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Ultrasonographic guidance improves the success rate of interscalene brachial plexus blockade.| Authors: | Stephan Kapral, Manfred Greher, Gudrun Huber, Harald Willschke, Stephan Kettner, Richard Kdolsky, Peter Marhofer | | Language: | Eng. | | Date: | 24-04-2008 | | Journal: | Regional anesthesia and pain medicine
(1532-8651)
| | Release: | Reg Anesth Pain Med. ;33(3):253-8 | |
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Abstract:
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BACKGROUND AND
OBJECTIVES:
The use of ultrasonography in regional anesthetic blocks has rapidly evolved over the past few years. It has been speculated that ultrasound guidance might increase success rates and reduce complications. The aim of our study is to compare the success rate and quality of interscalene brachial plexus blocks performed either with direct ultrasound visualization or with the aid of nerve stimulation to guide needle placement.
METHODS:
A total of 160 patients (American Society of Anesthesiologists physical status classification I-III) scheduled for trauma-related upper arm surgery were included in this randomized study and grouped according to the guidance method used to deliver 20 mL of ropivacaine 0.75% for interscalene brachial plexus blockade. In the ultrasound group (n = 80), the brachial plexus was visualized with a linear 5 to 10 MHz probe and the spread of the local anesthetic was assessed. In the nerve stimulation group (n = 80), the roots of the brachial plexus were located using a nerve stimulator (0.5 mA, 2 Hz, and 0.1 millisecond bandwidth). The postblock neurologic assessment was performed by a blinded investigator.
RESULTS:
Sensory and motor blockade parameters were recorded at different points of time. Surgical anesthesia was achieved in 99% of patients in the ultrasound vs 91% of patients in the nerve stimulation group (P < .01). Sensory, motor, and extent of blockade was significantly better in the ultrasound group when compared with the nerve stimulation group.
CONCLUSIONS:
The use of ultrasound to guide needle placement and monitor the spread of local anesthetic improves the success rate of interscalene brachial plexus block.
| | Copyright: | Regional anesthesia and pain medicine
Department of Anaesthesia and General Intensive Care Medicine, Herz-Jesu Hospital, Vienna, Austria. | | Full text: |  EBSCO - HTML (needs subscription) | | Terms: | Aged, Arm Injuries, Brachial Plexus, Electric Stimulation, Female, Humans, Injections, Male, Motor Activity, Needles, Nerve Block, Sensation, Single-Blind Method, Statistics, Nonparametric, Time Factors, Treatment Outcome, Ultrasonography, Interventional | | |
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