A study found that the superior trunk block (STB) is an effective phrenic-sparing alternative to the interscalene block for shoulder arthroscopy. The STB was found to provide comparable analgesia and motor block while avoiding the potential risk of phrenic nerve paralysis associated with the interscalene block. The study suggests that the STB can be a valuable alternative for patients undergoing shoulder arthroscopy, potentially reducing the risk of adverse events while still providing effective pain management. This finding may have implications for the use of regional anesthesia in shoulder surgeries, offering a safer alternative for patients.
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