Exploration of Appropriate BIS Range and Propofol Effect-site Concentration During Total Intravenous Anesthesia With Concomitant Adjuvants.
A Prospective, Randomized Study to Determine the Appropriate Bispectral Index Range and Propofol Effect-Site Concentration During Total Intravenous Anesthesia Combined With Midazolam, Dexmedetomidine or Esketamine.
The goal of this clinical trial is to determine the appropriate Bispectral Index (BIS) range and propofol effect-site concentration required to maintain adequate anesthesia depth during total intravenous anesthesia (TIVA) combined with midazolam, dexmedetomidine, or esketamine in patients undergoing unilateral knee replacement surgery. The main questions it aims to answer are:
- What are the appropriate BIS range and propofol effect-site concentration for maintaining adequate anesthesia depth when combined with each of the three medications (midazolam, dexmedetomidine, or esketamine) during TIVA?
- How these combination regimens affect the quality of recovery and postoperative pain in patients?
Participants will:
- Receive one of four anesthesia regimens during surgery: propofol alone, propofol combined with midazolam, dexmedetomidine, or esketamine.
- Undergo a stepwise reduction of propofol effect-site concentration towards the end of surgery.
- Have their consciousness assessed using the isolated forearm technique, while BIS, EEG signals, and vital signs are continuously monitored throughout the procedure.
- Have their recovery quality and postoperative pain assessed after surgery.
調査の概要
状態
状態
条件
条件
介入・治療
介入・治療
研究の種類
研究の種類
入学 (推定)
入学
段階
段階
- 適用できない
連絡先と場所
研究連絡先
研究連絡先
- 名前:MA
- 電話番号:+86-10-84205882
- メール:maye_1316@163.com
参加基準
適格基準
適格基準
就学可能な年齢
- 大人
- 高齢者
健康ボランティアの受け入れ
説明
Inclusion Criteria:
- Age 18 to 65 years
- American Society of Anesthesiologists (ASA) physical status I or II
- Body Mass Index (BMI) 18 to 30 kg/m²
- Scheduled for elective unilateral total knee replacement surgery
- Willing to participate in the study and signed informed consent form, and able to comply with the intervention and assessment procedures
Exclusion Criteria:
- History of neurological disorders
- Cognitive dysfunction assessed by the Mini-Cog scale
- History of antipsychotic or sedative medication use in the past 4 weeks
- Poorly controlled or untreated hypertension
- Sinus bradycardia, cardiac conduction block, or severe heart failure
- Acute angle-closure glaucoma
- Allergic to intravenous anesthetics
- Hearing impairment, could not cooperate in intervention and evaluation
- Contraindications to tourniquet use on the upper arm
研究計画
研究はどのように設計されていますか?
デザインの詳細
- 主な目的:防止
- 割り当て:ランダム化
- 介入モデル:並列代入
- マスキング:独身
アーム数
武器と介入
参加者グループ / アーム参加者グループ / アーム |
介入・治療介入・治療 |
|---|---|
|
偽コンパレータ:Propofol + Remifentanil
|
Participants in this arm will receive total intravenous anesthesia (TIVA) with propofol and remifentanil during the maintenance period.
After placement of the knee prosthesis, the isolated forearm technique (IFT) will be initiated.
Participants will wear headphones playing recorded standardized instructions.
Rocuronium (0.3 mg/kg) will be administered via the non-dominant arm.
The propofol plasma-site concentration will be reduced in stepwise decrements of 0.3 μg/mL, with each concentration maintained for 5 minutes, until any of the following endpoints is reached: (1) positive IFT response , (2) BIS > 60 sustained for 1 minute, (3) electroencephalogram signs of arousal, or (4) clinical judgment by the anesthesiologist that anesthesia depth is inadequate.
|
|
実験的:Propofol + Remifentanil + Midazolam
|
Participants in this arm will receive total intravenous anesthesia (TIVA) with propofol and remifentanil during the maintenance period.
After placement of the knee prosthesis, the isolated forearm technique (IFT) will be initiated.
Participants will wear headphones playing recorded standardized instructions.
Rocuronium (0.3 mg/kg) will be administered via the non-dominant arm.
Midazolam (2 mg) will be administered intravenously.The propofol plasma-site concentration will be set to 1.8 μg/mL, then reduced in stepwise decrements of 0.3 μg/mL, with each concentration maintained for 5 minutes, until any of the following endpoints is reached: (1) positive IFT response , (2) BIS > 60 sustained for 1 minute, (3) electroencephalogram signs of arousal, or (4) clinical judgment by the anesthesiologist that anesthesia depth is inadequate.
|
|
実験的:Propofol + Remifentanil + Dexmedetomidine
|
Participants in this arm will receive total intravenous anesthesia (TIVA) with propofol and remifentanil during the maintenance period.
After placement of the knee prosthesis, the isolated forearm technique (IFT) will be initiated.
Participants will wear headphones playing recorded standardized instructions.
Rocuronium (0.3 mg/kg) will be administered via the non-dominant arm.
Dexmedetomidine 1 μg/kg infused over 10 minutes.The propofol plasma-site concentration will be set to 1.8 μg/mL, then reduced in stepwise decrements of 0.3 μg/mL, with each concentration maintained for 5 minutes, until any of the following endpoints is reached: (1) positive IFT response , (2) BIS > 60 sustained for 1 minute, (3) electroencephalogram signs of arousal, or (4) clinical judgment by the anesthesiologist that anesthesia depth is inadequate.
|
|
実験的:Propofol + Remifentanil + Esketamine
|
Participants in this arm will receive total intravenous anesthesia (TIVA) with propofol and remifentanil during the maintenance period.
