Dexmedetomidine-esketamine and tDCS for Prevention of Neurocognitive Complications After Surgery
Perioperative Use of Dexmedetomidine-esketamine Combination and Transcranial Direct Current Stimulation for Prevention of Neurocognitive Complications in Older Patients After Non-cardiac Surgery: a 2×2 Factorial Trial
Обзор исследования
Статус
Условия
Вмешательство/лечение
Подробное описание
Alone with aging population, the number of older patients undergoing surgery is also increasing. Neurocognitive complications, mainly delirium and neurocognitive disorders, are common cerebral complications in older patients after surgery and associated with worse outcomes. Risk factors of postoperative neurocognitive complications are multifactorial and include predisposing and precipitating factors. Of these, older age and pre-existing cognitive decline are important predisposing factors; surgical trauma, postoperative pain, and postoperative sleep disturbances are important precipitating factors.
Dexmedetomidine is a highly selective alpha 2 adrenergic receptor agonist with sedative, analgesic, and anxiolytic effects. Perioperative use of dexmedetomidine improves analgesia and sleep quality after surgery, an relieves surgery-related stress response and inflammation. Accumulating evidence showed that perioperative dexmedetomidine decreased early postoperative delirium and delayed neurocognitive recovery in older patients. The effect of perioperative dexmedetomidine is dose-dependent; however, routine dose dexmedetomidine increases bradycardia and hypotension which are potentially harmful to older patients.
Ketamine is a noncompetitive N-Methyl-D-aspartic acid (NMDA) receptor antagonist and has been used as an anesthetic and analgesic for decades. Esketamine is the S-enantiomer of ketamine and twice as potent as racemic ketamine. Recent studies found that subanesthetic dose of ketamine or esketamine is effective in improving analgesia and sleep quality and relieving depression; it also attenuated surgery-related stress response. However, even subanesthetic ketamine or esketamine increases neuropsychiatric side effects and is not recommended to be used alone for analgesia and sedation.
In clinical practice, the sedative effect of exmedetomidine is used to relieve the neuropsychiatric side effects of ketamine/esketamine, and the sympathomimetic effect of ketamine/esketamine can be used to counteract the sympatholytic effect of dexmedetomidine. Combination of dexmedetomidine and esketamine has been used for premedication in children and postoperative analgesia in adults and showed additive or synergistic effects. The investigators hypothesize that perioperative combined use of low dose dexmedetomidine and esketamine may be more effective in preventing postoperative delirium and delayed neurocognitive recovery in older patients.
Transcranial direct current stimulation (tDCS) is a non-invasive neuromodulation technique and increasingly used for treatment of various neurological diseases such as neurodevelopmental disorders and post-stroke dysphagia. Preliminary studies in the perioperative settings showed that perioperative use of tDCS improved sleep quality and reduced delirium occurrence early after surgery. The investigators hypothesize that perioperative use of tDCS may help reduce early postoperative delayed neurocognitive recovery in older patients.
This 2×2 factorial trial is designed to investigate the effects of perioperative dexmedetomidine-esketamine combination and tDCS on early postoperative neurocognitive recovery and delirium occurrence in older patients.
Тип исследования
Регистрация (Оцененный)
Фаза
- Фаза 4
Контакты и местонахождение
Контакты исследования
- Имя: Dong-Xin Wang, MD, PHD
- Номер телефона: 86 10 83572784
- Электронная почта: wangdongxin@hotmail.com
Учебное резервное копирование контактов
- Имя: Zhen-Zhen Xu, MD
- Номер телефона: 86 10 83572460
- Электронная почта: zjxvzhenzhen@126.com
Места учебы
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Beijing Municipality
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Beijing, Beijing Municipality, Китай, 100034
- Peking University First Hospital
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Контакт:
- Zhen-Zhen Xu, MD
- Номер телефона: 86 10 83572460
- Электронная почта: zjxvzhenzhen@126.com
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Контакт:
- Dong-Xin Wang, MD, PhD
- Номер телефона: +86 10 83572784
- Электронная почта: wangdongxin@hotmail.com
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Fujian
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Fuzhou, Fujian, Китай, 362011
- Fujian Medical University Union Hospital
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Контакт:
- Dan-Feng Zhang, MD
- Электронная почта: mazui1234@163.com
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Guangdong
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Shenzhen, Guangdong, Китай, 518036
- Peking University Shenzhen Hospital
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Контакт:
- Tao Luo, MD
- Электронная почта: 496855048@qq.com
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Shaanxi
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Xi'an, Shaanxi, Китай, 710032
- Xijing Hospital, Air Force Medical University
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Контакт:
- Zhi-Hong Lu, MD
- Электронная почта: deerlu23@163.com
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Zhejiang
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Hangzhou, Zhejiang, Китай, 310006
- First Affilited Hospital, School of Medicine, Zhejiang University
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Контакт:
- Dian-San Su, MD
- Электронная почта: diansansu@yahoo.com
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Hangzhou, Zhejiang, Китай, 310009
- Second Affilited Hospital, School of Medicine, Zhejiang University
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Контакт:
- Min Yan, MD
- Электронная почта: zryanmin@zju.edu.cn
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Критерии участия
Критерии приемлемости
Возраст, подходящий для обучения
- Пожилой взрослый
Принимает здоровых добровольцев
Описание
Inclusion Criteria:
- Aged 65 to 90 years;
- Preoperative Mini-Mental State Examination (MMSE) score < 27 points, indicating possible cognitive impairment ranging from mild to moderate;
- Scheduled to undergo elective non-cardiac, non-neurosurgical surgery under general anesthesia, with an expected surgical duration > 1 hour;
- Required patient-controlled intravenous analgesia (PCIA) after surgery.
