Minimum Effective Concentration of Local AnestheticNCT02286336
The Minimum Effective Concentration of Ropivacaine in Ultrasound-guided Supraclavicular Block
A study testing brachial plexus block in people with Minimum Effective Concentration of Local Anesthetic, run by Huazhong University of Science and Technology at 1 site in China.
Trial summary
The aim of this study is to determine the minimum effective concentration of local anesthetic (ropivacaine 40mL) required to produce an effective double-injection USG-SCB for surgical anesthesia in 90% of patients (MEC90) in young group (18-40 years) and in middle aged group (40-65 years) of patients scheduled for… Read more about this study
- Who is it for?
- Ages 18 to 65 years
- Conditions the study is for
- Minimum Effective Concentration of Local Anesthetic
- What is being tested?
- brachial plexus block
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 102 participants
- Where
- 1 siteChina
- Study dates
- Oct 2014to Mar 2015
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 65 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- age between 18 and 65 years
- ASA 1-3
- body mass index between 18 and 35kg/m2
Who cannot join
- inability to consent to the study
- pregnancy
- allergy to local anesthetics
- preexisting neuropathy or coagulopathy
- prior surgery in the supraclavicular region
Trial locations and contacts
1 site in 1 country.
China1 site
Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology
Wuhan, Hubei, 430030
About this study
The aim of this study is to determine the minimum effective concentration of local anesthetic (ropivacaine 40mL) required to produce an effective double-injection USG-SCB for surgical anesthesia in 90% of patients (MEC90) in young group (18-40 years) and in middle aged group (40-65 years) of patients scheduled for elective surgery of one upper limb distal to the shoulder.
Read the detailed description
The study is based on biased coin design, and the concentration of LA for the next patient is determined by the result of the last one. In the case of block failure, the concentration will be increased by 0.025%. Conversely, block success will result in either a reduction in concentration by 0.025% (probability 11%) or no change in concentration (probability 89%). A blinded assistant will assess sensory and motor blockade in each nerve territory ( the median, radial, ulnar and musculocutaneous nerves) at 10-min intervals up to 30 min after completion of the block. Finally, MEC90 is calculated by isotonic regression.
- Being tested
- brachial plexus block
- Keywords
- minimum effective concentration, ropivacaine, ultrasound-guided supraclavicular block
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
brachial plexus blockOther
Also called ultrasound guided supraclavicular block
brachial plexus block with ropivacaine 40ml
| Study group | Role | What they receive |
|---|---|---|
| middle aged group | Experimental | brachial plexus block with ropivacaine 40ml, MEC90 for USG-SCB Receives: Other: brachial plexus block |
| young group | Active comparator | brachial plexus block with ropivacaine 40ml, MEC90 for USG-SCB Receives: Other: brachial plexus block |
What is being measured
The primary outcome is the main question the study is designed to answer.
The Minimum Effective Concentration of Ropivacaine in Ultrasound-guided Supraclavicular Block
The Minimum Effective Concentration (MEC) of Ropivacaine in Ultrasound-guided Supraclavicular Block is based on 60 measurements in 60 patients (secondary outcome measure: block success). MEC is determined by biased coin design method when all patients have been tested in the study.
Measured: up to 6 months
Secondary outcomes (1)
Block success
A blinded Assistant assess the sensory and motor block onset time for each nerve (median, radial, ulnar and musculocutaneous) at 10-min intervals up to 30 min after completion of the block.
Measured: up to 30 minutes after nerve block is performed
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted7 Nov 2014 (estimated)
- Study startOct 2014
- Primary completionFeb 2015
- Study completionMar 2015
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Minimum Effective Concentration of Local AnestheticStudies of the same condition, open and under way.
