Comparison of Video-assisted laryngeal mask airway versus standard laryngeal mask airway in adult elective surgery: a prospective randomized controlled trial.

Status

Active, not recruiting

Phases

Phase 1

Study type

Interventional

Source

TCTR

Registry ID

TCTR20251117004

Enrollment

Registered

2025-11-17

Start date

2025-10-23

Completion date

Unknown

Last updated

2026-08-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Airway management during general anesthesia in adult elective surgery. Anesthesia, General, Airway management, Laryngeal masks

Interventions

Participants will receive LMA insertion using a video-assisted laryngeal mask airway under direct camera visualization. The operator visualizes the laryngeal inlet during insertion to optimize device

s recommended technique. Oropharyngeal leak pressure (OLP) and other outcomes will be assessed identically to the intervention group.

Active Comparator Device,Placebo Comparator Device

Video-assisted Laryngeal Mask Airway (Video-LMA),Standard Laryngeal Mask Airway (Standard LMA)

Eligibility

Sex/Gender

All

Age

18 Years to 65 Years

Inclusion criteria

Inclusion criteria: 1. Patients aged 18 to 65 years with who provide written informed consent to participate in the study 2. Patients classified as ASA physical status 1,2 3. Undergoing elective surgery under general anesthesia with an expected duration of less than 3 hours

Exclusion criteria

Exclusion criteria: 1. Patients with predicted difficult airway or limited mouth opening 2. Body mass index (BMI) greater than 30 3. High risk of aspiration, such as gastrointestinal infection, presence of hiatal hernia, or uncontrolled gastroesophageal reflux disease (GERD) 4. Presence of upper airway pathology or upper respiratory tract infection within 2 weeks prior to surgery 5. Patient refusal to participate in the study

Design outcomes

Primary

Measure	Time frame
Oropharyngeal leak pressure Immediately after successful LMA insertion Measured in cmH2O using leak test	—

Secondary

Measure	Time frame
Glottic exposure grade Immediately after LMA insertion Assessed visually via video-assisted view and graded according to glottic visualization scale,Insertion time Immediately after insertion Time from picking up LMA until effective ventilation confirmed by EtCO2 tracing,First-attempt success rate Immediately after insertion Proportion of cases with successful ventilation at first insertion attempt,Blood staining on LMA after removal After LMA removal Presence of visible blood on LMA surface after removal,Incidence of sore throat, hoarseness, and cough At 1 hour and 12 hours postoperatively Assessed by direct questioning or standardized postoperative questionnaire,Number of repositioning attempts During insertion Number of repositioning maneuvers required to achieve optimal ventilation	—

Measure

Time frame

Glottic exposure grade Immediately after LMA insertion Assessed visually via video-assisted view and graded according to glottic visualization scale,Insertion time Immediately after insertion Time from picking up LMA until effective ventilation confirmed by EtCO2 tracing,First-attempt success rate Immediately after insertion Proportion of cases with successful ventilation at first insertion attempt,Blood staining on LMA after removal After LMA removal Presence of visible blood on LMA surface after removal,Incidence of sore throat, hoarseness, and cough At 1 hour and 12 hours postoperatively Assessed by direct questioning or standardized postoperative questionnaire,Number of repositioning attempts During insertion Number of repositioning maneuvers required to achieve optimal ventilation

—

Countries

Thailand

Contacts

Public ContactSujinna Tharananithikul

Department of Anesthesiology, Faculty of Medicine Ramathibodi Hospital, Mahidol University

sujinna.tha@hotmail.com022011513

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 10, 2026