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CTRI Number  CTRI/2025/09/094940 [Registered on: 16/09/2025] Trial Registered Prospectively
Last Modified On: 16/09/2025
Post Graduate Thesis  Yes 
Type of Trial  Interventional 
Type of Study   Drug
Surgical/Anesthesia
Preventive 
Study Design  Randomized, Parallel Group, Placebo Controlled Trial 
Public Title of Study   Comparison between intravenous Dexamethasone and intravenous Ondansetron for prevention of low blood pressure after spinal anesthesia in caesarean delivery among pregnant women 
Scientific Title of Study   Comparison between intravenous Dexamethasone and intravenous Ondansetron for prevention of post spinal hypotension in patients undergoing elective lower segment caesarean section : A 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  Shailendra Kumar 
Designation  Additional Professor 
Affiliation  AIIMS New Delhi 
Address  Room Number 4, Porta Cabin, 5th floor, Academic Building, Department of Anaesthesiology, Pain Medicine and Critical Care, 5th floor Academic block, AIIMS New Delhi

South
DELHI
110029
India 
Phone  8745027472  
Fax    
Email  drshail.kumar@gmail.com  
 
Details of Contact Person
Scientific Query
 
Name  Shailendra Kumar 
Designation  Additional Professor 
Affiliation  AIIMS New Delhi 
Address  Room Number 4, Porta Cabin, 5th floor, Academic Building, Department of Anaesthesiology, Pain Medicine and Critical Care, 5th floor Academic block, AIIMS New Delhi

South
DELHI
110029
India 
Phone  8745027472  
Fax    
Email  drshail.kumar@gmail.com  
 
Details of Contact Person
Public Query
 
Name  Indrani Das 
Designation  Junior Resident 
Affiliation  AIIMS New Delhi 
Address  Room number 5011, Anaesthesiology office, Department of Anaesthesiology, Pain Medicine and Critical Care, 5th floor academic block, AIIMS New Delhi

South
DELHI
110029
India 
Phone  9564618400  
Fax    
Email  indranimistu@gmail.com  
 
Source of Monetary or Material Support  
AIIMS, New Delhi 
 
Primary Sponsor  
Name  AIIMS New Delhi 
Address  Department of Anaesthesiology , Pain Medicine And Critical Care, AIIMS New Delhi,Ansari Nagar 110029 
Type of Sponsor  Research institution 
 
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 
DrShailendra Kumar  AIIMS New Delhi  Room No 4, Porta Cabin, 5th Floor, Academic Building, Department of Anaesthesiology, Pain Medicine and Critical Care,AIIMS New Delhi, 110029
South
DELHI 
8745027472

drshail.kumar@gmail.com 
 
Details of Ethics Committee  
No of Ethics Committees= 1  
Name of Committee  Approval Status 
Institute Ethics Committee, AIIMS New Delhi  Approved 
 
Regulatory Clearance Status from DCGI  
Status 
Not Applicable 
 
Health Condition / Problems Studied  
Health Type  Condition 
Patients  (1) ICD-10 Condition: O00-O9A||Pregnancy, childbirth and the puerperium,  
 
Intervention / Comparator Agent  
Type  Name  Details 
Comparator Agent  Inj 0.9% Normal saline 30 minutes prior to spinal anaesthesia  On the morning of surgery 10 ml of 0.9% normal saline will be given intravenously over 5 minutes in the study group C 30 minutes before spinal anaesthesia. 
Intervention  Intravenous Dexamethasone and intravenous Ondansetron 30 minutes prior to spinal anaesthesia  On the morning of surgery Inj Dexamethasone 8 mg diluted in 0.9% normal saline (total volume 10 ml) and inj Ondansetron 8 mg diluted in 0.9% normal saline (total volume 10 ml) will be given intravenously over 5 minutes in the study group A and B respectively 30 minutes before spinal anaesthesia. 
 
Inclusion Criteria  
Age From  18.00 Year(s)
Age To  45.00 Year(s)
Gender  Female 
Details  1. Pregnant women undergoing elective LSCS under Spinal anaesthesia
3. Singleton pregnancy
4. American society of anaesthesiologists physical status( ASA) 2
5. Gestational age more than 37 weeks
 
 
ExclusionCriteria 
Details  1. Gestational diabetes mellitus
2. Chronic diabetes mellitus
3. Hypertensive disorders of pregnancy
4. Cardiovascular insufficiency
5. BMI more than 40 kg/m2
6. Allergy to Dexamethasone or Ondansetron
7. Long QTsyndrome
8. Patients on long term steroid treatment
9. Any contraindication to spinal anaesthesia
10. Patient refusal
 
 
Method of Generating Random Sequence   Stratified randomization 
Method of Concealment   On-site computer system 
Blinding/Masking   Double Blind Double Dummy 
Primary Outcome  
Outcome  TimePoints 
To compare the incidence of post spinal hypotension between the study groups  • Systolic blood pressure will be recorded every 1 minutes till delivery  
 
Secondary Outcome  
Outcome  TimePoints 
1. To compare the number of boluses of Phenylephrine   
2. To compare incidence of post delivery hypotension  Systolic blood pressure will be measured every 5 minutes after delivery till the end of the surgery 
3. To compare the incidence of maternal bradycardia, nausea/vomiting, shivering   
4. To compare the neonatal outcome (APGAR Score, umbilical artery Ph, blood sugar   
5. Quality of recovery (QoR 15)  on the morning of surgery and 24 hours after surgery 
 
Target Sample Size   Total Sample Size="285"
Sample Size from India="285" 
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)   01/10/2025 
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="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   Sub arachnoid block is the preferred anaesthesia for elective LSCS as it has better maternal and fetal outcome as compared to general anaesthesia. Most common side effect of spinal anaesthesia is post spinal hypotension with an incidence ranging from 50 to 80 % in patients undergoing LSCS. Post spinal hypotension can lead to serious maternal as well as fetal compromise due to reduced umbillical blood flow prior to delivery. Hence it is necessary to address this condition. Various pharmacological and non pharmacological agents have been tried to prevent and treat post spinal hypotension with varying degrees of effectiveness. Dexamethasone is relatively newer agent and it has shown promising outcome in preventing post spinal hypotension during LSCS. But its exact efficacy is yet to be proven . Ondansetron is an established drug for prevention of post spinal hypotension. Therefore our study aims to compare the efficacy of intravenous Dexamethasone and Intravenous Ondansetron for prevention of post spinal hypotension in elective LSCS as Dexamethasone is comparatively safer alternative for pregnant women with respect to Ondansetron. 
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