Comparison of Video and Direct Laryngoscopy in Obese Patients During Surgery

NCT06973434 | Completed DMC

• 1 other identifier: Ümit
• Study Type: observational
• Target: 135
• Locations: 1 country
• Sites: 1

Brief Summary

This study aims to evaluate how intubation performed with two different brands of videolaryngoscope and the Macintosh laryngoscope during surgeries in obese patients requiring general anesthesia affects the VIDIAC score, hemodynamic response, and early postoperative complications. Complications such as sore throat, hoarseness, nausea, and vomiting will be recorded in the recovery room prior to discharge.

Conditions

Obesity Difficult Airway Airway Management

Keywords

Video laryngoscopy; Obesity; VIDIAC score; Storz C-MAC; Scoper MAC

Outcome Measures

Primary Outcomes (2)

• VIDIAC (Video Intubation Difficulty Assessment and Classification) Score

  Airway visualization will be assessed using the Video Intubation Difficulty Assessment and Classification (VIDIAC) scoring system during intubation. The VIDIAC score ranges from 1 to 5. A lower score indicates better visualization and easier intubation, while a higher score reflects increased difficulty. Score (1-5 scale)

  Immediately after intubation (within 1 minute)

• Heart Rate Change

  Change in heart rate from baseline (pre-induction) to 5 minutes after intubation

  Baseline to 5 minutes post-intubation

Secondary Outcomes (2)

• Successful First-Attempt Intubation Rate

  Immediately after intubation (within 1 minute)

• Intubation Time

  Immediately after intubation

Study Arms (3)

Group 1 (n=40) Intubated with Storz C-MAC3 video laryngoscope

Participants in this group will be intubated using the Storz C-MAC3 video laryngoscope. Preoperative difficult intubation risk, and pre- and post-induction vital signs (heart rate, systolic and diastolic blood pressure, mean arterial pressure) will be recorded. Additionally, VIDIAC scores specific to video-assisted intubation and early postoperative intubation complications will be assessed for this group.

Device: intubation

Group 2 (n=40): Intubated with Scoper MAC-3 video laryngoscope

Participants in this group will be intubated using the Scoper MAC-3 video laryngoscope. Preoperative difficult intubation assessment, pre- and post-induction hemodynamic parameters (heart rate, systolic and diastolic blood pressure, mean arterial pressure), VIDIAC scoring for video laryngoscopy, and postoperative airway-related complications will be evaluated.

Device: intubation

Group 3 (n=40): Control group intubated with Macintosh laryngoscope

Participants in the control group will be intubated using a standard Macintosh direct laryngoscope. Their preoperative airway risk, vital signs before and after induction, and intubation-related complications will be recorded. VIDIAC score will not be used for this group as it applies only to video laryngoscopy.

Device: intubation

Interventions

intubation DEVICE

intubation

Group 1 (n=40) Intubated with Storz C-MAC3 video laryngoscope; Group 2 (n=40): Intubated with Scoper MAC-3 video laryngoscope; Group 3 (n=40): Control group intubated with Macintosh laryngoscope

Eligibility Criteria

• Age: 18 Years - 65 Years
• Sex: all
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Probability Sample

Study Population

The study population will consist of adult patients between the ages of 18 and 65 years with a body mass index (BMI) of ≥30 kg/m², classified as American Society of Anesthesiologists (ASA) physical status I or II. All participants will be scheduled for elective surgery requiring general anesthesia and endotracheal intubation. Eligible participants must meet the inclusion criteria for obesity and provide written informed consent. Patients will be excluded if they have a known or anticipated difficult airway, advanced cardiopulmonary disease, pregnancy, coagulopathy, cervical spine movement limitation, or if they are scheduled for emergency surgery.

You may qualify if:

• Age between 18 and 65 years
• Body mass index (BMI) ≥30 kg/m²
• ASA physical status I or II
• Scheduled for elective surgery
• Requiring endotracheal intubation
• Provided written informed consent

You may not qualify if:

• Refusal to participate in the study
• ASA physical status III, IV, or V
• Advanced cardiopulmonary disease
• Cervical spine movement limitation
• Pregnancy
• Coagulopathy
• Emergency surgery indication
• Known or anticipated difficult airway
• Severe anatomical deformity of the airway

Sponsors & Collaborators

• Harran University: lead

Study Sites (1)

Veli Fahri Pehlivan

Sanliurfa, 63100, Turkey (Türkiye)

Location

MeSH Terms

Conditions

Obesity

Interventions

Intubation

Condition Hierarchy (Ancestors)

Overweight; Overnutrition; Nutrition Disorders; Nutritional and Metabolic Diseases; Body Weight; Signs and Symptoms; Pathological Conditions, Signs and Symptoms

Intervention Hierarchy (Ancestors)

Therapeutics; Investigative Techniques

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: PROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Assistant Professor

Study Record Dates

• First Submitted: April 10, 2025
• First Posted: May 15, 2025
• Study Start: May 1, 2025
• Primary Completion: November 30, 2025
• Study Completion: December 20, 2025
• Last Updated: February 27, 2026

Record last verified: 2026-02

Data Sharing

• IPD Sharing: Will not share

Locations

TU (1)