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Building the barricade-DIY slit lamp breath shield.

Clara Hoi Ka Wu1, Zakariya Jarrar2, Steven Harsum2

  • 1Ophthalmology, Epsom and Saint Helier Hospital NHS Trust, Carshalton, Sutton, UK clarahoika.wu@gmail.com.

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Summary

Ophthalmologists developed a simple, low-cost, waterproof breath shield to reduce SARS-CoV-2 transmission risk during slit lamp examinations. This easy-to-clean design significantly increased clinician confidence in preventing droplet spread.

Keywords:
COVID-19PDSAhand hygieneinfection controlquality improvement

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Area of Science:

  • Ophthalmology
  • Infectious Disease Control
  • Biomedical Engineering

Background:

  • Ophthalmologists face high risk of SARS-CoV-2 transmission due to close patient proximity during slit lamp exams.
  • A need exists for effective, accessible protective measures against droplet-borne infections in eye care settings.

Purpose of the Study:

  • To design and evaluate a simple, low-cost, waterproof breath shield for slit lamp examinations.
  • To assess the effectiveness of the designed breath shield in preventing droplet transmission.

Main Methods:

  • Designed and iteratively improved breath shield prototypes using Plan-Do-Study-Act cycles.
  • Utilized transparent laminating pouches and common office supplies for fabrication.
  • Tested droplet transmission prevention using a fluorescein spray model.

Main Results:

  • A user-friendly, easy-to-clean breath shield was developed after four iterative design cycles.
  • Clinician confidence in the breath shield's effectiveness against droplet transmission increased from 5.6% to 80%.
  • The final design demonstrated proof of concept for preventing droplet spread.

Conclusions:

  • A low-cost, easily replicable breath shield enhances safety for clinicians and patients during slit lamp examinations.
  • This intervention, combined with standard personal protective equipment, creates a safer clinical environment.
  • The design is adaptable for various slit lamp models, promoting widespread adoption.