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Effectiveness of intraoperative iodine in cataract surgery: cleanliness of the surgical field without preoperative topical antibiotics

  • Kazuki MatsuuraEmail author
  • Dai Miyazaki
  • Shin-ichi Sasaki
  • Yoshitsugu Inoue
  • Yumi Sasaki
  • Yumiko Shimizu
Clinical Investigation
  • 26 Downloads

Abstract

Purpose

To verify the possibility that preoperative topical antibiotics are not essential as long as iodine disinfection is performed during surgery.

Study design

Crossover equivalence trial.

Patients and methods

In 204 eyes of 102 patients who underwent routine bilateral cataract surgery, 1 eye was treated with intraoperative iodine, and the other, with preoperative topical antibiotics. For the intraoperative iodine eyes, 5 mL of 0.25% povidone-iodine was applied at 2 stages: (1) just after the placement of the speculum and (2) before intraocular lens (IOL) insertion. For the contralateral eyes, preoperative topical antibiotics were administered 3 days before surgery without intraoperative iodine. Conjunctival samples for culture were obtained at 3 time points: (a) presurgery, (b) beginning of surgery, and (c) postsurgery. Real-time polymerase chain reaction (PCR) samples were obtained at the beginning of surgery and before IOL insertion. Intracameral moxifloxacin was applied in all the cases.

Results

The respective positive bacterial culture rates for intraoperative iodine eyes and preoperative topical antibiotics eyes were 95.1% and 98.0% at (a), 7.8% and 5.9% at (b), and 60.8% and 62.7% at (c). A significant difference in the positive bacterial culture rate was not found at any time point. For the intraoperative iodine eyes, the bacterial DNA copy number at (b) was significantly lower than that for the preoperative topical antibiotics eyes.

Conclusions

The cleanliness of the operative field without using topical antibiotics was revealed to be equivalent to that of the conventional method (using preoperative antibiotics without intraoperative iodine) as long as intraoperative iodine was used.

Keywords

Cataract surgery Endophthalmitis Intraoperative iodine Povidone-iodine Preoperative topical antibiotics 

Notes

Acknowledgements

Grant-in-Aid for Scientific Research (to S.S., 15K20261) from the Ministry of Education, Culture, Sports, Science and Technology of Japan. Y.I. is a medical advisor to Senju Pharmaceutical Company, Japan. No conflicting relationship exists for the other authors.

Conflicts of interest

K. Matsuura, None; D. Miyazaki, Lecture fee (Senju, Santen, Pfizer); S. Sasaki, None; Y. Inoue, Grant (Santen, Alcon), Consultant fee (Senju); Y. Sasaki, None; Y. Shimizu, None.

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Copyright information

© Japanese Ophthalmological Society 2019

Authors and Affiliations

  • Kazuki Matsuura
    • 1
    Email author
  • Dai Miyazaki
    • 2
  • Shin-ichi Sasaki
    • 2
  • Yoshitsugu Inoue
    • 2
  • Yumi Sasaki
    • 3
  • Yumiko Shimizu
    • 2
  1. 1.Nojima HospitalKurayoshiJapan
  2. 2.Tottori UniversityYonagoJapan
  3. 3.The Research Foundation for Microbial Diseases of Osaka UniversityOsakaJapan

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