King Vision vs Macintosh Laryngoscopy for Intubation Time in Novice Users (KVVL)

Hitit University

Status: Completed

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

Treatments: Device: King Vision Channeled Video Laryngoscope; Device: Macintosh Laryngoscopy

Study type: Interventional

Funder types: Other

Identifiers

NCT07174050

KINGVISON1

2018/5 (Other Identifier)

Details and patient eligibility

About

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.

Enrollment: 70 patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

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

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

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70 participants in 2 patient groups

Group K

Experimental group

Description:

Channelled blade of KVVL

Treatment:

Device: King Vision Channeled Video Laryngoscope

Group M

Active Comparator group

Description:

Macintosh laryngoscope

Treatment:

Device: Macintosh Laryngoscopy