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

26 lipca 2026 zaktualizowane przez: 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.

Przegląd badań

Status

Jeszcze nie rekrutacja

Warunki

Interwencja / Leczenie

Typ studiów

Interwencyjne

Zapisy (Szacowany)

100

Faza

  • Nie dotyczy

Kontakty i lokalizacje

Ta sekcja zawiera dane kontaktowe osób prowadzących badanie oraz informacje o tym, gdzie badanie jest przeprowadzane.

Kontakt w sprawie studiów

Kryteria uczestnictwa

Badacze szukają osób, które pasują do określonego opisu, zwanego kryteriami kwalifikacyjnymi. Niektóre przykłady tych kryteriów to ogólny stan zdrowia danej osoby lub wcześniejsze leczenie.

Kryteria kwalifikacji

Wiek uprawniający do nauki

  • Dorosły
  • Starszy dorosły

Akceptuje zdrowych ochotników

Nie

Opis

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

Plan studiów

Ta sekcja zawiera szczegółowe informacje na temat planu badania, w tym sposób zaprojektowania badania i jego pomiary.

Jak projektuje się badanie?

Szczegóły projektu

  • Główny cel: Zapobieganie
  • Przydział: Randomizowane
  • Model interwencyjny: Przydział równoległy
  • Maskowanie: Pojedynczy

Broń i interwencje

Grupa uczestników / Arm
Interwencja / Leczenie
Pozorny 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.
Eksperymentalny: 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.
Eksperymentalny: 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.
Eksperymentalny: 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 mierzy badanie?

Podstawowe miary wyniku

Miara wyniku
Opis środka
Ramy czasowe
BIS value
Ramy czasowe: 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
Ramy czasowe: 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.

Miary wyników drugorzędnych

Miara wyniku
Opis środka
Ramy czasowe
Modified Brice Questionnaire
Ramy czasowe: 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
Ramy czasowe: 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
Ramy czasowe: 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
Ramy czasowe: 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
Ramy czasowe: 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
Ramy czasowe: 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.

Współpracownicy i badacze

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Sponsor

Daty zapisu na studia

Daty te śledzą postęp w przesyłaniu rekordów badań i podsumowań wyników do ClinicalTrials.gov. Zapisy badań i zgłoszone wyniki są przeglądane przez National Library of Medicine (NLM), aby upewnić się, że spełniają określone standardy kontroli jakości, zanim zostaną opublikowane na publicznej stronie internetowej.

Główne daty studiów

Rozpoczęcie studiów (Szacowany)

1 sierpnia 2026

Zakończenie podstawowe (Szacowany)

31 stycznia 2027

Ukończenie studiów (Szacowany)

31 lipca 2027

Daty rejestracji na studia

Pierwszy przesłany

16 lipca 2026

Pierwszy przesłany, który spełnia kryteria kontroli jakości

26 lipca 2026

Pierwszy wysłany (Rzeczywisty)

30 lipca 2026

Aktualizacje rekordów badań

Ostatnia wysłana aktualizacja (Rzeczywisty)

30 lipca 2026

Ostatnia przesłana aktualizacja, która spełniała kryteria kontroli jakości

26 lipca 2026

Ostatnia weryfikacja

1 lipca 2026

Więcej informacji

Terminy związane z tym badaniem

Inne numery identyfikacyjne badania

  • 2026-HX-39

Plan dla danych uczestnika indywidualnego (IPD)

Planujesz udostępniać dane poszczególnych uczestników (IPD)?

NIE

Informacje o lekach i urządzeniach, dokumenty badawcze

Bada produkt leczniczy regulowany przez amerykańską FDA

Nie

Bada produkt urządzenia regulowany przez amerykańską FDA

Nie

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