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.
Descripción general del estudio
Estado
Estado
Condiciones
Condiciones
Intervención / Tratamiento
Intervención / Tratamiento
Tipo de estudio
Tipo de estudio
Inscripción (Estimado)
Inscripción
Fase
Fase
- No aplica
Contactos y Ubicaciones
Estudio Contacto
Estudio Contacto
- Nombre: MA
- Número de teléfono: +86-10-84205882
- Correo electrónico: maye_1316@163.com
Criterios de participación
Criterio de elegibilidad
Criterio de elegibilidad
Edades elegibles para estudiar
- Adulto
- Adulto Mayor
Acepta Voluntarios Saludables
Descripción
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 de estudios
¿Cómo está diseñado el estudio?
Detalles de diseño
- Propósito principal: Prevención
- Asignación: Aleatorizado
- Modelo Intervencionista: Asignación paralela
- Enmascaramiento: Único
Número de brazos
Armas e Intervenciones
Grupo de participantes/brazoGrupo de participantes/brazo |
Intervención / TratamientoIntervención / Tratamiento |
|---|---|
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Comparador falso: 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.
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Experimental: Propofol + Remifentanil + Midazolam
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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.
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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.
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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.
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¿Qué mide el estudio?
Medidas de resultado primarias
Medidas de resultado primarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
|---|---|---|
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BIS value
Periodo de tiempo: 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.
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BIS value recorded at the first occurrence of IFT positivity or any predefined clinical sign of inadequate anesthesia.
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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.
|
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Propofol Effect-Site Concentration
Periodo de tiempo: 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.
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Propofol effect-site concentration recorded at the first occurrence of IFT positivity or any predefined clinical sign of inadequate anesthesia.
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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.
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Medidas de resultado secundarias
Medidas de resultado secundarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
|---|---|---|
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Modified Brice Questionnaire
Periodo de tiempo: 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.
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From PACU admission to 48 hours postoperatively. Assessed before PACU discharge, 24 hours and 48 hours postoperatively.
|
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Time from Discontinuation of Anesthetics to Laryngeal Mask Airway Removal
Periodo de tiempo: 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.
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From discontinuation of anesthetics to LMA removal, assessed up to 60 minutes.
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Time to Modified Aldrete Score of 10 in the Post Anesthesia Care Unit
Periodo de tiempo: From PACU admission to Modified Aldrete Score of 10, assessed up to 60 minutes.
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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.
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From PACU admission to Modified Aldrete Score of 10, assessed up to 60 minutes.
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Adverse Events During Emergence from Anesthesia
Periodo de tiempo: 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.
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From discontinuation of anesthetics to PACU discharge, assessed up to 2 hours.
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Postoperative Pain Intensity Measured by Numeric Rating Scale
Periodo de tiempo: 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.
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From PACU admission to 48 hours postoperatively. Assessed at PACU admission, PACU discharge, 24 hours and 48 hours postoperatively.
|
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Analgesic Consumption
Periodo de tiempo: 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.
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Colaboradores e Investigadores
Patrocinador
Patrocinador
Fechas de registro del estudio
Fechas importantes del estudio
Inicio del estudio (Estimado)
Inicio del estudio
Finalización primaria (Estimado)
Finalización primaria
Finalización del estudio (Estimado)
Finalización del estudio
Fechas de registro del estudio
Enviado por primera vez
Enviado por primera vez
Primero enviado que cumplió con los criterios de control de calidad
Primero enviado que cumplió con los criterios de control de calidad
Publicado por primera vez (Actual)
Publicado por primera vez
Actualizaciones de registros de estudio
Última actualización publicada (Actual)
Última actualización publicada
Última actualización enviada que cumplió con los criterios de control de calidad
Última actualización enviada que cumplió con los criterios de control de calidad
Última verificación
Última verificación
Más información
Términos relacionados con este estudio
Términos MeSH relevantes adicionales
- Enfermedades musculoesqueléticas
- Artritis
- Enfermedades Articulares
- Enfermedades reumáticas
- Osteoartritis
- Artrosis, Rodilla
- Químicos orgánicos
- Compuestos heterocíclicos, 1 anillo
- Compuestos heterocíclicos
- Azoles
- Hidrocarburos
- Hidrocarburos, cíclico
- Ácidos, acíclico
- Ácidos carboxílicos
- Hidrocarburos, aromáticos
- Imidazoles
- Piperidinas
- Fenoles
- Derivados de benceno
- Propionios
- Remifentanilo
- Esketamina
- Dexmedetomidina
- Propofol
Otros números de identificación del estudio
Otros números de identificación del estudio
- 2026-HX-39
Plan de datos de participantes individuales (IPD)
¿Planea compartir datos de participantes individuales (IPD)?
Información sobre medicamentos y dispositivos, documentos del estudio
Estudia un producto farmacéutico regulado por la FDA de EE. UU.
Estudia un producto de dispositivo regulado por la FDA de EE. UU.
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