The Mininimum Effective Anaesthetic Volume of Local Anaesthetic in Ultrasound-guided "Shamrock" Lumbar Plexus Block

June 19, 2014 updated by: Axel Rudolf Sauter, Oslo University Hospital
The "Shamrock method" is a new ultrasound-guided lumbar plexus block. The aim of the study is to determine the minimum effective volume of ropivacaine 0.5% required to produce an effective lumbar plexus block with this method. Using the Dixon and Massey up-and-down method study design, 30 patients scheduled for elective total hip and knee arthroplasty will be included in the study.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Anticipated)

30

Phase

  • Not Applicable

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

  • Norway
      • Oslo, Norway, 0027
        • Department of Anaesthesia and Intensive Care Medicine, Oslo University Hospital
      • Oslo, Norway, 0488
        • Oslo University Hospital

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

Ages Eligible for Study

18 years to 70 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • orthopaedic patients scheduled for elective hip and knee arthoroplasty
  • ASA 1 - 2 or stable ASA 3
  • age between 18 and 70 years
  • good ability to communicate and to cooperate

Exclusion Criteria:

  • ASA > 3 or unstable ASA 3
  • BMI > 32
  • chronicle pain
  • nephrological diseases or nephropathy
  • known contraindications against the use of local anaesthetics
  • pregnancy

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

  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: Double

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Other: injection volume
block success or failure determines a 5 ml decrease or increase for the subsequent patient, respectively
Other: lumbar plexus block

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
minimum effective volume
Time Frame: from day 1 up to 20 weeks
The primary outcome measure (MEV) is based on 30 measurements in 30 patients (secondary outcome measure: block success). MEV is determined by Dixon and Massey up-and-down method when all patients have been tested in the study
from day 1 up to 20 weeks

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
block success
Time Frame: Day 1
45 minutes after lumbar plexus blockade was performed
Day 1

Collaborators and Investigators

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

Sponsor

Oslo University Hospital

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Helpful Links

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

October 1, 2013

Primary Completion (Actual)

May 1, 2014

Study Registration Dates

First Submitted

September 26, 2013

First Submitted That Met QC Criteria

October 7, 2013

First Posted (Estimate)

October 8, 2013

Study Record Updates

Last Update Posted (Estimate)

June 23, 2014

Last Update Submitted That Met QC Criteria

June 19, 2014

Last Verified

June 1, 2014

More Information

Terms related to this study

Other Study ID Numbers

  • 2013/1328-3

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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