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CTRI Number  CTRI/2025/08/092617 [Registered on: 07/08/2025] Trial Registered Prospectively
Last Modified On: 01/08/2025
Post Graduate Thesis  Yes 
Type of Trial  Interventional 
Type of Study   Other (Specify) [Regional Block in Emergency Medicine Department]  
Study Design  Randomized, Parallel Group Trial 
Public Title of Study   A pilot study comparing a nerve block (ESPB) and Fentanyl for treating patients with severe back pain in the Emergency Department. 
Scientific Title of Study   Efficacy of the Erector Spinae Plane Block (ESPB) versus Fentanyl for alleviating pain in patients with acute severe backache in the Emergency Department: a comparative parallel-group two-arm open label pilot 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  Dr Abhisek Nayak 
Designation  Junior Resident 
Affiliation  All India Institute of Medical Sciences, New Delhi 
Address  Department Of Emergency Medicine, All India Institute of Medical Sciences, Ansari Nagar, New Delhi

South
DELHI
110029
India 
Phone  6370238947  
Fax    
Email  abhisekn89@gmail.com  
 
Details of Contact Person
Scientific Query
 
Name  Dr Sanjeev Bhoi 
Designation  Professor 
Affiliation  All India Institute of Medical Sciences, New Delhi 
Address  Room - 129, JPNATC, Department Of Emergency Medicine, All India Institute of Medical Sciences, New Delhi

South
DELHI
110029
India 
Phone  8527050391  
Fax    
Email  sanjeevbhoi@gmail.com  
 
Details of Contact Person
Public Query
 
Name  Dr Sanjeev Bhoi 
Designation  Professor 
Affiliation  All India Institute of Medical Sciences, New Delhi 
Address  Room - 129, JPNATC, Department Of Emergency Medicine, All India Institute of Medical Sciences, New Delhi

South
DELHI
110029
India 
Phone  8527050391  
Fax    
Email  sanjeevbhoi@gmail.com  
 
Source of Monetary or Material Support  
All India Institute of Medical Sciences, Ansari Nagar, New Delhi, 110029 
 
Primary Sponsor  
Name  All India Institute of Medical Sciences, New Delhi 
Address  Department Of Emergency Medicine, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, 110029 
Type of Sponsor  Research institution and hospital 
 
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 Abhisek Nayak  AIIMS, New Delhi  Department Of Emergency Medicine and Trauma Centre, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, 110029
South
DELHI 
6370238947

abhisekn89@gmail.com 
 
Details of Ethics Committee  
No of Ethics Committees= 1  
Name of Committee  Approval Status 
INSTITUTE ETHICS COMMITTEE FOR POSTGRADUATE RESEARCH, AIIMS, NEW DELHI  Approved 
 
Regulatory Clearance Status from DCGI  
Status 
Not Applicable 
 
Health Condition / Problems Studied  
Health Type  Condition 
Patients  (1) ICD-10 Condition: M545||Low back pain,  
 
Intervention / Comparator Agent  
Type  Name  Details 
Intervention  Erector Spinae Plane Block (ESPB)  The patient will be positioned in their comfortable posture (sitting, recumbent, lateral rotation). The site for block will depend upon patient’s presentation. For patients with localized pain and tenderness, block will be given at that site. But for patients with diffuse pain with or without tenderness, block will be given bilaterally. The target spinous process is the vertebrae located at the site of maximum pain or tenderness for providing adequate analgesia. Target process will be identified by counting the vertebrae from C7 spine, which is the most prominent vertebrae. LA will be injected at the site of maximum pain or tenderness. The ultrasound transducer will be placed in a longitudinal parasagittal fashion, 3 cm lateral to the target spinous processes, which allows for the visualization of adjacent transverse processes (TP) in an in-plane approach. After the identification of correct TP, that is the transverse process of the vertebrae pertaining to the site of maximum pain or tenderness, a subcutaneous bleb (26 gauze needle) will be formed by infiltrating local anaesthesia for portal of entry of the needle. An 18-gauge echogenic needle will be inserted using an in-plane technique, and cranio-caudad approach will be used to contact the TP with the tip of the needle deep to the fascial plane of the erector spinae muscle. Needle placement will be confirmed by hydro-dissection of the muscle planes on injecting 10 ml of normal saline. Then, calculated amount of 2% lidocaine of 4.5mg/kg, 0.25% Bupivacaine of 1mg/kg and 4mg Dexamethasone will be injected into the fascial plane deep to erector spinae muscle. This solution will be diluted with normal saline so that the volume injected on each site will be at least 20ml. After the intervention, a patient-controlled analgesia pump or PCA pump will be provided which will contain injection Fentanyl as rescue therapy. Patient will be asked to press the PCA pump button whenever he/she feels pain, a predetermined amount of fentanyl will be delivered. The demand dose for fentanyl will be 0.3 mcg/kg with a lockout interval of 15 minutes and a 1-hour limit of 1.2 mcg/kg. This meant that the pump will deliver fentanyl only after 15 minutes of the last dose even if a patient presses the button repeatedly. 
Comparator Agent  Fentanyl  In Fentanyl arm patient will be given injection Fentanyl 1 mcg/kg IV stat. After the intervention, a patient-controlled analgesia pump or PCA pump will be provided which will contain injection Fentanyl as rescue therapy. Patient will be asked to press the PCA pump button whenever he/she feels pain, a predetermined amount of fentanyl will be delivered. The demand dose for fentanyl will be 0.3 mcg/kg with a lockout interval of 15 minutes and a 1-hour limit of 1.2 mcg/kg. This meant that the pump will deliver fentanyl only after 15 minutes of the last dose even if a patient presses the button repeatedly. 
 