Exclusion Criteria:
- Preoperative inability to communicate due to coma, severe dementia, end-stage disease, or language impairment;
- History of schizophrenia, epilepsy, Parkinson's disease, brain trauma/surgery, or myasthenia gravis;
- Presence of metal implants in the intracranial or cervical region (such as cochlear implants, aneurysm clips, deep brain stimulation electrodes), or skin damage or severe skin disease on the head;
- Severe cardiac dysfunction (left ventricular ejection fraction < 30%), comorbid with sick sinus syndrome, severe bradycardia (heart rate < 50 bpm), or second-degree or higher atrioventricular block, or implantation of a cardiac pacemaker;
- Uncontrolled hyperthyroidism or pheochromocytoma;
- Severe liver dysfunction (Child-Pugh class C), severe renal dysfunction (requiring dialysis), or ASA classification ≥ IV;
- Allergy to dexmedetomidine or esketamine;
- Participation in other clinical studies within the past 3 months;
- Other conditions that are deemed unsuitable for study participation.
Учебный план
Как устроено исследование?
Детали дизайна
- Основная цель: Профилактика
- Распределение: Рандомизированный
- Интервенционная модель: Факторное присвоение
- Маскировка: Четырехместный
Оружие и интервенции
Группа участников / Армия |
Вмешательство/лечение |
|---|---|
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Экспериментальный: Dex-Esk + active tDCS
Participants will receive dexmedetomidine-esketamine (Dex-Esk) combination and active transcranial direct current stimulation (tDCS).
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Active transcranial direct current stimulation (tDCS) will be administered using a battery-powered stimulator. The anode will be positioned over the left dorsolateral prefrontal cortex (DLPFC, F3) and the cathode over the right supraorbital region (Fp2). The stimulation intensity will be set at 2.0 mA, featuring a 30-second linear ramp-up at the beginning and a 30-second ramp-down at the end of each session. Each participant will receive a total of three 20-minute sessions of active tDCS. The first session will be provided at 40 minutes after extubation in the post-anesthesia care unit. Two other sessions will be provided on postoperative days 1 and 2 (between 10:00 and 12:00 am).
Другие имена:
Dexmedetomidine-esketamine combination (1 μg/mL dexmedetomidine and 0.5 mg/mL esketamine) will be administered after anesthesia induction, firstly as a loading dose at a rate of [0.4 x body weight (kg)] mL/h for 30 minutes (0.2 μg/kg dexmedetomidine and 0.1 mg/kg esketamine), followed by a maintenance infusion at a rate of [0.1 x body weight (kg)] mL/h (0.1 μg/kg/h dexmedetomidine and 0.05 mg/kg/h esketamine) until one hour before the expected end of surgery. Postoperative patient-controlled analgesia will be established with a 100 mL mixture (containing 1.0 μg/mL sufentanil, 1.25 μg/mL dexmedetomidine, and 0.25 mg/mL esketamine in normal saline), programmed to deliver 2-mL boluses with an 8-minute lockout interval and an 1-mL/h background infusion, and provided for 48 hours (at least 24 hours).
