Stanford University
Peripheral nerve blocks are routinely used and highly successful for intra-operative anesthesia and post-operative pain management. Nerve blocks are guided using either neurostimulation as a means to localize the right nerve or by ultrasound guidance or combining the 2 methods. The purpose of this study is to assess whether electrical stimulation improves nerve block quality, beyond its simple purpose of nerve localization.
The investigators wish to understand how electrical stimulation can affect local anesthetic disposition when performing a peripheral nerve block. By studying this subject, the investigators open possibilities for improvement on many levels: increasing the efficacy of the nerve block allows for a reduced onset time, reduced incidence of incomplete block and prolonged duration of the local anesthetics. This allows for patients to fully benefit from the analgesic properties of the nerve block, allows for a decrease in delays for the operating room readiness, and a decrease in the amount of medi…
Inclusion Criteria: * Undergoing elective upper limb surgery with a planned brachial plexus nerve block Exclusion Criteria: * Under 18 years old * ASA score above III * Chronic pain condition with daily milligrams of morphine equivalent \> 30 * Poorly controlled psychiatric condition * Coagulopathy * Active infection * Moderate, severe or progressing neuropathy * COPD/Chronic oxygen user * Pregnancy * Incarceration * Unable to consent * BMI \> 35 * Pacemaker
Nerve stimulator that is traditionally used for nerve localization during block placements.
Stimulator will be placed and turned on, but the grounding electrode will not be connected to prevent nerve stimulation.
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