A Study on the Relationship Between Preoperative Laryngeal Ultrasound Findings and the Optimal Insertion Position of a Laryngeal Mask

A Study on the Relationship Between Preoperative Laryngeal Ultrasound Findings and the Optimal Insertion Position of a Laryngeal Mask - Correlation between Neck Ultrasound Findings and Laryngeal Mask Insertion Position

Status

Recruiting

Phases

Unknown

Study type

Observational

Source

JPRN

Registry ID

JPRN-UMIN000060024

Enrollment

150

Registered

2025-12-10

Start date

2025-12-09

Completion date

Unknown

Last updated

2026-06-29

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

Conditions

General Anesthesia Cases with Airway Management Using a Laryngeal Mask

Interventions

None listed

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Cases aged 18 years or older managed with LM under general anesthesia at our hospital

Exclusion criteria

Exclusion criteria: Patient refusal Cervical spine pathology Severe cardiovascular disease Unstable teeth Anatomical airway abnormalities

Design outcomes

Primary

Measure	Time frame
Prior to anesthesia, measure various indicators via laryngeal ultrasound (hyoid bone width, depth of epiglottis from skin, mandibular condyle displacement during mouth opening). To evaluate the position of the laryngeal mask under bronchoscopy. A score of 3 or higher is considered	—

Secondary

Measure	Time frame
After induction of anesthesia, perform a leak test once stable.	—

Countries

Japan

Contacts

Public ContactSeiji Hida

Niigata Prefectural Tokamachi Hospital Department of anesthesiology

seijihida@yahoo.co.jp0257575566

Outcome results