Median Effective Dose of Dexmedetomidine in Elective Upper Limb Lidocaine Intravenous Regional Anesthesia (dexdix)

March 7, 2020 updated by: Ossama Hamdy Salman, South Valley University

A Prospective, Double Masked, up and Down Sequential Method to Estimate the Median Effective Dose of Dexmedetomidine in Elective Upper Limb Lidocaine Intravenous Regional Anesthesia

Auxiliary drugs augment the effect of local anesthetic in intravenous regional anesthesia (IVRA). The purpose of our study was to estimate the median effective dose (ED50) of Dexmedetomidine in elective upper limb Lidocaine 0.5% IVRA.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

Since its innovation in 1908 by Dr August Bier of Germany, Intravenous regional anesthesia (IVRA) has stood the test of time as simple, safe and effective technique of regional anesthesia. 1 The technique entails insertion of intravenous catheter into a surgical limb before isolating it from the general circulation by tourniquet then inject local anesthetic (LA) into this isolated limb. 2 IVRA block is preferably used with short surgical procedures or maneuvers of the upper or lower extremity. Nevertheless, the technique has gained popularity for procedures of the upper extremity because of tourniquet issues like tourniquet pain, and other safety concerns that arise more often with lower extremity IVRA, essentially leakage of the of LA.3 Unfortunately, using LA solely for IVRA has not achieved optimum intraoperative analgesia or overcome the frequently reported tourniquet pain.4 A long list of adjuvants, to mention few: morphine, muscle relaxant and clonidine, have been used to augment LA action and ameliorate tourniquet pain. 5 Dexmedetomidine (DEX) a potent α 2 agonist that have unique analgesic, anxiolytic and sedative profile has been called upon as attractive adjunct in general as well as regional anesthesia with enticing results. Several studies have pursued DEX median effective dose (ED50) in different settings e.g., co induction agent with Propofol, in laryngeal muscle insertion and with local anesthetic to enhance the quality of spinal anesthesia. 6 However, DEX effective median dose ED50 with IVRA for upper limb has not been investigated elsewhere, so far. The up and down sequential method of Dixon and Mood is a common sequential design method used in anesthesia research to detect the ED50. It is a sequence of experiments performed under the assumption that "satisfactory response" is followed by decrease in test dose for the next patient in the series, and "non- satisfactory response" is followed by increase in test dose for the next patient in the series. 7 The purpose of this study is to estimate the median effective dose of Dexmedetomidine (DEX) with Lidocaine 0.5% IVRA in upper limb elective surgeries, using modified Dixon's up and down method.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
81

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 4

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Egypt
      • Qinā, Egypt
        • South Valley University

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years to 60 years (Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Aged between 18 and 60 years
  • American Society of Anesthesiologists physical status I or II
  • Undergoing minor upper limb orthopedic surgical procedures in the hand, wrist and forearms including: metacarpal fracture, tendon injury, and carpal tunnel release.

Exclusion Criteria:

  • Allergy to test drugs.
  • vascular disease.
  • contraindication to tourniquet applications.
  • difficulty to manipulate the surgical limb.
  • surgery expected to last more than an hour.
  • patient refusal

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Sequential Assignment
  • Masking: Quadruple

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: satisfactory
0.4 µg.kg of dexmedetomidine, with 0.1 µg.kg dose interval. If IVRA outcome was satisfactory, the dose went down for the next patient by 0.1 µg.kg. Vice versa, if the outcome was unsatisfactory, the dexmedetomidine dose was stepped up by 0.1 µg.kg for the following patient
Drug: Dexmedetomidine
Dexmedetomidine (DEX) a potent α 2 agonist that have unique analgesic, anxiolytic and sedative profile has been called upon as attractive adjunct in general as well as regional anesthesia with enticing results. Several studies have pursued DEX median effective dose (ED50) in different settings e.g., co induction agent with Propofol, in laryngeal muscle insertion and with local anesthetic to enhance the quality of spinal anesthesia
Other Names:
  • dixon's sequential method
Experimental: unsatisfactory
0.4 µg.kg of dexmedetomidine, with 0.1 µg.kg dose interval. If IVRA outcome was satisfactory, the dose went down for the next patient by 0.1 µg.kg. Vice versa, if the outcome was unsatisfactory, the dexmedetomidine dose was stepped up by 0.1 µg.kg for the following patient
Drug: Dexmedetomidine
Dexmedetomidine (DEX) a potent α 2 agonist that have unique analgesic, anxiolytic and sedative profile has been called upon as attractive adjunct in general as well as regional anesthesia with enticing results. Several studies have pursued DEX median effective dose (ED50) in different settings e.g., co induction agent with Propofol, in laryngeal muscle insertion and with local anesthetic to enhance the quality of spinal anesthesia
Other Names:
  • dixon's sequential method

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
1. Pain intensity measure
Time Frame: 8 hours
Patients reported pain intensity at baseline, every 5 minutes during the surgery and every hour for 6 hours after the surgery. Pain intensity scored 0-10 (0 being no pain at all, and 10 the worst pain ever).
8 hours

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Changes in mean blood pressure in mmHg
Time Frame: 8 h ours
mean blood pressure in mmHg was measured at baseline, every 5 minutes during the surgery and every hour for 6 hours after the surgery
8 h ours
changes in heart rate (beat per minute)
Time Frame: 8 hours
Changes in heart at baseline, every 5 minutes during the surgery and every hour for 6 hours after the surgery
8 hours

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
South Valley University

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Tanta University

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Director: Gad s Gad, MD, South Valley University

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
August 1, 2019

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
February 29, 2020

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
March 1, 2020

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
March 2, 2020

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
March 7, 2020

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
March 11, 2020

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
March 11, 2020

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
March 7, 2020

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
March 1, 2020

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • ossamahamdyresearch5

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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