Другие имена:
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Экспериментальный: Dex-Esk + sham tDCS
Participants will receive dexmedetomidine-esketamine (Dex-Esk) combination and sham (placebo) transcranial direct current stimulation (tDCS).
|
Sham transcranial direct current stimulation (tDCS) will be administered using a battery-powered stimulator. The anode will be positioned over the left dorsolateral prefrontal cortex (DLPFC, F3) and the cathode over the right supraorbital region (Fp2). To ensure blinding, the device will deliver a initial 30-second ramp-up to 2.0 mA followed immediately by a 30-second ramp-down to 0 mA. The device remains "ON" for the remaining 19 minutes with no effective current output, mimicking the peripheral scalp sensation without delivering cortical modulation. Each participant will receive a total of three 20-minute sessions of sham tDCS. The first session will be provided at 40 minutes after extubation in the post-anesthesia care unit. Two other sessions will be provided on postoperative days 1 and 2 (between 10:00 and 12:00 am).
Другие имена:
Dexmedetomidine-esketamine combination (1 μg/mL dexmedetomidine and 0.5 mg/mL esketamine) will be administered after anesthesia induction, firstly as a loading dose at a rate of [0.4 x body weight (kg)] mL/h for 30 minutes (0.2 μg/kg dexmedetomidine and 0.1 mg/kg esketamine), followed by a maintenance infusion at a rate of [0.1 x body weight (kg)] mL/h (0.1 μg/kg/h dexmedetomidine and 0.05 mg/kg/h esketamine) until one hour before the expected end of surgery. Postoperative patient-controlled analgesia will be established with a 100 mL mixture (containing 1.0 μg/mL sufentanil, 1.25 μg/mL dexmedetomidine, and 0.25 mg/mL esketamine in normal saline), programmed to deliver 2-mL boluses with an 8-minute lockout interval and an 1-mL/h background infusion, and provided for 48 hours (at least 24 hours).
Другие имена:
|
|
Экспериментальный: Placebo + active tDCS
Participants will receive placebo (normal saline) and active transcranial direct current stimulation (tDCS).
|
Active transcranial direct current stimulation (tDCS) will be administered using a battery-powered stimulator. The anode will be positioned over the left dorsolateral prefrontal cortex (DLPFC, F3) and the cathode over the right supraorbital region (Fp2). The stimulation intensity will be set at 2.0 mA, featuring a 30-second linear ramp-up at the beginning and a 30-second ramp-down at the end of each session. Each participant will receive a total of three 20-minute sessions of active tDCS. The first session will be provided at 40 minutes after extubation in the post-anesthesia care unit. Two other sessions will be provided on postoperative days 1 and 2 (between 10:00 and 12:00 am).
Другие имена:
Placebo (normal saline) will be administered after anesthesia induction, firstly as a loading dose at a rate of [0.4 x body weight (kg)] mL/h for 30 minutes, followed by a maintenance infusion at a rate of [0.1 x body weight (kg)] mL/h until one hour before the expected end of surgery. Postoperative patient-controlled analgesia will be established with a 100 mL mixture (containing 1.0 μg/mL sufentanil in normal saline), programmed to deliver 2-mL boluses with an 8-minute lockout interval and an 1-mL/h background infusion, and provided for 48 hours (at least 24 hours).
Другие имена:
|
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Плацебо Компаратор: Placebo + sham tDCS
Participants will receive placebo (normal saline) and sham (placebo) transcranial direct current stimulation (tDCS).
|
Sham transcranial direct current stimulation (tDCS) will be administered using a battery-powered stimulator. The anode will be positioned over the left dorsolateral prefrontal cortex (DLPFC, F3) and the cathode over the right supraorbital region (Fp2). To ensure blinding, the device will deliver a initial 30-second ramp-up to 2.0 mA followed immediately by a 30-second ramp-down to 0 mA. The device remains "ON" for the remaining 19 minutes with no effective current output, mimicking the peripheral scalp sensation without delivering cortical modulation. Each participant will receive a total of three 20-minute sessions of sham tDCS. The first session will be provided at 40 minutes after extubation in the post-anesthesia care unit. Two other sessions will be provided on postoperative days 1 and 2 (between 10:00 and 12:00 am).
Другие имена:
Placebo (normal saline) will be administered after anesthesia induction, firstly as a loading dose at a rate of [0.4 x body weight (kg)] mL/h for 30 minutes, followed by a maintenance infusion at a rate of [0.1 x body weight (kg)] mL/h until one hour before the expected end of surgery. Postoperative patient-controlled analgesia will be established with a 100 mL mixture (containing 1.0 μg/mL sufentanil in normal saline), programmed to deliver 2-mL boluses with an 8-minute lockout interval and an 1-mL/h background infusion, and provided for 48 hours (at least 24 hours).
Другие имена:
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Что измеряет исследование?
