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The purpose of this study is to investigate the changes of the oropharyngeal leak pressure of the air-Q self-pressurizing masked laryngeal airway in the different head and neck positions. Moreover, the adequacy of ventilation will be assessed in the different head and neck positions.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Neutral | Active Comparator | The patient's head will be in neutral position. |
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| Flexed | Experimental | The patient's head will be flexed. |
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| Extended | Experimental | The patient's head will be extended. |
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| Rotated | Experimental | The patient's head will be rotated. |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Neutral head position | Procedure |
| ||
| Flexed head position |
| Measure | Description | Time Frame |
|---|---|---|
| Oropharyngeal leak pressure | The oropharyngeal leak pressure was measured by closing the expiratory valve of the circle system at fixed O2 flow 3L/min and 40 cmH2O | Within 5 minutes after the insertion of the air-q self-pressurizing masked laryngeal airway |
| Measure | Description | Time Frame |
|---|---|---|
| Peak airway pressure | Within 5 minutes after the insertion of the air-q self-pressurizing masked laryngeal airway | |
| Fiberoptic bronchoscope grade | Within 5 minutes after the insertion of the air-q self-pressurizing masked laryngeal airway |
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Inclusion Criteria:
Exclusion Criteria:
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine | Seoul | Seoul | 120-752 | South Korea |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 28203730 | Derived | Kim HJ, Lee K, Bai S, Kim MH, Oh E, Yoo YC. Influence of head and neck position on ventilation using the air-Q(R) SP airway in anaesthetized paralysed patients: a prospective randomized crossover study. Br J Anaesth. 2017 Mar 1;118(3):452-457. doi: 10.1093/bja/aew448. |
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| Extended head position | Procedure |
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| Rotated head position | Procedure |
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| Air-Q SP Airway | Device |
|