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Clinical Trials in India / NCT07668297
Recruiting Observational

Correlation of Neck Dimensions of Airway Evaluation

NCT07668297 · tracked via the Priya Life Science India tracker
Sponsor
Sir Ganga Ram Hospital
Phase
Observational
Started
2026-06-25
Last updated
2026-06-30

Condition(s) studied

Airway AssessmentLaryngoscopy

Study summary

The goal of this observational study is to evaluate thyromental distance (TMD) and mandibular triangle perpendicular length (MTPL); to know which correlates better with the incisor vallecula distance (IVD). Based on the direction and strength of the correlation measure, a multiple regression equation can then be created to first predict the IVD with external linear measure, and second, based on IVD length prediction, the appropriate laryngoscope blade size can be ascertained.

Eligibility

Sex
ALL
Min age
18 Years
Max age
65 Years
Healthy volunteers
No
Inclusion Criteria: 1. Age 18-65 years 2. Males and females 3. ASA (American Society of Anaesthesiologists) physical status I and II 4. Patients scheduled for elective surgery with controlled ventilation through orotracheal tube conduit Exclusion Criteria: 1. Smokers (those who have smoked ≥100 cigarettes in their lifetime), chewing tobacco dependence or substance abuse 2. Submucous fibrosis: progressive fibrosis of the submucosal tissue leading to rigidity, relative trismus, and progressive decrease of mouth opening 3. Anticipated difficult airway 4. Patients requiring intubation with MacIntosh blade #4 or #5 5. Dental issues: * missing tooth (upper/lower incisors, upper/lower premolar) * crowded dentition: - irregular, misaligned, or overlapping teeth within a relatively small oral cavity * presence of artificial teeth and/or dental implants • Mandible/mandibular structure related issues: * Retrognathia: - posterior displacement of the mandible relative to the maxilla or cranial base * Prognathia: - anterior displacement of the mandible relative to the maxilla or cranial base 6. Emergency Surgery 7. Those requiring urgent rapid-sequence intubation due to the presence of a full-stomach status secondary to gastro-esophageal reflux disease, diaphragmatic hernia, among others. 8. Refusal to informed consent

Primary outcome measure(s)

  • Correlation of thyromental distance (TMD) and mandibular triangle perpendicular length (MTPL) with incisor vallecular distance (IVD) — From entry into preoperative area (0 minutes) to time patient is shifted to operating room ( 10-minutes)
    In all patients thyromental distance (TMD) and mandibular triangle perpendicular length (MTPL) will be measured. TMD will be measured as a straight line distance between the bony mentum (tip of the chin) and the superior thyroid notch (upper border of the thyroid cartilage). MTPL will be measured as the perpendicular of the mandibular triangle formed by joining the mental protuberence and point at angle of mandible on either side. During direct larygngosocpoy when the tip of the laryngoscope blade lies on the vallecula, the distance between the laryngoscope blade tip and the point of laryngoscope blade flange overlying the lower incisors will be measured. A correlation between TMD and MTPL with IVD if any will be established.

Trial sites (1)

FacilityCityRegionStatus
Sir Ganga Ram Hospital New Delhi National Capital Territory of Delhi Recruiting

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Official registry record

This page summarises publicly available registry data for informational purposes — not medical advice. Eligibility is determined by each study team; patients should discuss participation with their clinician.

View NCT07668297 on ClinicalTrials.gov ↗ ← All trials in India