| CTRI Number |
CTRI/2026/01/101537 [Registered on: 19/01/2026] Trial Registered Prospectively |
| Last Modified On: |
18/01/2026 |
| Post Graduate Thesis |
Yes |
| Type of Trial |
Observational |
|
Type of Study
|
Cross Sectional Study |
| Study Design |
Single Arm Study |
|
Public Title of Study
|
Finding out how deep the needle should go for spinal anaesthesia: comparing ultrasound scan with a simple body measurement method Using height |
|
Scientific Title of Study
|
COMPARISON OF ULTRASOUND-GUIDANCE WITH CRAIGS FORMULA FOR MEASUREMENT OF DEPTH OF SUBARACHNOID SPACE IN PATIENTS UNDERGOING SPINAL ANAESTHESIA |
| Trial Acronym |
Nil |
|
Secondary IDs if Any
|
| Secondary ID |
Identifier |
| NIL |
NIL |
|
|
Details of Principal Investigator or overall Trial Coordinator (multi-center study)
|
| Name |
Dr Sunil |
| Designation |
PG RESIDENT |
| Affiliation |
VMMC and SJH |
| Address |
Dept of anaesthesia,Vardhman Mahavir medical college and Safdarjung hospital,New Delhi
South
DELHI
110029
India |
| Phone |
9717208527 |
| Fax |
|
| Email |
chaudhrysunil28@gmail.com |
|
Details of Contact Person
Scientific Query
|
| Name |
Dr Deepa K Khurana |
| Designation |
Professor |
| Affiliation |
VMMC and sjh |
| Address |
Dept of anaesthesia,Vardhman Mahavir medical college and Safdarjung hospital,New Delhi
South
DELHI
110029
India |
| Phone |
9871813837 |
| Fax |
|
| Email |
drdeepakhurana@gmail.com |
|
Details of Contact Person
Public Query
|
| Name |
Dr Deepa K Khurana |
| Designation |
Professor |
| Affiliation |
VMMC and sjh |
| Address |
Dept of anaesthesia,Vardhman Mahavir medical college and Safdarjung hospital,New Delhi
DELHI
110029
India |
| Phone |
9871813837 |
| Fax |
|
| Email |
drdeepakhurana@gmail.com |
|
|
Source of Monetary or Material Support
|
| VMMC and Safdarjung hospital, New delhi |
|
|
Primary Sponsor
|
| Name |
VMMC and sjh |
| Address |
Ansari nagar south west ,New Delhi 110029 |
| Type of Sponsor |
Government medical college |
|
|
Details of Secondary Sponsor
|
|
|
Countries of Recruitment
|
India |
|
Sites of Study
|
| No of Sites = 1 |
| Name of Principal
Investigator |
Name of Site |
Site Address |
Phone/Fax/Email |
| Dr Deepa K Khurana |
VMMC and Safdarjung Hospital,New Delhi |
Dept of anaesthesia and intensive care ,Room no 1 ground floor ,Ansari nagar Delhi 11
South
DELHI |
9717208527
chaudhrysunil28@gmail.com |
|
|
Details of Ethics Committee
|
| No of Ethics Committees= 1 |
| Name of Committee |
Approval Status |
| VMMC and Sjh institutional ethics committee |
Approved |
|
|
Regulatory Clearance Status from DCGI
|
|
|
Health Condition / Problems Studied
|
| Health Type |
Condition |
| Patients |
(1) ICD-10 Condition: O||Medical and Surgical, |
|
|
Intervention / Comparator Agent
|
| Type |
Name |
Details |
| Intervention |
Nil |
Nil |
| Comparator Agent |
Nil |
Nil |
|
|
Inclusion Criteria
|
| Age From |
18.00 Year(s) |
| Age To |
65.00 Year(s) |
| Gender |
Both |
| Details |
All Patients aged between 18 and 65 years of either gender, undergoing elective surgeries under spinal anaesthesia with ASA1 or 2 status |
|
| ExclusionCriteria |
| Details |
1. Patients with known or visible spinal deformities and history of previous spine surgeries. Exclusion Criteria Details 2. Patients with coagulation abnormalities. |3. Patients with allergic or skin diseases in the spinal area |
|
|
Method of Generating Random Sequence
|
Not Applicable |
|
Method of Concealment
|
Not Applicable |
|
Blinding/Masking
|
Not Applicable |
|
Primary Outcome
|
| Outcome |
TimePoints |
| To see if ultrasound can be used to predict skin to sub arachnoid space depth in adult Indian population |
Not applicable |
|
|
Secondary Outcome
|
| Outcome |
TimePoints |
1. To see the accuracy of the Craigs formula for actual skin-to-subarachnoid space distance calculation in the adult Indian population
2. To see the number of Sub Arachnoid Block attempts for a successful spinal anaesthesia
3.To see if Body Surface Area or Body Mass Index has a correlation with Skin to Sub Arachnoid space depth |
Not applicable |
|
|
Target Sample Size
|
Total Sample Size="35"
Sample Size from India="35"
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)
|
05/02/2026 |
| 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="6"
Days="0" |
|
Recruitment Status of Trial (Global)
|
Not Applicable |
| 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
|
Patients meeting inclusion criteria will undergo a pre-anaesthetic evaluation, including physical exam, relevant investigations, and airway assessment. They will be informed about the ultrasound procedure and instructed to fast after 10 PM. Three SSD measurements will be taken: 1) ultrasound at the L3-L4 interspace, 2) Craig’s formula using height, and 3) actual depth after a subarachnoid block using a 25-gauge Quincke needle. The procedure will be performed under aseptic conditions with supervision. Patients with difficulty during the block will be excluded from the study. |