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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.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Paratracheal pressure group | Experimental | After the induction of anesthesia, the i-gel is placed under the application of paratracheal pressure. |
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| Cricoid pressure group | Active Comparator | After the induction of anesthesia, the i-gel is placed under the application of cricoid pressure. |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Placement of the i-gel | Other | 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. |
| Measure | Description | Time Frame |
|---|---|---|
| The success rate of the i-gel placement | 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. | Immediately after the placement of the i-gel |
| Measure | Description | Time Frame |
|---|---|---|
| Time to 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. | Immediately after the placement of the i-gel |
| The rate of optimal position of the i-gel |
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Inclusion Criteria:
Exclusion Criteria:
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Seoul Metropolitan Government Seoul National University Boramae Medical Center | Seoul | 156-707 | South Korea |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 38507025 | Derived | Won D, Kim H, Chang JE, Lee JM, Kim TK, Kim H, Min SW, Hwang JY. Comparison of the effects of paratracheal pressure and cricoid pressure on placement of the i-gel(R) supraglottic airway: a randomized clinical trial. Can J Anaesth. 2024 Jul;71(7):996-1003. doi: 10.1007/s12630-024-02741-1. Epub 2024 Mar 20. |
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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
| Immediately after the placement of the i-gel |
| Difficulty of the i-gel placement | Difficulty of the i-gel placement is assessed as follows; 1, very easy; 2, easy; 3, moderate; 4, difficult; 5. very difficult | Immediately after the placement of the i-gel |
| Tidal volume | 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). | At 1 minute after the placement of the i-gel |
| Peak inspiratory pressure | 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).. | At 1 minute after the placement of the i-gel |