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.
Studienübersicht
Status
Status
Bedingungen
Bedingungen
Intervention / Behandlung
Intervention / Behandlung
Studientyp
Studientyp
Einschreibung (Geschätzt)
Einschreibung
Phase
Phase
- Unzutreffend
Kontakte und Standorte
Studienkontakt
Studienkontakt
- Name: MA
- Telefonnummer: +86-10-84205882
- E-Mail: maye_1316@163.com
Teilnahmekriterien
Zulassungskriterien
Zulassungskriterien
Studienberechtigtes Alter
- Erwachsene
- Älterer Erwachsener
Akzeptiert gesunde Freiwillige
Beschreibung
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
Studienplan
Wie ist die Studie aufgebaut?
Designdetails
- Hauptzweck: Verhütung
- Zuteilung: Zufällig
- Interventionsmodell: Parallele Zuordnung
- Maskierung: Single
Anzahl der Arme
Waffen und Interventionen
Teilnehmergruppe / ArmTeilnehmergruppe / Arm |
Intervention / BehandlungIntervention / Behandlung |
|---|---|
|
Schein-Komparator: 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.
|
|
Experimental: 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.
|
|
Experimental: 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.
|
|
Experimental: 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.
|
Was misst die Studie?
Primäre Ergebnismessungen
Primäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
|
BIS value
Zeitfenster: 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
Zeitfenster: 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.
|
Sekundäre Ergebnismessungen
Sekundäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
|
Modified Brice Questionnaire
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: 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.
|
Mitarbeiter und Ermittler
Sponsor
Sponsor
Studienaufzeichnungsdaten
Haupttermine studieren
Studienbeginn (Geschätzt)
Studienbeginn
Primärer Abschluss (Geschätzt)
Primärer Abschluss
Studienabschluss (Geschätzt)
Studienabschluss
Studienanmeldedaten
Zuerst eingereicht
Zuerst eingereicht
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst gepostet (Tatsächlich)
Zuerst gepostet
Studienaufzeichnungsaktualisierungen
Letztes Update gepostet (Tatsächlich)
Letztes Update gepostet
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Zuletzt verifiziert
Zuletzt verifiziert
Mehr Informationen
Begriffe im Zusammenhang mit dieser Studie
Zusätzliche relevante MeSH-Bedingungen
- Erkrankungen des Bewegungsapparates
- Arthritis
- Gelenkerkrankungen
- Rheumatische Erkrankungen
- Arthrose
- Arthrose, Knie
- Organische Chemikalien
- Heterocyclische Verbindungen, 1-Ring
- Heterocyclische Verbindungen
- Azolen
- Kohlenwasserstoffe
- Kohlenwasserstoffe, zyklisch
- Säuren, acyclisch
- Carboxylsäuren
- Kohlenwasserstoffe, aromatisch
- Imidazoles
- Piperidine
- Phenole
- Benzolderivate
- Propionate
- Remifentanil
- Esketamin
- Dexmedetomidin
- Propofol
Andere Studien-ID-Nummern
Andere Studien-ID-Nummern
- 2026-HX-39
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