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CTRI Number  CTRI/2025/02/081270 [Registered on: 25/02/2025] Trial Registered Prospectively
Last Modified On: 25/02/2025
Post Graduate Thesis  Yes 
Type of Trial  Interventional 
Type of Study   Surgical/Anesthesia 
Study Design  Randomized, Parallel Group, Multiple Arm Trial 
Public Title of Study   Comparing the Effect of 3 different types of nerve blocks - interscalene block,superior trunk block,combined infraclavicular and suprascapular nerve block on regional lung function in patients undergoing shoulder surgery  
Scientific Title of Study   Comparison of Interscalene Block ,Superior Trunk Block and Combined Infraclavicular and Suprascapular Block on Regional Lung Ventilation in Patients Undergoing Shoulder Surgery - Randomized controlled 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  Dr Ancy joy 
Designation  Junior Resident 
Affiliation  AIIMS Mangalagiri 
Address  Room No:1027,Department of Anaesthesia AIIMS Mangalagiri

Guntur
ANDHRA PRADESH
522503
India 
Phone  6238575123  
Fax    
Email  ancy.joy99@gmail.com  
 
Details of Contact Person
Scientific Query
 
Name  Dr Samarjit Dey 
Designation  Additional Professor 
Affiliation  AIIMS Mangalagiri 
Address  Department of Anaesthesia AIIMS Mangalagiri

Guntur
ANDHRA PRADESH
522503
India 
Phone  7805920791  
Fax    
Email  drsamarjit@aiimsmangalagiri.edu.in  
 
Details of Contact Person
Public Query
 
Name  Dr Ancy joy 
Designation  Junior Resident 
Affiliation  AIIMS Mangalagiri 
Address  Room No 1027, Department of Anaesthesia AIIMS Mangalagiri

Guntur
ANDHRA PRADESH
522503
India 
Phone  6238575123  
Fax    
Email  ancy.joy99@gmail.com  
 
Source of Monetary or Material Support  
AIIMS Mangalagiri,PIN:522503,GUNTUR ,ANDRA PRADESH, INDIA 
 
Primary Sponsor  
Name  AIIMS Mangalagiri 
Address  ALL INDIA INSTITUTE OF MEDICAL SCIENCES ,MANGALAGIRI,GUNTUR PIN:522503,ANDRA PRADESH ,INDIA 
Type of Sponsor  Government 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 Ancy joy  AIIMS Mangalagiri  Room no 1027,Department of Anaesthesia, AIIMS Mangalgiri ,guntur, mangalagiri
Guntur
ANDHRA PRADESH 
6238575123

ancy.joy99@gmail.com 
 
Details of Ethics Committee  
No of Ethics Committees= 1  
Name of Committee  Approval Status 
AIIMS Mangalagiri ,Institute Ethics Committee  Approved 
 
Regulatory Clearance Status from DCGI  
Status 
Not Applicable 
 
Health Condition / Problems Studied  
Health Type  Condition 
Patients  (1) ICD-10 Condition: M00-M99||Diseases of the musculoskeletal system and connective tissue,  
 
Intervention / Comparator Agent  
Type  Name  Details 
Intervention  Blocks given -interscalene block,superior trunk block,combined infraclavicular and suprascapular nerve block  Blocks given to the patients are randomised and each patient included in the study recieves the block as per the randomisation for a period of 1 year 
Comparator Agent  Comparing the effects on regional ventilation in interscalene block,superior trunk block , combined infraclavicular and suprascapular nerve block  comparing the effect on regional lung ventilation in interscalene , superior trunk and combined infraclavicular and suprascapular nerve block 
 
Inclusion Criteria  
Age From  18.00 Year(s)
Age To  65.00 Year(s)
Gender  Both 
Details  Patients of ASA 1-2 of age between 18 years to 65 years of both genders are included in this study 
 
ExclusionCriteria 
Details  patient refusal
patients of age less than 18 years and more than 65 years old
ASA PS- 3 and above
pre existing pulmonary disease
previous neck or infraclavicular/suprascapular fossa surgery
BMI more than 30kg/m2
contralateral phrenic nerve palsy
Obstructive Sleep Apnoea 
 
Method of Generating Random Sequence   Computer generated randomization 
Method of Concealment   Sequentially numbered, sealed, opaque envelopes 
Blinding/Masking   Participant and Investigator Blinded 
Primary Outcome  
Outcome  TimePoints 
To compare changes in regional lung ventilation and diaphragmatic excursion ratio in interscalene block, superior trunk block and combined infraclavicular brachial and suprascapular nerve block  T0-baseline
T1-1 hour after surgery 
 
Secondary Outcome  
Outcome  TimePoints 
To compare the incidence of hemi diaphragmatic palsy
To determine the correlation between regional lung ventilation and diaphragmatic excursion ratio
To compare numerical rating score on pain among these nerve blocks 
T0- baseline
T1- 1 hour after surgery 
 
Target Sample Size   Total Sample Size="103"
Sample Size from India="103" 
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   N/A 
Date of First Enrollment (India)   10/03/2025 
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="11"
Days="0" 
Recruitment Status of Trial (Global)   Not Yet Recruiting 
Recruitment Status of Trial (India)  Not Yet Recruiting 
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 anaesthesia has an established role in providing perioperative analgesia for shoulder surgeries. Interscalene block is considered as the gold standard analgesia ,but it holds a high risk of involving phrenic nerve (100%) and thereby hemi diaphragmatic palsy. It can increase morbidity in patients with pre existing respiratory diseases. Several alternatives to the Interscalene block have been proposed in order to avoid the effect on the diaphragm function ,which include Superior Trunk block, Combined Infraclavicular and Suprascapular Nerve block . The phrenic nerve lies in close proximity to the brachial plexus and diverge as it descends over the anterior scalene muscle and as it approaches the root of the neck ,the phrenic nerve usually lies between the subclavian artery and vein , before coursing medially in front of the Internal thoracic artery . Incidence of  phrenic nerve involvement in Superior Trunk block and Combined Infraclavicular and Suprascapular Nerve block ranges between 25 - 76.3% and 6 % respectively. Even though the involvement of phrenic nerve is studied, its influence on respiratory parameters such as regional lung ventilation  is not studied much in any other studies conducted before about these blocks. Electrical Impedence Tomograph is one of the recent lung imaging technique that can provide dynamic information on distribution of regional lung ventilation . EIT possess high temporal and functional resolution allowing the visualisation of dynamic physiological and pathological changes on a breath to breath basis. EIT detect changes in electrical impedence   (i.e changes in gas/fluid ratio ) and describes them in real time,  both visually through images and waveforms and numerically allowing the clinician to monitor the disease evolution .In this we are comparing the effect of Interscalene block, Superior Trunk block and Combined Infraclavicular Brachial and Suprascapular nerve block on regional lung ventilation by using Electrical Impedence Tomograph. 
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