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

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

30 participants

Study Classification

INTERVENTIONAL

Study Start Date

2013-10-31

Brief Summary

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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.

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Detailed Description

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Conditions

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Mininimum Effective Anaesthetic Volume of Local Anaesthetic

Study Design

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Allocation Method

NA

Intervention Model

SINGLE_GROUP

Blinding Strategy

DOUBLE

Participants Outcome Assessors

Study Groups

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injection volume

block success or failure determines a 5 ml decrease or increase for the subsequent patient, respectively

Group Type OTHER

lumbar plexus block

Intervention Type OTHER

Interventions

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lumbar plexus block

Intervention Type OTHER

Eligibility Criteria

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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

Minimum Eligible Age

18 Years

Maximum Eligible Age

70 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No