Nerve Block Clinical Trial
Official title:
Ultrasound Guidance or Electrical Nerve Stimulation for Interscalene Brachial Plexus Block: a Randomized, Controlled Trial
This study has been designed to assess the possible advantages of using ultrasound imaging
to block the brachial plexus (i.e., nerves of the upper limb) in patients undergoing
shoulder surgery.
The ultrasound technique will be compared with the current gold standard, electrical nerve
stimulation.
The aim of this study is to define which technique is better in terms of time to onset of
anesthesia.
The study will compare real-time ultrasound (US) guidance and electrical nerve stimulation
(ENS) in terms of onset time for interscalene brachial plexus anesthesia.
The main hypothesis is that direct visualization of neural structures under US guidance will
grant better local anesthetic (LA) disposition around the roots of the plexus, thus
improving onset times.
Perineural catheters will be used to maintain regional analgesia for 48 hours after surgery.
We hypothesize that US guidance may also help physicians place perineural catheters more
precisely, thus improving analgesia in the following hours to days.
Finally, we will investigate for possible differences in minor adverse events such as
vascular puncture, pain during the anesthetic procedure.
;
Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Single Blind (Outcomes Assessor), Primary Purpose: Treatment
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