High Definition Ultrasound Imaging of the Intermuscular Bridges at the Interscalene Groove

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

Total Enrollment

50 participants

Study Classification

OBSERVATIONAL

Study Start Date

2020-09-23

Study Completion Date

2020-12-31

Brief Summary

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This study aims to define the intermuscular bridges between the scalene muscles at the interscalene groove (around neck area) using high definition US imaging in a cohort of volunteers.

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Detailed Description

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The Interscalene brachial plexus block (ISBPB), with recent techniques like phrenic nerve sparing interscalene approach, has better safety profile than before and because of this, it is often the technique of choice for anaesthesia and/or analgesia during shoulder and proximal arm surgery. Anatomical variations at the interscalene groove are not uncommon and few have been described in the literature. Understanding the anatomy of the brachial plexus and its sheath at the interscalene groove is vital for the success of the block and to reduce the risk of complications during ultrasound (US) guided ISBPB. Recently, with the use of high definition ultrasound, using high frequency linear transducer, the principal investigator have identified intermuscular bridges appearing between the ventral rami of the brachial plexus at the interscalene groove. These intermuscular bridges may affect the spread of local anesthetic dispersion within the brachial plexus sheath thereby affecting the block dynamics of ISBPB. Therefore, this prospective observational study aim to define the intermuscular bridges at the interscalene groove using high definition ultrasound imaging in a group of healthy volunteers.

Conditions

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Healthy

Study Design

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Observational Model Type

COHORT

Study Time Perspective

PROSPECTIVE

Interventions

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Ultrasound scan

Volunteers will have an ultrasound scanning of both sides of their neck lying in supine position. Sequentially the scanning will start from the base of the neck (supraclavicular fossa) to the upper part of the interscalene groove and then in the reverse direction to the supraclavicular fossa. Images will be recorded as video loops.

Intervention Type OTHER