ)を取り上げたが,今回は成人の46のCQに加えて小児を対象とした15のCQも作成した。前回と同様,GRADE(Grading of Recommendations Assessment,Development and Evaluation)システムを用いた推奨度決定の手法を用いた。また,新たな手法として診断精度のメタ解析およびネットワークメタ解析を用いたシステマティックレビュー(systematic review:SR)も行った。これらにより,より充実した信頼性の高い実用的な診療ガイドラインを作成することができた。(著者抄録)
講演・口頭発表等
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日本集中治療医学会雑誌 2017年11月 (一社)日本集中治療医学会2013年7月〜2014年2月にスケールベッドで体重測定を行う施設A 29名と懸架で体重測定を行う施設B 30名の2施設のICU医師・看護師59名(男性25名、女性34名)を対象に、体重測定値の測定誤差および立位とスケールベッド、立位と懸架の相関について検討した。スケールベッド、懸架ともに立位に対し相関係数0.99以上で高い相関がみられた。スケールベッド、懸架ともにライン類装着により測定誤差が1.0〜1.2kg上昇したが、ライン類保持により、ラインを装着せず測定したレベルまで低下した。スケールベッドの測定誤差は全ての測定状況において、懸架の測定誤差より小さい傾向がみられた。
共同研究・競争的資金等の研究課題
1-
日本学術振興会 科学研究費助成事業 若手研究 2020年4月 - 2023年3月