The Cuff Pressure of an Endotracheal Tube After Supine-to-lateral Position Change

Study Overview
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Brief Summary
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To compare the cuff pressure in lateral position between barrel-shaped cuff and taper-shaped cuff

Detailed Description
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The position of endotracheal tubes depends on the position of the patients. The change of the tube's position is known to influence the pressure of tube's cuff. The shape of the cuff (barrel-shaped versus tapered-shaped) may affect the tube's migration degree because of the difference of the frictional force. The investigator try to compare the the cuff pressure after supine-to-lateral position change between barrel-shaped cuff and taper-shaped cuff.

Official Title
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Comparison of the Cuff Pressure of an Endotracheal Tube After Supine-to-lateral Position Change: Barrel-shaped vs. Taper-shaped Cuff

Conditions
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Intubation, Pain, Pharyngitis, Hoarseness, Cough

Intervention / Treatment
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* Device: Barrel
* Device: Tapered


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patient scheduled for nephrectomy in lateral decubitus position Exclusion Criteria: Pregnancy Patients with difficult airway Patients with neck motion disorder Patients with history of neck surgery Patients with history of oral and pharyngeal surgery Patients with body mass index > 35 Patients without teeth

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 80 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Barrel<br>Endotracheal tube with barrel-shaped cuff will be used during general anesthesia. | Device: Barrel<br>* Barrel-shaped endotracheal tube will be used during general anesthesia.<br>|
| Active Comparator: Tapered<br>Endotracheal tube with tapered-shaped cuff will be used during general anesthesia. | Device: Tapered<br>* Tapered-shaped tube will be used during general anesthesia.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| The cuff pressure after supine-to-lateral position change | The cuff pressure will be measured after supine-to-lateral position change using the Manometer Portex®. | At 10 minutes after anesthetic induction | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| The distance from the tube to the carina | The distance from the tube to the carina will be measured using bronchoscopy after supine-to-lateral position change. | At 10 minutes after anesthetic induction | 
| Complications related to endotracheal tube | Complications related to endotracheal tube (sore throat, hoarseness, dysphagia and cough) will be measured as 0:none, 1:mild, 2:moderate, 3:severe at 0, 2, and 24 hours postoperatively. | At 0, 2, and 24 hours postoperatively |