Key result
The single-use Ambu aScope was noninferior to the Olympus re-usable fibrescope for time to task completion in a manikin.
Why the study?
Does the single-use Ambu aScope provide non-inferior manoeuvrability and ease of use compared to the Olympus re-usable fibrescope in a manikin model?
RCT (n=75)
crossover
Does the single-use Ambu aScope provide non-inferior manoeuvrability and ease of use compared to the Olympus re-usable fibrescope in a manikin model?
The single-use Ambu aScope demonstrated non-inferior manoeuvrability compared to a re-usable Olympus fibrescope in a manikin model, despite being perceived as slightly less easy to use.
Answers are grounded in this paper and cite their sources.
Noninferior manikin performance supports single-use scope consideration in training; extends noninferiority data to disposable fibreoptic platforms.
In this study, we compared the manoeuvrability and ease of use of the single-use Ambu aScope and Olympus re-usable fibrescope in a manikin set to simulate difficult fibrescope placement. A total of 75 anaesthetists took part in this randomised crossover non-inferiority study. We recorded the time to task completion, tip surface collision count and participants' impression of ease of use. For the Ambu aScope and Olympus fibrescope, the mean (SD) first attempt time to task completion was 63 (31) s and 53 (23) s, respectively (95% CI of the difference 3-17 s), p = 0.008. This rejected the null hypothesis of a difference of > 30 s. The mean (SD) number of tip surface collisions was 2.7 (1.9) and 2.5 (1.8), respectively, (95% CI of the difference -0.4 to 0.7) p = 0.56. However, the participants found the Olympus easier to use (p < 0.001). Mean (SD) visual analogue scores for the perceived ease of use (0 mm = extremely difficult and 100 mm = extremely easy) were 65 (18) mm and 77 (14) mm for the Ambu aScope and Olympus scopes, respectively. This study found that the single-use Ambu aScope is as easy to manoeuvre as the Olympus re-usable fibrescope. This single-use device appears to be an acceptable alternative to the re-usable fibrescope.
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Vijayakumar et al. (2011) conducted an RCT in simulated difficult fibrescope placement (n=75). Ambu aScope vs. Olympus re-usable fibrescope was evaluated on first attempt time to task completion (MD 10, 95% CI 3-17, p=0.008). The single-use Ambu aScope was noninferior to the Olympus re-usable fibrescope for time to task completion in a manikin.
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