Interscalene Block Versus Serratus Posterior Superior Intercostal Plane Block for Arthroscopic Shoulder Surgery

Comparison of the Effectiveness of Interscalene Nerve Block and Serratus Posterior Superior Intercostal Plane Block in Patients Undergoing Arthroscopic Shoulder Surgery

This randomized controlled trial aims to compare the effectiveness of interscalene (ISB) and serratus posterior superior intercostal plane block (SPSIP) for postoperative analgesia in patients undergoing elective arthroscopic shoulder surgery. The primary outcome is total 24-hour opioid consumption. Secondary outcomes include pain scores, hemidiaphragmatic paresis incidence and severity, duration of analgesia, and changes in lung function. Participants are randomized into ISB or SPSIP groups; blocks are performed under ultrasound guidance. Postoperative pain is managed with patient controlled analgesia(PCA).

Inclusion Criteria:

• Agreeing to participate in the study
• The American Society of Anesthesiologists I-III
• Scheduled for elective unilateral arthroscopic shoulder surgery

Exclusion Criteria:

• Refusal to participate in the study
• Allergy to the medications to be used
• History of serious heart, kidney or liver disease
• Neurological deficits or neuropathy
• History of anticoagulant use
• Pre-existing operative respiratory dysfunction
• Having chronic shoulder pain
• Being about to undergo open surgery