Comparison of Pulmonary Function and Efficacy of Different Nerve Block Catheters for Shoulder Surgery

A Comparative Pulmonary Function Study of Continuous Supraclavicular, Suprascapular, and Interscalene Nerve Catheters After Total Shoulder Arthroplasty

This study is designed to evaluate lung function and pain control of continuous supraclavicular versus suprascapular versus interscalene nerve catheters in subjects undergoing total shoulder replacement. The investigators hypothesize that all three groups would have similar pain control; the supraclavicular and suprascapular groups may have better lung function.

Inclusion Criteria:

• Unilateral total shoulder arthroplasty
• ASA physical status I-III
• >18 years old
• Non-pregnant (or lactating)
• Consent to participate in the study

Exclusion Criteria:

• Refusal to participate
• < 18 years old
• Chronic opioid use
• Localized infection
• Pregnancy or lactating
• Pre-existing coagulopathy
• Allergy to ultrasound gel or local anesthetics
• Diaphragmatic dysfunction