Although brachial plexus block is not without risk, it usually affects fewer organ systems than general anesthesia. There are multiple approaches to blockade of the brachial plexus, beginning proximally with the interscalene block and continuing distally with the supraclavicular, infraclavicular, and axillary blocks. Anatomical illustration of the brachial plexus with areas of roots, collins regional anesthesia pdf, divisions and cords marked.
Clicking on names of branches will link to their Wikipedia entry. To achieve an optimal block, the tip of the needle should be close to the nerves of the plexus during the injection of local anesthetic solution. Injection close to the point of elicitation of such a paresthesia may result in a good block. A peripheral nerve stimulator connected to an appropriate needle allows emission of electric current from the needle tip.
Observation of local anesthetic surrounding the nerves during ultrasound-guided injection is predictive of a successful block. X” represents the site of entry of the needle when performing an interscalene block. Right: diagram of the course of the brachial plexus in relation to other important anatomic structures in the right side of the neck. These signs and symptoms are transient however, and do not commonly result in any long-term problems, although they may be significantly distressing to patients until the effects subside. This results in rapid onset times and, ultimately, high success rates for surgery and analgesia of the upper extremity, excluding the shoulder. Proximity to the brachial plexus can be determined using by elicitation of a paresthesia, use of a peripheral nerve stimulator, or ultrasound guidance. However, the supraclavicular block is often quicker to perform and may result in fewer side effects than the interscalene block.