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Clinical Trial Summary

Ultrasound-guided supraclavicular brachial plexus block (US-SCBPB) has been a generalized regional anesthesia in upper extremity surgery. It is performed just above the clavicle, in which the neural cluster formed by the trunks or divisions of the brachial plexus is situated superolateral to the subclavian artery (SA).

In many approaches, corner pocket approach [deposit local anesthetic (LA) at the intersection of the SA, neural cluster, and the first rib] and cluster approach (direct deposit LA into the neural cluster after penetration of the sheath of brachial plexus) has been well known methods. And single or multiple injection techniques has been used with the above approaches.


Clinical Trial Description

In clinical practices, the investigators observed that the neural cluster was shown differently every person on the ultrasound image. Some neural cluster is shown as a typical round cluster of grapes lateral to the SA, in which, any approaches of US-SCBPB can be possible and good success rates are anticipated. But in many cases, neural cluster was shown in part lateral or superolateral to the SA like slightly-hated SA on the ultrasound image, and it passes posterior to the SA when the probe follows the path of the neural cluster along the SA. In that case, corner pocket approach is hard to apply due to the position of the neural cluster far away from the first rib, cluster approach increases chance of lopsided spreading of the LA, and multiple injection is also hard to apply due to narrow-shaped neural cluster. Therefore, we hypothesized that double injection in different plane (we call this new approach as a 2 plane-2 injection approach) would achieve an effect of a "tridimensionally administered LA", which is presented like shortening the onset time or increasing rate of all four nerves block compared with the existing cluster approach (the investigators call this as an 1 plane- 1 injection approach in this study). ;


Study Design

Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Investigator)


Related Conditions & MeSH terms


NCT number NCT02505633
Study type Interventional
Source Gachon University Gil Medical Center
Contact
Status Completed
Phase N/A
Start date July 2015
Completion date September 2015

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