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Effect of Intravenous Lidocaine on BIS-guided Propofol Requirements During General Anesthesia

This study has been completed.
Sponsor:
ClinicalTrials.gov Identifier:
NCT01366300
First Posted: June 6, 2011
Last Update Posted: June 6, 2011
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Information provided by:
Pontificia Universidad Catolica de Chile
  Purpose
The purpose of this randomized clinical trial is to evaluate the interaction of lidocaine infusion initiated and maintained during surgery, on propofol requirements during general anesthesia.

Condition Intervention Phase
Intravenous Anesthetic Interaction "Unrecognized Condition" Drug: Intravenous lidocaine infusion Other: Placebo (0.9% saline infusion) Drug: Propofol 1% (intravenous infusion) Procedure: Placement of arterial line Phase 4

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Triple (Participant, Care Provider, Outcomes Assessor)
Primary Purpose: Supportive Care
Official Title: Estimation of the Effect of Intravenous Lidocaine on BIS-guided Propofol Requirements During General Anesthesia

Resource links provided by NLM:


Further study details as provided by Pontificia Universidad Catolica de Chile:

Primary Outcome Measures:
  • Total propofol requirements during bispectral index guided general anesthesia [ Time Frame: DAY 1. ]
    During and after elective laparoscopic cholecystectomy. Patients' anesthetic depth will be monitored during the intra-operative period using a BIS monitor. Patients' follow up considers the immediate post-operative period at the recovery room (PACU), and it will continue until patients' discharge from the hospital (average 3 days postoperatively).


Secondary Outcome Measures:
  • Evaluate effect of intravenous lidocaine infusion on waking time after general anesthesia [ Time Frame: DAY 1. ]
    Immediately after elective laparoscopic cholecystectomy, during PACU stay. Patients' follow up considers the immediate post-operative period at the recovery room (PACU), and it will continue until patients' discharge from the hospital (average 3 days postoperatively).


Estimated Enrollment: 40
Study Start Date: June 2010
Study Completion Date: June 2011
Primary Completion Date: June 2011 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: Intravenous lidocaine infusion
Intravenous lidocaine infusion during total intravenous anesthesia with propofol administered by target controlled infusion
Drug: Intravenous lidocaine infusion
Once the dose of propofol required for general anesthesia is stabilized for 5 minutes with BIS values between 40 and 50, lidocaine 1% infusion is begun in a bolus of 1.5mg/kg for 5 minutes and then infused at 2 mg/kg/hr until the end of surgery (last skin suture is made).
Drug: Propofol 1% (intravenous infusion)
Propofol is administered according to a widely-accepted pharmacokinetic model, initially dosed to a target controlled infusion (TCI) of 4.5 micrograms/ml, and titrated by step increases of 0.5 every minute until loss of conscience is obtained and BIS values are less than 50. During the maintenance phase of anesthesia propofol TCI is actively titrated to maintain BIS values between 40 and 50. If BIS is out of this range for more than 10 seconds, propofol is adjusted in 0.5 ug/mc to maintain BIS values in the predetermined limits.
Procedure: Placement of arterial line
An arterial line was placed in the anesthetised patient´s right arm by the investigator and arterial samples were obtained every 10 minutes since initiation of the study infusion to determine plasmatic lidocaine and propofol levels (if the infusion was saline the samples were not analyzed). The arterial line was removed before the end of surgery.
Placebo Comparator: Intravenous 0.9% saline infusion
Intravenous 0.9% saline infusion during total intravenous anesthesia with propofol administered by target controlled infusion
Other: Placebo (0.9% saline infusion)
Once the dose of propofol required for general anesthesia is stabilized for 5 minutes with BIS values between 40 and 50, 0.9% saline infusion is begun in a bolus of 1.5mg/kg for 5 minutes and then infused at 2 mg/kg/hr until the end of surgery (last skin suture is made).
Drug: Propofol 1% (intravenous infusion)
Propofol is administered according to a widely-accepted pharmacokinetic model, initially dosed to a target controlled infusion (TCI) of 4.5 micrograms/ml, and titrated by step increases of 0.5 every minute until loss of conscience is obtained and BIS values are less than 50. During the maintenance phase of anesthesia propofol TCI is actively titrated to maintain BIS values between 40 and 50. If BIS is out of this range for more than 10 seconds, propofol is adjusted in 0.5 ug/mc to maintain BIS values in the predetermined limits.
Procedure: Placement of arterial line
An arterial line was placed in the anesthetised patient´s right arm by the investigator and arterial samples were obtained every 10 minutes since initiation of the study infusion to determine plasmatic lidocaine and propofol levels (if the infusion was saline the samples were not analyzed). The arterial line was removed before the end of surgery.

Detailed Description:
Use of intravenous lidocaine as a coadjuvant agent during general anesthesia has increased. Lidocaine infusion during and after abdominal surgery decreases postoperative pain and reduces ileus duration, reducing patient´s hospital stay and opioid consumption. Intravenous lidocaine´s effect on other intravenous anesthetics is unclear, and there are no present studies evaluating its interaction on hypnotic anesthetic requirements when using a BIS (Bispectral Index) monitor to maintain an adequate depth of anesthesia. We therefore decided to conduct a randomized controlled trial to evaluate the interaction of systemic lidocaine infusion, initiated and maintained during surgery, on propofol requirements and anesthetic depth as measured by BIS.
  Eligibility

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Ages Eligible for Study:   20 Years to 65 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • ASA I-II patients,
  • Between 20 and 65 years of age
  • Programed for elective laparoscopic cholecystectomy
  • Eligible for total intravenous anesthesia with propofol

Exclusion Criteria:

  • Unwillingness to participate in the study
  • Adverse reactions to the drugs used in the study
  • Use of medications that interfere in local anesthetic metabolism
  • History of liver disease, kidney failure, hypoalbuminemia, hypocalcemia or hypophosphatemia
  • History of drug or alcohol abuse
  • Chronic use of benzodiazepines
  Contacts and Locations
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01366300


Locations
Chile
Hospital Clínico Pontificia Universidad Católica de Chile
Santiago, RM, Chile, 8330024
Sponsors and Collaborators
Pontificia Universidad Catolica de Chile
Investigators
Principal Investigator: Fernando R Altermatt, MD Departamento de Anestesiología, Hospital Clínico Pontificia Universidad Católica de Chile
  More Information

Responsible Party: Fernando Altermatt, Pontificia Universidad Católica de Chile - Departamento de Anestesiología
ClinicalTrials.gov Identifier: NCT01366300     History of Changes
Other Study ID Numbers: LPBIS-UC-2010
First Submitted: June 2, 2011
First Posted: June 6, 2011
Last Update Posted: June 6, 2011
Last Verified: March 2011

Additional relevant MeSH terms:
Anesthetics
Lidocaine
Propofol
Central Nervous System Depressants
Physiological Effects of Drugs
Anesthetics, Local
Sensory System Agents
Peripheral Nervous System Agents
Anti-Arrhythmia Agents
Voltage-Gated Sodium Channel Blockers
Sodium Channel Blockers
Membrane Transport Modulators
Molecular Mechanisms of Pharmacological Action
Hypnotics and Sedatives
Anesthetics, Intravenous
Anesthetics, General