Completed

NCT Number: NCT02982031

A Comparison of Visualization Between Shamrock Technique and Paramedian Transverse Scan in Lumbar Plexus Blockade

The primary objective of this study was to compare ultrasound visibility of the lumbar plexus at the intertransverse space between paramedian transverse scan and shamrock technique. Moreover obtaining a clear image of relevant structures is imperative. Thus, the secondary objective was to assess ultrasound visibility of each relevant structure and overall visibility between these two methods.

Completed

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Key information

Conditions

Lumbar Plexus Blockade

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Siriraj hospital

Bangkok, 10700, Thailand

About this study

Background: Ultrasound-guided lumbar plexus block (USG LPB) is regarded as a form of advanced ultrasound-guided regional anesthesia (USGRA). One of the key challenges of USG LPB is visualization of the lumbar plexus. That are currently in use for ultrasound-guided lumbar plexus blockade - paramedian transverse scan (PMTS) and shamrock technique.

Method: Twenty-three healthy adult volunteers aged ≥ 18 years were enrolled in this prospective cohort study. Ultrasound visualization results were compared between methods.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

healthy volunteer, age >/= 18

Exclusion criteria

spinal deformity and history of previous back or spine surgery

Treatment and study plan

shamrock

Procedure

This scanning technique is performed in the lateral decubitus position with the side of interest facing upwards. The transducer is placed in the transverse plane on the flank of the patient cranially to the iliac crest. The quadratus lumborum muscle is identified medial to the aponeurosis of the transversus abdominis muscle. With the psoas muscle anterior to the transverse process, the erector spinae muscle posterior to the transverse process, and the quadratus lumborum muscle attached to the apex of the transverse process of L4.

paramedian transverse scan

Procedure

The ultrasound transducer is positioned 4 cm lateral to the midline along the intercristal line and just above the iliac crest. The transducer is also directed slightly medially.

Primary outcomes

Percentage of Video (VDO) loops visualization of lumbar plexus

Time frame: 1 month

Percentage of Video (VDO) loops visualization of lumbar plexus comparing between two techniques

Secondary outcomes

Ultrasound visibility score of each relevant structures

Time frame: 1 month

10 structures: Erector spinae muscle, Quadratus lumborum muscle, Psoas muscle, Vertebral body, Inferior vena cava, Articular process of the lumbar vertebra, Lumbar paravertebral space, lumbar nerve root, Lumbar plexus nerve, Psoas compartment Using 4-point Likert scale (0, not visible; 1, hardly visible; 2, well visible; 3, very well visible)
Overall ultrasound visibility score of 10 structures

Time frame: 1 month

Sum of ultrasound visibility score of 10 relevant structures: Erector spinae muscle, Quadratus lumborum muscle, Psoas muscle, Vertebral body, Inferior vena cava, Articular process of the lumbar vertebra, Lumbar paravertebral space, lumbar nerve root, Lumbar plexus nerve, Psoas compartment

Sponsors and collaborators

Lead sponsor

Mahidol University

Other

Registry information

Important dates

Study start: 2016
Primary completion: 2016
Study completion: 2016
First posted: Dec 5, 2016
Registry last updated: Dec 5, 2016

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.