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CTRI Number  CTRI/2025/10/096430 [Registered on: 23/10/2025] Trial Registered Prospectively
Last Modified On: 09/10/2025
Post Graduate Thesis  Yes 
Type of Trial  Observational 
Type of Study   Cross Sectional Study 
Study Design  Single Arm Study 
Public Title of Study   How long does Morphine, when given as a part of anesthesia into the back, help with Pain after delivery of baby through surgery? 
Scientific Title of Study   Prospective observational study to assess the duration of postoperative analgesia in patients undergoing elective lower segment caesarean section under spinal anesthesia with Morphine 
Trial Acronym  NIL 
Secondary IDs if Any  
Secondary ID  Identifier 
NIL  NIL 
 
Details of Principal Investigator or overall Trial Coordinator (multi-center study)  
Name  SamCharles 
Designation  Junior Resident 
Affiliation  Christian Medical College, Vellore 
Address  SamCharles, Office, Department of Anesthesia, 7th Floor Paul Brand Block, CMC, Vellore
Christian Medical College Vellore, Ida Scudder Road, Vellore – 632004 Tamil Nadu, India
Vellore
TAMIL NADU
632002
India 
Phone  7639789452  
Fax    
Email  samcharles.d.pg@cmcvellore.ac.in  
 
Details of Contact Person
Scientific Query
 
Name  Smithamol P.B 
Designation  Associate professor  
Affiliation  Christian Medical College, Vellore 
Address  Smithamol P.B, Associate Professor, Office, Department of Anaesthesia, 7th floor, Paul Brand Block CMC, Vellore
Christian Medical College Vellore, Ida Scudder Road, Vellore – 632004 Tamil Nadu, India
Vellore
TAMIL NADU
632002
India 
Phone  8940320069  
Fax    
Email  smithamolpb@gmail.com  
 
Details of Contact Person
Public Query
 
Name  SamCharles 
Designation  Junior Resident 
Affiliation  Christian Medical College, Vellore 
Address  SamCharles, Office, Department of Anesthesia, 7th Floor Paul Brand Block, CMC, Vellore
Christian Medical College Vellore, Ida Scudder Road, Vellore – 632004 Tamil Nadu, India
Vellore
TAMIL NADU
632002
India 
Phone  7639789452  
Fax    
Email  samcharles.d.pg@cmcvellore.ac.in  
 
Source of Monetary or Material Support  
Internal Fluid Fund, Christian Medical College, Vellore 
 
Primary Sponsor  
Name  Christian Medical College 
Address  Christian Medical College Vellore, Ida Scudder Road, Vellore – 632004 Tamil Nadu, India 
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 
SamCharles  Christian Medical College  Unit 3, unit 4 and unit 5 of the department of Obstetrics and Gynaecology, Christian Medical College Vellore, Ida Scudder Road, Vellore – 632004 Tamil Nadu, India
Vellore
TAMIL NADU 
7639789452

samcharles.d.pg@cmcvellore.ac.in 
 
Details of Ethics Committee  
No of Ethics Committees= 1  
Name of Committee  Approval Status 
Institutional Review Board  Approved 
 
Regulatory Clearance Status from DCGI  
Status 
Not Applicable 
 
Health Condition / Problems Studied  
Health Type  Condition 
Patients  (1) ICD-10 Condition: O82||Encounter for cesarean delivery without indication,  
 
Intervention / Comparator Agent  
Type  Name  Details 
Intervention  Nil  Nil 
 
Inclusion Criteria  
Age From  20.00 Year(s)
Age To  40.00 Year(s)
Gender  Female 
Details  ASA physical status 2 singleton pregnant mothers over 145 cm in height with no comorbidities or well-controlled comorbidities with normal placentation, undergoing elective lower segment caesarean section at full term 
 
ExclusionCriteria 
Details  Mothers with high-risk pregnancy, multiple pregnancy, or uncontrolled comorbidities. Mothers who undergo lower segment caesarean section under general anesthesia, or those who have failed spinal anesthesia. Mothers who have chronic pain syndrome, allergy to opioids, fetal or placental anomalies. Mothers undergoing preterm or post-term caesarean delivery. Mothers who have postpartum hemorrhage and those who received additives other than morphine 100mcg 
 
Method of Generating Random Sequence   Not Applicable 
Method of Concealment   Not Applicable 
Blinding/Masking   Not Applicable 
Primary Outcome  
Outcome  TimePoints 
Duration of analgesia post intrathecal Morphine as indicated by duration to first patient requested analgesia is the primary outcome.   Duration of analgesia post intrathecal Morphine as indicated by duration to first patient requested analgesia is the primary outcome.  
 
Secondary Outcome  
Outcome  TimePoints 
Incidence of respiratory depression defined as respiratory rate less than 10  immediate post operative period  
Incidence of sedation as described by RASS sedation scale  Immediate post operative period 
Incidence of post operative nausea and vomiting  48 hours post operatively 
Incidence of post operative pruritus  48 hours after intrathecal morphine administration 
Duration to flatus  Time from intrathecal morphine administration to passing flatus first 
 
Target Sample Size   Total Sample Size="194"
Sample Size from India="194" 
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)   25/10/2025 
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="0"
Days="0" 
Recruitment Status of Trial (Global)   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  

Moderate to severe postoperative pain is experienced by women undergoing lower-segment caesarean section. Intrathecal Morphine is proposed as the gold standard for postoperative pain relief in patients undergoing LSCS. It is a part of multimodal analgesia in the Enhanced Recovery After Surgery (ERAS) pathway. The duration of analgesia provided varies between 20 and 48 hours in different populations, with an average of 9.4 hours. This study primarily aims to determine the duration to the first analgesia requirement after LSCS when spinal anesthesia is provided with intrathecal Morphine. Pain score, as described by the Visual Analog Scale, at which the patient requested additional analgesia, will also be recorded.

 
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