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Related Experiment Videos

Changes in bacterial strains before and after cataract surgery

T Hara1, N Hoshi, T Hara

  • 1Hara Eye Hospital, Utsunomiya, Japan.

Ophthalmology
|November 1, 1996
PubMed
Summary
This summary is machine-generated.

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Cataract surgery showed a low contamination rate of 1.7% in anterior chamber aspirates, even with live video and audio during the procedure. Most bacterial strains found post-surgery differed from preoperative samples.

Area of Science:

  • Ophthalmology
  • Microbiology
  • Surgical Infection Control

Background:

  • Cataract surgery, including phacoemulsification and intraocular lens implantation, carries a risk of microbial contamination.
  • Understanding the sources and patterns of bacterial contamination is crucial for preventing postoperative endophthalmitis.

Purpose of the Study:

  • To determine the contamination rates of conjunctival smears and anterior chamber aspirates post-cataract surgery.
  • To investigate the relationship between bacterial strains in the conjunctival sac and anterior chamber at surgery's conclusion and preoperative conjunctival samples.

Main Methods:

  • Bacterial strains from conjunctival smears (preoperative) and conjunctival smears/anterior chamber aspirates (postoperative) were analyzed in 58 eyes from 48 patients undergoing phacoemulsification with IOL implantation.

Related Experiment Videos

  • Surgeries were broadcast via closed-circuit television with audio explanation.

    • Main Results:

    • Postoperative contamination occurred in 10.3% of eyes (6/58): 1.7% in anterior chamber aspirates (1/58) and 8.6% in conjunctival smears (5/58).
    • Only 33% (2/6) of contaminated eyes at the conclusion of surgery harbored the same bacterial strain as found in preoperative conjunctival smears.
    • Sixty-seven percent of postoperative bacterial strains did not match preoperative strains from the same eye.

    Conclusions:

    • The incidence of culture-positive anterior chamber aspirates following phacoemulsification and IOL implantation is low (1.7%).
    • The concurrent use of televised broadcast and intraoperative audio explanation did not appear to increase contamination rates.
    • A significant proportion of bacterial strains identified post-surgery were different from those identified preoperatively, suggesting potential intraoperative acquisition or transient flora changes.