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CTRI Number  CTRI/2025/07/092068 [Registered on: 31/07/2025] Trial Registered Prospectively
Last Modified On: 30/04/2026
Post Graduate Thesis  Yes 
Type of Trial  Observational 
Type of Study   Prospective observational study 
Study Design  Other 
Public Title of Study   Evaluating the changes in tracheal cuff pressure in patients undergoing percutaneous nephrolithotomy procedure under general anesthesia in prone position and to correlate it with postoperative sore throat 
Scientific Title of Study   Evaluation of changes in tracheal cuff pressure in patients undergoing percutaneois nephrolithotomy in prone position and its correlation with sore throat a prospective observational study 
Trial Acronym  NIL 
Secondary IDs if Any  
Secondary ID  Identifier 
NIL  NIL 
 
Details of Principal Investigator or overall Trial Coordinator (multi-center study)  
Name  Om vasavi palam 
Designation  SENIOR RESIDENT 
Affiliation  Nizams institute of medical sciences 
Address  Nizams institute of medical sciences Panjagutta hyderabad

Hyderabad
TELANGANA
500082
India 
Phone  8332922102  
Fax    
Email  omvasavi.palam@gmail.com  
 
Details of Contact Person
Scientific Query
 
Name  Sapna Nikhar 
Designation  Additional professor 
Affiliation  Nizams institute of medical sciences 
Address  Nizams institute of medical sciences Panjagutta hyderabad

Hyderabad
TELANGANA
500082
India 
Phone  9030460262  
Fax    
Email  sapnanikhar@gmail.com  
 
Details of Contact Person
Public Query
 
Name  Om vasavi palam 
Designation  SENIOR RESIDENT 
Affiliation  Nizams institute of medical sciences 
Address  Nizams institute of medical sciences Panjagutta hyderabad

Hyderabad
TELANGANA
500082
India 
Phone  8332922102  
Fax    
Email  omvasavi.palam@gmail.com  
 
Source of Monetary or Material Support  
Nizam’s institute of medical sciences, hyderabad 
 
Primary Sponsor  
Name  Om vasavi palam 
Address  Nizam’s institute of medical sciences, hyderabad ,500082 
Type of Sponsor  Other [SELF] 
 
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 
Om vasavi palam  NIMS  Department of anesthesiology , NIMS , hyderabad, 500082
Hyderabad
TELANGANA 
8332922102

omvasavi.palam@gmail.com 
 
Details of Ethics Committee  
No of Ethics Committees= 1  
Name of Committee  Approval Status 
Nizam’s 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 
Intervention  Cuff pressure manometer( AG Cufill Manometer)  Assessing tracheal cuff pressure after intubation in supine position, thereafter in prone position at 1st hour of surgery and then at the end of surgery in prone position, and then 4th measurement is done after supining the patient before extubation 
 
Inclusion Criteria  
Age From  18.00 Year(s)
Age To  60.00 Year(s)
Gender  Both 
Details  1.Written valid consent, Elective percutaneous nephrolithotomy surgery, Mallampati score 1-3, BMI 18.5-35kg/m2, creatinine less than or equal to 2mg/dl, ASA 1 and 2 
 
ExclusionCriteria 
Details  1. Patient refusal, Patients with morbid obesity, Anticipated difficult airway, Compromised cardio-respiratory functions, Patient with tracheostomy, Patients with sorethroat, hoarsness, cough, Pregnant women, Procedures requiring transfusion of blood or blood products 
 
Method of Generating Random Sequence   Not Applicable 
Method of Concealment   Not Applicable 
Blinding/Masking   Not Applicable 
Primary Outcome  
Outcome  TimePoints 
To assess the effect of prone position on tracheal cuff pressure in percutaneous nephrolithotomy surgery  Assessing tracheal cuff pressure after intubation in supine position, thereafter in prone position at 1st hour of surgery and then at the end of surgery in prone position, and then 4th measurement is done after supining the patient before extubation 
 
Secondary Outcome  
Outcome  TimePoints 
To assess the incidence of postoperative sore throat in prone position in percutaneous nephrolithotomy surgery  1 year  
 
Target Sample Size   Total Sample Size="70"
Sample Size from India="70" 
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)   17/08/2025 
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)
Modification(s)  
Open to Recruitment 
Recruitment Status of Trial (India)  Open to Recruitment 
Publication Details
Modification(s)  
N/A 
Individual Participant Data (IPD) Sharing Statement

Will individual participant data (IPD) be shared publicly (including data dictionaries)?  

Response - NO
Brief Summary
Modification(s)  
This is a Prospective Observational study to  evaluate changes in tracheal cuff pressure in patients undergoing percutaneous nephrolithotomy in prone position and its correlation with sore throat

Primary objective- To assess the effect of prone position on tracheal cuff pressure in percutaneous nephrolithotomy surgery
Secondary objective– To assess the incidence of postoperative sore throat in prone position in percutaneous nephrolithotomy surgery

Principle goal of tracheal cuff is to maintain and adequate seal in the airway to deliver mechanical ventilation. A cuff pressure between 20-30cm H2O is recommended to provide adequate seal. The ultimate goal is to reduce the risk of complication of over inflation of cuff like post-operative sore throat, hoarseness, cough and under inflation like micro aspiration , ventilator associated pneumonia.

HYPOTHESIS – Tracheal cuff pressure will increase in prone position in percutaneous nephrolithotomy patients and will lead to more incidence of sore throat. 
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