Actively Recruiting
Comparison of Interscalene Brachial Plexus Block Versus Combination of Suprascapular and Infraclavicular Brachial Plexus Blocks for Shoulder Surgery with Diaphragm Function Assessment
Led by Poznan University of Medical Sciences · Updated on 2026-05-22
70
Participants Needed
1
Research Sites
4 weeks
Total Duration
On this page
AI-Summary
What this Trial Is About
Researchers are evaluating two regional anesthesia techniques for patients aged 65 and older undergoing elective shoulder surgery. The study compares the standard interscalene brachial plexus block (ISB), known for effective pain control but often causing hemidiaphragmatic paresis, with a diaphragm-sparing alternative combining a suprascapular nerve block (SSNB) and an infraclavicular brachial plexus block (ICB). The goal is to see if the new approach reduces diaphragm problems while providing similar pain relief. Participants will be randomly assigned to receive either a single-shot ultrasound-guided interscalene block with 20 mL of 0.2% ropivacaine or two ultrasound-guided single-shot blocks: an infraclavicular brachial plexus block with 15 mL and a suprascapular nerve block with 5 mL of 0.2% ropivacaine. All blocks are performed before surgery under ultrasound guidance. The study assesses diaphragm function before and 30-60 minutes after the block. During the study, researchers will monitor diaphragmatic movement using ultrasound, along with postoperative pain scores at rest and during movement over 48 hours, opioid use, pulmonary function, oxygen saturation, respiratory rate, and any block-related complications for up to 30 days. Patient satisfaction and hospital stay length will also be recorded. The study starts in December 2025 and runs through January 2027.
CONDITIONS
Brief Title
Diaphragm-Sparing Regional Anesthesia Techniques for Shoulder Surgery
Who Can Participate
Eligibility Criteria
You may qualify if you...
- Age 65 years or older
- Scheduled for elective shoulder surgery
- Classified as ASA physical status I to III
- Planned use of regional anesthesia
- Signed written informed consent
You will not qualify if you...
- Allergy to local anesthetics
- Planned continuous catheter anesthesia technique
- Body mass index (BMI) over 40 kg/m²
- Coagulopathy or on anticoagulation therapy
- Pre-existing phrenic nerve palsy
- Neurological disorder affecting the operative limb
- Pregnancy or breastfeeding
- Participation in another clinical trial within 30 days
AI-Screening
AI-Powered Screening
Complete this quick 3-step screening to check your eligibility
Your Study Journey
Duration - 2 to 4 weeks
Participants are screened for eligibility to participate in the trial.
1 visit (in-person)
Duration - Single day (before and during surgery)
Participants receive a single-shot ultrasound-guided nerve block prior to elective shoulder surgery. They will either receive an interscalene brachial plexus block or a combination of suprascapular and infraclavicular brachial plexus blocks using 0.2% ropivacaine.
1 visit (in-person)
Duration - Up to 30 days after surgery
Participants are monitored for postoperative pain, respiratory function, opioid use, and any block-related complications for up to 30 days after surgery.
Multiple visits within 48 hours postoperatively and additional follow-up assessments up to 30 days
Trial Site Locations
Total: 1 location
1
Poznan University of Medical Sciences
Poznan, Poland, 62-701
Actively Recruiting
Research Team
M
Malgorzata Reysner, MD PhD
How is the study designed?
Study Type
INTERVENTIONAL
Masking
QUADRUPLE
Allocation
RANDOMIZED
Model
PARALLEL
Primary Purpose
TREATMENT
Number of Arms
2
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