Carotid Stenosis Clinical Trial
Official title:
Ultrasound Guided Intermediate Cervical Plexus Block -Randomized Evaluation Concerning the Significance of Additional Perivascular Local Anesthetic Infiltration
For ultrasound guided intermediate cervical plexus block this randomized comparison is testing the hypothesis, that an additional perivascular infiltration is associated with increased block quality.
The innervation of the neck is complex and involves the cervical and the brachial plexus as
well as cranial nerves. So is the wall of the carotid arteries innervated by vagal and
glossopharyngeal nerve as well as the sympathetic trunk. When carotid surgery was performed
under regional anesthesia, so additional infiltration of local anesthetic by the surgeon was
common, particularly during preparation of the carotid arteries.
Introduction of ultrasound guidance made it possible to guide the needle directly to the
vascular wall. But this procedure is considered very demanding, because of guiding the
needle in an anatomical region with artifacts (because of calcification), sudden movements
(e.g. because of swallowing) and compromised coagulation (antithrombotic medication). On the
other side there are no clinical data proving the benefit of an additional perivascular
infiltration with local anesthetic. Therefore, this investigation is testing the hypothesis,
that an additional perivascular infiltration is associated with increased block quality.
;
Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Investigator), Primary Purpose: Treatment
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