Первичные показатели результатов
Мера результата |
Мера Описание |
Временное ограничение |
|---|---|---|
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Incidence of delayed neurocognitive recovery (dNCR)
Временное ограничение: At 5 days after surgery or before hospital discharge
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Cognitive function will be assessed at baseline and at 5 days after surgery (or before hospital discharge) using the Montreal Cognitive Assessment (MoCA; scores range from 0 to 30, with higher scores indicating better cognitive function). Delayed neurocognitive decline (dNCR) is defined as: a |Z| value of decline in MoCA score ≥1.96. Z value = [(change from baseline in MoCA score in a surgical patient - mean change from baseline in MoCA score in the non-surgical group)] / (standard deviation of change from baseline in MoCA score in the non-surgical group). |
At 5 days after surgery or before hospital discharge
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Вторичные показатели результатов
Мера результата |
Мера Описание |
Временное ограничение |
|---|---|---|
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Incidence of postoperative delirium
Временное ограничение: Up to 4 days after surgery
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Delirium will be assessed twice daily (8-10 am and 6-8 pm) using the 3-Dimensional Confusion Assessment Method (3D-CAM) for patients without intubation or the Confusion Assessment Method for the Intensive Care Unit (CAM-ICU) for patients with intubation.
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Up to 4 days after surgery
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Incidence of postoperative neurocognitive disorders (pNCD)
Временное ограничение: At 30 days after surgery
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Cognitive function will be assessed at baseline and at 30 days after surgery using the Montreal Cognitive Assessment (MoCA; scores range from 0 to 30, with higher scores indicating better cognitive function). Postoperative neurocognitive disorders (pNCD) is defined as: a |Z| value of decline in MoCA score ≥1.96. Z value = [(change from baseline in MoCA score in a surgical patient - mean change from baseline in MoCA score in the non-surgical group)] / (standard deviation of change from baseline in MoCA score in the non-surgical group). |
At 30 days after surgery
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Другие показатели результатов
Мера результата |
Мера Описание |
Временное ограничение |
|---|---|---|
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Early postoperative pain intensity
Временное ограничение: Up to 4 days after surgery
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Pain intensity will be assessed twice daily (8-10 am and 6-8 pm) both at rest and with movement (coughing or turning over) using an 11-point Numeric Rating Scale (NRS; scores range from 0 to 10 where 0=no pain and 10=the worst pain). Pain intensity early after surgery will be summarized as the area under the curve (AUC) using the trapezoidal method. |
Up to 4 days after surgery
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Length of hospital stay (LOS) after surgery
Временное ограничение: Up to 30 days after surgery
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From the day of surgery until the day of hospital discharge.
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Up to 30 days after surgery
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Incidence of postoperative complications within 30 days
Временное ограничение: Up to 30 days after surgery
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Postoperative complications are defined as new-onset conditions that are deemed harmful and required therapeutic intervention, i.e., grade II or above on the Clavien-Dindo classification.
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Up to 30 days after surgery
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Subjective sleep quality at 30 days after surgery
Временное ограничение: At 30 days after surgery
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Subjective sleep quality at 30 days will be assessed using the Pittsburgh Sleep Quality Index (PSQI; scores range from 0 to 21, with higher scores indicating poorer sleep quality).
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At 30 days after surgery
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Early postoperative subjective sleep quality
Временное ограничение: Up to 4 nights after surgery
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Subjective sleep quality will be assessed once daily (8-10 am) using an 11-point Numeric Rating Scale (NRS; scores range from 0 to 10 where 0=the best sleep and 10=the worst sleep. Subjective sleep quality early after surgery will be summarized as the cumulative score of subjective sleep quality during the first 4 postoperative nights. |
Up to 4 nights after surgery
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Соавторы и исследователи
Спонсор
Соавторы
Следователи
- Главный следователь: Dong-Xin Wang, MD, PhD, Peking University First Hospital
Публикации и полезные ссылки
Общие публикации
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Даты записи исследования
Изучение основных дат
Начало исследования (Оцененный)
Первичное завершение (Оцененный)
Завершение исследования (Оцененный)
Даты регистрации исследования
Первый отправленный
Впервые представлено, что соответствует критериям контроля качества
Первый опубликованный (Действительный)
Обновления учебных записей
Последнее опубликованное обновление (Действительный)
Последнее отправленное обновление, отвечающее критериям контроля качества
Последняя проверка
Дополнительная информация
Термины, связанные с этим исследованием
Ключевые слова
Дополнительные соответствующие термины MeSH
Другие идентификационные номера исследования
- 2026-1219
- 82293644 (Другой номер гранта/финансирования: National Natural Science Foundation of China)
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Информация о лекарствах и устройствах, исследовательские документы
Изучает лекарственный продукт, регулируемый FDA США.
Изучает продукт устройства, регулируемый Управлением по санитарному надзору за качеством пищевых продуктов и медикаментов США.
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