Effectiveness of Cricoid and Paratracheal Pressures for Occluding Esophagus

Effectiveness of Cricoid and Paratracheal Pressures for Occluding Esophagus in Anesthetized and Paralyzed Patients During the Induction of Anesthesia

Status

Completed

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT03992950

Enrollment

Registered

2019-06-20

Start date

2021-09-01

Completion date

2022-01-25

Last updated

2022-02-10

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

Conditions

Intubation Complication

Brief summary

Comparing the effects of 'Cricoid pressure' or 'Paratracheal pressure' during direct laryngoscopy

Detailed description

The effectiveness of cricoid pressure and paratracheal pressure for occluding esophagus during direct and video laryngoscopies.

Interventions

OTHERManeuvers for occluding esophagus

Cricoid pressure: pressure on the cricoid ring Paratracheal pressure: pressure on the left paratracheal region below the cricoid level

Study design

Allocation

RANDOMIZED

Intervention model

CROSSOVER

Primary purpose

PREVENTION

Masking

NONE

Eligibility

Sex/Gender

ALL

Age

19 Years to No maximum

Healthy volunteers

Inclusion criteria

* Who would be scheduled any surgery under general anesthesia and agree with the purpose of the study

Exclusion criteria

* Risk of aspiration * History of esophageal surgery * Diseases or anatomical abnormalities of the neck, larynx, pharynx or esophagus * Known or predicted difficult airway.

Design outcomes

Primary

Measure	Time frame	Description
Occlusion of the esophagus	During 1 minute under videolaryngoscopy	Occlusion of the esophagus is checked with the application of cricoid and paratracheal pressures using esophageal stethoscope. If the esophageal stethoscope is not advanced into the esophagus, it is considered 'occlusion'.

Secondary

Measure	Time frame	Description
Outer diameter of the esophagus	During 1 minute after injection of anesthetics during induction of anesthesia	Outer diameter of the esophagus is measured using ultrasound before and after the application of cricoid and paratracheal pressures.
Position of the oesophageal entrance relative to the glottis	During 1 minute after injection of anesthetics during induction of anesthesia and during videolaryngoscopy	Position of the oesophageal entrance relative to the glottis is evaluated.
Position of the upper oesophagus relative to the trachea	During 1 minute after injection of anesthetics during induction of anesthesia and during videolaryngoscopy	Position of the upper oesophagus relative to the trachea trachea is evaluated.
The best laryngeal view	Before and after the application of cricoid and paratracheal force during videolaryngoscopy	The best laryngeal view is evaluated using the percentage of glottis opening (POGO) score, ranging from 0% to 100%.

Countries

South Korea

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026