Bacterial Dispersion Associated With Various Patient Face Mask Designs During Simulated Intravitreal Injections.
Am J Ophthalmol
; 223: 178-183, 2021 03.
Article
in English
| MEDLINE | ID: covidwho-1135232
ABSTRACT
PURPOSE:
We sought to investigate bacterial dispersion with patient face mask use during simulated intravitreal injections.DESIGN:
Prospective cross-sectional study.METHODS:
Fifteen healthy subjects were recruited for this single-center study. Each participant was instructed not to speak for 2 minutes, simulating a "no-talking" policy, while in an ophthalmic examination chair with an blood agar plate secured to the forehead and wearing various face masks (no mask, loose fitting surgical mask, tight-fitting surgical mask without tape, tight-fitting surgical mask with adhesive tape securing the superior portion of the mask, N95 mask, and cloth mask). Each scenario was then repeated while reading a 2-minute script, simulating a talking patient. The primary outcome measures were the number of colony-forming units (CFUs) and microbial species.RESULTS:
During the "no-talking" scenario, subjects wearing a tight-fitting surgical mask with tape developed fewer CFUs compared with subjects wearing the same mask without tape (difference 0.93 CFUs [95% confidence interval 0.32-1.55]; P = .003). During the speech scenarios, subjects wearing a tight-fitting surgical mask with tape had significantly fewer CFUs compared with subjects without a face mask (difference 1.07 CFUs; P = .001), subjects with a loose face mask (difference 0.67 CFUs; P = .034), and subjects with a tight face mask without tape (difference 1.13 CFUs; P < .001). There was no difference between those with a tight-fitting surgical mask with tape and an N95 mask in the "no-talking" (P > .99) and "speech" (P = .831) scenarios. No oral flora were isolated in "no-talking" scenarios but were isolated in 8 of 75 (11%) cultures in speech scenarios (P = .02).CONCLUSION:
The addition of tape to the superior portion of a patient's face mask reduced bacterial dispersion during simulated intravitreal injections and had no difference in bacterial dispersion compared with wearing N95 masks.
Full text:
Available
Collection:
International databases
Database:
MEDLINE
Main subject:
Bacteria
/
Patient Simulation
/
Equipment Design
/
Intravitreal Injections
/
Masks
Type of study:
Cohort study
/
Observational study
/
Prognostic study
/
Randomized controlled trials
Limits:
Adult
/
Female
/
Humans
/
Male
Language:
English
Journal:
Am J Ophthalmol
Year:
2021
Document Type:
Article
Affiliation country:
J.ajo.2020.10.017
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