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CTRI Number  CTRI/2024/08/071875 [Registered on: 02/08/2024] Trial Registered Prospectively
Last Modified On: 30/09/2025
Post Graduate Thesis  No 
Type of Trial  Interventional 
Type of Study   Diagnostic 
Study Design  Non-randomized, Placebo Controlled Trial 
Public Title of Study   Evaluation of brain connections in patients suffering from facial pain 
Scientific Title of Study   Evaluation of the brain functional connectivity networks using functional near infrared spectroscopy (fNIRS) in patients with trigeminal neuralgia 
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 Sonia Bansal 
Designation  Additional Professor 
Affiliation  NIMHANS 
Address  Department of Neuroanaesthesia and Neurocritical Care, 3rd floor, Faculty Block, Neurocentre, NIMHANS (near Bangalore Milk Dairy), Bengaluru 560029

Bangalore
KARNATAKA
560029
India 
Phone  09008721921  
Fax    
Email  itz.sonia77@gmail.com  
 
Details of Contact Person
Scientific Query
 
Name  Dr Sonia Bansal 
Designation  Additional Professor 
Affiliation  NIMHANS 
Address  Department of Neuroanaesthesia and Neurocritical Care, 3rd floor, Faculty Block, Neurocentre, NIMHANS (near Bangalore Milk Dairy), Bengaluru 560029

Bangalore
KARNATAKA
560029
India 
Phone  09008721921  
Fax    
Email  itz.sonia77@gmail.com  
 
Details of Contact Person
Public Query
 
Name  Dr Sonia Bansal 
Designation  Additional Professor 
Affiliation  NIMHANS 
Address  Department of Neuroanaesthesia and Neurocritical Care, 3rd floor, Faculty Block, Neurocentre, NIMHANS (near Bangalore Milk Dairy), Bengaluru 560029

Bangalore
KARNATAKA
560029
India 
Phone  09008721921  
Fax    
Email  itz.sonia77@gmail.com  
 
Source of Monetary or Material Support  
National Institute of Mental Health and Neurosciences (NIMHANS), Near Dairy circle, Hosur Road, Bengaluru 560029, INDIA 
 
Primary Sponsor  
Name  National Institute of Mental Health and Neurosciences (NIMHANS) 
Address  Hosur road, Nar Bangalore milk dairy, Bengaluru-560029 
Type of Sponsor  Research institution and hospital 
 
Details of Secondary Sponsor  
Name  Address 
NIL  Not applicable 
 
Countries of Recruitment     India  
Sites of Study  
No of Sites = 1  
Name of Principal Investigator  Name of Site  Site Address  Phone/Fax/Email 
Dr Sonia Bansal  National Institute of Mental Health and Neurosciences (NIMHANS)  Department of Neuroanaesthesia and Neurocritical Care, 3rd floor, Faculty Block, Neurocentre, NIMHANS (near Bangalore Milk Dairy), Bengaluru 560029
Bangalore
KARNATAKA 
09008721921

itz.sonia77@gmail.com 
 
Details of Ethics Committee
Modification(s)  
No of Ethics Committees= 1  
Name of Committee  Approval Status 
InstituteEthicsCommitteeBSNS  Approved 
 
Regulatory Clearance Status from DCGI  
Status 
Not Applicable 
 
Health Condition / Problems Studied  
Health Type  Condition 
Healthy Human Volunteers  Brain connectivity patterns will be compared between patients of Trigeminal Neuralgia and healthy volunteers aged 35-60 years, of both sexes 
Patients  (1) ICD-10 Condition: G500||Trigeminal neuralgia,  
 
