The standard practice for arthroscopic shoulder surgery at our institution is a general anesthetic with a long-acting interscalene block for post-operative pain control, which can reduce the amount of opiates needed after surgery. The interscalene block is effective in providing analgesia to the majority of the shoulder joint and has been shown to reduce post-operative pain scores after arthroscopic shoulder surgeries. However, there is a subset of arthroscopic shoulder surgery patients who have pain in the axilla even in the setting of a functioning interscalene brachial plexus nerve block. One of our surgeons has reported a high incidence of axillary pain in patients who undergo a sub-pectoral biceps tenodesis as part of their arthroscopic procedure. A newly described nerve block approach to the nerves that supply sensation to the axillary region called the PECS "Pectoralis" 1 \& 2 block may provide additional analgesia to these patients. The purpose of this prospective, randomized, observer and patient blinded, single-center, sham block trial is to determine if the addition of PECS blocks to an interscalene block will reduce the severity of axillary pain following arthroscopic shoulder surgery that involves a sub-pectoral biceps tenodesis. Secondarily, the study will assess the duration of PECS 1 \& 2 and whether the block reduces post-operative opioid usage. We hypothesize that the addition of the PECS 1 \& 2 block will reduce the severity of axillary pain at 6hrs and reduce postoperative narcotic usage for the first 24 hours.
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Post-operative Axillary Pain
Timeframe: 6 hours post-block.