Diaphragm-Sparing Regional Anesthesia Techniques for Shoulder Surgery
Key facts
- Where
- Poznan, PolandSee the site
Could this be for you?
Answer for yourself. This is not a decision: only the study team can say whether you can take part.
- Are you between 65 and 100 years old?
Source: NCT07474896, who can take part
Where in Poland
- Poznan University of Medical SciencesPoznan, PolandContact: Malgorzata Reysner, M.D. Ph.D.Taking people
Questions to ask the study team
- How often do I need to come in, and for how long each time?
- Are travel costs paid?
- Can I keep my own doctor?
- What happens if I want to stop?
Contact the study team: see the registry record → Contacts and Locations
Print a page for my doctorTrial details
- Who runs it
- Poznan University of Medical Sciences
- Trial code
- NCT07474896
- Record updated
- 22 May 2026
- Original description
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.Read full original descriptionShow less
Comparison of Interscalene Brachial Plexus Block Versus the Combination of Suprascapular and Infraclavicular Brachial Plexus Block for Shoulder Surgery: A Randomized Controlled Trial With Diaphragmatic Function Assessment
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.
Inclusion: Age ≥ 65 years; Elective shoulder surgery; ASA I-III; Planned use of regional anesthesia; Signed written informed consent.
Exclusion: Allergy to local anesthetics; Neurological disorder of the operative limb; Planned continuous catheter technique; BMI >40 kg/m²; Coagulopathy or anticoagulation; Pre-existing phrenic nerve palsy; Pregnancy or breastfeeding; Participation in another clinical trial within 30 days.