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A Study Comparing Two Neck Measurements to Predict Difficulty in Breathing Tube Placement During Anaesthesia in Obese and Non-Obese Patients

A comparison of neck circumference to thyromental distance ratio with hyomental distance ratio in predicting difficult laryngeal visualisation in obese and non obese population - NIL

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
CTRI
Registry ID
CTRI/2026/03/106264
Enrollment
110
Registered
2026-03-16
Start date
Unknown
Completion date
Unknown
Last updated
2026-03-30

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

Conditions

Health Condition 1: J958- Other intraoperative and postprocedural complications and disorders of respiratory system, not elsewhere classified

Interventions

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

Sponsors

Institute of Anaesthesiology, Government Rajaji Hospital and Madurai Medical College
Lead Sponsor

Eligibility

Inclusion criteria

Inclusion criteria: -Scheduled for elective surgery under general anaesthesia with endotracheal intubation. -Able to cooperate and provide informed written consent. -Normal cervical spine mobility and no limitation of mouth opening

Exclusion criteria

Exclusion criteria: Patients with limited cervical spine movement. Patients with known or suspected airway pathology. History of difficult intubation or failed airway in prior anesthesia records. Edentulous patients Pregnant females Emergency surgeries Patients requiring rapid sequence induction (RSI) or awake fiberoptic intubation. Severe obesity (BMI greater than 45 kg/m ) or morbid obesity with OSA requiring advanced airway planning. Patients with anticipated ventilation difficulty. Refusal to provide informed consent.

Design outcomes

Primary

MeasureTime frame
To evaluate and compare the predictive accuracy of different airway assessment indices specifically modified Mallampati grade (MMG), neck circumference at the thyroid (NCt) level, neck circumference to thyromental distance ratio (NCTMD), and hyomental distance ratio (HMDR)-for DVL between obese and non-obese patientsTimepoint: At the time of Intubation—

Secondary

MeasureTime frame
To findout prevalence of difficult laryngeal visualization (DVL) in obese and non-obese patients undergoing general anesthesia and endotracheal intubation using various airway indices. To determine the variations in laryngeal visualization with regards to other Anthropometric Measurements of the body.Timepoint: At the time of intubation—

Countries

India

Contacts

Public ContactDr Rajanalini MD DGO

Government Rajaji Hospital and Madurai Medical College

rajanalinimmc@gmail.com8056057566

Outcome results

None listed

Source: CTRI (via WHO ICTRP) · Data processed: Apr 4, 2026