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Diaphragm-Sparing Regional Anesthesia Techniques for Shoulder Surgery

NCT07474896 · Status: RECRUITING · Phase: NA · Type: INTERVENTIONAL · Enrollment: 70

Last updated 2026-05-22

No results posted yet for this study

Summary

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.

Conditions

  • Osteoarthritis Shoulder

Interventions

DRUG

Ropivacaine 0.2% for Interscalene Block

Participants in this arm will receive an ultrasound-guided interscalene brachial plexus block using 20 mL of 0.2% ropivacaine. The block will be performed as a single-shot injection prior to shoulder surgery. No suprascapular or infraclavicular block will be performed in this group

DRUG

Ropivacaine 0.2% for Infraclavicular and Suprascapular Nerve Blocks

Participants in this arm will receive two ultrasound-guided peripheral nerve blocks as part of the diaphragm-sparing strategy: Infraclavicular brachial plexus block: 15 mL of 0.2% ropivacaine Suprascapular nerve block: 5 mL of 0.2% ropivacaine Both injections will be performed as single-shot blocks prior to surgery. No interscalene block will be performed in this arm

Sponsors & Collaborators

  • Poznan University of Medical Sciences

    lead OTHER

Principal Investigators

  • Malgorzata Reysner, MD PhD · Poznan University of Medical Sciences

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
QUADRUPLE
Model
PARALLEL

Eligibility

Min Age
65 Years
Max Age
100 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2025-12-10
Primary Completion
2027-01-01
Completion
2027-01-31

Countries

  • Poland

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07474896 on ClinicalTrials.gov