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[Intraocular contamination during cataract surgery according to surgical technique and type of implant]
1Service d'ophtalmologie, Centre Hospitalier Intercommunal, Villeneuve-St-Georges.
Purpose:
To determine wether the cataract extraction method and intraocular lens material affect bacterial contamination of the eye during surgery.
Methods:
This retrospective study evaluated microbial contamination of the anterior chamber fluid in three group of patients. Group 1: extracapsular extraction and PMMA lens (354 cases). Group 2: phacoemulsification and PMMA lens (474 cases). Group 3: phacoemulsification and silicone lens with PMMA haptic (264 cases).
Results:
Microbial contamination rate was in group 1: 5.65%, in group 2: 4.75%, and in group 3: 4.54%. The difference was not statistically significant (chi: 0.321). All contaminants were Gram positive.
Conclusion:
Bacterial contamination rate of the anterior chamber is similar during extracapsular extraction and phacoemulsification, and is not modified when using PMMA or silicone lens.
Insights
Cataract surgery methods and intraocular lens materials do not significantly impact bacterial contamination rates. Both extracapsular extraction and phacoemulsification, with polymethyl methacrylate (PMMA) or silicone lenses, show similar microbial contamination outcomes.
Area of Science:
- Ophthalmology
- Surgical Infection Prevention
- Microbiology
Background:
- Cataract surgery is a common procedure.
- Preventing intraocular infection is crucial for patient outcomes.
- Understanding factors influencing microbial contamination is essential.
Purpose of the Study:
- To investigate the influence of cataract extraction techniques on bacterial contamination.
- To assess the impact of intraocular lens (IOL) material on ocular microbial contamination.
- To compare contamination rates between different surgical approaches and IOL types.
Main Methods:
- Retrospective analysis of microbial contamination in anterior chamber fluid.
- Comparison of three patient groups: extracapsular extraction with PMMA IOL, phacoemulsification with PMMA IOL, and phacoemulsification with silicone IOL.
- Statistical analysis of contamination rates.
Main Results:
- Microbial contamination rates were 5.65% (Group 1), 4.75% (Group 2), and 4.54% (Group 3).
- No statistically significant difference in contamination rates was observed between the groups.
- All identified contaminants were Gram-positive bacteria.
Conclusions:
- Extracapsular extraction and phacoemulsification yield similar rates of bacterial contamination.
- The use of polymethyl methacrylate (PMMA) or silicone intraocular lenses does not significantly alter the risk of bacterial contamination.
- Current cataract surgery methods and common IOL materials appear to have comparable safety profiles regarding microbial contamination.