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Exploration of Appropriate BIS Range and Propofol Effect-site Concentration During Total Intravenous Anesthesia With Concomitant Adjuvants.

26. července 2026 aktualizováno: Ma Ye, China-Japan Friendship Hospital

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:

  1. 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?
  2. How these combination regimens affect the quality of recovery and postoperative pain in patients？

Participants will:

  1. Receive one of four anesthesia regimens during surgery: propofol alone, propofol combined with midazolam, dexmedetomidine, or esketamine.
  2. Undergo a stepwise reduction of propofol effect-site concentration towards the end of surgery.
  3. Have their consciousness assessed using the isolated forearm technique, while BIS, EEG signals, and vital signs are continuously monitored throughout the procedure.
  4. Have their recovery quality and postoperative pain assessed after surgery.

Přehled studie

Postavení

Zatím nenabíráme

Podmínky

Intervence / Léčba

Typ studie

Intervenční

Zápis (Odhadovaný)

100

Fáze

  • Nelze použít

Kontakty a umístění

Tato část poskytuje kontaktní údaje pro ty, kteří studii provádějí, a informace o tom, kde se tato studie provádí.

Studijní kontakt

Kritéria účasti

Výzkumníci hledají lidi, kteří odpovídají určitému popisu, kterému se říká kritéria způsobilosti. Některé příklady těchto kritérií jsou celkový zdravotní stav osoby nebo předchozí léčba.

Kritéria způsobilosti

Věk způsobilý ke studiu

  • Dospělý
  • Starší dospělý

Přijímá zdravé dobrovolníky

Ne

Popis

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

Studijní plán

Tato část poskytuje podrobnosti o studijním plánu, včetně toho, jak je studie navržena a co studie měří.

Jak je studie koncipována?

Detaily designu

  • Primární účel: Prevence
  • Přidělení: Randomizované
  • Intervenční model: Paralelní přiřazení
  • Maskování: Singl

Zbraně a zásahy

Skupina účastníků / Arm
Intervence / Léčba
Falešný srovnávač: Propofol + Remifentanil
Lék: 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.
Experimentální: Propofol + Remifentanil + Midazolam
Lék: 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.
Experimentální: Propofol + Remifentanil + Dexmedetomidine
Lék: 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.
Experimentální: Propofol + Remifentanil + Esketamine
Lék: 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.

Co je měření studie?

Primární výstupní opatření

Měření výsledku
Popis opatření
Časové okno
BIS value
Časové okno: 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
Časové okno: 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.

Sekundární výstupní opatření

Měření výsledku
Popis opatření
Časové okno
Modified Brice Questionnaire
Časové okno: 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
Časové okno: 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
Časové okno: 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
Časové okno: 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
Časové okno: 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
Časové okno: 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.

Spolupracovníci a vyšetřovatelé

Zde najdete lidi a organizace zapojené do této studie.

Sponzor

China-Japan Friendship Hospital

Termíny studijních záznamů

Tato data sledují průběh záznamů studie a předkládání souhrnných výsledků na ClinicalTrials.gov. Záznamy ze studií a hlášené výsledky jsou před zveřejněním na veřejné webové stránce přezkoumány Národní lékařskou knihovnou (NLM), aby se ujistily, že splňují specifické standardy kontroly kvality.

Hlavní termíny studia

Začátek studia (Odhadovaný)

1. srpna 2026

Primární dokončení (Odhadovaný)

31. ledna 2027

Dokončení studie (Odhadovaný)

31. července 2027

Termíny zápisu do studia

První předloženo

16. července 2026

První předloženo, které splnilo kritéria kontroly kvality

26. července 2026

První zveřejněno (Aktuální)

30. července 2026

Aktualizace studijních záznamů

Poslední zveřejněná aktualizace (Aktuální)

30. července 2026

Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality

26. července 2026

Naposledy ověřeno

1. července 2026

Více informací

Termíny související s touto studií

Další relevantní podmínky MeSH

Další identifikační čísla studie

  • 2026-HX-39

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Plánujete sdílet data jednotlivých účastníků (IPD)?

NE

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