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Evaluation of Simple Airway Measurements to Predict Difficult Intubation in Surgical Patients

An Observational Study to Predict difficult intubation with the ratio of neck circumference to thyromental distance and the ratio of neck circumference to inter-incisor gap in patient undergoing surgery under general anesthesia at S.M.S. Medical college and hospital, Jaipur (Rajasthan) - NIL

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
CTRI
Registry ID
CTRI/2026/06/112135
Enrollment
85
Registered
2026-06-08
Start date
Unknown
Completion date
Unknown
Last updated
2026-06-22

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Health Condition 1: O- Medical and Surgical

Interventions

Intervention1: Nil: Nil Intervention2: Nil: Nil Intervention3: Nil: Nil

Sponsors

SMS Medical College And Hospital
Lead Sponsor

Eligibility

Inclusion criteria

Inclusion criteria: 1. All patients undergoing surgery under general anaesthesia requiring endotracheal intubation 2. Patients giving written informed consent. 3. Either gender 4. Age 18 to 60 yrs 5. American Society of Anaesthesiologists (ASA) physical status I, II, III

Exclusion criteria

Exclusion criteria: 1. Patients with anticipated difficult intubation. 2. Patients with oropharyngeal masses, neck masses, any neck abnormality, temporo-mandibular joint immobility or cervical joint instability. 3. Pregnant Women

Design outcomes

Primary

MeasureTime frame
1.To determine the predictive values and accuracy of two ratios of Neck Circumference to Thyromental Distance (RNTMD) and the ratio of Neck Circumference to Inter-Incisor Gap (RNCIIG) for predicting unanticipated difficult endotracheal intubation 2.To determine the correlation coefficient of two ratios of Neck Circumference to Thyromental Distance (RNTMD) and the ratio of Neck Circumference to Inter-Incisor Gap (RNCIIG), for predicting unanticipated difficult endotracheal intubationTimepoint: Time Point 1: Preoperative airway assessment (NC, TMD, IIG, NC/TMD ratio, NC/IIG ratio). Time Point 2: Intraoperative assessment during laryngoscopy (Cormack-Lehane grade).—

Secondary

MeasureTime frame
To assess difficult intubation using IDS (intubation difficulty score) Timepoint: Time Point 3: Intubation assessment (IDS score, number of attempts, adjuncts used, time taken for intubation).—

Countries

India

Contacts

Public ContactDr Harshita Khinchi

SMS medical college and hospital

drsushilbhati@yahoo.co.in9414779786

Outcome results

None listed

Source: CTRI (via WHO ICTRP) · Data processed: Jun 29, 2026