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There will be a difference of the insertion depth between the types of the endotracheal tube.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| plain tube | |||
| reinforced tube |
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| Measure | Description | Time Frame |
|---|---|---|
| the distance between endotracheal tube tip and carina | within 1 minute after intubation |
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Inclusion Criteria:
Exclusion Criteria:
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American Society of Anesthesiologists physical status I, II patients scheduled for elective surgery with general anesthesia
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Kyung Hee University Hospital at Gangdong | Seoul | 134-090 | South Korea |
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