Related Experiment Videos
Preoperative disinfection of the conjunctival sac in cataract surgery
J Hara1, F Yasuda, M Higashitsutsumi
1Hara Eye Clinic, Osaka, Japan.
Abstract:
Conjunctival cultures were obtained from 488 patients undergoing cataract extraction. Bacterial isolation rates from the lids and conjunctiva were 84.6 and 36.7, respectively. Propionibacterium acnes was the only anaerobic organism identified. A significantly lower incidence of P. acnes was observed in the eyes after preoperative conjunctival irrigation using povidone-iodine solution (9%) compared with those using benzetonium chloride solution (30%). Topical use of ofloxacin and cefmenoxime for 1 or 2 days preoperatively, and irrigation of the conjunctival sac with a 16-fold-diluted povidone-iodine solution for at least 30 s immediately prior to cataract surgery are recommended.
Insights
Preoperative conjunctival irrigation with povidone-iodine significantly reduced bacterial contamination, including Propionibacterium acnes, during cataract surgery. This method is recommended alongside topical antibiotics for enhanced patient safety.
Area of Science:
- Ophthalmology
- Microbiology
- Surgical Infection Prevention
Background:
- Bacterial contamination of the conjunctiva is a risk factor for postoperative infections after cataract surgery.
- Propionibacterium acnes is a common anaerobic organism found on ocular surfaces.
- Effective preoperative disinfection protocols are crucial for minimizing surgical site infections.
Purpose of the Study:
- To evaluate the efficacy of different preoperative conjunctival irrigation solutions in reducing bacterial load.
- To identify the predominant bacterial species, including anaerobic organisms, on the ocular surface before cataract surgery.
- To recommend optimal antiseptic and antibiotic strategies for cataract surgery.
Main Methods:
- Conjunctival cultures were performed on 488 patients undergoing cataract extraction.
- Bacterial isolation rates from lids and conjunctiva were determined.
- Incidence of Propionibacterium acnes was compared between patients receiving povidone-iodine and benzetonium chloride irrigation.
- Topical antibiotics (ofloxacin, cefmenoxime) and diluted povidone-iodine irrigation were assessed.
Main Results:
- High bacterial isolation rates were observed from lids (84.6%) and conjunctiva (36.7%).
- Propionibacterium acnes was the sole anaerobic organism identified.
- Povidone-iodine irrigation showed a significantly lower incidence of P. acnes compared to benzetonium chloride.
- Preoperative topical antibiotics and povidone-iodine irrigation demonstrated effectiveness.
Conclusions:
- Preoperative conjunctival irrigation with povidone-iodine is effective in reducing bacterial contamination, including P. acnes.
- Combined use of topical antibiotics and povidone-iodine irrigation is recommended for cataract surgery.
- These measures can help prevent postoperative ocular infections.