ArticleInternational journal of emergency medicine2025
A periscope-based, 3D printed indirect laryngoscope for resource limited settings: a non-randomized observational manikin trial.
Article in International journal of emergency medicine, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors.
Funding
Abstract
backgroundIn the United States and other resource-rich settings, video laryngoscopy is often favored for emergency intubation over direct laryngoscopy due to ease of use and improved performance in difficult airways. Video laryngoscopes pose a significant cost barrier against adoption in low- and middle-income countries (LMICs). In this study, we designed and tested a low-cost, 3D printable, periscope-based laryngoscope that achieves an indirect view of the vocal cords without the use of a video camera. The absence of expensive video components allows this device to be manufactured for $4.41 USD, making it well-suited for resource-limited settings.
methodsThe periscope-based laryngoscope was manufactured from polylactic acid (PLA) filament using a 3D printer. Manikin testing of the laryngoscope was performed by providers ranging from medical students to experienced physicians using the high fidelity Laerdal SimMan
resultsA total of 121 trials were performed. In experienced intubators, faster intubation times were seen in the direct and periscope-based laryngoscopes compared to video laryngoscopes. Mean intubation times for experienced intubators were as follows: Direct Laryngoscope = 17.45 s, Video Laryngoscope = 23.34 s, and Novel Periscope-based Laryngoscope = 11.31 s, with statistical significance (p < 0.001) found between the Video and Periscope-based laryngoscope times. 100% of trials resulted in successful intubation of the trachea.
conclusionThe periscope-based laryngoscope yielded intubation times and first-pass success rates that compare favorably to direct and video laryngoscopes, and it can be readily manufactured in multiple environments at a low price point without proprietary industrial technology. Next steps include human clinical trials and regulatory approvals prior to clinical adoption of the novel device.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.