Interscalene Block Versus Combined Supraprascapular: Axillary Nerve Blocks

Status Completed

Clinical Trial Summary

The interscalene block provides effective analgesia after shoulder surgery. It consists of injecting local anaesthetic within the brachial plexus, in the interscalene groove, between the anterior and middle scalene muscles. Unfortunately, this technique is associated with respiratory complications such as hemidiaphragmatic paresis due to the spread of the local anaesthetic towards the phrenic nerve that lies close to the brachial plexus, with an incidence up to 100%. The diaphragmatic paresis may be a serious side-effect, especially in patients suffering from a reduced respiratory function such as chronic obstructive pulmonary disease; this entity may even represent a contraindication to the performance of the block.

The shoulder is mainly innervated by the suprascapular and axillary nerves, both of them coming from C5 and C6 branches of the brachial plexus block. Recently, several authors have successfully identified and block these two nerves under ultrasound guidance. Only one randomised controlled trial compared interscalene block with a combination of suprascapular and axillary nerve blocks, and showed inconclusive results probably due to the absence of ultrasound guidance; indeed, analgesia was equivalent at the sixth postoperative hour, while patients with an interscalene block had reduced pain scores in the recovery room. Besides, the authors did not investigate the impact on the respiratory function.

In that randomised controlled trial, the investigators would like to compare the analgesic efficacy and the respiratory outcomes between the interscalene block and the combined suprascapular-axillary nerve blocks.

Clinical Trial Description

n/a

Study Design

Related Conditions & MeSH terms

Clinical Trial Details

NCT number	NCT02916342
Study type	Interventional
Source	Centre Hospitalier Universitaire Vaudois
Contact
Status	Completed
Phase	Phase 4
Start date	September 2016
Completion date	April 2019

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