The Effect of Ultrasonographic Airway Measurements and Anatomical Differences on Laryngeal Mask Placement in Young and Older Adults

The Effect of Ultrasonographic Airway Measurements and Anatomical Differences on Laryngeal Mask Placement in Young and Older Adults: A Prospective Observational Study

Status

Recruiting

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT07776847

Enrollment

188

Registered

2026-08-20

Start date

2025-07-01

Completion date

2027-08-30

Last updated

2026-08-24

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

Conditions

Airway Management, Laryngeal Mask Airway Insertion Skill

Keywords

Laryngeal mask airway, airway ultrasonography, geriatrics

Brief summary

This prospective observational study aims to compare ultrasonographic upper-airway measurements and age-related anatomical differences between young adults (18-40 years) and older adults (\>65 years), and to evaluate their effects on laryngeal mask airway (LMA) placement success and position accuracy. Preoperative airway ultrasonography measurements will be assessed, followed by evaluation of LMA placement, ventilation efficacy, insertion attempts, placement time, and complications. Ultrasonography will also be used to assess LMA position after placement, with confirmation by leak testing and fiberoptic evaluation. Preoperative and postoperative gastric volume will additionally be assessed.

Detailed description

Laryngeal mask airway use is common in general anesthesia. Age-related anatomical and physiological changes of the upper airway may influence LMA placement in older adults. The study will prospectively evaluate patients undergoing procedures suitable for LMA placement at Düzce University Faculty of Medicine. Participants will be divided into young adults (18-40 years) and older adults (\>65 years). Demographic, anthropometric, clinical airway assessment and ultrasonographic airway measurements will be recorded. Following standardized induction, a ProSeal LMA will be placed by an anesthesia research resident with at least three years of experience. The number of insertion attempts and placement time will be recorded. LMA position will be assessed by ultrasonography and compared with leak testing and fiberoptic confirmation. Ventilation parameters, cuff pressure, LMA position changes, gastric volume and postoperative complications will also be recorded.

Interventions

None listed

Study design

Observational model

COHORT

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

18 Years to No maximum

Healthy volunteers

Inclusion criteria

* Patient or legally appropriate representative/relative accepts participation as applicable. * Surgery suitable for LMA placement. * Age 18-40 years or \>65 years.

Exclusion criteria

* Pregnancy * Age \<18 years * History of upper airway surgery * Gastroesophageal reflux disease, ulcer, or gastrointestinal bleeding history * Inadequate fasting duration * Emergency surgery * Requirement for nasogastric tube placement * Unstable teeth * Mouth opening \<3 cm * Recent pulmonary infection * Recent upper airway infection * Pulmonary disease associated with increased airway pressures (cystic fibrosis, COPD, interstitial lung disease) * Restricted cervical movement / inability to achieve required extension * Ultrasound gel allergy * Refusal to participate

Design outcomes

Primary

Measure	Time frame	Description
First-attempt successful LMA placement rate	During LMA insertion	The primary outcome will compare the proportion of successful first-attempt ProSeal LMA placements between young and older adult groups.

Countries

Turkey (Türkiye)

Contacts

CONTACTZennur Güven, Assistant Researcher

zennurguven@gmail.com+90 5459740213

Outcome results