Paratracheal Pressure, Sellick's Maneuver, Airway Management, Cricoid Pressure
Conditions
Keywords
Paratracheal pressure
Brief summary
Paratracheal pressure may have a role in the prevention of pulmonary aspiration. The effects of paratracheal pressure on glottic view, ease of facemask ventilation, or tracheal intubation are not studied yet. In this study, the subjects are divided into two groups (group I: paratracheal pressure applied during induction of anesthesia, group II: conventional Sellick's maneuver applied during induction of anesthesia). Investigators will assess the glottic view during direct laryngoscopy.
Detailed description
Primary outcome: -Cormack-Lehane grade Secondary outcome: * POGO score before and after application of each intervention * Difficulties of mask ventilation after application of each intervention * Inspiratory pressure and tidal volume during manual mask ventilation * Rates of worsening of the glottic view after intervention * The difficulty of endotracheal intubation * Intubation time
Interventions
PROCEDURESellick's maneuver
Conventional Sellick's maneuver is applied by 30N force
PROCEDUREParatracheal pressure
Paratracheal pressure is applied by 30N force with the ultrasound transducer.
Sponsors
Seoul National University Hospital
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
DOUBLE (Subject, Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
Yes
Inclusion criteria
Adult patient undergoing elective surgery with general anesthesia
Exclusion criteria
A patient who does not agree to participate in this study A patient who has a history of cervical/esophageal operation A patient who has a risk of gastric regurgitation A patient who has atherosclerosis of the left carotid artery or history of stroke or angina in 3 months.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Cormack-Lehane grade | During anesthesia induction procedure | Cormack-Lehane grade |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| POGO | During anesthesia induction procedure | The percentage of glottic opening (POGO), linear span from the anterior commissure to the interarytenoid notch, 0-100%, higher value represent a better view |
| Difficulty of mask ventilation | During anesthesia induction procedure | Difficulty of mask ventilation evaluated by the anesthesiologist (Easy/Moderate/Difficult/Impossible) |
| Inspiration pressure | During anesthesia induction procedure | Pressure to maintain adequated ventilation after application of the intervention |
| Tidal volume | During anesthesia induction procedure | Tidal volume which is achieved after application of the intervention |
| Intubation difficulty | During anesthesia induction procedure | Subjective evaluation of the difficulty to pass the endotracheal tube into the glottic opening, easy/moderate/difficult |
Countries
South Korea
Outcome results
None listed