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CTRI Number  CTRI/2025/05/086775 [Registered on: 13/05/2025] Trial Registered Prospectively
Last Modified On: 15/08/2025
Post Graduate Thesis  No 
Type of Trial  Interventional 
Type of Study   Surgical/Anesthesia 
Study Design  Randomized, Parallel Group Trial 
Public Title of Study   Randomized control trial of comparison between selective blockade of supraclavicular nerves and upper trunk of brachial plexus called the scut block and conventional interscalene blocks for clavicle surgeries. 
Scientific Title of Study   COMPARISON BETWEEN SELECTIVE BLOCKADE OF SUPRACLAVICULAR NERVES AND UPPER TRUNK OF BRACHIAL PLEXUS “THE SCUT BLOCK” AND CONVENTIONAL INTERSCALENE BLOCKS FOR CLAVICLE SURGERIES: A RANDOMIZED CONTROL TRIAL.  
Trial Acronym  nil 
Secondary IDs if Any  
Secondary ID  Identifier 
NIL  NIL 
 
Details of Principal Investigator or overall Trial Coordinator (multi-center study)  
Name  sripriyankaR 
Designation  Assistant Professor 
Affiliation  ACS Medical College and Hospital 
Address  No:28, Sri ram nagar extension Paruthipattu Avadi,chennai

Chennai
TAMIL NADU
600071
India 
Phone  9500501695  
Fax    
Email  sripriyanka2712@gmail.com  
 
Details of Contact Person
Scientific Query
 
Name  sripriyankaR 
Designation  Assistant Professor 
Affiliation  ACS Medical College and Hospital 
Address  No:28, Sri ram nagar extension Paruthipattu Avadi,chennai
Duty Anaesthesiologist Room, OG OT complex, ACS Medical college and hospital , velappanchavadi, poonamalli high road, Chennai-60071
Chennai
TAMIL NADU
600071
India 
Phone  9500501695  
Fax    
Email  sripriyanka2712@gmail.com  
 
Details of Contact Person
Public Query
 
Name  sripriyankaR 
Designation  Assistant Professor 
Affiliation  ACS Medical College and Hospital 
Address  No:28, Sri ram nagar extension Paruthipattu Avadi,chennai
Duty anaesthesiologist room, OG OT Complex, ACS Medical college and hospital , velappanchavadi, poonamalli high road, Chennai- 600071
Chennai
TAMIL NADU
600071
India 
Phone  9500501695  
Fax    
Email  sripriyanka2712@gmail.com  
 
Source of Monetary or Material Support  
Department of anaesthesia ACS medical college and hospital Poonamalli high road velappanchavady Chennai-600077 
 
Primary Sponsor  
Name  ACS Medical college and Hospital 
Address  ACS medical college and hospital poonamalli high road vellapanchavady Chennai -600077 
Type of Sponsor  Private medical college 
 
Details of Secondary Sponsor  
Name  Address 
NIL  NIL 
 
Countries of Recruitment     India  
Sites of Study  
No of Sites = 1  
Name of Principal Investigator  Name of Site  Site Address  Phone/Fax/Email 
Dr Sripriyanka R  ACS medical college and hospital   Department of anaesthesia operational theatre complex ACS medical college and hospital poonamallee high road velappanchavadi Chennai
Chennai
TAMIL NADU 
9500501695

sripriyanka2712@gmail.com 
 
Details of Ethics Committee  
No of Ethics Committees= 1  
Name of Committee  Approval Status 
ACS medical college hospital Dr.MGR educational and research institute (deemed to be university) Institutional ethics committee  Approved 
 
Regulatory Clearance Status from DCGI  
Status 
Not Applicable 
 
Health Condition / Problems Studied
Modification(s)  
Health Type  Condition 
Patients  (1) ICD-10 Condition: S420||Fracture of clavicle, (2) ICD-10 Condition: S420||Fracture of clavicle,  
 
Intervention / Comparator Agent  
Type  Name  Details 
Comparator Agent  Group A we give supraclavicular and upper trunk block  we take around 120 patients into trial and we give supraclavicular and upper trunk block to group A patients with 10 ml of 0.5% ropivacaine will be administered under ultrasound guidance  
Comparator Agent  Group B we give interscalene and suoraclavicular   60 patients are in group B for these patients we give interscalene and supraclavicular block using a larger volume of 20 to 30 ml of ropivacaine  
Intervention  Supra clavicular nerve and upper trunk block compared with inter scalene brachial plexus block and supra clavicualr nerve block  To compare the effectiveness and safety of the selective blockade of supraclavicular nerves and upper trunk of the brachial plexus called as SCUT block with the conventional interscalene block in patients undergoing clavicle surgeries. 
 
