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Comparison of various videolaryngoscope devices (Vividtrac™ and KingVision™) and direct laryngoscopy with Macintosh blade regarding laryngoscopy time, intubation time, intubation success rate, percentage of visible glottic opening (POGO score) in elective and acute clinical anaesthesiology practice.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Macintosh laryngoscopy | Active Comparator | In this group intubation attempt is carried out with a standard Macintosh (size 3 or 4) direct laryngoscopy blade. |
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| KingVision videolaryngoscope | Active Comparator | In this group intubation attempt is carried out with KingVision videolaryngoscope with a channeled, disposable single-use blade. |
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| VividTrac videolaryngoscope | Active Comparator | In this group intubation attempt is carried out with VividTrac Adult model using a smartphone or laptop running the VividVision proprietary software. |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Direct laryngoscopy | Device | During the induction of general anaesthesia, the first attempt to achieve a secured airway is carried out using a size 4 (or size 3 if necessary) Macintosh blade direct laryngoscope. |
| Measure | Description | Time Frame |
|---|---|---|
| Intubation time | Time necessary to secure airway during the induction of general anesthesia. Intubation time is measured from the point the airway device crosses the interdental line until the completion of intubation with insufflated cuffed endotracheal tube (secured airway). | Measured once during the intubation attempt. Up to 120 seconds following the start of intubation attempt. |
| Measure | Description | Time Frame |
|---|---|---|
| Laryngoscopy time | Time necessary to achieve best visualisation of the glottic opening. | Registered once during the intubation attempt. Up to 120 seconds following the start of intubation attempt. |
| Percentage of glottic opening (POGO) score |
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Inclusion Criteria:
Exclusion Criteria:
-
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Gábor Woth, MD PhD | Contact | +36703729231 | glwoth@gmail.com | |
| Dóra Keresztes, MD | Contact | +36303875837 | keresztesdora87@gmail.com |
| Name | Affiliation | Role |
|---|---|---|
| Bálint Nagy, MD PhD | Department of Anesthesiology and Intensive Therapy, University of Pécs, Hungary | Study Chair |
| Szilárd Rendeki, MD | Department of Anesthesiology and Intensive Therapy, University of Pécs, Hungary |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| University of Pécs, Dept. of Anaesthesia and Intensive Care | Recruiting | Pécs | Baranya | 7622 | Hungary |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 28549421 | Background | Rendeki S, Keresztes D, Woth G, Merei A, Rozanovic M, Rendeki M, Farkas J, Muhl D, Nagy B. Comparison of VividTrac(R), Airtraq(R), King Vision(R), Macintosh Laryngoscope and a Custom-Made Videolaryngoscope for difficult and normal airways in mannequins by novices. BMC Anesthesiol. 2017 May 26;17(1):68. doi: 10.1186/s12871-017-0362-y. |
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Following informed consent participants are randomised into one of the device groups and general anaesthesia is induced. Primary intubation attempt is carried out with the randomised device. We do not disclose the result of randomisation with our participants prior to anaesthesia induction. Participants are already in surgical anaesthesia with muscle relaxation during the intubation attempt. As providers are the users of the intubation device masking is not possible in this regard. During outcome assessment we plan not to disclose which device was used for a certain group.
| Vividtrac videolaryngoscope | Device | During the induction of general anaesthesia, the first attempt to achieve a secured airway is carried out using a Vividtrac videolaryngoscope connected to a tablet or smartphone. |
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| KingVision videolaryngoscope | Device | During the induction of general anaesthesia, the first attempt to achieve a secured airway is carried out using a KingVision videolaryngoscope. |
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The POGO score describes the best view of the glottic opening compared to the anatomical picture of the glottis. During direct laryngoscopy the investigator registers an approximate socre, while video laryngoscopy records are assessed by an independent investigator.
| Registered once during the intubation attempt. Up to 120 seconds following the start of intubation attempt. |
| Tube insertion time | Time necessary for the operator to insert the cuffed endotracheal tube inside the proximal part of the trachea through the glottic opening. Tube insertion time is measured after the investigator finished the search for the glottic opening, achieved best view and decided to insert the tube into the trachea until the cuff is inflated and the airway is secured. | Registered once during the intubation attempt. Up to 120 seconds following the start of intubation attempt. |
| Primary intubation attempt success rate | All intubation attempts must be finished within 120 seconds or the investigator should give up the attempt and reoxygenize the patient before another attempt. If the investigator finished within the 120 seconds time frame we assess endotracheal tube position by capnography and auscultation. The attempt is regarded successful if the tube is in the right position and the airway is secured. | Measured once after intubation. Up to 120 seconds following the start of intubation attempt. |
| Lajos Bogár, MD PhD DSc | Department of Anesthesiology and Intensive Therapy, University of Pécs, Hungary | Study Chair |