King Vision vs Macintosh Laryngoscopy for Intubation Time in Novice Users

Not Applicable

Completed

• Conditions: Airway Management; Tracheal Intubation, Elective Surgery; Endotracheal Intubation

• Registration Number: NCT07174050
• Lead Sponsor: Hitit University

Brief Summary

This study evaluated two different devices used for placing a breathing tube (endotracheal intubation) in adult patients undergoing elective surgery. The aim was to compare the King Vision videolaryngoscope, which has a camera and a guiding channel for the tube, with the traditional Macintosh laryngoscope, which allows doctors to look directly at the vocal cords. The study focused on how long it takes to successfully insert the tube, the need for additional maneuvers during the procedure, and the overall success rate of first attempts. The procedures were performed by novice operators under supervision.

Detailed Description

Not available

Study Timeline

• Study Start: 2023-01-01
• Primary Completion: 2023-07-31
• Study Completion: 2024-01-01
• Status Verified: 2025-09
• Study First Submitted: 2025-09-08
• Study First Submitted QC: 2025-09-08
• Last Update Submitted: 2025-09-08
• Study First Posted: 2025-09-15
• Last Update Posted: 2025-09-15

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 70

Inclusion Criteria

• Adult patients (≥18 years old) scheduled for elective surgery under general anesthesia requiring orotracheal intubation
• American Society of Anesthesiologists (ASA) physical status I-II
• Mallampati airway classification I-II
• Written informed consent obtained from the patient

Exclusion Criteria

• Predicted or known difficult airway: Mallampati III-IV, inter-incisor distance <2.5 cm, thyromental distance <6 cm, limited cervical spine mobility
• History of difficult intubation or need for awake/rapid-sequence intubation
• Upper airway pathology (tumour, trauma, infection), limited mouth opening, or craniofacial anomalies
• Emergency surgery, high aspiration risk, or full stomach
• Severe cardiopulmonary instability (e.g., shock, severe hypoxaemia)
• Pregnancy or breastfeeding
• BMI >35 kg/m² (if your protocol excludes obesity; remove if not applicable)
• Participation refusal or inability to consent

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Primary Outcome Measures

Name	Time	Method
Time to successful endotracheal intubation (seconds)	During intubation (intraoperative period, approximately 1-2 minutes)	Measured from insertion of the laryngoscope blade between the patient's incisors until removal of the blade after correct placement of the endotracheal tube, confirmed by capnography.

Trial Locations

Locations (1)

Izmir City Hospital; Izmir, Turkey (Türkiye)