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Structural damage to Schiotz tonometers after disinfection with solutions
1Eye Institute of the Pennsylvania College of Optometry, Philadelphia, USA.
Summary
Schiotz tonometers require disinfection, but CDC-recommended bleach and hydrogen peroxide damage the devices. 70% isopropyl alcohol is the safest disinfectant for maintaining Schiotz tonometer integrity in clinical settings.
Area of Science:
- Ophthalmology
- Infectious Disease Control
- Biomedical Engineering
Background:
- Schiotz tonometry is still used in non-traditional settings like nursing homes.
- Proper disinfection of tonometers is crucial to prevent infectious pathogen transmission.
- Previous research has not evaluated the impact of disinfectants on Schiotz tonometers.
Purpose of the Study:
- To investigate the effects of disinfectants recommended by the Centers for Disease Control and Prevention (CDC) on Schiotz tonometers.
- To determine the safest disinfection method for preserving the structural integrity of Schiotz tonometers.
Main Methods:
- Schiotz tonometers were soaked for 5-10 minutes in 3% hydrogen peroxide, 1:10 sodium hypochlorite, or 70% isopropyl alcohol.
- Structural integrity of the tonometers was assessed after disinfection exposure.
Main Results:
- Soaking in 1:10 sodium hypochlorite and 3% hydrogen peroxide caused significant damage, rendering the tonometers inoperable.
- 70% isopropyl alcohol resulted in minor damage, indicating it is the safest disinfectant among those tested.
- Extensive corrosion and damage were observed with hydrogen peroxide and bleach.
Conclusions:
- The CDC's recommended disinfection protocols have limited applicability to Schiotz tonometers due to material degradation.
- 70% isopropyl alcohol is the preferred disinfectant for Schiotz tonometers to maintain device functionality and safety.
- Further research may be needed to identify compatible disinfection methods for Schiotz tonometry.