Aerosol generation through pars plana vitrectomy.
Br J Ophthalmol
; 105(9): 1313-1317, 2021 09.
Article
in English
| MEDLINE | ID: covidwho-1367419
ABSTRACT
PURPOSE:
To assess whether pars plana vitrectomy (PPV) is an aerosol-generating procedure (AGP) in an ex vivo experimental model.METHODS:
In this ex vivo study on 10 porcine eyes, optical particle counter was used to measure particles ≤10 µm using cumulative mode in the six in-built channels 0.3 µm, 0.5 µm, 1 µm, 2.5 µm, 5 µm and 10 µm aerosols during PPV. Two parts of the study were as follows (1) to assess the pre-experimental baseline aerosol count in the theatre environment where there are dynamic changes in temperature and humidity and (2) to measure aerosol generation with 23-gauge and 25-gauge set-up. For each porcine eye, five measurements were taken for each consecutive step in the experiment including pre-PPV, during PPV, fluid-air exchange (FAX) and venting using a flute with 23-gauge set-up and a chimney with 25-gauge set-up. Therefore, a total of 200 measurements were recorded.RESULTS:
With 23-gauge and 25-gauge PPV, there was no significant difference in aerosol generation in all six channels comparing pre-PPV versus PPV or pre-PPV versus FAX. Venting using flute with 23-gauge PPV showed significant reduction of aerosol ≤1 µm. Air venting using chimney with 25-gauge set-up showed no significant difference in aerosol of ≤1 µm. For cumulative aerosol counts of all particles measuring ≤5 µm, compared with pre-PPV, PPV or FAX, flute venting in 23-gauge set-up showed significant reduction unlike the same comparison for chimney venting in 25-gauge set-up.CONCLUSION:
PPV and its associate steps do not generate aerosols ≤10 µm with 23-gauge and 25-gauge set-ups.Keywords
Full text:
Available
Collection:
International databases
Database:
MEDLINE
Main subject:
Surgical Wound Infection
/
Vitrectomy
/
Eye Infections
/
Endophthalmitis
/
Aerosols
/
Microsurgery
Type of study:
Observational study
Limits:
Animals
Language:
English
Journal:
Br J Ophthalmol
Year:
2021
Document Type:
Article
Affiliation country:
Bjophthalmol-2020-317214
Similar
MEDLINE
...
LILACS
LIS