After placement of the knee prosthesis, the isolated forearm technique (IFT) will be initiated.
Participants will wear headphones playing recorded standardized instructions.
Rocuronium (0.3 mg/kg) will be administered via the non-dominant arm.
Esketamine (0.3 mg/kg) will be administered intravenously.The propofol plasma-site concentration will be set to 1.8 μg/mL, then reduced in stepwise decrements of 0.3 μg/mL, with each concentration maintained for 5 minutes, until any of the following endpoints is reached: (1) positive IFT response , (2) BIS > 75 sustained for 1 minute, (3) electroencephalogram signs of arousal, or (4) clinical judgment by the anesthesiologist that anesthesia depth is inadequate.
|
この研究は何を測定していますか?
主要な結果の測定
主要な結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
|
BIS value
時間枠:From the start of the intra-operative stepwise reduction phase until the first occurrence of IFT positivity or any predefined clinical sign of inadequate anesthesia, assessed up to 30 minutes.
|
BIS value recorded at the first occurrence of IFT positivity or any predefined clinical sign of inadequate anesthesia.
|
From the start of the intra-operative stepwise reduction phase until the first occurrence of IFT positivity or any predefined clinical sign of inadequate anesthesia, assessed up to 30 minutes.
|
|
Propofol Effect-Site Concentration
時間枠:From the start of the intra-operative stepwise reduction phase until the first occurrence of IFT positivity or any predefined clinical sign of inadequate anesthesia, assessed up to 30 minutes.
|
Propofol effect-site concentration recorded at the first occurrence of IFT positivity or any predefined clinical sign of inadequate anesthesia.
|
From the start of the intra-operative stepwise reduction phase until the first occurrence of IFT positivity or any predefined clinical sign of inadequate anesthesia, assessed up to 30 minutes.
|
二次結果の測定
二次結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
|
Modified Brice Questionnaire
時間枠:From PACU admission to 48 hours postoperatively. Assessed before PACU discharge, 24 hours and 48 hours postoperatively.
|
The presence of intra-operative awareness with recall is assessed using the Modified Brice Questionnaire.
The questionnaire explores the patient's memory of the peri-operative period through structured questions.
|
From PACU admission to 48 hours postoperatively. Assessed before PACU discharge, 24 hours and 48 hours postoperatively.
|
|
Time from Discontinuation of Anesthetics to Laryngeal Mask Airway Removal
時間枠:From discontinuation of anesthetics to LMA removal, assessed up to 60 minutes.
|
From discontinuation of anesthetics to LMA removal.
Successful removal is defined as the patient being awake, able to open mouth on command, and having return of protective reflexes, without signs of respiratory distress.
|
From discontinuation of anesthetics to LMA removal, assessed up to 60 minutes.
|
|
Time to Modified Aldrete Score of 10 in the Post Anesthesia Care Unit
時間枠:From PACU admission to Modified Aldrete Score of 10, assessed up to 60 minutes.
|
Time from post anesthesia care unit (PACU) admission until the first attainment of a Modified Aldrete Score of 10.
The Modified Aldrete Score assesses five domains: consciousness, activity, respiration, blood pressure, and oxygen saturation, each scored from 0 to 2, with a maximum total score of 10.
A score of 10 indicates the patient has achieved optimal recovery in all five domains.
|
From PACU admission to Modified Aldrete Score of 10, assessed up to 60 minutes.
|
|
Adverse Events During Emergence from Anesthesia
時間枠:From discontinuation of anesthetics to PACU discharge, assessed up to 2 hours.
|
Adverse events during the period from anesthetic discontinuation to PACU discharge are recorded.
|
From discontinuation of anesthetics to PACU discharge, assessed up to 2 hours.
|
|
Postoperative Pain Intensity Measured by Numeric Rating Scale
時間枠:From PACU admission to 48 hours postoperatively. Assessed at PACU admission, PACU discharge, 24 hours and 48 hours postoperatively.
|
Pain intensity is assessed using the Numeric Rating Scale, an 11-point scale from 0 to 10, where 0 represents "no pain" and 10 represents "the worst imaginable pain".
Patients are asked to rate their current pain intensity at each assessment time point.
The Numeric Rating Scale is a widely used and validated measure for postoperative pain assessment.
|
From PACU admission to 48 hours postoperatively. Assessed at PACU admission, PACU discharge, 24 hours and 48 hours postoperatively.
|
|
Analgesic Consumption
時間枠:From PACU admission to 48 hours postoperatively. Recorded during PACU stay, 24 hours and 48 hours postoperatively.
|
Total amount of rescue analgesic medication administered to the patient from PACU admission to 48 hours postoperatively.
|
From PACU admission to 48 hours postoperatively. Recorded during PACU stay, 24 hours and 48 hours postoperatively.
|
協力者と研究者
研究記録日
主要日程の研究
研究開始 (推定)
研究開始
一次修了 (推定)
一次修了
研究の完了 (推定)
研究の完了
試験登録日
最初に提出
最初に提出
QC基準を満たした最初の提出物
QC基準を満たした最初の提出物
最初の投稿 (実際)
最初の投稿
学習記録の更新
投稿された最後の更新 (実際)
投稿された最後の更新
QC基準を満たした最後の更新が送信されました
QC基準を満たした最後の更新が送信されました
最終確認日
最終確認日
詳しくは
本研究に関する用語
追加の関連 MeSH 用語
その他の研究ID番号
その他の研究ID番号
- 2026-HX-39
個々の参加者データ (IPD) の計画
個々の参加者データ (IPD) を共有する予定はありますか?
医薬品およびデバイス情報、研究文書
米国FDA規制医薬品の研究
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