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NCT Number: NCT07841392

Recall and Perceived Applicability of Ganzouri Airway Scoring System Versus LEMON Score for Airway Assessment Among Anesthesia Residents

Our aim is to compare the recall and perceived clinical applicability of Ganzouri airway scoring system versus LEMON score for airway assessment from residents' perspective.

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Key information

Age range

25 year–28 year

Sex eligibility

All sexes

Study type

Observational

Primary location

Cairo University

Cairo, 12613, Egypt

Location status: Recruiting

About this study

Securing a patent airway stands as one of the most fundamental obligations in anesthetic practice, and the timely recognition of a potentially difficult airway prior to induction is of paramount importance for patient safety.

Two of the most widely recognized examples are the Ganzouri Airway Scoring system and the LEMON score. The Ganzouri Airway scoring system integrates seven distinct clinical parameters; mouth opening, thyromental distance, Mallampati classification, neck range of motion, ability to prognath, body weight, and history of prior difficult intubation, each carrying a weighted numerical value whose sum reflects the probability of encountering a difficult airway.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Enrolled anesthesiology residents.
  • Currently training at Kasr Al-Ainy Hospitals.
  • Willing to participate and provide informed consent.
  • Available for entire study duration (baseline through 2-week followup).
  • First-year residents who didn't receive training in Ganzouri or LEMON Airway scoring systems.

Exclusion criteria

  • Residents with prior formal training in either Ganzouri or LEMON Airway scoring systems (defined as structured lecture or workshop exceeding 30 minutes).
  • Residents who will be on leave, rotation at external sites, or otherwise unavailable during the 2-week follow-up period.
  • Refusal to participate or provide consent.

Treatment and study plan

Ganzouri Airway Scoring System

Other

This scoring system evaluates seven parameters:

  • Mouth opening (interincisor distance)
  • Thyromental distance
  • Mallampati classification
  • Neck movement
  • Ability to prognath (mandibular protrusion)
  • Body weight
  • History of difficult intubation Each parameter was scored, score interpretation from 1- 4 with increasing difficulty , ≥4 suggesting awake intubation.

LEMON Score

Other

The LEMON mnemonic represents:

  • Look externally (facial trauma, large incisors, beard, etc.)
  • Evaluate 3-3-2 rule (mouth opening, hyomental distance, thyroidtomouth distance)
  • Mallampati score
  • Obstruction (presence of airway obstruction)
  • Neck mobility

Primary outcomes

  1. Mean total immediate recall score

    Time frame: Within 30 minutes after completion of the educational lectures

    The total immediate recall score was assessed using a structured recall checklist within 30 minutes after completion of the educational lectures.

Secondary outcomes

  1. Mean total delayed recall score at Day 14

    Time frame: 14 days after completion of the educational lectures

    The total delayed recall score will be assessed using the same structured recall checklist 14 days after completion of the educational lectures.

  2. Resident satisfaction

    Time frame: 14 days after completion of the educational lectures

    Residents' satisfaction was assessed using a structured post-lecture questionnaire with five-point Likert-scale responses.

Interested in participating?

Recruiting

Interested in participating?

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Sponsors and collaborators

Lead sponsor

Cairo University

Other

Registry information

Official study title

Comparison of Recall and Perceived Applicability of Ganzouri Airway Scoring System Versus LEMON Score for Airway Assessment Among Anesthesia Residents; a Prospective Observational Study

Important dates

Study start
2026
Primary completion
2026
Study completion
2026
First posted
Sep 25, 2026
Registry last updated
Sep 25, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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