Evidence map›Paper›PMID 33219133›Full record

Trial reportEmergency medicine journal : EMJ2021

COVID-19 aerosol box as protection from droplet and aerosol contaminations in healthcare workers performing airway intubation: a randomised cross-over simulation study.

Muhaimin Noor Azhar, Aida Bustam, Khadijah Poh, Ahmad Zulkarnain Ahmad Zahedi, Mohd Zahir Amin Mohd Nazri, Mohammad Aizuddin Azizah Ariffin, Mohd Hafyzuddin Md Yusuf, Aliyah Zambri, Johnathan Y O Chong, Anhar Kamarudin and 3 more

Abstract readRandomized Controlled Trial
In one paragraph

Trial report in Emergency medicine journal : EMJ, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

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.

2 · The registry

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.

3 · Its place in the literature

Who cites it

23 citing papers in PubMed, 1 synthesis or guideline pooled it.

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  19. ORi™: a new indicator of oxygenation.Journal of anesthesia · 2021
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

13 authors.

Muhaimin Noor AzharAcademic Unit of Emergency Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.
Aida BustamAcademic Unit of Emergency Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia aidabustam@um.edu.my.ORCID http://orcid.org/0000-0001-9403-0734
Khadijah PohAcademic Unit of Emergency Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.
Ahmad Zulkarnain Ahmad ZahediAcademic Unit of Emergency Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.
Mohd Zahir Amin Mohd NazriAcademic Unit of Emergency Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.
Mohammad Aizuddin Azizah AriffinAcademic Unit of Emergency Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.
Mohd Hafyzuddin Md YusufAcademic Unit of Emergency Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.
Aliyah ZambriAcademic Unit of Emergency Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.
Johnathan Y O ChongDepartment of Emergency Medicine, University of Malaya Medical Centre, Kuala Lumpur, Malaysia.
Anhar KamarudinAcademic Unit of Emergency Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.
Bin Ting AngDepartment of Emergency Medicine, University of Malaya Medical Centre, Kuala Lumpur, Malaysia.
Affan IskandarDepartment of Emergency Medicine, University of Malaya Medical Centre, Kuala Lumpur, Malaysia.
Keng Sheng ChewFaculty of Medicine and Health Sciences, University of Malaysia Sarawak, Kota Samarahan, Malaysia.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundConcerns over high transmission risk of SARS-CoV-2 have led to innovation and usage of an aerosol box to protect healthcare workers during airway intubation in patients with COVID-19. Its efficacy as a barrier protection in addition to the use of a standard personal protective equipment (PPE) is not fully known. We performed a simulated study to investigate the relationship between aerosol box usage during intubation and contaminations on healthcare workers pre-doffing and post-doffing of PPE.

methodsThis was a randomised cross-over study conducted between 9 April to 5 May 2020 in the ED of University Malaya Medical Centre. Postgraduate Emergency Medicine trainees performed video laryngoscope-assisted intubation on an airway manikin with and without an aerosol box in a random order. Contamination was simulated by nebulised Glo Germ. Primary outcome was number of contaminated front and back body regions pre-doffing and post-doffing of PPE of the intubator and assistant. Secondary outcomes were intubation time, Cormack-Lehane score, number of intubation attempts and participants' feedback.

resultsThirty-six trainees completed the study interventions. The number of contaminated front and back body regions pre-doffing of PPE was significantly higher without the aerosol box (all p values<0.001). However, there was no significant difference in the number of contaminations post-doffing of PPE between using and not using the aerosol box, with a median contamination of zero. Intubation time was longer with the aerosol box (42.5 s vs 35.5 s, p<0.001). Cormack-Lehane scores were similar with and without the aerosol box. First-pass intubation success rate was 94.4% and 100% with and without the aerosol box, respectively. More participants reported reduced mobility and visibility when intubating with the aerosol box.

conclusionsAn aerosol box may significantly reduce exposure to contaminations but with increased intubation time and reduced operator's mobility and visibility. Furthermore, the difference in degree of contamination between using and not using an aerosol box could be offset by proper doffing of PPE.

Indexed as

AerosolsPatient SimulationAdultCOVID-19Cross-Over StudiesFemaleHealth PersonnelHumansInfectious Disease Transmission, Patient-to-ProfessionalIntubation, IntratrachealLaryngoscopyMalaysiaMaleManikinsPersonal Protective EquipmentAerosolsairwayemergency departmentinfectious diseasesSARS

Identifiers

PMID33219133
PMCPMC7681799

What OpenQuestion holds

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LicenceCC BY-NC
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Registered trials

None linked

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.