Visualization of the Larynx With the Airtraq Laryngoscope and Image Transmission

Study Overview
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Brief Summary
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The Airtraq is a battery powered single use optical laryngoscope with a channel to hold and guide the tracheal tube into the trachea. It enables tracheal intubation in patients with normal and difficult airways, by enabling laryngoscopy without neck movement. As a single use device, it is cost effective to have these placed in emergency equipment kits, and for use by emergency and military personnel. However, it does have several limitations. The Airtraq requires the user to place his/her eye to the eyepiece in order to see the advancement of the laryngoscope and the tracheal tube, which may be difficult if the patient is on the ground or in emergency scenarios. Only the user can see through the eyepiece and any assistants are unable to view the larynx, this makes it difficult for assistants to help the operator. Many handphones now incorporate high quality cameras. In this study, we will evaluate the effectiveness of using the iPhone to aid laryngoscopy with the Airtraq optical laryngoscope during laryngoscopy and intubation in 30 patients presenting for elective surgery under general anaesthesia. We have manufactured an attachment that fits over the eyepiece of the Airtraq, to hold an iPhone to the eyepiece. This will enable to operator and assistants to simultaneously view the insertion of the Airtraq, view the larynx and view the passage of the tracheal tube into the trachea.

Detailed Description
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This study is a single-cohort study design. 30 patients undergoing elective surgery under general anaesthesia will be recruited. They will have endotracheal intubation done with the Airtraq optical laryngoscope and handphone camera assisted visualization. The Airtraq optical laryngoscope fitted with the attachment holding the camera handphone will be prepared and loaded with an appropriately sized endotracheal tube. A standard general anaesthesia technique will be used. This will include standard monitoring including pulse oximetry, non-invasive blood pressure, ECG and capnography, all started before induction of anaesthesia. Anaesthesia will be induced with proprofol and fentanyl, and muscle relaxation with atracurium. The airway management procedure will start after induction of anaesthesia and muscle relaxation. The Airtraq optical laryngoscope will be used. The Airtraq is fit with an attachment to hold the camera handphone, and loaded with an endotracheal tube. The Airtraq will be inserted and manipulated until the best view of the patient's laryngeal opening can be seen on the camera handphone screen. The endotracheal tube will then be placed in the patient's trachea and the cuff inflated. Successful intubation will be confirmed by 3-point auscultation and presence of end-tidal carbon dioxide tracing.

Official Title
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Visualization of the Larynx With the Airtraq Laryngoscope and Image Transmission

Conditions
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Anaesthesia

Intervention / Treatment
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* Device: Airtraq visualization


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Adult patients requiring general anaesthesia for elective surgery and who require tracheal intubation as part of the anaesthesia technique. American Society of Anesthesiologists Class I to III physiological status. Exclusion Criteria: Children Pregnant patients Patients who have not fasted for at least 6 hours pre surgery Patients at risk of regurgitation and aspiration

Ages Eligible for Study
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Minimum Age: 21 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: Treatment
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Airtraq visualization<br>Larynx visualization with Airtraq and attached handphone | Device: Airtraq visualization<br>* Larynx visualization with Airtraq and attached handphone<br>* Other names: Airtraq Avant;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Visualization of Larynx With the Airtraq Laryngoscope and Handphone | The efficacy of viewing the larynx via the handphone attached to the Airtraq laryngoscope will be assessed. | Intra operative | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Transmission of Airtraq View of Larynx | The view of the larynx will be captured by the handphone attached to the Airtraq layryngoscope, and then transmitted to a second investigator. | Intra operative measurement, time frame within 5 minutes | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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tracheal intubation