Inclusion Criteria  
Age From  18.00 Year(s)
Age To  70.00 Year(s)
Gender  Both 
Details  Patients aged 18–70 undergoing clavicle surgery (e.g., open reduction and internal
fixation
• ASA (American Society of Anaesthesiologists) physical status I–III.
• Patients providing informed consent for participation in the trial. 
 
ExclusionCriteria 
Details  Patient refusal for surgery
Bleeding diathesis
Infection at the site of surgery
Polytrauma  
 
Method of Generating Random Sequence   Computer generated randomization 
Method of Concealment   Sequentially numbered, sealed, opaque envelopes 
Blinding/Masking   Participant and Outcome Assessor Blinded 
Primary Outcome  
Outcome  TimePoints 
To compare the post-op pain score - measured using Visual Analog Scale (VAS)
• To compare the incidence of diaphragmatic paralysis - associated with USG guidance.
 
till 12 hours post op 
 
Secondary Outcome  
Outcome  TimePoints 
To compare the post-op opioid consumption.
• To compare the patient satisfaction
• To compare the surgeon satisfaction
• To compare the time to first opioid reuse analgesia.
 
24 hours post procedure 
 
Target Sample Size   Total Sample Size="60"
Sample Size from India="60" 
Final Enrollment numbers achieved (Total)= "Applicable only for Completed/Terminated trials"
Final Enrollment numbers achieved (India)="Applicable only for Completed/Terminated trials" 
Phase of Trial   Phase 4 
Date of First Enrollment (India)   30/05/2025 
Date of Study Completion (India) Applicable only for Completed/Terminated trials 
Date of First Enrollment (Global)  Date Missing 
Date of Study Completion (Global) Applicable only for Completed/Terminated trials 
Estimated Duration of Trial   Years="0"
Months="8"
Days="0" 
Recruitment Status of Trial (Global)
Modification(s)  
Not Applicable 
Recruitment Status of Trial (India)  Open to Recruitment 
Publication Details   N/A 
Individual Participant Data (IPD) Sharing Statement

Will individual participant data (IPD) be shared publicly (including data dictionaries)?  

Response - NO
Brief Summary   Regional anesthesia has been shown to improve patient outcomes in upper limb surgeries but a site specific approach for clavicle surgeries remain under developed. Traditionally the combination of interscalene brachial plexus block and superficial cervical plexus block has been used. however these techniques are not selective for clavicular innervation. Anatomical studies has identified four primary nerves responsible for clavicular sensation. They are superaclavicular nerve from the cervical plexus, nerve to subclavius, supra scapular nerve and long thoracic nerve from the brachial plexus.

SCUT that is supraclavicular and upper trunk blocks was developed to provide targeted anesthesia by selectively blocking the supraclavicular nerve and the upper trunk of brachial plexus. This study is prospective randomised double blinded controlled trial comparing the efficacy and safety of the SCUT block versus the conventional interscalene brachial plexus block in clavicle surgeries. The primary objective include evaluating postoperative pain score that is the visual analogue score and the incidence of diaphragmatic paralysis. While secondary objectives assess the opioid consumption that is the time fro the first opioid use and patient surgeon satisfaction. 

A total of 120 patients will be randomised into two groups

1. Group A.  SSCUT block with 10 ml of 0.5% ropivacaine will be administered under ultrasound guidance
2. Group B Interscalene and spra clavicular block using a larger volume of 20 to 30 ml of ropivacaine 

Pain scores will be recored at time points intra operatively and post operatively. Respiratory function will be assessed using ultrasound at 1 and 6 hours post block. Statistical analysis will compare visual analogue scores, opioid use, patient satisfaction and complication rates.

This study aims to establish the SCUT block as a safer and more effective alternative to interscalene brachial plexus block by reducing the risk of diaphragmatic paralysis while providing adequate analgesia for clavicle surgeries. 


 
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