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CTRI Number  CTRI/2026/02/104511 [Registered on: 23/02/2026] Trial Registered Prospectively
Last Modified On: 15/02/2026
Post Graduate Thesis  Yes 
Type of Trial  Interventional 
Type of Study   Surgical/Anesthesia 
Study Design  Randomized, Parallel Group, Active Controlled Trial 
Public Title of Study   COMPARING TWO DIFFERENT PROCEDURES OF CHRONIC FISSURE IN ANO 
Scientific Title of Study   Randomized control trial on unilateral vs bilateral lateral internal sphincterotomy in a case of chronic fissure in ano 
Trial Acronym  NIL 
Secondary IDs if Any  
Secondary ID  Identifier 
NIL  NIL 
 
Details of Principal Investigator or overall Trial Coordinator (multi-center study)  
Name  Muthamizh S 
Designation  Surgery Resident 
Affiliation  AFMC, Pune 
Address  B1/13 Maple tower society, Wanowrie
Dept of general surgery, AFMC,wanowrie, Pune
Pune
MAHARASHTRA
411040
India 
Phone  9445874179  
Fax    
Email  muthamizh44@gmail.com  
 
Details of Contact Person
Scientific Query
 
Name  Dr Animesh vatsa 
Designation  Professor 
Affiliation  AFMC, Pune 
Address  Dept of general surgery, AFMC. Wannourie
Dept of general surgery, AFMC. Wannourie
Pune
MAHARASHTRA
411040
India 
Phone  9560495765  
Fax    
Email  animeshvats@gmail.com  
 
Details of Contact Person
Public Query
 
Name  Dr Animesh vatsa 
Designation  Professor 
Affiliation  AFMC, Pune 
Address  Dept of general surgery, wannourie.
Dept of general surgery, wannourie.
Pune
MAHARASHTRA
411040
India 
Phone  9560495765  
Fax    
Email  animeshvats@gmail.com  
 
Source of Monetary or Material Support  
AFMC, Dept of general surgery, wannorie, pune. 411040 
 
Primary Sponsor  
Name  Armed forces medical college 
Address  Dept of general surgery, wannourie.411040 
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 Muthamizh S  Armed forces medical college  Department of general surgery, AFMC, Wanowrie, Pune. 411040 Maharastra
Pune
MAHARASHTRA 
09445874179

muthamizh44@gmail.com 
 
Details of Ethics Committee  
No of Ethics Committees= 1  
Name of Committee  Approval Status 
Institutional Ethical Commitee, AFMC, Pune  Approved 
 
Regulatory Clearance Status from DCGI  
Status 
Not Applicable 
 
Health Condition / Problems Studied  
Health Type  Condition 
Patients  (1) ICD-10 Condition: O||Medical and Surgical,  
 
Intervention / Comparator Agent  
Type  Name  Details 
Comparator Agent  Lateral internal sphicterotomy  uNILATERAL LIS at 3clk 
Intervention  Lateral internal sphincterotomy bilaterally  Bilateral LIS at 3clk and 9 clk 
 
Inclusion Criteria  
Age From  18.00 Year(s)
Age To  60.00 Year(s)
Gender  Both 
Details  All the patients of chronic fissure in Ano for more than 3 months
recurrence in already optd LIS patients
IBD 
 
ExclusionCriteria 
Details  any previous history of rectal and perianal surgeries
Patient with associated complaints of hemarrhoids, fistula in Ano, anal polyp and anorectal prolapse 
 
Method of Generating Random Sequence   Other 
Method of Concealment   An Open list of random numbers 
Blinding/Masking   Participant Blinded 
Primary Outcome  
Outcome  TimePoints 
To compare the recurrence rate  03 months 
 
Secondary Outcome  
Outcome  TimePoints 
to compare quality of life, post op pain & incontinence  3 months 
 
Target Sample Size   Total Sample Size="160"
Sample Size from India="160" 
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 2/ Phase 3 
Date of First Enrollment (India)   15/03/2026 
Date of Study Completion (India) Applicable only for Completed/Terminated trials 
Date of First Enrollment (Global)  15/03/2026 
Date of Study Completion (Global) Applicable only for Completed/Terminated trials 
Estimated Duration of Trial   Years="2"
Months="0"
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   Gold standard treatment for chronic anal fissure is LIS, which is usually performed at single location, this study compares unilateral vs bilateral open LIS. Anal fissure is a painful linear mucosal tear situated in distal anal canal just below dentate line to anal verge, affects all ages and both sexes. Patient characteristically presently with pain, brigh red bleeding, mucosal discharge and constipation. Injury to anal mucosa by hard stools is the initiating event in the developement of fissure. Fissures classified into acute and chronic and into primary and secondary based on the pathogenesis. Chronicity criteria is duration of symptoms more than 8 weeks, presence of sentinal tag or ulcer with exposed internal sphincter. Aim is to reduce the sphicter tone which in turn increases vascularity, with medical (GTN, CCB, BOTULINUM TOXIN)  or surgical intervention(LIS). 
Internal sphincter is formed by circular muscle fibers, dividing it at one point of the circle relaxes the tone of the sphincter, which is the rationale for doing unilateral LIS. Dividing the sphicter, which is rationale for doing unilateral LIS. Dividing the sphincter at two places relaxes the sphicter effectively and helps in healing faster and recovery. However risk of incontinence may increase.
 
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