A Comparative Study Between Anterior Glenoid Block With Sub-omohyoid Suprascapular Block Versus Interscalene Block in Shoulder Arthroscopy

July 23, 2025 updated by: riham fathy galal, Ain Shams University

A Comparative Study Between Ultrasound Guided Anterior Glenoid Block Combined With Sub-omohyoid Anterior Suprascapular Block Versus Ultrasound Guided Interscalene Block in Diagnostic Shoulder Arthroscopy

The patients will be randomized into 2 equal groups by a computer-generated random numbers table, named group A, B.

Group A: Patients will receive Anterior glenoid block combined with suprascapular nerve block.

Group B: Patients will receive conventional interscalene block.

In group A, the patient will be supine for anterior glenoid block.

The suprascapular nerve will be identified as it branch off from the superior trunk and will be traced until it courses beneath the inferior belly of the omohyoid muscle.

In group B, interscalene brachial plexus block will be performed.

The primary outcomes will be as follows: (1) 11-point (0-10) numeric rating scale (NRS) pain score immediately before surgery starts and after surgery; (2) degree of preserved diaphragmatic function (DPDF): the ratio of postoperative to pre-block (baseline) diaphragmatic excursion amplitude will be assessed in the holding area using a curvilinear probe (Sono Site, Transportable fuji M-turbo ultrasound system).;(3) degree of preserved handgrip strength (DPHS): the ratio of postoperative to pre-block (baseline) handgrip strength (the maximal force patients exerted when instructed to squeeze the dynamometer handles as tightly as feasible). Measurements will be done before surgery, immediately postoperative, 4, 8, and 24 hours postoperatively.

And (4) Recording of the complications which are: Hematoma, nerve injury, allergy to any of the used drugs.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

60

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Egypt
      • Cairo, Egypt
        • Ain shams university hospitals

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  1. Patients American Society of anesthesiologists' physical status (ASA) I to II.
  2. Aged 18 to 65 years.
  3. Both sexes.
  4. Patients scheduled for shoulder arthroscopy.

Exclusion Criteria:

  1. Patient refusal
  2. ASA physical status III or more.
  3. Patients with known allergy to any of the study drugs.
  4. Infection at the site of injection.
  5. Patients with history of cardiovascular disease.
  6. Patients with renal disease.
  7. Patients with hepatic disease.
  8. Patients with neuromuscular disease.
  9. Presence of any coagulopathy.
  10. Chronic opioid, gabapentin or pregabalin use.
  11. Patients with history of any psychiatric disorder.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Triple

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Group A
Patients will receive Anterior glenoid block combined with suprascapular nerve block.
Procedure: Glenoid nerve block combined with Sub-omohyoid Anterior Suprascapular nerve Block
Ultrasound guided anterior glenoid nerve block combined with Sub-omohyoid Anterior Suprascapular nerve Block
Experimental: Group B
The patients will Interscalene brachial plexus block.
Procedure: Interscalene brachial plexus block
Ultrasound guided interscalene brachial plexus block

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Degree of preserved diaphragmatic function (DPDF)
Time Frame: 24 hours postoperative.
degree of preserved diaphragmatic function (DPDF): the ratio of postoperative to pre-block (baseline) diaphragmatic excursion amplitude will be assessed in the holding area using a curvilinear probe (Sono Site, Transportable fuji M-turbo ultrasound system).). Measurements will be made before surgery, immediately postoperative, 4, 8, and 24 hours postoperatively.
24 hours postoperative.

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
11-point (0-10) numeric rating scale (NRS) pain score.
Time Frame: 24 hours postoperative.
11-point (0-10) numeric rating scale (NRS) pain score immediately before surgery starts and after surgery.). Measurements will be made at 4, 8, and 24 hours postoperatively.
24 hours postoperative.
Degree of preserved handgrip strength (DPHS)
Time Frame: 24 hours postoperative.
Degree of preserved handgrip strength (DPHS): the ratio of postoperative to pre-block (baseline) handgrip strength (the maximal force patients exerted when instructed to squeeze the dynamometer handles as tightly as feasible). Measurements will be made before surgery, immediately postoperative, 4, 8, and 24 hours postoperatively.
24 hours postoperative.
Recording of the complications.
Time Frame: 24 hours postoperative.
Recording of the complications which are: Hematoma, nerve injury, allergy to any of the used drugs.
24 hours postoperative.

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Ain Shams University

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

September 25, 2024

Primary Completion (Actual)

March 30, 2025

Study Completion (Actual)

March 30, 2025

Study Registration Dates

First Submitted

September 14, 2024

First Submitted That Met QC Criteria

September 19, 2024

First Posted (Actual)

September 24, 2024

Study Record Updates

Last Update Posted (Actual)

July 28, 2025

Last Update Submitted That Met QC Criteria

July 23, 2025

Last Verified

July 1, 2025

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • FAMSU R143/2024

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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