Axillary Plexus Block in a High Resolution MRI

D

Diakonhjemmet Hospital

Status and phase

Completed
Phase 2

Conditions

Nerve Block
Magnetic Resonance Imaging

Treatments

Procedure: Active Comparator: Arm 3: catheter and transarterial injection
Procedure: Active Comparator: Arm 1: catheter injection
Procedure: Active Comparator: Arm 2: transarterial injection

Study type

Interventional

Funder types

Other

Identifiers

NCT01033006
S-04115

Details and patient eligibility

About

Background and aims: Magnetic resonance imaging (MRI) has proved beneficial for presenting anatomy for regional anaesthesia and to demonstrate spread of local anaesthetic. A new axillary plexus block with a triple injection (1), combining a short axillary catheter method with a transarterial axillary block, is now being evaluated with a 3 Tesla MRI. In this study, the investigators are investigating MR visualisation of three different block techniques and compare the clinical efficacy of the techniques, with the MR findings. Patients & Methods: After obtaining approval of the protocol from the regional ethical committee, 3 x 15 adult patients, scheduled for hand surgery, were included in a randomised, blinded prospective study.

Full description

After obtaining approval of the protocol from the regional ethical committee, 3 x 15 adult patients, scheduled for hand surgery, were included in a randomised, blinded prospective study. In all patients a short axillary plexus catheter is positioned close to the median nerve using nerve stimulator. Technique 1 = 40 ml in catheter Technique 2 = 30 ml behind and 10 ml in front of the brachial artery (BA) Technique 3 = 20 ml behind, 10ml in front of the BA and 10 ml in catheter Clinical High Field MRI (3T) scanner has simplified the recognition of brachial plexus nerves in the axilla. After injection of local anaesthetic (LA), the identification of the nerve structures is nevertheless difficult. When all nerves are surrounded of LA in the axilla (MRI), it seems to be associated with a clinical complete brachial plexus block

Enrollment

45 patients

Sex

All

Ages

18 to 75 years old

Volunteers

No Healthy Volunteers

Inclusion criteria

  • patients scheduled for hand surgery
  • ASA 1 - 2
  • Weight from 50 - 95 kg
  • MR compatible, suitable

Exclusion criteria

  • Neurologic deficit
  • Reaction to LA

Trial design

Primary purpose

Basic Science

Allocation

Randomized

Interventional model

Parallel Assignment

Masking

Double Blind

45 participants in 3 patient groups

Arm 1: catheter injection
Active Comparator group
Description:
40 ml of LA through the catheter
Treatment:
Procedure: Active Comparator: Arm 1: catheter injection
Arm 2: transarterial injection
Active Comparator group
Description:
30 ml deep and 10 ml superficial to the artery
Treatment:
Procedure: Active Comparator: Arm 2: transarterial injection
Arm 3: catheter and transarterial injection
Active Comparator group
Description:
20 + 10 ml transarterial block and 10 ml through the catheter
Treatment:
Procedure: Active Comparator: Arm 3: catheter and transarterial injection

Trial contacts and locations

1

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Data sourced from clinicaltrials.gov

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