Inclusion Criteria  
Age From  18.00 Year(s)
Age To  99.00 Year(s)
Gender  Both 
Details  1. Age 18 years or older
2. Acute severe lumbar back pain
3. DVPRS score of 7 or more
 
 
ExclusionCriteria 
Details  1. Symptoms of cauda equina syndrome
2. Progressive neurologic symptoms
3. Abdominal Aorta Aneurysm
4. Vertebral fracture
5. Evidence of skin/soft tissue infection at the block site
6. Spine deformity (both acquired or congenital)
7. Known Bleeding Disorder
8. Unwillingness to participate
9. Allergy to any of the research medications
10. Pregnancy
11. Patients of Chronic liver disease, Chronic kidney Disease, Congestive heart failure
12. Immunocompromised patients
13. Hemodynamically unstable patients
 
 
Method of Generating Random Sequence   Permuted block randomization, variable 
Method of Concealment   Sequentially numbered, sealed, opaque envelopes 
Blinding/Masking   Open Label 
Primary Outcome  
Outcome  TimePoints 
To assess the efficacy of successful pain relief after six hours of intervention in both ESPB arm and Fentanyl arm  30 minutes, 1 hour, 2 hours, 6 hours 
 
Secondary Outcome  
Outcome  TimePoints 
To study safety of ESPB in comparison to Fentanyl at 6 hours  6 hours 
To evaluate patient satisfaction among patient groups receiving ESPB versus Fentanyl in terms of reduction of pain in Likert scale (from 0: ‘‘Very unsatisfied¨ to 5: ‘‘very satisfied¨)  6 hours 
To assess the amount of rescue analgesic medications required at 6 hours of intervention  6 hours 
 
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   N/A 
Date of First Enrollment (India)   01/09/2025 
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="1"
Months="6"
Days="0" 
Recruitment Status of Trial (Global)   Not Applicable 
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   This study is designed as a comparative parallel group, two arm, open label, pilot randomized control trial to evaluate the efficacy of the Erector Spinae Plane Block versus Fentanyl in managing acute severe backache in patients presenting to the Emergency Department. Eligible participants include individuals aged 18 years or older who present with acute severe lumbar back pain, whether due to mechanical causes, malignancy related pain or trauma after excluding vertebral fractures. Each patient will undergo a thorough history taking and clinical examination. Those who are hemodynamically stable, have no known allergies to the study drugs and score of 7 or more on Defence and Veteran Pain Rating Scale will be enrolled, provided they meet all the inclusion criteria and no exclusion criteria apply. Randomization will be conducted using preformed, computer generated sequences employing a mixed block randomization method. To maintain allocation concealment, the generated sequences will be sealed in opaque envelopes. The primary objective is to evaluate the effectiveness of pain relief achieved six hours post intervention in both the ESPB and Fentanyl arms. The secondary objectives include assessing the safety profile, patient satisfaction and the quantity of rescue analgesic medications required within six hours post intervention, comparing outcomes between the intervention and control groups. 
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