Diaphragm-Sparing Regional Anesthesia Techniques for Shoulder Surgery

Recruiting now · Not applicable

Conditions studied: Osteoarthritis Shoulder

In brief

This study will compare two regional anesthesia techniques for shoulder surgery and evaluate their effects on diaphragmatic function. The standard regional anesthesia technique for shoulder surgery is the interscalene brachial plexus block (ISB), which provides effective analgesia but is frequently associated with ipsilateral hemidiaphragmatic paresis due to phrenic nerve involvement. An alternative diaphragm-sparing strategy is the combination of a suprascapular nerve block (SSNB) and an infraclavicular brachial plexus block (ICB), which may reduce the risk of diaphragmatic dysfunction while maintaining effective analgesia for shoulder surgery. All participants will receive ultrasound-guided regional anesthesia prior to surgery and will be randomly assigned to one of two groups: Group 1: Interscalene brachial plexus block Group 2: Suprascapular nerve block combined with infraclavicular brachial plexus block The primary aim of this study is to determine whether the diaphragm-sparing technique reduces the incidence of hemidiaphragmatic paresis while providing analgesia comparable to the standard interscalene block. Diaphragmatic movement will be assessed using ultrasound before and after block placement. Secondary outcomes include postoperative pain intensity, opioid consumption, pulmonary function parameters, and block-related complications.

Key facts

Study ID

NCT07474896

Run by

Poznan University of Medical Sciences

People needed

70

Starts

2025-12-10

Expected to finish

2027-01-31

Last updated by the study team

2026-05-22

Who can join

Age: 65 and older, up to 100. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

• Age ≥ 65 years
• Elective shoulder surgery
• ASA I-III
• Planned use of regional anesthesia
• Signed written informed consent

You may not qualify if…

• Allergy to local anesthetics
• Planned continuous catheter technique
• BMI >40 kg/m²
• Coagulopathy or anticoagulation
• Pre-existing phrenic nerve palsy
• Neurological disorder of the operative limb
• Pregnancy or breastfeeding
• Participation in another clinical trial within 30 days

Where it is running

• Poznan University of Medical Sciences — Poznan, Poland (enrolling)

Full record on ClinicalTrials.gov

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