Paratracheal Pressure
Conditions
Brief summary
This study aims to compare the effect of paratracheal and cricoid pressure on placement of the i-gel in terms of the success rate of i-gel insertion, time to placement, the rate of optimal position of the device, and difficulty of i-gel placement.
Interventions
OTHERPlacement of the i-gel
The lubricated i-gel is inserted into the mouth and introduced along the hard palate with a continuous and gentle push until resistance was felt in the hypopharynx.
Sponsors
SMG-SNU Boramae Medical Center
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
OTHER
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* Patients scheduled for elective surgery under general anesthesia
Exclusion criteria
* Presence of an upper airway anatomic variation or pathology * Increased risk of pulmonary aspiration * Known or predicted difficult airway * Surgery requiring lateral or prone position, head and neck surgery * Requirements for postoperative ventilator care.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| The success rate of the i-gel placement | Immediately after the placement of the i-gel | Successful placement of the i-gel is determined by proper chest expansion, the presence of a square waveform on the capnogram, absence of an audible leak, and lack of gastric insufflations. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Time to placement of the i-gel | Immediately after the placement of the i-gel | Time to placement is defined as the time from picking up the i-gel to observing the end-tidal CO2 waveform. |
| The rate of optimal position of the i-gel | Immediately after the placement of the i-gel | The anatomic position of the device is evaluated using a fiberoptic bronchoscope and graded on a scale of 1-4 as follows: 4, only the vocal cords seen; 3, vocal cords and posterior part of the epiglottis seen; 2, vocal cords and anterior part of the epiglottis seen; 1, vocal cords not seen, but adequate ventilation |
| Difficulty of the i-gel placement | Immediately after the placement of the i-gel | Difficulty of the i-gel placement is assessed as follows; 1, very easy; 2, easy; 3, moderate; 4, difficult; 5. very difficult |
| Tidal volume | At 1 minute after the placement of the i-gel | Tidal volume is assessed with or without each pressure using the ventilator setting (volume-control mode with a tidal volume of 8 mL/kg of ideal body weight, respiratory rate of 12 breaths/min, and zero end-expiratory pressure). |
| Peak inspiratory pressure | At 1 minute after the placement of the i-gel | Peak inspiratory pressure is assessed with or without each pressure using the ventilator setting (volume-control mode with a tidal volume of 8 mL/kg of ideal body weight, respiratory rate of 12 breaths/min, and zero end-expiratory pressure).. |
Countries
South Korea
Outcome results
None listed