Effect of Clonidine Additive to suprascapular_ Costoclavicular Versus Standard Interscalene Block in Arthroscopic Shoulder Surgeries

NCT07256938 | Not Yet Recruiting Phase 4 DMC FDA Drug

• 1 other identifier: clonidine + suprascapular
• Study Type: interventional
• Target: 60
• Locations: 0 countries
• Sites: N/A

Brief Summary

Postoperative analgesia for shoulder surgery is typically achieved by providing an interscalene brachial plexus block. However, a very common side effect of this block is hemi-diaphragmatic paralysis, a state which may not be tolerated in patients with pulmonary conditions such as COPD. Recently, clinicians have explored new ways to provide satisfactory analgesia while minimizing the pulmonary side effects of the interscalene nerve block. One of these solutions might be to offer the patient a suprascapular nerve block combined to costoclavicular block. Since these blocks are performed lower in the neck or under the clavicle, the phrenic nerve is less likely to be blocked. Thus, fewer respiratory side effects have been reported when using such blocks. Hypothesis The main hypothesis of this study is that the addition of clonidine to suprascapular block combined with costoclavicular block is not inferior to the standard interscalene brachial plexus block in terms of postoperative analgesia. We postulate that pain score postoperatively and opioid requirements will not differ significantly in patients who receive either block. Our secondary objectives will consist in looking at the differences in intraoperative , arm motor block , diaphragmatic paresis , patient satisfaction and time for readiness to discharge from PACU .we hypothesize that these outcomes will be similar in both groups , with the exception of a potential reduction in arm motor block and diaphragmatic paresis in the combined suprascapular and costoclavicular block group The primary objective of this study will be to evaluate the postoperative pain score during arthroscopic shoulder surgery assessed by the pain score when comparing the effect of addition of clonidine to suprascapular\_costoclavicular versus standard interscalene

Conditions

Arthroscopic Shoulder Surgeries

Outcome Measures

Primary Outcomes (1)

• postoperative pain score

  to evaluate postoperative pain score during arthroscopic shoulder surgery assessed by the pain score when comparing the combined suprascapular and costoclavicular nerve blocks to the interscalene brachial plexus block

  24 hours postoperative

Study Arms (2)

Group A

ACTIVE COMPARATOR

US-guided costoclavicular block

Drug: Bupivacaine 0.5% (hyperbaric); Procedure: US-guided costoclavicular block; Procedure: Interscalene brachial plexus block; Drug: clonidine 1 mg / kg

Group B

ACTIVE COMPARATOR

US-guided interscalene brachial plexus block

Drug: Bupivacaine 0.5% (hyperbaric); Procedure: US-guided costoclavicular block; Drug: clonidine 1 mg / kg; Procedure: single shot US-guided suprascapular nerve block

Interventions

Bupivacaine 0.5% (hyperbaric) DRUG

5 mL bupivacaine 0.5%,

Group A; Group B

US-guided costoclavicular block PROCEDURE

US-guided costoclavicular block

Group A; Group B

Interscalene brachial plexus block PROCEDURE

single shot US-guided interscalene brachial plexus block

Group A

clonidine 1 mg / kg DRUG

clonidine 1 mg / kg

Group A; Group B

single shot US-guided suprascapular nerve block PROCEDURE

single shot US-guided suprascapular nerve block

Group B

Eligibility Criteria

• Age: 18 Years - 60 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64)

You may qualify if:

• ASA status 1,2,3. Age( 18-60) years Elective shoulder arthroscopic surgery under general anesthesia and nerve bloc performed preoperatively

You may not qualify if:

• Patient refusal Coagulation disorders. Anatomical disorders and/or neuropathic disease. BMI above 40. History of substance abuse. Chronic use of psychotropic and/or opioid. History of psychiatric diseases needing treatment. Contraindications to nerve block for shoulder surgery. Allergy to fentanil or any drug in the study protocol. Failure of nerve block performed in the preoperative block room when tested prior to entering the operating room (i.e. lack of loss of sensation to ice at the shoulder incision level).

Sponsors & Collaborators

• Assiut University: lead

MeSH Terms

Interventions

Bupivacaine; Clonidine

Intervention Hierarchy (Ancestors)

Anilides; Amides; Organic Chemicals; Aniline Compounds; Amines; Imidazolines; Imidazoles; Azoles; Heterocyclic Compounds, 1-Ring; Heterocyclic Compounds

Study Design

• Study Type: interventional
• Phase: phase 4
• Allocation: RANDOMIZED
• Masking: QUADRUPLE
• Who Masked: PARTICIPANT, CARE PROVIDER, INVESTIGATOR, OUTCOMES ASSESSOR
• Purpose: TREATMENT
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: residant doctor at Assiut university hospital

Study Record Dates

• First Submitted: November 21, 2025
• First Posted: December 1, 2025
• Study Start: December 1, 2025
• Primary Completion (Estimated): December 1, 2026
• Study Completion (Estimated): December 1, 2027
• Last Updated: December 1, 2025

Record last verified: 2025-11