The Use of O Shaped- Endotracheal Tube During Intubation for General Anesthesia: Prospective Randomized Trial

Study Overview
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Brief Summary
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This study is prospective randomized trial study. O type tracheal intubation tube is anatomically consistent and will able to increase the success rate of first intubation without any other external help.

Detailed Description
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This study is divided into two groups. : control vs. O shape endotracheal tube. The investigator was studied 238 consecutive the American Society of Anesthesiologists' physical grades I and II adult patients scheduled to undergo general anesthesia requiring tracheal intubation for elective surgery. Exclusion criteria included a gross anatomical abnormality, before surgery of the head, neck and cervical spine, previously difficult tracheal intubation, loose teeth, or those requiring a rapid sequence or awake intubation, moderate or severe obstructive/restrictive pulmonary disease accompanied by pulmonary function tests. Anesthesia was induced with remifentanyl 3ng/kg, propopol 1-2 mg/kg or TIVA 2% fresopol 4ug/dL, remifentanyl 3ng/dL and rocuronium 0.8 mg/kg to facilitate tracheal intubation. Laryngoscopy was performed after the loss of the fourth twitch in the train-of-four in response to ulnar nerve stimulation. All laryngoscopies using a #4 Macintosh blade were performed with the patient placed in the sniffing position. Tracheal intubation was performed without assistance (ex. External laryngeal manipulation, Used stylet). A single experienced anesthesiologist, blinded to each group, performed all of the direct laryngoscopies and classified the laryngoscopic view according to the modified Cormack and Lehane grade, measured number of attempts, intubation time and blood pressure and heart rate before/ after intubation.

Official Title
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The Use of O Shaped- Endotracheal Tube During Intubation for General Anesthesia: Prospective Randomized Trial

Conditions
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Endotracheal Intubation

Intervention / Treatment
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* Other: group O


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Consented to participate in the study Aged 19 years or older The American Society of Anesthesiologists' physical grades I and II Undergo elective surgery under general anesthesia Exclusion Criteria: Do not agree to participate in research Previously difficult tracheal intubation Rapid induction of anesthesia Previous c-spine disc or had surgery Teeth are severely shaken or poor Moderate or severe obstructive/restrictive pulmonary disease accompanied by pulmonary function tests

Ages Eligible for Study
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Minimum Age: 19 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Other
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| No Intervention: Control<br>Use in the shape of an endotracheal tube. | |
| Experimental: Group O<br>Just before the induction of medicine is injected, the assistant makes endotracheal tube into O shape. | Other: group O<br>* Endotracheal tube was made O shape by assistants.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| First intubation success rate for each between two group | First laryngoscope tries was success using detection of end tidal CO2 | Immediately after intubation | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| First intubation time | After intubation, appearing end tidal CO2 at monitoring | within 60 seconds | 
| Number of attempts | Number of intubation try | From the first tracheal intubation failure to the next successful tracheal intubation | 
| Measured vital sign | Blood pressure in mmHg and heart rate in bpm were recorded immediately before and after intubation. | immediately before intubation and within 5 minites after intubation |