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Association of WWI With Difficult Intubation
Sponsor: Cairo University
Summary
Difficult intubation remains a clinically significant challenge in anesthetic practice, particularly among patients with obesity and altered body composition. Traditional predictors such as BMI and neck circumference have limitations in accurately identifying at-risk patients. The weight-adjusted waist circumference index (WWI), introduced by Park et al., provides a measure of age-related changes in body composition, including loss of muscle mass and retention or increase in fat mass. Some researchers have proposed a cut-off value of 10.4 cm/√kg in men and 10.5 cm/√kg in women to identify unhealthy body composition. WWI provides a clearer picture of fat distribution, especially in individuals with varying body sizes, making it a more reliable tool for assessing health risks related to abdominal fat. After a thorough literature review, studies correlating WWI with DI remain limited. Therefore, the present study aimed to assess the correlation between WWI and DI in 50 patients scheduled for elective surgeries requiring endotracheal intubation under direct laryngoscopy.
Official title: Association of Weight-Adjusted Waist Index With Difficult Intubation: A Prospective Observational Cohort Study
Key Details
Gender
All
Age Range
18 Years - Any
Study Type
OBSERVATIONAL
Enrollment
50
Start Date
2025-11-01
Completion Date
2026-03-25
Last Updated
2026-10-26
Healthy Volunteers
No
Conditions
Interventions
Weight, Height, BMI, Waist circumference, WWI, Neck circumference, Mallampati score, Sternomental distance, EGRI score, BMV grade Cormack-Lehane grade,Number of attempts Use of adjunts
Anthropometric Measurements and WWI Calculation: Waist circumference (WC) was measured while patients were wearing disposable non-woven clothing and no footwear, at the midpoint between the iliac crest and the lowest rib. Body weight was measured using a calibrated digital scale. WWI Calculation: * WWI was calculated using the formula: * WWI=Waist Circumference (cm) ÷ √Weight (kg) * Higher WWI values indicate greater central adiposity Preoperative airway evaluation included: * Modified Mallampati classification * Thyromental distance * Mouth opening (inter-incisor distance) * Neck movement * Prognathism * Neck circumference (measured at the level of the thyroid cartilage) * El-Ganzouri Risk Index (EGRI) The El-Ganzouri Risk Index was calculated using its standard components: Mouth opening, Thyromental distance, Mallampati score,Neck movement,Prognathism,Body weight * History of difficult intubation The score was calculated using MedCalc software.
Locations (1)
Kasr Alainy Hospital
Cairo, Almanial, Egypt