Ferraz, Daniel Araújo;
Guan, Zeyu;
Costa, Edinilson A;
Martins, Eduardo;
Keane, Pearse A;
Ting, Daniel Shu Wei;
Belfort, Rubens;
... Muccioli, Cristina; + view all
(2022)
Proposal of a new slit-lamp shield for ophthalmic examination and assessment of its effectiveness using computational simulations.
Arquivos Brasileiros de Oftalmologia
, 86
(4)
10.5935/0004-2749.20230058.
(In press).
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Abstract
PURPOSE: This study aimed to use computational models for simulating the movement of respiratory droplets when assessing the efficacy of standard slit-lamp shield versus a new shield designed for increased clinician comfort as well as adequate protection. METHODS: Simulations were performed using the commercial software Star-CCM+. Respiratory droplets were assumed to be 100% water in volume fraction with particle diameter distribution represented by a geometric mean of 74.4 (±1.5 standard deviation) μm over a 4-min duration. The total mass of respiratory droplets expelled from patients' mouths and droplet accumulation on the manikin were measured under the following three conditions: with no slit-lamp shield, using the standard slit-lamp shield, and using our new proposed shield. RESULTS: The total accumulated water droplet mass (kilogram) and percentage of expelled mass accumulated on the shield under the three aforementioned conditions were as follows: 5.84e-10 kg (28% of the total weight of particle emitted that settled on the manikin), 9.14e-13 kg (0.045%), and 3.19e-13 (0.015%), respectively. The standard shield could shield off 99.83% of the particles that would otherwise be deposited on the manikin, which is comparable to 99.95% for the proposed design. Conclusion: Slit-lamp shields are effective infection control tools against respiratory droplets. The proposed shield showed comparable effectiveness compared with conventional slit-lamp shields, but with potentially enhanced ergonomics for ophthalmologists during slit-lamp examinations.
| Type: | Article |
|---|---|
| Title: | Proposal of a new slit-lamp shield for ophthalmic examination and assessment of its effectiveness using computational simulations |
| Location: | Brazil |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.5935/0004-2749.20230058 |
| Publisher version: | http://dx.doi.org/10.5935/0004-2749.20230058 |
| Language: | English |
| Additional information: | This content is licensed under a Creative Commons Attributions 4.0 International License. |
| UCL classification: | UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Institute of Ophthalmology UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences UCL |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10149043 |
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