Intervention / Comparator Agent  
Type  Name  Details 
Intervention  Assessment of anxiety and depression using HADS  will be performed at OPD visit and after RFA at the follow up visit (4-6 weeks later) if they undergo RFA. It will take about 5 min for each assessment.  
Intervention  Assessment of QoL using European Quality of Life – 5D-5L dimension  Will be performed at OPD visit and after RFA at the follow up visit (4-6 weeks later) if they undergo RFA. It will take about 5 min for each assessment.  
Intervention  fNIRS   fNIRS recording of 5-10 minutes will be performed for volunteers (at any convenient time, resting state) and for patients with TN at OPD visit (in the resting state and with pain in patients with TN if spontaneous pain occurs). FNIRS will be repeated in patients with TN if they undergo RFA, at the follow up visit (4-6 weeks later)  
Intervention  Heart rate varaiability  HRV for 5 minutes: will be performed for patients undergoing RFA (just before RFA in Operation theatre) and after RFA at the follow up visit (4-6 weeks later) 
Intervention  Richards-Campbell Sleep Questionnaire  Will be performed at OPD visit and after RFA at the follow up visit (4-6 weeks later) if they undergo RFA. It will take about 5 min for each assessment.  
 
Inclusion Criteria  
Age From  35.00 Year(s)
Age To  60.00 Year(s)
Gender  Both 
Details  Inclusion criteria for patients with Trigeminal Neuralgia (TN):
Patients with diagnosis of TN with significant pain, i.e., Barrow Neurological Institute scale score (BNI) of 4 and 5) and giving consent for functional near infrared spectroscopy (fNIRS) and heart rate variability (HRV) recordings.
Patients who are likely to undergo radiofrequency ablation (RFA) and are unwilling for surgery for treatment of TN, (when patients are refractory to medical management by atleast 2 drugs of optimal dose or developed side effects to drugs) in future, will be recruited in to the study.
Inclusion criteria for controls: Age and gender matched volunteers, aged 35-60 years of both sexes will be included as controls.  
 
ExclusionCriteria 
Details  Exclusion criteria: Absence of patient consent, inability to perform fNIRS or HRV studies, patients who are likely to undergo surgery or gamma knife radiosurgery for treatment of TN if pain persists.
For controls: Volunteers with any type of chronic pain or if they are on any medications which can modulate the brain connectivity patterns will be excluded.


 
 
Method of Generating Random Sequence   Not Applicable 
Method of Concealment   Not Applicable 
Blinding/Masking   Not Applicable 
Primary Outcome  
Outcome  TimePoints 
Brain activity and functional connectivity networks at resting state.  At visit to pain clinic 
 
Secondary Outcome  
Outcome  TimePoints 
1. Brain functional connectivity networks in patients with TN during spontaneously evoked pain states.
2. Change in functional connectivity networks in patients with TN before and after RFA.
3. Change in HRV (as a measure of Autonomic dysfunction) in patients of TN before and after RFA.
4. The quality of life [QOL] (using EQ-5D5L questionnaire), anxiety, depression (using Hospital Anxiety and Depression Scale [HADS]) and quality of sleep using Richard Campbell sleep questionnaire, in patients with TN before and after RFA.

 
1. At OPD visit to pain clinic
2, 3 and 4: Before RFA and 4-6 weeks after RFA
 
 
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)   15/08/2024 
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="3"
Months="0"
Days="0" 
Recruitment Status of Trial (Global)   Not Yet Recruiting 
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  
For the primary objective of the study, the baseline fNIRS of healthy volunteers and patients with TN having NRS/BNI > 4 will be compared at rest. While recording fNIRS in patients with TN, spontaneous pain may get elicited due to touching the face or by talking or cold breeze. We will record this data as fNIRS during pain. Over a period of time, with disease progression, these patients may require intervention in the form of RFA. We will perform fNIRS for these patients after RFA when they come for follow up. 
Prior to RFA, a 5-minute recording of HRV will be performed at resting condition. HRV will be repeated post-RFA when patients come for follow up. The QOL, sleep and HADS will be assessed at the same time points as HRV. 
Data Collection (from medical records): 
Demographics: Age and gender.
History: duration of TN, distribution of pain, side affected, description of the type of pain, number of episodes of pain/day, BNI score, NRS score, medications received by the patients, any history of autonomic symptoms (sweating, diarrhea/constipation, tearing in the eyes etc.), triggers of pain 
Before and after RFA (i.e., 4-6 weeks after RFA): 
Assessment of QoL using European Quality of Life – 5D-5L dimension scale 
Assessment of sleep quality using Sleep using Richards-Campbell Sleep Questionnaire 
Assessment of anxiety and depression using HADS 
MRI findings

 
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