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CTRI Number  CTRI/2024/02/062601 [Registered on: 13/02/2024] Trial Registered Prospectively
Last Modified On: 31/01/2024
Post Graduate Thesis  Yes 
Type of Trial  Interventional 
Type of Study   Drug 
Study Design  Randomized, Parallel Group, Placebo Controlled Trial 
Public Title of Study   The effect of ondansetron which is a drug used to treat vomiting, on spinal anaesthesia induced fall in blood pressure. 
Scientific Title of Study   Effect of ondansetron on spinal anesthesia induced hypotension 
Trial Acronym  NIL 
Secondary IDs if Any  
Secondary ID  Identifier 
NIL  NIL 
 
Details of Principal Investigator or overall Trial Coordinator (multi-center study)  
Name  Fazil H 
Designation  MD Resident 
Affiliation  Amrita Institute of Medical Sciences 
Address  Department Of Anesthesiology Amrita Vishwa Vidyapeetham Health Sciences Campus Amrita Institute of Medical Sciences Elamakkara P.O. Kochi - 682 041 Kerala, India

Ernakulam
KERALA
682041
India 
Phone  9072239462  
Fax    
Email  fazilhaleel@gmail.com  
 
Details of Contact Person
Scientific Query
 
Name  Rajesh K 
Designation  Associate professor 
Affiliation  Amrita Institute of Medical Sciences 
Address  Department Of Anesthesiology Amrita Vishwa Vidyapeetham Health Sciences Campus Amrita Institute of Medical Sciences Elamakkara P.O. Kochi - 682 041 Kerala, India

Ernakulam
KERALA
682041
India 
Phone  9847162134  
Fax    
Email  rajgokulam70@gmail.com  
 
Details of Contact Person
Public Query
 
Name  Fazil H 
Designation  MD Resident 
Affiliation  Amrita Institute Of Medical Sciences 
Address  Department Of Anesthesiology Amrita Vishwa Vidyapeetham Health Sciences Campus Amrita Institute of Medical Sciences Elamakkara P.O. Kochi - 682 041 Kerala, India

Ernakulam
KERALA
682041
India 
Phone  9072239462  
Fax    
Email  fazilhaleel@gmail.com  
 
Source of Monetary or Material Support  
Amrita Institute of Medical Sciences 
 
Primary Sponsor  
Name  Amrita Institute Of Medical Sciences 
Address  Amrita Vishwa Vidyapeetham Health Sciences Campus Amrita Institute of Medical Sciences Elamakkara P.O. Kochi - 682 041 Kerala, 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 
DrFazil H  Amrita Institute of Medical Sciences  Department of anesthesiology Amrita Institute of Medical Sciences Elamakkara P.O. Kochi - 682 041 Kerala, India
Ernakulam
KERALA 
9072239462

fazilhaleel@gmail.com 
 
Details of Ethics Committee  
No of Ethics Committees= 1  
Name of Committee  Approval Status 
Amrita Institute Of Medical Sciences  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  Normal saline  For patients in the camparitor group single dose of normal saline 4 ml will be given intravenously 
Intervention  Ondansetron   Single shot ondansetron will be give ten minutes before spinal anesthesia at a dose of 0.1mg/kg maximum of eight milligram intravenously. 
 
Inclusion Criteria  
Age From  20.00 Year(s)
Age To  70.00 Year(s)
Gender  Both 
Details  ASA physical status 1 to 3 
 
ExclusionCriteria 
Details  1.Contraindication or a history of hypersensitivity to ONDANSETRON
2.Obstretric surgeries
3.Uncontrolled hypertension
4.Localized infection at the puncture site and patients with coagulopathies.
 
 
Method of Generating Random Sequence   Computer generated randomization 
Method of Concealment   Sequentially numbered, sealed, opaque envelopes 
Blinding/Masking   Participant and Investigator Blinded 
Primary Outcome  
Outcome  TimePoints 
To compare the incidence of hypotension (fall in mean arterial pressure more than 20% in the baseline values) between test and control groups.  Immediately after spinal, at 5 min, 10 min, 15 min,30 min and every 30 min till end of surgery 
 
Secondary Outcome  
Outcome  TimePoints 
To find the recquirement for inotrops to treat hypotension
To find the usage of atropine and glycopyrrolate to treat bradycardia 
Before spinal after spinal,1 min after spinal 3 minutes after spinal,5 minutes after spinal ,10minutes after spinal,15 mintues after spinal 30mintues after spinal,every 30 min till surgery ends. 
 
Target Sample Size   Total Sample Size="150"
Sample Size from India="150" 
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 3 
Date of First Enrollment (India)   13/02/2024 
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="0"
Months="3"
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  

Hypotension and bradycardia are the common side effects seen after spinal anesthesia. Multiple strategies are tested to prevent the post spinal anesthesia induced hypotension. Recently, ondansetron, a 5-HT3 antagonist commonly used as an antiemetic was found to be effective in preventing spinal anesthesia induced hypotension. The aim of this study is to evaluate the effect of ondansetron in the prevention of spinal anesthesia induced hypotension 

Following spinal anesthesia, hypotension results mainly from a decrease in systemic vascular resistance secondary to a blockage of sympathetic fibers and an increase in vagal tone. This reduction in venous return can trigger the Von Bezold-Jarisch (BJ) reflex, mediated by serotonin receptors (subtype 5-HT3), resulting in increased efferent vagal signaling and bradycardia, ultimately exacerbating hypotension

Ondansetron is a drug employed as prophylaxis for Postoperative Nausea and Vomiting (PONV), whose antiemetic activity involves the selective inhibition of the 5-HT3 receptors. As a result, ondansetron can suppress the BJ reflex, and it has been postulated as a therapeutic strategy to prevent hypotension in patients undergoing spinal anesthesia Patients will be randomized using computer generated random sequence of numbers. On the day of surgery patient will be shifted to OT and all standard monitors would be attached. Peripheral IV line will be inserted. All the patients were preloaded with 500 mL of lactated Ringer’s solution IV. Patient’s peripheral oxygen saturation, blood pressure(systolic, diastolic, and mean arterial pressure), and electrocardiogram will be monitored. Basal values will be recorded. Group A- received 0.1mg/kg max upto 8mg ondansetron intravenously (IV) 10 min before spinal anesthesia. Group B- received 4 mL saline IV 10 min before spinal anesthesia The patients were placed in lying down lateral position, and dural puncture was performed at L3–L4 interspace under full aseptic precautions. A total volume of 15 mg of 0.5% hyperbaric bupivacaine was injected intrathecally and adjuvant opiods(fentanyl) at the discretion of the anesthesiologist. Supine position was adopted after the administration of spinal anesthesia. Parameters such as age, sex,height, weight, surgery timing and amount of iv fluids given would be included and level of spinal block The primary outcome was the proportion of patients with hypotension during surgery. Hypotension was defined as mean arterial pressure(MAP) below 20% of initial value. Secondary outcomes included the proportion of patients with bradycardia, vasopressors usage, and variations in blood pressure and Heart Rate (HR). Baseline Systolic Blood PressureDiastolic Blood Pressure Mean
Arterial Pressure Heart Rate values will be recorded, as well as after anxiolysis, 5 minutes, 10 minutes, 15 minutes, 20 minutes, 30 minutes after spinal anaesthesia and every 30 min till the end of surgery. Incidence of nausea and vomiting until shift from icu, fluid requirement ,level of spinal blockage were
also noted. Care was also taken so that the surgeries are similar.
 
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