- More trials run by Huazhong University of Science and TechnologyThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Non-randomised
- Intervention model
- Parallel groups
- Masking
- Double blind
- Who is masked
- Participant, Outcomes assessor
- Enrolment
- 102 participants (actual)
Sponsor and investigators
- Lead sponsor
- Huazhong University of Science and Technology
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Fang Gang, Huazhong University of Science and Technology
- Investigators
- Ailin Luo, MD.,PhD, Study chair, Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT02286336
- Sponsor's protocol ID
- 2014-64
- Status last verified
- Jul 2015
- First submitted
- 2 Nov 2014
- Last updated
- 28 Jul 2015
- Results posted
- No
- Data monitoring committee
- No
Study at a glance
From the registry record, last updated by the sponsor on 28 Jul 2015. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- The Minimum Effective Concentration of Ropivacaine in Ultrasound-guided Supraclavicular Block
- ClinicalTrials.gov ID
- NCT02286336
- Acronym / sponsor ID
- 2014-64
- Keywords
- minimum effective concentration, ropivacaine, ultrasound-guided supraclavicular block
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 102 participants (actual)
- Lead sponsor
- Huazhong University of Science and TechnologyUniversity, hospital or other
- Study start
- Oct 2014
- Primary completion
- Feb 2015 (actual)
- Study completion
- Mar 2015 (actual)
- First posted
- 7 Nov 2014 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The aim of this study is to determine the minimum effective concentration of local anesthetic (ropivacaine 40mL) required to produce an effective double-injection USG-SCB for surgical anesthesia in 90% of patients (MEC90) in young group (18-40 years) and in middle aged group (40-65 years) of patients scheduled for elective surgery of one upper limb distal to the shoulder.
Detailed description
The study is based on biased coin design, and the concentration of LA for the next patient is determined by the result of the last one. In the case of block failure, the concentration will be increased by 0.025%. Conversely, block success will result in either a reduction in concentration by 0.025% (probability 11%) or no change in concentration (probability 89%). A blinded assistant will assess sensory and motor blockade in each nerve territory ( the median, radial, ulnar and musculocutaneous nerves) at 10-min intervals up to 30 min after completion of the block. Finally, MEC90 is calculated by isotonic regression.
Study design
- Primary purpose
- Treatment
- Allocation
- Non-randomised
- Intervention model
- Parallel groups
- Masking
- Double blind (participant, outcomes assessor)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| middle aged group | Experimental | Other: brachial plexus blockbrachial plexus block with ropivacaine 40ml, MEC90 for USG-SCB |
| young group | Active comparator | Other: brachial plexus blockbrachial plexus block with ropivacaine 40ml, MEC90 for USG-SCB |
Who may qualify
- Ages
- 18 to 65 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (3 listed)
- age between 18 and 65 years
- ASA 1-3
- body mass index between 18 and 35kg/m2
Key exclusion criteria (5 listed)
- inability to consent to the study
- pregnancy
- allergy to local anesthetics
- preexisting neuropathy or coagulopathy
- prior surgery in the supraclavicular region
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| brachial plexus blockAlso: ultrasound guided supraclavicular blockbrachial plexus block with ropivacaine 40ml | Other | middle aged group, young group |
Primary outcome
The Minimum Effective Concentration of Ropivacaine in Ultrasound-guided Supraclavicular Block
Time frame: up to 6 months
The Minimum Effective Concentration (MEC) of Ropivacaine in Ultrasound-guided Supraclavicular Block is based on 60 measurements in 60 patients (secondary outcome measure: block success). MEC is determined by biased coin design method when all patients have been tested in the study.
1 secondary outcome
Block success
Time frame: up to 30 minutes after nerve block is performed
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 28 Jul 2015.
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Ailin Luo, MD.,PhD study chair
Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing brachial plexus block in people with Minimum Effective Concentration of Local Anesthetic, run by Huazhong University of Science and Technology at 1 site in China.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 3 inclusion and 5 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 28 Jul 2015. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in China. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
The Minimum Effective Concentration of Ropivacaine in Ultrasound-guided Supraclavicular Block (time frame: up to 6 months). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 28 Jul 2015.