Anesthesia in Total Shoulder Arthroplasty: A Systematic Review and Meta-Analysis.

Area of Science:

• Anesthesiology
• Orthopedic Surgery
• Pain Management

Background:

• Regional anesthesia is increasingly favored over general anesthesia for shoulder arthroplasty due to safety concerns.
• Evidence regarding the superiority of regional anesthesia for pulmonary complications and hospital stay remains limited.
• Various regional anesthesia techniques, including local anesthetic infiltration and brachial plexus blocks, are employed for shoulder procedures.

Purpose of the Study:

• To evaluate the comparative efficacy and safety of different regional anesthesia techniques for shoulder arthroplasty.
• To assess the impact of continuous peripheral nerve blocks versus single-shot blocks on pain and opioid consumption.
• To compare liposomal bupivacaine with traditional local anesthetics and evaluate the role of dexamethasone in perioperative pain management.

Main Methods:

• Systematic review and meta-analysis of high-quality evidence (Level I) comparing anesthesia techniques.
• Analysis of studies focusing on pain scores, opioid requirements, pulmonary complications, and hospital length of stay.
• Inclusion of data on local anesthetic infiltration, single-shot brachial plexus blocks, continuous peripheral nerve blocks, liposomal bupivacaine, and dexamethasone.

Main Results:

• Regional anesthesia demonstrates a better safety profile than general anesthesia for shoulder arthroplasty.
• Continuous peripheral nerve blocks show significantly lower pain scores and reduced perioperative opioid requirements compared to single-shot blocks.
• Local anesthetic infiltration provides no additional benefit over brachial plexus blocks; liposomal bupivacaine shows comparable outcomes to non-liposomal agents.
• Perioperative dexamethasone administration effectively improves pain control, reduces opioid needs, and mitigates postoperative nausea.

Conclusions:

• Regional anesthesia is a safer choice for shoulder arthroplasty, though evidence on specific outcomes like pulmonary complications is insufficient.
• Continuous peripheral nerve blocks offer superior analgesia but are limited by practical implementation challenges.
• Liposomal bupivacaine and perioperative dexamethasone are valuable adjuncts for optimizing pain management and reducing opioid reliance in shoulder arthroplasty.